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 Class   123INTERNAL-COMBUSTION ENGINES
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  1R           MISCELLANEOUS
  1A           . (1 indent ) Fuels, lubricants and additives
  2           COMBINED DEVICES
  3           . (1 indent ) Generating plants
  200           ROTARY
  201           . (1 indent ) Reversible
  202           . (1 indent ) With means to control degree of compression
  203           . (1 indent ) With combusted gas treatment or handling means
  204           . (1 indent ) With compression volume means in uninterrupted communication with expansion volume means
  205           . (1 indent ) With fuel injection means
  206           .. (2 indent ) And pump or control means
  207           .. (2 indent ) Into intake port
  208           .. (2 indent ) Into intake chamber
  209           .. (2 indent ) Into prechamber
  210           . (1 indent ) With ignition means
  211           .. (2 indent ) Plural
  212           . (1 indent ) With plural compression volume means
  213           .. (2 indent ) In series
  214           . (1 indent ) With plural expansion volume means
  215           .. (2 indent ) In series
  216           . (1 indent ) With charge treatment means
  217           .. (2 indent ) Exhaust gas recirculation
  218           .. (2 indent ) Rotor shape
  219           .. (2 indent ) Stratification
  220           .. (2 indent ) Preheating
  221           . (1 indent ) With transfer means intermediate single compression volume means and single expansion volume means
  222           .. (2 indent ) Isolated charge in movable transfer element
  223           .. (2 indent ) Reciprocating or oscillating compression volume means
  224           ... (3 indent ) Radially spaced from expansion volume means
  225           .... (4 indent ) Abutment acts as compression means
  226           .... (4 indent ) Compression means disposed in rotor
  227           .... (5 indent ) Vane acts as compression means
  228           .. (2 indent ) Compression volume means circumferentially disposed relative to expansion volume means
  229           ... (3 indent ) Transfer means in rotor
  230           ... (3 indent ) Compression volume is also expansion volume
  231           ... (3 indent ) Vane
  232           ... (3 indent ) Interengaging rotors
  233           .... (4 indent ) Nonparallel axes
  234           .. (2 indent ) Compression volume means axially disposed relative to expansion volume means
  235           ... (3 indent ) Transfer means in rotor
  236           ... (3 indent ) Vane
  237           ... (3 indent ) Abutment
  238           ... (3 indent ) Interengaging rotors
  239           .. (2 indent ) Compression volume means radially disposed relative to expansion volume means
  240           ... (3 indent ) Concentric
  241           . (1 indent ) With compression, combustion, and expansion in a single variable volume
  242           .. (2 indent ) Planetating rotor
  243           .. (2 indent ) Vane
  244           .. (2 indent ) Abutment
  245           .. (2 indent ) Alternately approaching and receding elements
  246           ... (3 indent ) Eccentric interengaging rotors
  247           . (1 indent ) Only combustion and expansion of charge in engine
  248           .. (2 indent ) Abutment
  249           .. (2 indent ) Interengaging rotors
  18R           OSCILLATING PISTON
  18A           . (1 indent ) Toroidal cylinder
  19           LIQUID PISTON
  21           CONVERTIBLE CYCLE
  22           INTERNAL COMBUSTION AND AIR
  23           SOLID FUEL
  24R           GUNPOWDER
  24A           . (1 indent ) Single shot gun powder motors
  25R           WATER AND HYDROCARBON
  25A           . (1 indent ) Water in charge
  25B           . (1 indent ) Water plus heat into charge
  25C           . (1 indent ) Water into cylinder
  25D           . (1 indent ) Water plus heat into charge
  25E           . (1 indent ) Water introduced by mixing with other materials
  25F           . (1 indent ) Water plus heat by mixing with other materials
  25G           . (1 indent ) Washers and cleaners
  25H           . (1 indent ) Washers and cleaners with heat
  25J           . (1 indent ) Automatic water control
  25K           . (1 indent ) Automatic water control; thermostatic
  25L           . (1 indent ) Automatic water control; suction
  25M           . (1 indent ) Automatic water control; speed
  25N           . (1 indent ) Automatic water control interconnected with throttle
  25P           . (1 indent ) Steam injection
  25Q           . (1 indent ) Cooling regulation
  26           ADDITIONAL AIR SUPPLY
  250           ENGINE MEANS HAVING INTERNAL VAPORIZING IN PRECHAMBER WITH ALL COMBUSTION IN MAIN CHAMBER
  251           . (1 indent ) Whirling in prechamber
  252           . (1 indent ) Vaporizing by a hot surface of prechamber
  253           PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES
  254           . (1 indent ) Chamber temperature control means
  255           . (1 indent ) Vaporizing in precombustion chamber
  256           . (1 indent ) Plural precombustion chambers
  257           . (1 indent ) Two-cycle
  258           . (1 indent ) Having timed valves to precombustion and main combustion chambers
  259           . (1 indent ) Having volumetric relation between precombustion and main combustion chambers
  260           . (1 indent ) With ignition means particularly positioned relative to precombustion and main combustion chambers
  261           . (1 indent ) With injection means particularly positioned relative to precombustion and main combustion chambers
  262           . (1 indent ) Having fluid whirling means
  263           .. (2 indent ) Whirling in precombustion chamber only
  264           . (1 indent ) Precombustion chamber is carried by a valve
  265           . (1 indent ) Precombustion and main chambers form an "I" head
  266           . (1 indent ) Precombustion chamber assembly inserted in spark plug hole
  267           .. (2 indent ) Separate fuel or combustible mixture added to precombustion chamber
  268           . (1 indent ) Valveless precombustion chamber
  269           . (1 indent ) Piston shape complements precombustion chamber discharge
  270           . (1 indent ) Precombustion chamber liner or coating
  271           .. (2 indent ) With liner mounting means
  272           .. (2 indent ) Including combustion catalyst liner or coating means
  273           . (1 indent ) Precombustion chamber mounting means
  274           . (1 indent ) Having combustible mixture forming means
  275           .. (2 indent ) By fuel injection into precombustion or main combustion chamber
  276           ... (3 indent ) Fuel injected into precombustion chamber formed in piston
  277           ... (3 indent ) By fuel injection into precombustion chamber with carbureted main chamber
  278           ... (3 indent ) By fuel injection into main chamber with carbureted precombustion chamber
  279           . (1 indent ) Piston carried precombustion chamber
  280           . (1 indent ) Atomizer, deflector, or shield in precombustion chamber
  281           . (1 indent ) Precombustion chamber shape is a figure of revolution
  282           .. (2 indent ) Figure of revolution is multishaped to form a precombustion chamber
  283           .. (2 indent ) Cylindrical
  284           .. (2 indent ) Spherical
  285           . (1 indent ) Precombustion chamber having a specific shape
  286           . (1 indent ) Having specific connecting passage means between precombustion and main combustion chambers
  287           .. (2 indent ) With ignition means in connecting passage
  288           .. (2 indent ) Having fuel, a combustible mixture, or air added in the connecting passage
  289           .. (2 indent ) Fluid flow through passage controlled by working piston
  290           ... (3 indent ) With whirling
  291           ... (3 indent ) Multiple connecting passages
  292           .. (2 indent ) With valve means or variable orifice means in the passage
  293           .. (2 indent ) Having multiple passages
  294           COMBUSTION CHAMBER MEANS HAVING FUEL INJECTION ONLY
  295           . (1 indent ) Combustible mixture stratification means
  296           . (1 indent ) Injector is an integral part of engine valve
  297           . (1 indent ) Combination igniting means and injector
  298           . (1 indent ) Injection of fuel onto igniter, deflector, heater, or atomizer
  299           . (1 indent ) Using multiple injectors or injections
  300           .. (2 indent ) Alternating multiple injectors (e.g., series injection)
  301           . (1 indent ) Injected fuel spraying into whirling fluid
  302           . (1 indent ) Air entering combustion chamber through plural inlets
  303           .. (2 indent ) Having inlet uncovered by working piston
  304           . (1 indent ) Injecting diverse fuels or different states of same fuel
  305           . (1 indent ) Having a particular relationship between injection and ignition characteristics (e.g., nozzle location, spray pattern, timing relative to igniter location, timing)
  27R           BURNING BY HIGHLY COMPRESSED AIR
  27GE           . (1 indent ) Gas engines (diesel type) convertible from liquid to gas or operable with liquid and gas
  27A           . (1 indent ) Oil engine air preheated
             OIL ENGINES
             . (1 indent ) Pump supply to air inlet
  37           MULTIPLE EXPLOSION
  38           ATMOSPHERIC
  39           NONCOMPRESSION
  41R           REVERSIBLE
  41E           . (1 indent ) Electrical
  41.01           COOLING
  41.02           . (1 indent ) Automatic coolant flow control
  41.03           .. (2 indent ) Float control
  41.04           .. (2 indent ) Shutters, air valves, dampers or adjustable cowls
  41.05           ... (3 indent ) Temperature and engine operation responsive
  41.06           ... (3 indent ) Servomotor-operated type
  41.07           ... (3 indent ) Interrelated shutter and throttle control
  41.08           .. (2 indent ) Valves for fluid coolant
  41.09           ... (3 indent ) Coolant source bypass
