1. CPC Sections
  2. CPC Section F
  3. CPC Class F01
  4. CPC Subclass F01P
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
F01P
COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K 11/00; heat-transfer, heat-exchange or heat-storage materials C09K 5/00; {cooling of gas-turbine engines F02C 7/12}; heat exchange in general, radiators F28) [2018-08]
NOTES

  • In this subclass, the following terms or expressions are used with the meanings indicated:
    • "air" also includes other gaseous cooling fluids;
    • "liquid cooling" also includes cooling where liquid is used as the heat transferring fluid between parts to be cooled and the air, e.g. using radiators;
    • "air cooling" means direct air cooling and thus excludes indirect air cooling occurring in liquid cooling systems as explained herefore;
    • "cooling-air" includes directly or indirectly acting cooling-air.
  • Attention is drawn to the notes preceding class F01, especially as regards Note (3).
  • Cooling by lubricant is classified in subclass F01M when the lubrication aspect predominates and in subclass F01P when the cooling aspect predominates.
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
Air cooling; Liquid cooling (propelling cooling-air or liquid coolants F01P 5/00; controlling supply or circulation of coolants F01P 7/00; cylinders, pistons, valves, fuel injectors, sparking-plugs, or other engine or machine parts, modified to facilitate cooling, see the relevant classes for such parts) [2013-01]
F01P 1/00
Air cooling [2013-01]
F01P 2001/005
.
{Cooling engine rooms} [2013-01]
F01P 1/02
.
Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders [2013-01]
F01P 2001/023
. .
{Cooling cylinders (F01P 2003/022 takes precedence)} [2013-01]
F01P 2001/026
. .
{Cooling cylinder heads (F01P 2003/025 takes precedence)} [2013-01]
F01P 1/04
.
Arrangements for cooling pistons [2013-01]
F01P 1/06
.
Arrangements for cooling other engine or machine parts [2013-01]
F01P 1/08
. .
for cooling intake or exhaust valves [2013-01]
F01P 1/10
. .
for cooling fuel injectors or sparking-plugs [2013-01]
F01P 3/00
Liquid cooling [2013-01]
F01P 2003/001
.
{Cooling liquid} [2013-01]
F01P 2003/003
. .
{having boiling-point higher than 100°C} [2013-01]
F01P 2003/005
.
{the liquid being fuel} [2013-01]
F01P 2003/006
.
{the liquid being oil} [2013-01]
F01P 2003/008
.
{the liquid being water and oil} [2013-01]
F01P 3/02
.
Arrangements for cooling cylinders or cylinder heads [2013-01]
F01P 2003/021
. .
{Cooling cylinders} [2013-01]
F01P 2003/022
. . .
{combined with air cooling} [2013-01]
F01P 2003/024
. .
{Cooling cylinder heads} [2013-01]
F01P 2003/025
. . .
{combined with air cooling} [2013-01]
F01P 2003/027
. .
{Cooling cylinders and cylinder heads in parallel} [2013-01]
F01P 2003/028
. .
{Cooling cylinders and cylinder heads in series} [2013-01]
F01P 3/04
. .
Liquid-to-air heat-exchangers combined with, or arranged on, cylinders or cylinder heads [2013-01]
F01P 3/06
.
Arrangements for cooling pistons [2013-01]
F01P 3/08
. .
Cooling of piston exterior only, e.g. by jets [2013-01]
F01P 3/10
. .
Cooling by flow of coolant through pistons [2013-01]
F01P 3/12
.
Arrangements for cooling other engine or machine parts [2013-01]
F01P 3/14
. .
for cooling intake or exhaust valves [2013-01]
F01P 3/16
. .
for cooling fuel injectors or sparking-plugs [2013-01]
F01P 3/18
.
Arrangements or mounting of liquid-to-air heat-exchangers (such arrangements on cylinders or cylinder heads F01P 3/04; relative to vehicles B60K 11/04) [2013-01]
F01P 2003/182
. .
{with multiple heat-exchangers} [2013-01]
F01P 2003/185
. .
{arranged in parallel} [2013-01]
F01P 2003/187
. .