  41.1           .... (4 indent ) Radiator or condenser source
  41.11           .. (2 indent ) Air impeller
  41.12           ... (3 indent ) Temperature-responsive
  41.13           . (1 indent ) Interrelated coolant flow and throttle control
  41.14           . (1 indent ) System drained and/or heat-storing
  41.15           . (1 indent ) Indicators and safety devices
  41.16           . (1 indent ) Coolant sealed in cylinder valve or piston
  41.17           . (1 indent ) Coolant released into cylinder or valve passages
  41.18           . (1 indent ) Convertible
  41.19           . (1 indent ) Refrigerating cycle
  41.2           . (1 indent ) With vapor generation and/or condensing
  41.21           .. (2 indent ) Coolant circulation with condensing
  41.22           ... (3 indent ) Intake or carburetor connection
  41.23           ... (3 indent ) Entrained in secondary circuit
  41.24           ... (3 indent ) From top of jacket to bottom of radiator
  41.25           ... (3 indent ) Water bypasses condenser
  41.26           ... (3 indent ) Vapor only circulated
  41.27           ... (3 indent ) Overflow vent to condenser
  41.28           . (1 indent ) Multiple cylinders with equalized cooling
  41.29           . (1 indent ) Parallel flow
  41.3           . (1 indent ) Mixed air and liquid
  41.31           . (1 indent ) With cooling of additional parts or materials
  41.32           .. (2 indent ) With spark plug heat exchange
  41.33           .. (2 indent ) With lubricant heat exchange
  41.34           . (1 indent ) Internal cooling of moving parts; e.g., hollow valves, pistons, and movable cylinder
  41.35           .. (2 indent ) Piston
  41.36           ... (3 indent ) Telescoping piston and stationary conduits
  41.37           ... (3 indent ) Hollow piston rod
  41.38           .... (4 indent ) Wrist pin type; e.g., nonrigidly connected
  41.39           ... (3 indent ) Side wall opening
  41.4           .. (2 indent ) Rotary valves
  41.41           .. (2 indent ) Poppet-type valves
  41.42           . (1 indent ) Liquid coolants other than water and water treatment
  41.43           . (1 indent ) Movably mounted tank or radiator
  41.44           . (1 indent ) With liquid coolant circulating means
  41.45           .. (2 indent ) Jet pumps
  41.46           .. (2 indent ) Common drive for pump and fan
  41.47           .. (2 indent ) Engine shaft driven
  41.48           . (1 indent ) Devices for cooling liquid by air flow
  41.49           .. (2 indent ) Fan type
  41.5           . (1 indent ) Yielding or resilient walls
  41.51           . (1 indent ) Plural radiators and/or tanks in series
  41.52           . (1 indent ) Engine or cylinder-mounted heat dissipators
  41.53           .. (2 indent ) Hopper type
  41.54           . (1 indent ) With vent
  41.55           . (1 indent ) Combined
  41.56           . (1 indent ) Air-cooled
  41.57           .. (2 indent ) With liquid cooling
  41.58           .. (2 indent ) Flow-regulating means
  41.59           ... (3 indent ) Adjustable discharge
  41.6           .. (2 indent ) Steam dividing vanes, baffles, conduits, or the like for multiple cylinders
  41.61           ... (3 indent ) Individual deflecting cylinder baffles
  41.62           ... (3 indent ) Air duct with discharge ports or conduits
  41.63           .. (2 indent ) With impelling means
  41.64           ... (3 indent ) Jet type
  41.65           ... (3 indent ) Fan type
  41.66           .... (4 indent ) Suction
  41.67           .. (2 indent ) Jacketed cylinder
  41.68           ... (3 indent ) Spiral passages
  41.69           .. (2 indent ) Finned cylinder and/or head
  41.7           .. (2 indent ) Engine encasing air duct; e.g., cowling
  41.71           . (1 indent ) Plural materials
  41.72           . (1 indent ) With jacketed head and/or cylinder
  41.73           .. (2 indent ) Jet or spray within jacket
  41.74           .. (2 indent ) Multiple cylinder
  41.75           .. (2 indent ) Reentrant head
  41.76           .. (2 indent ) With cooled valve seats or guides
  41.77           ... (3 indent ) Poppet-type valves
  41.78           ... (3 indent ) Cylinder side wall valves
  41.79           .. (2 indent ) With passages, baffles, etc.
  41.8           ... (3 indent ) Spiral passages
  41.81           .. (2 indent ) Cylinder jacket supported solely by cylinder
  41.82R           .. (2 indent ) With head-cooling arrangements
  41.82A           ... (3 indent ) Composite head
  41.83           .. (2 indent ) Cylinder detachable
  41.84           ... (3 indent ) Flanged cylinder or liner
  41.85           . (1 indent ) Valve seats or guides
  41.86           CRANKCASE VENTILATION
  42           OSCILLATING CYLINDER
  43R           ROTATING CYLINDER
  44R           . (1 indent ) Radial
  44A           .. (2 indent ) Wheel
  44B           .. (2 indent ) Combustion chamber is center of star
  44C           .. (2 indent ) Two-cycle
  44D           .. (2 indent ) Valve casing-cylinders have no valves but have ports which register with ports in casing
  44E           .. (2 indent ) Cam transmission
  43A           . (1 indent ) Parallel to shaft
  43AA           .. (2 indent ) Parallel to shaft cam track
  43B           . (1 indent ) Toroidal cylinders
  43C           . (1 indent ) Cam transmission
  45R           ROTARY RECIPROCATING PISTON
  45A           . (1 indent ) Piston and crankshaft coaxial
  46R           FREE PISTON
  46A           . (1 indent ) Two chambers; one piston
  46B           . (1 indent ) Phasing means between two or more units
  46SC           . (1 indent ) Single chamber; one piston
  46E           . (1 indent ) Electric generating means
  46H           . (1 indent ) Hammer
  47R           VALVED PISTON
  47A           . (1 indent ) Charge passes from crankcase through valve in piston
  47AA           . (1 indent ) Lost motion connection actuates valve
  47AB           . (1 indent ) Inlet and exhaust valve in piston
  48R           ADJUSTABLE COMBUSTION CHAMBER
  48A           . (1 indent ) Piston in head adjusted manually or mechanically
  48AA           . (1 indent ) Piston in head adjusted
  48B           . (1 indent ) Piston varied by means in crankshaft, connecting rod or piston
  48C           . (1 indent ) Cylinder or sleeve-moved
  48D           . (1 indent ) Auxiliary chamber
  50R           RECIPROCATING CYLINDER
  50A           . (1 indent ) Four-cycle
  50B           . (1 indent ) Two-cycle
  51R           MULTIPLE PISTON, COMMON NONRESTRICTIVE COMBUSTION CHAMBER
  51A           . (1 indent ) Four-cycle
  51AA           .. (2 indent ) Four-cycle separate crankshaft for piston
  51AC           .. (2 indent ) Two or more combustion chambers between the piston
  51B           . (1 indent ) Two-cycle
  51BA           .. (2 indent ) Two-cycle separate crankshaft for piston
  51BB           .. (2 indent ) Piston offset from crankshaft
  51BC           .. (2 indent ) Plural combustion chamber and plural piston
  51BD           .. (2 indent ) Inlet or exhaust ports in two or more planes
  52.1           MULTIPLE CYLINDER
  52.2           . (1 indent ) Simultaneous compression, distinct pistons, restricted communication to a single combustion chamber
  52.3           .. (2 indent ) Four-stroke cycle
  52.4           ... (3 indent ) Multiple crankshafts
  52.5           .. (2 indent ) Two-stroke cycle
  52.6           ... (3 indent ) Multiple crankshafts
  53.1           . (1 indent ) Cylinder offset from crankshaft axis
  53.2           .. (2 indent ) Multiple crankshafts
  53.3           .. (2 indent ) Cylinders opposite
  53.4           ... (3 indent ) Two-stroke cycle
  53.5           .. (2 indent ) Crankshaft between parallel cylinders
  53.6           . (1 indent ) Cylinders having opposing heads
  54.1           . (1 indent ) Cylinders radiating
  54.2           .. (2 indent ) Star
  54.3           ... (3 indent ) Cam on rotary output shaft
  54.4           .. (2 indent ) "V" type
  54.5           ... (3 indent ) Odd number of cylinders
  54.6           ... (3 indent ) Six cylinder
  54.7           .... (4 indent ) Eight cylinder
  54.8           .... (5 indent ) More than eight cylinder
  55.1           .. (2 indent ) Semi-radial
  55.2           .. (2 indent ) Cylinders opposite
  55.3           ... (3 indent ) Cam on rotary output shaft
  55.4           ... (3 indent ) Four-stroke cycle
  55.5           .... (4 indent ) Cylinders opposite and aligned
  55.6           ... (3 indent ) Two-stroke cycle
  55.7           .... (4 indent ) Cylinders opposite and aligned
  56.1           . (1 indent ) Having rotary output shaft parallel to cylinders
  56.2           .. (2 indent ) Cam on rotary output shaft
  56.3           ... (3 indent ) Swash plate type
  56.4           .... (4 indent ) Single bank of cylinders
  56.5           .... (4 indent ) Motion converting means between two banks of cylinders
  56.6           .... (4 indent ) Multiple swash plate drive
  56.7           ... (3 indent ) Single bank of cylinders
  56.8           ... (3 indent ) Motion converting means between two banks of cylinders
  56.9           ... (3 indent ) Multiple cam drives
  57.1           .. (2 indent ) Shaft rotates through piston
  58.1           . (1 indent ) Cylinders in-line
  58.2           .. (2 indent ) Locked pistons
  58.3           ... (3 indent ) Two-stroke cycle
  58.4           .. (2 indent ) Lengthwise charging
  58.5           ... (3 indent ) Step piston
  58.6           .. (2 indent ) Step piston
  58.7           .. (2 indent ) Cylinder supercharged by pressure pulse of released exhaust gases
  58.8           .. (2 indent ) Exhaust to next cylinder ready to fire
  58.9           .. (2 indent ) Oscillating or reciprocating, nonpoppet valve
  59.1           .. (2 indent ) Rotary valve
  59.2           ... (3 indent ) Tapered
  59.3           ... (3 indent ) Sleeve valve
  59.4           ... (3 indent ) Disc valve
  59.5           .. (2 indent ) Plural carburetors
  59.6           .. (2 indent ) Multiple crankshafts
  59.7           .. (2 indent ) Two-stroke cycle
  60.1           . (1 indent ) Locked annular piston
             DOUBLE-ACTING
  61R           . (1 indent ) Two-cycle
  62           .. (2 indent ) Combined pump and motor cylinder
  61V           .. (2 indent ) Lengthwise scavenging of cylinders from cylinder head to piston
  63           . (1 indent ) Four-cycle
  64           SIX-CYCLE
  65R           TWO-CYCLE
  66           . (1 indent ) Combined pump and motor cylinder
  67           . (1 indent ) Divided pump discharge
  68           . (1 indent ) Pump compression
  69R           . (1 indent ) Separate air and gas pumps
  69V           .. (2 indent ) Lengthwise scavenging of cylinder by gas from cylinder head to piston
  70R           . (1 indent ) Pump and cylinder adjacent
  70V           .. (2 indent ) Lengthwise scavenging of power cylinder
  71R           . (1 indent ) Pump and cylinder coaxial
  71V           .. (2 indent ) Lengthwise scavenging of cylinder from head to piston
  71VA           .. (2 indent ) Sleeve valve
  72           . (1 indent ) Pump and cylinder inclined
             . (1 indent ) Rear compression
  73R           .. (2 indent ) Crankcase
  73A           ... (3 indent ) Fuel to crankcase
  73AA           ... (3 indent ) Ported piston
  73AV           .... (4 indent ) Valved
  73AB           ... (3 indent ) Inlet valve in head
  73AC           ... (3 indent ) Varies compression space
  73AD           ... (3 indent ) Lubricant oil and fuel mixing devices
  73AE           ... (3 indent ) Auxiliary piston moves synchronously with piston to enlarge volume of crankcase or incoming charge
  73AF           ... (3 indent ) Crankcase compression with auxiliary pump means
  73B           ... (3 indent ) Fuel to bypass
  73BA           .... (4 indent ) Lengthwise scavenging of cylinders from head
  73C           ... (3 indent ) Fuel to cylinder
  73CA           .... (4 indent ) Lengthwise scavenging of cylinders from head
  73CB           .... (4 indent ) With liquid pump to separate inlet
  73CC           .... (4 indent ) With gas or vapor pump to separate
  73D           ... (3 indent ) Disc valves
  73DA           .... (4 indent ) Charge to crankcase through crankshaft
  73E           ... (3 indent ) Reentrant cylinder head
  73F           ... (3 indent ) Stepped piston
  73FA           .... (4 indent ) Ported
  73S           ... (3 indent ) Supercharging of crankcase
  73V           ... (3 indent ) Valves for crankcase
  73SC           ... (3 indent ) Returns charge to crankcase or rejects to exhaust
  73PP           ... (3 indent ) Distinct passages from crankcase to cylinder
  73SP           ... (3 indent ) Slow-speed operation
  74R           .. (2 indent ) Cylinder
  74A           ... (3 indent ) Fuel to rear of piston
  74AA           .... (4 indent ) Lengthwise scavenging from head
  74AP           ... (3 indent ) Reduced portion of piston acts as guide
  74AC           ... (3 indent ) Cross head between piston and crank
  74AE           ... (3 indent ) Enclosed crankcase
  74B           ... (3 indent ) Lengthwise bypass
  74C           ... (3 indent ) Lengthwise cylinder combustion space
  74D           ... (3 indent ) Slide valve between chamber of pump and crankcase
  65PE           . (1 indent ) Exhaust ports
  65A           . (1 indent ) Inlet and exhaust ports in two or more planes
  65B           . (1 indent ) Pumps
  65BA           . (1 indent ) Blowers
  65PD           . (1 indent ) Port deflectors
  65E           . (1 indent ) Scavenging by inertia of exhaust gas and charging by use of pressure waves
  65S           . (1 indent ) Step piston (see sub. 59 BS)
  65V           . (1 indent ) Valves
  65VA           .. (2 indent ) Sleeve valve
  65VS           .. (2 indent ) Sleeve driven by auxiliary crankshafts
  65VB           . (1 indent ) Lengthwise scavenging list above
  65VC           . (1 indent ) Lengthwise scavenging exhaust above
  65VD           . (1 indent ) Intake and exhaust valve in top of cylinder
  65W           . (1 indent ) Whirl through piston-controlled ports
  65WA           .. (2 indent ) Whirl in top of cylinders and lengthwise scavenging
  65WV           . (1 indent ) Vacuum intake
  65SP           . (1 indent ) Single port for inlet and exhaust
  65EM           . (1 indent ) Exhaust manifolds
  65P           . (1 indent ) Ports
  306           MEANS TO WHIRL FLUID BEFORE, UPON, OR AFTER ENTRY INTO COMBUSTION CHAMBER
  307           . (1 indent ) Structural projection on working piston causes whirling
  308           . (1 indent ) Having multiple oxidant inlet means
  309           . (1 indent ) Specific spark plug location
  310           COMBUSTION CHAMBER HAVING MULTIPLE SPARK GAPS
  311           FOUR-CYCLE
  312           . (1 indent ) Engine cylinder having a reciprocating sleeve valve
  313           .. (2 indent ) Having a junk ring seal
  314           .. (2 indent ) Having sleeve valve lubrication means
  315           . (1 indent ) Multiple exhaust
  316           . (1 indent ) Having subcharger associated with the cylinder
  317           . (1 indent ) Crankcase compression of air or combustible mixture to be subsequently pumped into the working cylinder
  318           . (1 indent ) Rear compression of air or combustible mixture to be subsequently pumped into the working cylinder
  76           . (1 indent ) Scavenging
  77           . (1 indent ) Single revolution
  78R           . (1 indent ) Variable clearance
  78A           .. (2 indent ) Piston in head adjusted mechanically
  78AA           ... (3 indent ) Piston in head adjusted by fluid means
  78B           .. (2 indent ) Varying means is in the piston
  78BA           ... (3 indent ) Varying means is in the piston connection
  78C           .. (2 indent ) Cylinder or sleeve moved
  78D           .. (2 indent ) Auxiliary chamber
  78E           .. (2 indent ) Varying means is in the connecting rod
  78F           .. (2 indent ) Varying means is in the crankshaft
  79R           . (1 indent ) Single poppet valve
  79A           .. (2 indent ) Rotary valve and poppet which extends through rotary valve
  79C           .. (2 indent ) Concentric valves; relatively movable
  80R           . (1 indent ) Rotating valve
  80BA           .. (2 indent ) Rotary valve is perpendicular to cylinder
  80BB           .. (2 indent ) Rotary valve is parallel to cylinder
  80C           .. (2 indent ) Sleeve valve
  80D           .. (2 indent ) Disc valve
  80DA           .. (2 indent ) Rotary plug
  81R           . (1 indent ) Oscillating valve
  81B           .. (2 indent ) Oscillating valve - not sleeve or disc
  81C           .. (2 indent ) Sleeve valve
  81D           .. (2 indent ) Disc valve
  82           . (1 indent ) Rotating side shaft
  83           . (1 indent ) Rotating transverse shaft
  84           . (1 indent ) Adjacent supply and exhaust valves
  85           . (1 indent ) Aligned supply and exhaust valves
  86           . (1 indent ) Opposite supply and exhaust valves
  87           . (1 indent ) Longitudinal valve and lever
  88           . (1 indent ) Transverse valve and lever
  89           . (1 indent ) Transverse valve and bell crank
  319           ENGINE SPEED REGULATOR
  320           . (1 indent ) Responsive to deceleration mode (e.g., engine acting as a brake)
  321           .. (2 indent ) Valve timing altering means (e.g., axially sliding cam shaft)
  322           ... (3 indent ) Electrical means adapted to alter valve timing
  323           .. (2 indent ) Exhaust throttling or blocking
  324           .. (2 indent ) Part of the air or combustible mixture to the engine cylinder omitted
  325           .. (2 indent ) Deceleration responsive cutoff of fuel to engine (e.g., pollution control)
  326           ... (3 indent ) Rich resupply of fuel at end of deceleration
  327           .. (2 indent ) Auxiliary air fed to the engine
  328           .. (2 indent ) Idle jet bypassed by a slight opening of the throttle
  329           .. (2 indent ) Having means to retard spark (e.g., ignition timing)
  330           . (1 indent ) Engine speed reduction by overriching the combustible mixture (e.g., choking engine)
  331           .. (2 indent ) By electric means
  332           . (1 indent ) Engine speed reduction by fuel cutoff
  333           .. (2 indent ) By electric means
  334           . (1 indent ) Engine speed reduction by partial or complete omission of the ignition
  335           .. (2 indent ) By electric means
  336           . (1 indent ) Having plural throttle valve structure
  337           . (1 indent ) Specific throttle valve structure
  338           . (1 indent ) Fuel injection pump bypass control
  339.1           . (1 indent ) Idle speed control
  339.11           .. (2 indent ) By regulating spark ignition timing
  339.12           .. (2 indent ) And air-fuel ratio feedback controlled
  339.13           .. (2 indent ) Manual adjustment
  339.14           .. (2 indent ) Electrically operated control means
  339.15           ... (3 indent ) With fail-safe, backup, or malfunction detecting means
  339.16           ... (3 indent ) External load condition responsive
  339.17           .... (4 indent ) Air conditioner operating mode responsive (i.e., compressor on-off)
  339.18           .... (4 indent ) Accessory load (e.g., lights, heater blower motor, radiator fan motor, generator) on engine electrical system responsive
  339.19           ... (3 indent ) By engine speed error feedback
  339.2           .... (4 indent ) Dynamic state variable model
  339.21           .... (4 indent ) And integral or derivative control
  339.22           .... (4 indent ) And temperature responsive
  339.23           .... (4 indent ) Controlling throttle bypass
  339.24           ... (3 indent ) Temperature responsive
  339.25           ... (3 indent ) Including rotary actuator
  339.26           .... (4 indent ) Stepping motor type
  339.27           ... (3 indent ) Including linear reciprocating solenoid control device
  339.28           .... (4 indent ) Having valve controlled vacuum actuator
  339.29           .. (2 indent ) By overriding injection pump governor
  342           . (1 indent ) Regulator changes length of accelerator linkage
  343           . (1 indent ) Regulator accessory (e.g., cleaner, adjusting tool, etc.)