{arranged in series} [2013-01]
F01P 3/20
.
Cooling circuits not specific to a single part of engine or machine (F01P 3/22 takes precedence) [2013-01]
F01P 3/202
. .
{for outboard marine engines} [2013-01]
F01P 3/205
. . .
{Flushing} [2013-01]
F01P 3/207
. .
{liquid-to-liquid heat-exchanging relative to marine vessels} [2013-01]
F01P 3/22
.
characterised by evaporation and condensation of coolant in closed cycles (other cooling by evaporation F01P 9/02); characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point [2013-01]
F01P 3/2207
. .
{characterised by the coolant reaching temperatures higher than the normal atmospheric boiling point} [2013-01]
F01P 2003/2214
. .
{Condensers} [2013-01]
F01P 2003/2221
. . .
{of the horizontal type} [2013-01]
F01P 2003/2228
. . .
{of the upflow type} [2013-01]
F01P 2003/2235
. . .
{of the downflow type} [2013-01]
F01P 2003/2242
. . .
{Steam-to-steam condensers} [2013-01]
F01P 2003/225
. . .
{Steam-to-liquid condensers} [2013-01]
F01P 2003/2257
. . .
{Rotating condensers} [2013-01]
F01P 2003/2264
. . .
{Separators} [2013-01]
F01P 3/2271
. .
{Closed cycles with separator and liquid return} [2013-01]
F01P 2003/2278
. .
{Heat pipes} [2013-01]
F01P 3/2285
. .
{Closed cycles with condenser and feed pump} [2013-01]
F01P 2003/2292
. .
{with thermostatically controlled by-pass} [2013-01]
Pumping cooling-air or liquid coolants; Controlling circulation or supply of coolants [2013-01]
F01P 5/00
Pumping cooling-air or liquid coolants (controlling circulation or supply of coolants by influencing drive of pumps F01P 7/00) [2013-01]
F01P 5/02
.
Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers [2013-01]
F01P 2005/025
. .
{using two or more air pumps} [2013-01]
F01P 5/04
. .
Pump-driving arrangements [2013-01]
F01P 5/043
. . .
{Pump reversing arrangements} [2013-01]
F01P 2005/046
. . .
{with electrical pump drive} [2013-01]
F01P 5/06
. .
Guiding or ducting air to, or from, ducted fans [2013-01]
F01P 5/08
. .
Use of engine exhaust gases for pumping cooling-air [2013-01]
F01P 5/10
.
Pumping liquid coolant; Arrangements of coolant pumps [2013-01]
F01P 2005/105
. .
{Using two or more pumps} [2013-01]
F01P 5/12
. .
Pump-driving arrangements [2013-01]
F01P 2005/125
. . .
{Driving auxiliary pumps electrically} [2013-01]
F01P 5/14
.
Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps [2017-08]
F01P 7/00
Controlling of coolant flow [2013-01]
F01P 7/02
.
the coolant being cooling-air [2013-01]
F01P 7/023
. .
{Cowlings for airplane engines} [2013-01]
F01P 7/026
. .
{Thermostatic control} [2013-01]
F01P 7/04
. .
by varying pump speed, e.g. by changing pump-drive gear ratio [2013-01]
F01P 7/042
. . .
{using fluid couplings (couplings or clutches of this type per se F16D 35/00)} [2013-01]
F01P 7/044
. . .
{using hydraulic drives} [2013-01]
F01P 7/046
. . .
{using mechanical drives} [2013-01]
F01P 7/048
. . .
{using electrical drives} [2013-01]
F01P 7/06
. .
by varying blade pitch [2013-01]
F01P 7/08
. .
by cutting in or out of pumps [2013-01]
F01P 7/081
. . .
{using clutches, e.g. electro-magnetic or induction clutches} [2013-01]
F01P 7/082
. . . .
{using friction clutches} [2013-01]
F01P 7/084
. . . . .
{actuated electromagnetically} [2013-01]
F01P 7/085
. . . . .
{actuated by fluid pressure} [2013-01]
F01P 7/087
. . . . .