  344           . (1 indent ) Charge proportion varying (e.g., the fuel-air ratio is varied)
  345           . (1 indent ) By changing valve lift
  346           .. (2 indent ) Intake valve lift altered
  347           . (1 indent ) By changing valve timing
  348           .. (2 indent ) Intake valve timing altered
  349           . (1 indent ) Having condition responsive means with engine being part of a closed feedback system (e.g., cruise control)
  350           .. (2 indent ) Electrical sensing or regulating
  351           ... (3 indent ) Engine overspeed sensing with an indicator or alarm and speed regulation
  352           ... (3 indent ) Engine speed sensing having an error signal producing circuit
  353           .... (4 indent ) Having variable duty cycle multivibrator (e.g., length of "time on" in each cycle)
  354           .... (4 indent ) Having variable frequency multivibrator (e.g., number of "time ons" per unit of time)
  355           .... (4 indent ) Having phase difference detector
  356           .... (4 indent ) Circuit resonates (e.g., tuned) at governed speed
  357           .... (4 indent ) Electric fuel injection pump governor
  358           .... (5 indent ) Max-min governor (i.e., no control in between)
  359           .... (5 indent ) Fail-safe feature (e.g., cuts off fuel pump)
  360           .... (4 indent ) Circuit controls a fluid throttle operator (e.g., vacuum)
  361           .... (4 indent ) Circuit controls an electric throttle operator
  362           ... (3 indent ) Cold engine control
  363           .. (2 indent ) Mechanical sensor or regulator
  364           ... (3 indent ) Fuel injection pump governor (e.g., diesel)
  365           .... (4 indent ) Governor override
  366           .... (5 indent ) Engine starting or warm-up control
  367           .... (5 indent ) Variable throttle or control rod stop
  369           .... (4 indent ) Three-dimensional cam control
  370           .... (4 indent ) Acceleration responsive
  371           .... (4 indent ) Deceleration responsive
  372           .... (4 indent ) Biased axial link (e.g., sliding rod with spring return)
  373           .... (4 indent ) Pivoted link connected to pump rack
  374           .... (5 indent ) Movable fulcrum (e.g., slot and pin)
  375           ... (3 indent ) Fuel injection pressure governor
  376           ... (3 indent ) Throttle positioning
  377           .... (4 indent ) Safety override of dangerous manual position
  378           .. (2 indent ) Fluidic sensor or regulator
  379           ... (3 indent ) Fuel injection pump governor
  380           .... (4 indent ) Barometric sensor
  381           .... (4 indent ) Fuel viscosity sensor (e.g., temperature sensing)
  382           .... (4 indent ) Manifold pressure sensor
  383           .... (5 indent ) Supercharger
  384           .... (4 indent ) Floating piston-type governor (e.g., Bessiere)
  385           .... (4 indent ) Liquid fluid governor
  386           .... (5 indent ) Lubrication pressure sensor
  387           .... (5 indent ) Fuel pressure sensor
  388           .... (5 indent ) Override for basic mechanical governor
  389           ... (3 indent ) Intake manifold vacuum responsive
  390           ... (3 indent ) Fuel injection pressure governor
  391           ... (3 indent ) Responsive to intake airflow
  392           ... (3 indent ) Responsive to cooling fan airflow
  393           ... (3 indent ) Responsive to exhaust gas
  394           .. (2 indent ) By combustion air or air-fuel mixture cutoff
  395           . (1 indent ) Open loop condition responsive
  396           .. (2 indent ) Resistance or override acts on input connection to regulator
  397           ... (3 indent ) Shutdown safety device
  398           ... (3 indent ) Throttle position lock
  399           .. (2 indent ) Having an electrical device between input and speed regulator
  400           .. (2 indent ) Mechanical connection between input and speed regulator
  401           .. (2 indent ) Fluidic device between input and regulator
  402           . (1 indent ) Charge volume varying (e.g., total amount of mixture fed to engine is varied; relative amounts of air and fuel are fixed)
  403           .. (2 indent ) Throttling (e.g., volume varying using throttle valve)
  404           .. (2 indent ) Suction operated supply valve lift regulating
  405           .. (2 indent ) By engine operated valve
  406.11           SPARK IGNITION TIMING CONTROL
  406.12           . (1 indent ) Electronic control
  406.13           .. (2 indent ) With fail-safe, backup or malfunction detecting means
  406.14           ... (3 indent ) Including spark failure responsive means (e.g., misfire)
  406.15           ... (3 indent ) Fuel sensor malfunction responsive
  406.16           ... (3 indent ) Knock control malfunction responsive
  406.17           ... (3 indent ) Cylinder pressure sensor malfunction responsive
  406.18           ... (3 indent ) Engine shaft rotational position sensor malfunction responsive (e.g., crank shaft, cam shaft)
  406.19           .. (2 indent ) Closed loop feedback control of spark timing
  406.2           ... (3 indent ) Separate control for each cylinder
  406.21           .... (4 indent ) Knock responsive
  406.22           .... (4 indent ) Cylinder pressure responsive
  406.23           ... (3 indent ) Engine output (e.g., torque, speed, horsepower) or fuel consumption optimization
  406.24           ... (3 indent ) Including means responsive to the instantaneous change in engine speed (e.g., roughness, unstable combustion, etc.)
  406.25           .... (4 indent ) Acceleration or deceleration responsive
  406.26           ... (3 indent ) Combustion condition responsive
  406.27           .... (4 indent ) Combustion failure responsive (e.g., misfire)
  406.28           .... (4 indent ) Combustion condition sensed by optical sensor
  406.29           .... (4 indent ) Engine knock responsive
  406.3           .... (5 indent ) Fuel quality or composition signal responsive
  406.31           ..... (6 indent ) Alcohol concentration responsive
  406.32           ..... (6 indent ) Having a plurality of speed/load maps related to fuel quality or composition
  406.33           .... (5 indent ) With modifying or updating memory (i.e., learning)
  406.34           .... (5 indent ) Modification of knock signal by engine operating condition signal
  406.35           ..... (6 indent ) Engine operating condition is load or speed
  406.36           ...... (7 indent ) Acceleration or deceleration responsive
  406.37           .... (5 indent ) Having specific knock detecting means
  406.38           ..... (6 indent ) Knock frequency distribution pattern responsive
  406.39           ..... (6 indent ) Knock signal counting
  406.4           ..... (6 indent ) And specific system component mounting or location details
  406.41           .... (4 indent ) Engine cylinder pressure responsive
  406.42           .... (5 indent ) Peak pressure responsive
  406.43           .... (5 indent ) Responsive to derivative, integral or average of pressure
  406.44           ... (3 indent ) Exhaust gas condition responsive control of spark timing
  406.45           .. (2 indent ) Including control of combustible mixture or a constituent thereof (e.g., air, fuel, exhaust gas)
  406.46           ... (3 indent ) Acceleration or deceleration responsive
  406.47           ... (3 indent ) With fuel injection control
  406.48           ... (3 indent ) With exhaust gas recirculation (EGR) control
  406.49           .. (2 indent ) Barometric pressure responsive
  406.5           .. (2 indent ) Acceleration or deceleration responsive
  406.51           ... (3 indent ) Acceleration responsive
  406.52           .. (2 indent ) Throttle position responsive
  406.53           .. (2 indent ) Starting condition responsive
  406.54           ... (3 indent ) Start detected by engine speed
  406.55           .. (2 indent ) Temperature responsive (e.g., ambient, engine, etc.)
  406.56           .. (2 indent ) With magneto
  406.57           ... (3 indent ) And capacitor discharge for ignition spark energy
  406.58           .. (2 indent ) Having engine shaft rotational position signal generator (e.g., crank shaft, cam shaft)
  406.59           ... (3 indent ) Speed responsive timing control
  406.6           .... (4 indent ) Having counter or addressable memory (e.g., digital timing circuit)
  406.61           .... (5 indent ) Plural engine shaft position sensors
  406.62           ..... (6 indent ) Position sensors at separate shafts
  406.63           ..... (6 indent ) Position sensors having different pulse rates
  406.64           .... (5 indent ) Memory addressed by engine speed or load
  406.65           ..... (6 indent ) With microprocessor
  406.66           .... (4 indent ) With resistor/capacitor (RC) timing circuit (e.g., multivibrator)
  406.67           . (1 indent ) Vacuum timing control
  406.68           .. (2 indent ) Barometric pressure responsive
  406.69           .. (2 indent ) Condition responsive valve in fluid path from vacuum source
  406.7           ... (3 indent ) Temperature responsive
  406.71           .. (2 indent ) Fluid delay between vacuum source and actuator (e.g., fixed restriction)
  406.72           .. (2 indent ) Increasing vacuum retards spark timing
  406.73           .. (2 indent ) Plural diaphragms or actuators
  406.74           . (1 indent ) Mechanical or hydraulic link to throttle valve or accelerator
  406.75           . (1 indent ) Centrifugal timing mechanism
  406.76           . (1 indent ) Spark delay actuated or deactuated by starting device
  429           COMBUSTION CHAMBER MEANS COMBINED WITH AIR-FUEL MIXTURE FORMING MEANS
  430           . (1 indent ) Stratification in combustion chamber
  431           . (1 indent ) Having a single combustible mixture inlet combined with means for injecting additional fuel into the combustion chamber
  432           . (1 indent ) Air or combustible mixture entering the combustion chamber through plural inlets
  433           .. (2 indent ) One inlet is uncovered by piston travel
  434           CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL)
  435           . (1 indent ) Including cylinder pressure or temperature responsive means
  436           . (1 indent ) Including means responsive to instantaneous change in engine speed
  672           . (1 indent ) Including exhaust gas condition responsive means
  673           .. (2 indent ) With sensor controlling each cylinder individually
  674           .. (2 indent ) With modifying or updating memory (i.e., learning)
  675           ... (3 indent ) Acceleration or deceleration responsive
  676           .. (2 indent ) Exhaust gas temperature or pressure repsonsive
  677           .. (2 indent ) Combined with ambient condition responsive means (e.g., pressure)
  678           ... (3 indent ) Ambient temperature responsive
  679           .. (2 indent ) Combined with engine condition responsive means
  680           ... (3 indent ) Idling responsive
  681           ... (3 indent ) Engine load responsive
  682           .... (4 indent ) Acceleration or deceleration responsive
  683           .... (4 indent ) Throttle position responsive
  684           .... (4 indent ) Pressure downstream of throttle valve responsive
  685           ... (3 indent ) Starting or warmup responsive
  686           .... (4 indent ) Engine coolant temperature responsive
  687           ... (3 indent ) Speed responsive
  688           ... (3 indent ) Inoperative sensor responsive
  689           ... (3 indent ) Engine fluid or engine component temperature responsive
  690           .. (2 indent ) With fail-safe, backup, or malfunction means
  691           .. (2 indent ) Multiple sensors controlling group of cylinders
  692           ... (3 indent ) Controlling plural groups of cylinders
  693           .. (2 indent ) With compensator for sensor output (e.g., current or voltage)
  694           ... (3 indent ) Output fed to compensating circuit
  695           .... (4 indent ) Variable reference value
  696           .... (4 indent ) Proportional or integral circuit
  697           ... (3 indent ) Heater for sensor or sensor environment
  698           .. (2 indent ) With addition of secondary fluid (e.g., fuel or exhaust gas)
  699           ... (3 indent ) Secondary fluid is auxiliary air or oxygen (e.g., carburetor air bleed)
  700           .... (4 indent ) Fed to air/fuel mixture
  701           .. (2 indent ) With auxiliary control of carburetor
  702           ... (3 indent ) Variable venturi carburetor
  703           .. (2 indent ) Exhaust gas composition sensor
  704           . (1 indent ) Air/fuel ratio prior to combustion responsive means
  437           . (1 indent ) Auxiliary control of carburetor fuel metering
  438           .. (2 indent ) By electrical or electronic control system
  439           ... (3 indent ) Variable venturi carburetor
  441           .. (2 indent ) By mechanical speed sensor
  442           . (1 indent ) Injection or carburetion system having a series of throttle valves
  443           . (1 indent ) Alternate or simultaneous lean-rich
  444           . (1 indent ) Having fluidic logic control means
  445           . (1 indent ) Fuel injection system
  446           .. (2 indent ) Fuel pump flow regulation
  447           ... (3 indent ) With accumulator
  448           ... (3 indent ) Sequential distributor
  449           .... (4 indent ) Rotary and reciprocating distributor
  450           .... (4 indent ) Rotary distributor
  451           .... (4 indent ) Reciprocating distributor
  452           ... (3 indent ) Nonsequential distributor
  453           .... (4 indent ) Enrichment of the combustible mixture for cold starting or cold running
  454           .... (4 indent ) Equal pressure valve type
  455           .... (4 indent ) Distributor and metering unit are in common housing
  456           .... (4 indent ) Common rail system
  457           ... (3 indent ) Regulating means adjusts fuel pressure
  458           .... (4 indent ) Electric regulator
  459           .... (4 indent ) Bleed off valve
  460           .... (4 indent ) Series regulator
  461           .... (4 indent ) Having vapor returned to tank or pump inlet
  462           .... (4 indent ) By throttle control
  463           .... (4 indent ) Manifold pressure responsive
  464           .... (4 indent ) Temperature responsive
  465           .... (4 indent ) Barometric responsive
  466           .... (4 indent ) Having an antitampering device
  467           .. (2 indent ) Drip prevention means at injector nozzle
  468           .. (2 indent ) Having a specific shape, material, or location of fuel line
  469           ... (3 indent ) Specific fuel line mounting means
  470           .. (2 indent ) Injection nozzle mounting means
  471           ... (3 indent ) Nozzle isolated from manifold vacuum effect
  472           .. (2 indent ) Electrically actuated injector
  473           ... (3 indent ) Mechanically actuated switching
  474           .... (4 indent ) Ignition distributor used as switch
  475           ... (3 indent ) Actuated by ignition pulse
  476           ... (3 indent ) Magnetically actuated switching
  477           ... (3 indent ) Radiation actuated switching
  478           ... (3 indent ) Actuator circuit (e.g., engine condition responsive electronic circuit actuates injector valve)
  479           .... (4 indent ) Backup systems, fail-safe, failure indicator
  480           .... (4 indent ) Having microprocessor
  481           .... (4 indent ) Engine cylinder cutout
  482           .... (4 indent ) Circuit activates valve for continuous fuel flow
  483           .... (4 indent ) Having plural multivibrators
  484           .... (4 indent ) Having single multivibrator
  485           .... (4 indent ) Having ramp generator
  486           .... (4 indent ) Having a digital memory addressed by an engine parameter
  487           .... (4 indent ) Having an up or up-down counter in circuit
  488           .... (4 indent ) Subcircuit operates on a parameter sensor output before input to main fuel control (e.g., function generator)
  490           .... (4 indent ) Injector solenoid drive
  491           .... (4 indent ) Starting condition responsive
  492           .... (4 indent ) Acceleration or full load condition responsive
  493           .... (4 indent ) Deceleration condition responsive
  494           .... (4 indent ) Having specific transducer
  495           . (1 indent ) With fuel pump
  496           .. (2 indent ) Variable rate of injection stroke
  497           .. (2 indent ) Electric fuel pump
  498           ... (3 indent ) Piezoelectric drive
  499           ... (3 indent ) Solenoid drive
  500           .. (2 indent ) Variable beginning and ending of pumping stroke
  501           .. (2 indent ) Variable beginning of pumping stroke
  502           ... (3 indent ) Fluid pressure control
  503           .. (2 indent ) Variable ending of pumping stroke
  504           .. (2 indent ) Variable stroke
  505           .. (2 indent ) Fuel pump and intake air controls interconnected
  506           .. (2 indent ) Having pressure relief valve
  507           .. (2 indent ) Pumping member driven by a piston or valve of the internal combustion engine
  508           .. (2 indent ) Pumping member driven by the internal combustion engine valve operating mechanism
  509           .. (2 indent ) Specific location or mounting of pump
  510           . (1 indent ) Fuel flow regulation between the pump and the charge-forming device
  511           .. (2 indent ) Regulator means adjusts fuel pressure
  512           ... (3 indent ) Engine parameter responsive
  513           ... (3 indent ) Environmental condition responsive
  514           .. (2 indent ) Excess fuel returned to tank
  515           .. (2 indent ) Regulator controls flow of a plurality of fuels
  516           .. (2 indent ) Air or fuel vapor purging system
  517           .. (2 indent ) Carburetor float bowl drain
  518           . (1 indent ) Having fuel vapor recovery and storage system
  519           .. (2 indent ) Having an adsorbent canister
  520           ... (3 indent ) Purge valve controlled by engine parameter
  521           .... (4 indent ) Responsive to secondary air pressure
  522           . (1 indent ) Liquid fuel evaporating by submerged air supply
  523           . (1 indent ) Liquid fuel evaporating by extended fuel film
  524           .. (2 indent ) Screen or mat
  525           . (1 indent ) Combined liquid and gaseous fuel
  526           .. (2 indent ) Diesel engine convertible from liquid to gas
  527           . (1 indent ) Gaseous fuel and air mixer
  528           .. (2 indent ) Supercharged engine
  529           .. (2 indent ) Safety device (e.g., cutoff)
  530           . (1 indent ) Constant flow fuel supply
  531           . (1 indent ) Auxiliary air or gas used to inject fuel
  532           .. (2 indent ) Air is bled from the cylinder on the compression stroke in that cylinder
  533           .. (2 indent ) Having a separate pump for the air or gas
  534           .. (2 indent ) Air is bled from another engine cylinder
  535           .. (2 indent ) Constant fuel level
  536           . (1 indent ) Combustible mixture ionization, ozonation, or electrolysis
  537           .. (2 indent ) Before intake valve (e.g., in manifold)
  538           .. (2 indent ) Fuel only
  539           .. (2 indent ) Air only
  540           . (1 indent ) Cooling of combustible mixture
  541           .. (2 indent ) Fuel only
  542           .. (2 indent ) Air only
  543           . (1 indent ) Heating of combustible mixture
  544           .. (2 indent ) Lighter fuel is used during starting
  545           .. (2 indent ) Heating meduim surrounds combustible mixture
  546           .. (2 indent ) Combustible mixture surrounds heating medium
  547           .. (2 indent ) Combustible mixture and heating meduim adjoin one another
  548           .. (2 indent ) Trap for liquid particle vaporization
  549           .. (2 indent ) Electric heater
  550           .. (2 indent ) Combustion heater
  551           ... (3 indent ) Part of combustible mixture is burned
  552           .. (2 indent ) Automatic control
  553           .. (2 indent ) Intermediate fluid used for heating
  554           .. (2 indent ) Combustible mixture, air, and fuel are heated separately
  555           .. (2 indent ) Air and fuel heated separately
  556           .. (2 indent ) Air only
  557           .. (2 indent ) Fuel only
  558           ... (3 indent ) Fuel is heated to ignition temperature
  559.1           . (1 indent ) Supercharger
  559.2           .. (2 indent ) Pressure exchange with exhaust gas
  559.3           .. (2 indent ) With clutch
  560           .. (2 indent ) Two-cycle compressor feeds a four-cycle engine
  561           .. (2 indent ) Variable ratio compressor driven supercharger
  562           .. (2 indent ) Multiple superchargers
  563           .. (2 indent ) Intercooler
  564           .. (2 indent ) Boost control
  565           .. (2 indent ) Supercharger is driven independently of the engine
  566           .. (2 indent ) Funnel-type supercharger (e.g., ram-air)
  567           . (1 indent ) Oxidant is solely oxygen
  568.11           . (1 indent ) Exhaust gas used with the combustible mixture (e.g., emission control Exhaust Gas Recirculation (EGR) valve)
  568.12           .. (2 indent ) Exhaust gas cooled during recirculation
  568.13           .. (2 indent ) Having recirculation path formed entirely in the cylinder block or head
  568.14           .. (2 indent ) Internal exhaust gas recirculation (e.g., exhaust gas retained in the combustion chamber)
  568.15           .. (2 indent ) Having exhaust gas mixed with a constituent before entry into intake manifold
  568.16           .. (2 indent ) With electrical means for fail-safe, backup, or malfunction detecting of EGR system
  568.17           .. (2 indent ) Having specific exhaust gas outlet structure at intake manifold
  568.18           ... (3 indent ) Having a valve located at the outlet of the EGR passage
  568.19           .. (2 indent ) EGR valve position controlled only in relationship to intake throttle valve position
  568.2           .. (2 indent ) Plural EGR valves in the recirculation passage
  568.21           .. (2 indent ) Having electrically actuated control means
  568.22           ... (3 indent ) Ambient condition responsive (e.g., atmospheric temperature, atmospheric pressure)
  568.23           ... (3 indent ) Having rotary actuator control of EGR valve
  568.24           .... (4 indent ) Electrical rotary actuator rotates the EGR valve
  568.25           .... (4 indent ) Vacuum actuator control of EGR valve
  568.26           ... (3 indent ) Having electromechanical actuator control of EGR valve
  568.27           .... (4 indent ) Controlling vacuum actuator
  568.28           .... (5 indent ) Including auxiliary vacuum pump
  568.29           .. (2 indent ) Vacuum actuator control of EGR valve
  568.3           ... (3 indent ) Including auxiliary vacuum pump
  568.31           ... (3 indent ) Temperature responsive
  568.32           ... (3 indent ) Having fixed restriction in vacuum line
  572           . (1 indent ) Crankcase vapor used with combustible mixture
  573           .. (2 indent ) Vapor treated before mixing with combustible mixture (e.g., cooling)
  574           .. (2 indent ) Specific control valve (e.g., PCV valve)
  575           . (1 indent ) Diverse fuel supply
  576           .. (2 indent ) Fuel switched in response to engine starting condition
  577           .. (2 indent ) Fuel switched, condition responsive to load
  578           .. (2 indent ) Fuel switched in response to engine temperature
  579           . (1 indent ) Multiple carburetors
  580           .. (2 indent ) Each carburetor feeds a cylinder or group of cylinders (e.g., split engine)
  581           .. (2 indent ) Separate carburetor for starting
  582           .. (2 indent ) Separate carburetor for high load
  583           .. (2 indent ) With linkage between carburetor throttle valves
  584           ... (3 indent ) Staged opening of carburetor throttle valves
  585           . (1 indent ) Auxiliary air or oxygen added to combustible mixture
  586           .. (2 indent ) Oxidant controlled by throttle
  587           .. (2 indent ) Oxidant controlled by intake manifold vacuum
  588           .. (2 indent ) Oxidant controlled by engine temperature
  590           . (1 indent ) Charge-mixing device in intake (e.g., device which insures the atomization of the combustible mixture)
  591           .. (2 indent ) Having liquid fuel collector
  592           .. (2 indent ) By fan means
  593           .. (2 indent ) By screen means
  594           HIGH TENSION IGNITION SYSTEM
  595           . (1 indent ) Retrofit conversion ignition unit
  596           . (1 indent ) Using capacitive storage and discharge for spark energy
  597           .. (2 indent ) Regulating sensed ignition capacitor voltage
  598           .. (2 indent ) Having an oscillator
  599           .. (2 indent ) Having a magneto
  600           ... (3 indent ) Triggering voltage obtained from capacitor charging winding
  601           ... (3 indent ) Specific design of charge or trigger winding core
  603           ... (3 indent ) Antireverse protection
  604           .. (2 indent ) Inductive capacitive discharge system
  605           .. (2 indent ) Having a specific capacitor, ignition coil means, or switching element circuit path
  606           . (1 indent ) High frequency ignition system
  607           .. (2 indent ) Free running oscillator supplies coil primary
  608           .. (2 indent ) Having a specific spark plug
  609           . (1 indent ) Having dwell control
  610           .. (2 indent ) Using a monostable multivibrator
  611           .. (2 indent ) Dwell maintained at constant value
  612           . (1 indent ) Having engine component position sensor
  613           .. (2 indent ) Optical sensing
  614           .. (2 indent ) Including a zero crossing detector
  615           .. (2 indent ) Includng an oscillator
  616           .. (2 indent ) Piezoelectric sensor
  617           .. (2 indent ) Inductive or magnetic sensor
  618           . (1 indent ) Having specific trigger circuitry
  619           .. (2 indent ) Oscillatory trigger circuit
  620           . (1 indent ) Additional spark energy supply
  621           . (1 indent ) Having an ignition coil with multiple primary or secondary windings
  622           .. (2 indent ) Separate circuit for each winding
  623           . (1 indent ) Having supply voltage regulation
  624           . (1 indent ) Having ballast resistor cutout or control
  625           . (1 indent ) Responsive to engine or environmental condition
  626           .. (2 indent ) Oscillator or trigger circuit responsive to engine condition
  627           . (1 indent ) Having auxiliary spark gap in series or parallel with the coil
  628           . (1 indent ) Having a continuous high voltage output to the high voltage distributor
  629           . (1 indent ) Monostable multivibrator controls timing of coil primary current
  630           . (1 indent ) Safety device
  631           .. (2 indent ) Reverse engine rotation protection
  632           .. (2 indent ) Ignition switch opened when engine stops
  633           . (1 indent ) Radio interference protection
  634           . (1 indent ) Having a specific ignition coil
  635           . (1 indent ) Specific coil location
  636           . (1 indent ) Multiple spark ignition system
  637           .. (2 indent ) System fires single spark plug per cylinder
  638           .. (2 indent ) System fires multiple spark plugs per cylinder
  639           .. (2 indent ) System using vibrator for multiple sparks upon starting
  640           . (1 indent ) Dual systems
  641           .. (2 indent ) One for starting
  642           . (1 indent ) Piezoelectric voltage generator
  643           . (1 indent ) Electronic cylinder sequencing
  644           . (1 indent ) Current or voltage sensing in coil primary
  645           . (1 indent ) Maverick spark suppressor
  646           .. (2 indent ) Point bounce or arc suppression system
  647           . (1 indent ) Having a specific mounting of system component
  648           . (1 indent ) Having SCR triggered by lowering cathode voltage below ground
  649           . (1 indent ) Multiple primary current interrupters
  650           . (1 indent ) Power supply, ignition coil primary, and interrupter element all in series
  651           .. (2 indent ) Interrupter is multiple transistor circuit
  652           .. (2 indent ) Interrupter is single transistor
  653           .. (2 indent ) Additional capacitor other than breaker point capacitor is in series with coil primary or secondary
  654           .. (2 indent ) Additional capacitor other than breaker point capacitor is in parallel with coil primary or secondary
  655           .. (2 indent ) Diode is in series with coil primary or secondary
  656           .. (2 indent ) Diode is in parallel with coil primary or secondary
  90.1           POPPET VALVE OPERATING MECHANISM
  90.11           . (1 indent ) Electrical system
  90.12           . (1 indent ) Hydraulic system
  90.13           .. (2 indent ) With manifold and distributor
  90.14           . (1 indent ) Pneumatic system
  90.15           . (1 indent ) With means for varying timing
  90.16           .. (2 indent ) Cam-to-valve relationship
  90.17           .. (2 indent ) Camshaft or cam characteristics
  90.18           ... (3 indent ) Axially shiftable camshaft
  90.19           . (1 indent ) With temperature compensation
  90.2           . (1 indent ) With compound movement of cam follower
  90.21           . (1 indent ) Follower displaced axially of camshaft
  90.22           . (1 indent ) Plural valve trains, single actuator
  90.23           .. (2 indent ) Intake and exhaust
  90.24           . (1 indent ) Valve driven closed
  90.25           .. (2 indent ) By valve-opening rocker
  90.26           .. (2 indent ) By cam-actuated unitary follower
  90.27           . (1 indent ) Overhead camshaft
  90.28           . (1 indent ) With nonvalving movement (e.g., about valve stem)
  90.29           .. (2 indent ) Oscillating movement converted internally
  90.3           .. (2 indent ) Positive rotation provided by internal means
  90.31           . (1 indent ) Camshaft drive means
  90.32           . (1 indent ) With alternate interruption of drive train
  90.33           . (1 indent ) Lubrication
  90.34           .. (2 indent ) Camshaft
  90.35           .. (2 indent ) Tappet as conduit
  90.36           .. (2 indent ) Rocker fulcrum as conduit
  90.37           .. (2 indent ) Seals and shields
  90.38           .. (2 indent ) Housings
  90.39           . (1 indent ) Rocker
  90.4           .. (2 indent ) Plural valves
  90.41           .. (2 indent ) Individually fulcrumed
  90.42           ... (3 indent ) Rotation prevention
  90.43           ... (3 indent ) Lash adjustment at fulcrum
  90.44           .. (2 indent ) Cam engaged
  90.45           .. (2 indent ) Lash adjustment
  90.46           ... (3 indent ) Hydraulic
  90.47           .. (2 indent ) Yieldable engagement
  90.48           . (1 indent ) Tappet
  90.49           .. (2 indent ) Cushion and silencer
  90.5           .. (2 indent ) Rotation prevention
  90.51           .. (2 indent ) Composition, surface treatment manufacture
  90.52           .. (2 indent ) Lash adjustment
  90.53           ... (3 indent ) Self-operating
  90.54           .... (4 indent ) Screw
  90.55           .... (4 indent ) Hydraulic
  90.56           .... (5 indent ) Pressure flow upwardly into pressure chamber
  90.57           .... (5 indent ) Vent or bleed means for pressure chamber
  90.58           .... (5 indent ) Self-contained
  90.59           .... (5 indent ) With provision for horizontal positioning
  90.6           . (1 indent ) Cam
  90.61           . (1 indent ) Rod
  90.62           .. (2 indent ) Self-adjusting
  90.63           ... (3 indent ) Hydraulic
  90.64           .. (2 indent ) Pull type
  90.65           . (1 indent ) Spring
  90.66           .. (2 indent ) Attenuated
  90.67           .. (2 indent ) Seat and retainer
  143R           IGNITERS
  144           . (1 indent ) Flame
  145R           . (1 indent ) Incandescent
  146           .. (2 indent ) Valve controlled
  145A           .. (2 indent ) Electric (incandescent ignitors using electricity as a source of heat)
  146.5R           . (1 indent ) Sparkers
  147           .. (2 indent ) Low tension
  149R           .. (2 indent ) Dynamos
  149A           ... (3 indent ) Inductor type
  149B           ... (3 indent ) Impulse starters
  149D           ... (3 indent ) Flywheel type
  149E           ... (3 indent ) Oscillating armature type
  149F           ... (3 indent ) Special waveforms
  149FA           .... (4 indent ) Double current generators
  149G           ... (3 indent ) Movable pole shoes and bell-magnets
  149H           ... (3 indent ) Reciprocating
  150           .. (2 indent ) Combined adjusting and exhaust regulating
  151           .. (2 indent ) Combined sparker and valve
  152           .. (2 indent ) Combined valve and sparker operating
  169R           .. (2 indent ) Plugs
  169CL           ... (3 indent ) Cleaners automatic
  169CM           .... (4 indent ) Cleaners manual
  169CA           ... (3 indent ) Compound insulation
  169CB           ... (3 indent ) Core retaining
  169DW           ... (3 indent ) Disk wrappings type
  169EL           ... (3 indent ) Electrodes
  169EA           ... (3 indent ) Adjustable gap
  169EB           ... (3 indent ) Replaceable electrode
  169EC           ... (3 indent ) Adjustable and replaceable
  169C           ... (3 indent ) Cool
  169E           ... (3 indent ) Insulated electrodes
  169G           ... (3 indent ) Intensity in gap only
  169P           ... (3 indent ) Insulating protecting
  169PA           .... (4 indent ) Tubes and attachments
  169PB           .... (4 indent ) Heaters
  169PH           .... (4 indent ) Hoods and shields
  169MG           ... (3 indent ) Multiple firing gap
  169TC           ... (3 indent ) Transparent combustion chamber
  169V           ... (3 indent ) Valved
  153           .. (2 indent ) Make and break
  154           ... (3 indent ) Electromagnetic
  155           ... (3 indent ) Pneumatic
  162           ... (3 indent ) Piston-operated
  156           ... (3 indent ) Reciprocating electrode
  157           ... (3 indent ) Rocking-electrode hammer action
  158           ... (3 indent ) Rocking and rigid electrodes
  159           ... (3 indent ) Rocking and yielding electrodes
  160           ... (3 indent ) Oscillating electrodes
  161           ... (3 indent ) Rotary electrodes
  163           ... (3 indent ) Stationary-electrode structure
  164           ... (3 indent ) Adjusting mechanism
  146.5A           .. (2 indent ) Timers
  146.5B           .. (2 indent ) Ignition locks
  146.5C           .. (2 indent ) Fluid level or pressure-actuated ignition switches
  146.5D           .. (2 indent ) Devices for opening the ignition circuit when engine stops in order to save battery
  143A           . (1 indent ) High compression igniters
  143B           . (1 indent ) Special charge igniters
  143C           . (1 indent ) Insulated casing enclosing wires leading to plugs, distributor, etc.
  192.1           VIBRATION COMPENSATING DEVICE
  192.2           . (1 indent ) Balancing arrangement
  197.1           TRANSMISSION MECHANISM FROM PISTON
  197.5           . (1 indent ) Including clutch
  197.2           . (1 indent ) With particular piston
  197.4           . (1 indent ) Crankshaft and connecting rod
  197.3           .. (2 indent ) Particular connecting rod
  179.1           STARTING DEVICE
  179.2           . (1 indent ) Remote control
  179.3           . (1 indent ) Condition responsive control of starting device
  179.4           .. (2 indent ) Including automatic engine stop
  179.5           . (1 indent ) Control of spark ignition during starting
  179.6           . (1 indent ) Control of glow plug during starting
  179.7           . (1 indent ) Auxiliary fuel supply device
  179.8           .. (2 indent ) Starting fluid
  179.9           .. (2 indent ) Priming means
  179.11           ... (3 indent ) Manual pump device or squeeze bulb
  179.12           ... (3 indent ) Condition responsive
  179.13           .... (4 indent ) Temperature
  179.14           .. (2 indent ) Condition responsive
  179.15           ... (3 indent ) Temperature
  179.16           . (1 indent ) With fuel or intake air control
  179.17           .. (2 indent ) Fuel injection pump
  179.18           .. (2 indent ) Intake air control
  179.19           . (1 indent ) Includes auxiliary internal combustion engine
  179.21           . (1 indent ) With charge or cylinder heating
  179.22           . (1 indent ) Inertia type
  179.24           . (1 indent ) Either power or manual starting device
  179.27           . (1 indent ) For airplane
  185.7           .. (2 indent ) Manual type
  179.28           . (1 indent ) With electric generating means
  179.29           .. (2 indent ) Auxiliary magneto
  179.31           . (1 indent ) Having fluid-driven starting motor
  183.1           . (1 indent ) Gunpowder type
  182.1           . (1 indent ) Compression relieving type
  179.25           . (1 indent ) Having specific mounting or drive connection for electric starter motor
  179.26           .. (2 indent ) For nonoperator supporting wheeled platform
  185.1           . (1 indent ) Mechanical
  185.14           .. (2 indent ) Includes mechanical potential motor (e.g., spring motor)
  185.15           ... (3 indent ) Operated by wheels of vehicle
  185.2           .. (2 indent ) Includes cable
  185.3           ... (3 indent ) Including recoil mechanism
  185.4           .... (4 indent ) Lever connected to the cable
  185.5           .. (2 indent ) Includes lever or slide linkage
  185.6           ... (3 indent ) Lever or slide actuates a gear segment
  185.8           .. (2 indent ) Includes friction means in linkage
  185.9           .. (2 indent ) Includes coaxial cooperating threaded members in linkage
  185.11           .. (2 indent ) Includes worm gear in linkage
  185.12           .. (2 indent ) Including crank-type handle
  185.13           ... (3 indent ) Means provided to prevent counter rotation of crank
  184.1           . (1 indent ) With auxiliary igniters
  184.21           INTAKE MANIFOLD
  184.22           . (1 indent ) Passage to crankcase
  184.23           .. (2 indent ) For use with carburetor upstream of manifold
  184.24           .. (2 indent ) Manifold having plenum
  184.25           ... (3 indent ) Plural plenums
  184.26           .... (4 indent ) Interconnection between plenums
  184.27           .. (2 indent ) Multiple passage leading to inlet of head
  184.28           . (1 indent ) For engine having radiating cylinders
  184.29           .. (2 indent ) Star-type engine
  184.31           .. (2 indent ) For V-type engine
  184.32           ... (3 indent ) For use with carburetor upstream of manifold
  184.33           .... (4 indent ) Inlet manifold heated by outlet manifold
  184.34           ... (3 indent ) Manifold having plenum
  184.35           .... (4 indent ) Plural plenums
  184.36           .... (5 indent ) Interconnected between plenums
  184.37           ... (3 indent ) Multiple passage leading to inlet of one cylinder
  184.38           . (1 indent ) For in-line engine
  184.39           .. (2 indent ) For use with carburetor upstream of manifold
  184.41           ... (3 indent ) Intake manifold heated by outlet manifold
  184.42           .. (2 indent ) Manifold having plenum
  184.43           ... (3 indent ) Plural plenums
  184.44           .... (4 indent ) Interconnection between plenums
  184.45           .. (2 indent ) Multiple passage leading to inlet of one cylinder
  184.46           . (1 indent ) For use with carburetor upstream of manifold
  184.47           . (1 indent ) Manifold having plenum
  184.48           .. (2 indent ) Plural plenums
  184.49           ... (3 indent ) Interconnection between plenums
  184.51           .. (2 indent ) Adjustable plenum
  184.52           . (1 indent ) Multiple passage leading to inlet of one cylinder
  184.53           . (1 indent ) Manifold tuning, balancing or pressure regulating means
  184.54           .. (2 indent ) With back flow prevention valve
  184.55           .. (2 indent ) Adjustable length passage
  184.56           .. (2 indent ) Adjustable cross section passage
  184.57           .. (2 indent ) Resonator chamber
  184.58           .. (2 indent ) Return loop to inlet
  184.59           .. (2 indent ) Interconnection between passages
  184.61           . (1 indent ) Manifold material or composition
  142.5R           WITH HEATING MEANS
  142.5E           . (1 indent ) Electric heaters for heating cooling system
  657           COMBUSTION CHAMBER
  658           . (1 indent ) L- or T-shaped
  659           . (1 indent ) Having groove to aid combustion
  660           . (1 indent ) An acoustic cavity used to attenuate detonation shock waves (e.g., Bodine)
  661           . (1 indent ) Having squish area
  662           . (1 indent ) Multiple annular combustion chambers
  663           . (1 indent ) Annular combustion chamber
  664           . (1 indent ) Combustion chamber shape is a figure of revolution
  665           .. (2 indent ) Spherical
  666           .. (2 indent ) Hemispherical
  667           . (1 indent ) Asymmetric combustion chamber
  668           . (1 indent ) Having coating or liner
  669           .. (2 indent ) With means for mounting coating or liner
  670           . (1 indent ) Having catalytic cambustion aid
  671           . (1 indent ) Cylinder head shape conforms to piston shape
  193.1           PARTICULAR PISTON AND ENCLOSING CYLINDER CONSTRUCTION
  193.5           . (1 indent ) Cylinder head
  193.3           .. (2 indent ) Having detail of connection to other cylinder structure
  193.6           . (1 indent ) Piston
  193.4           .. (2 indent ) Having detail to guiding structure cooperating with cylinder
  193.2           . (1 indent ) Cylinder detail
  188.1           VALVE
  189           . (1 indent ) Detachable
  188.14           . (1 indent ) Valve head cooperates with manifold
  188.4           . (1 indent ) Reciprocating valve
  188.15           .. (2 indent ) Shepherd type
  188.2           .. (2 indent ) Poppet
  188.16           ... (3 indent ) Pivoted
  188.3           ... (3 indent ) Material or structure
  188.5           .. (2 indent ) Sleeve
  190.1           . (1 indent ) Rotary
  190.12           .. (2 indent ) Sleeve
  190.13           ... (3 indent ) With lubrication means
  190.3           .. (2 indent ) For crankcase
  190.4           .. (2 indent ) Double function type
  190.5           ... (3 indent ) For two or more cylinders
  190.6           ... (3 indent ) Elongated rotary double-function valve
  190.7           .... (4 indent ) Tapered
  190.8           ... (3 indent ) In horizontal plane above cylinder
  190.9           .... (4 indent ) Tapered
  190.11           ... (3 indent ) In horizontal plane on the side of the cylinder
  190.14           .. (2 indent ) Disc, cone, or sphere shaped
  190.15           ... (3 indent ) Controls plural cylinders
  190.2           .. (2 indent ) Single function, (i.e., exhaust and intake by separate tube)
  190.16           .. (2 indent ) Lubricant
  190.17           .. (2 indent ) Seal
  188.6           . (1 indent ) Packing
  188.7           . (1 indent ) Combustion improving accessory
  188.8           . (1 indent ) Valve seat relation
  188.9           . (1 indent ) Guide, lubricant, or coolant
  188.11           . (1 indent ) Wear feature
  188.12           .. (2 indent ) For spring
  188.13           ... (3 indent ) Including attaching means
  188.17           . (1 indent ) Having actuation springs concentric with valve stem
  195R           FRAME CONSTRUCTION
  195A           . (1 indent ) Auxiliaries, brackets
  195C           . (1 indent ) All covers
  195E           . (1 indent ) Electrical
  195P           . (1 indent ) Outboard motor frames
  195S           . (1 indent ) Sheet metal frames
  195AC           . (1 indent ) Inclined cylinder
  195H           . (1 indent ) Horizontal stress members
  195HC           . (1 indent ) Horizontal cylinder
  196R           LUBRICATORS
  196A           . (1 indent ) Filtering
  196CP           . (1 indent ) Crankcase, pressure control
  196AB           . (1 indent ) Heating and cooling
  196M           . (1 indent ) Upper cylinder lubricants
  196S           . (1 indent ) Safety devices
  196V           . (1 indent ) Sleeve valve lubrication
  196W           . (1 indent ) Vertical shaft
  198R           ACCESSORIES
  198A           . (1 indent ) Decarbonizers and antiknocks
  198B           . (1 indent ) Antitheft valves and locks
  198C           . (1 indent ) Pumps
  198D           . (1 indent ) Safety devices
  198DA           . (1 indent ) Bearing wear, cylinder, oil drain, auto ignition
  198DB           . (1 indent ) Fuel cut-off
  198DC           . (1 indent ) Ignition cut-off control
  198E           . (1 indent ) Covers, trays, vibrators, corrosion inhibitors, air filters
  198F           . (1 indent ) Cylinder cut out
  198P           . (1 indent ) Pressurizing - crankcase, clutch housing, transmission housing
 
 FOREIGN ART COLLECTIONS
 
  FOR000           CLASS-RELATED FOREIGN DOCUMENTS
 Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.
 
             STARTING DEVICE
  FOR100           . (1 indent ) Spark delaying (123/186.1)
  FOR101           SPARK IGNITION TIMING CONTROL (123/406)
  FOR102           . (1 indent ) Vacuum timing control (123/407)
  FOR103           .. (2 indent ) Multiple diaphragms (123/408)
  FOR104           .. (2 indent ) Fluid delay in fluid path line from vacuum source (123/409)
  FOR105           .. (2 indent ) Including sensor responsive to barometric pressure to alter vacuum level (123/410)
  FOR106           .. (2 indent ) Increasing vacuum retards the spark (123/411)
  FOR107           . (1 indent ) Barometric pressure responsive controller (123/412)
  FOR108           . (1 indent ) By mechanical or hydraulic link to throttle valve or accelerator (123/413)
  FOR109           . (1 indent ) Having engine shaft position sensor (123/414)
  FOR110           . (1 indent ) Analog electronic control (123/415)
  FOR111           . (1 indent ) Digital electronic control (123/416)
  FOR112           .. (2 indent ) Having microprocessor (123/417)
  FOR113           . (1 indent ) Speed responsive (123/418)
  FOR114           .. (2 indent ) Responsive to instantaneous changes in engine speed (e.g., roughness) (123/419)
  FOR115           .. (2 indent ) Centrifugal timing mechanism (123/420)
  FOR116           . (1 indent ) Ambient or engine temperature responsive (123/421)
  FOR117           . (1 indent ) Acceleration responsive (123/422)
  FOR118           . (1 indent ) Deceleration responsive (123/423)
  FOR119           . (1 indent ) Starting or cold running condition responsive (123/424)
  FOR120           . (1 indent ) Cylinder pressure or cylinder temperature responsive (123/425)
  FOR121           . (1 indent ) Feedback correction (123/426)
  FOR122           . (1 indent ) Timing control derived from ignition capacitor (123/427)
  FOR123           . (1 indent ) Having circuit that alters response of an oscillatory engine shaft position sensing circuit (123/428)
  FOR124           . (1 indent ) Exhaust gas used with the combustible mixture (e.g., emission control (e.g.r. valve) (123/568)
  FOR125           .. (2 indent ) Diesel engine (123/569)
  FOR126           .. (2 indent ) Exhaust gas cooled before recirculation (123/570)
  FOR127           .. (2 indent ) Electrical control of e.g.r. valve (e.g., between exhaust gas and intake manifold) (123/571)
  FOR128           ... (3 indent ) Having controllable timing means (123/602)
 
 DIGESTS
 
   DIG1           INTERCHANGEABLE
   DIG2           ACCUMULATED FUEL RETURN TO TANK OR ENGINE-INDUCTION SYSTEM
   DIG3           MODEL
   DIG4           STRATIFICATION
   DIG5           CRANKCASE PRESSURE-OPERATED PUMPS
   DIG6           DETACHABLE
   DIG7           CONVERTIBLE
   DIG8           MULTIPLE ENGINE UNITS
   DIG9           FLAME IGNITION
   DIG10           FLUIDIC AMPLIFIER FUEL CONTROL
   DIG11           ANTIDIESELING (STOPPING)
   DIG12           HYDROGEN
   DIG13           GAS


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This data is current as of June/2006