{actuated directly by deformation of a thermostatic device} [2013-01]
F01P 7/088
. . . . .
{actuated in response to driving speed, e.g. by centrifugal devices} [2013-01]
F01P 7/10
. .
by throttling amount of air flowing through liquid-to-air heat exchangers [2013-01]
F01P 7/12
. . .
by thermostatic control [2013-01]
F01P 7/14
.
the coolant being liquid [2013-01]
F01P 2007/143
. .
{using restrictions} [2013-01]
F01P 2007/146
. .
{using valves} [2013-01]
F01P 7/16
. .
by thermostatic control [2013-01]
F01P 7/161
. . .
{by bypassing pumps} [2013-01]
F01P 7/162
. . .
{by cutting in and out of pumps} [2013-01]
F01P 7/164
. . .
{by varying pump speed} [2013-01]
F01P 7/165
. . .
{characterised by systems with two or more loops} [2013-01]
F01P 7/167
. . .
{by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed} [2013-01]
F01P 2007/168
. . .
{By varying the cooling capacity of a liquid-to-air heat-exchanger} [2013-01]
F01P 9/00
Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P 1/00 - F01P 7/00 (profiting from waste heat of combustion-engine cooling F02G 5/00) [2016-05]
F01P 2009/005
.
{Cooling with melting solids} [2013-01]
F01P 9/02
.
Cooling by evaporation, e.g. by spraying water on to cylinders (evaporation and condensation of liquid coolant in closed cycles F01P 3/22 {; evaporation or evaporation apparatus for physical or chemical purposes, e.g. evaporation of liquids for gas phase reactions B01B 1/005}) [2017-08]
F01P 9/04
.
by simultaneous or alternative use of direct air-cooling and liquid cooling (F01P 9/02 takes precedence) [2013-01]
F01P 9/06
.
by use of refrigerating apparatus, e.g. of compressor or absorber type [2013-01]
F01P 11/00
Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P 1/00 - F01P 9/00 [2016-05]
F01P 11/02
.
Liquid-coolant {filling}, overflow, venting, or draining devices (automatic draining during freezing conditions F01P 11/20) [2013-01]
F01P 11/0204
. .
{Filling} [2013-01]
F01P 11/0209
. . .
{Closure caps} [2013-01]
F01P 11/0214
. . . .
{Mounting} [2013-01]
F01P 2011/0219
. . . . .
{using bayonet connections} [2013-01]
F01P 2011/0223
. . . . .
{Decoration} [2013-01]
F01P 2011/0228
. . . . .
{Sealing} [2013-01]
F01P 2011/0233
. . . . .
{Venting} [2013-01]
F01P 11/0238
. . . .
{with overpressure valves or vent valves} [2013-01]
F01P 2011/0242
. . . . .
{setting the pressure valve} [2013-01]
F01P 11/0247
. . . .
{Safety; Locking against opening} [2013-01]
F01P 2011/0252
. . . . .
{Venting before opening} [2013-01]
F01P 2011/0257
. . . . .
{with theft preventing means} [2013-01]
F01P 2011/0261
. . . . .
{activated by temperature} [2013-01]
F01P 2011/0266
. . . . .
{activated by pressure} [2013-01]
F01P 2011/0271
. . . .
{Semi-permeable, e.g. using Gore-Tex c fibres} [2013-01]
F01P 11/0276
. .
{Draining or purging} [2013-01]
F01P 11/028
. .
{Deaeration devices} [2013-01]
F01P 11/0285
. .
{Venting devices} [2013-01]
F01P 11/029
. .
{Expansion reservoirs} [2013-01]
F01P 11/0295
. .
{Condensers for radiators} [2013-01]
F01P 11/04
.
Arrangements of liquid pipes or hoses [2013-01]
F01P 11/06
.
Cleaning (in general B08B); Combating corrosion (in general C23F) [2013-01]
F01P 2011/061
. .
{Cleaning or combating corrosion using filters} [2017-05]
F01P 2011/063
. .
{Cleaning (F01P 2011/061 takes precedence)} [2013-01]
F01P 2011/065
. .
{Flushing} [2013-01]
F01P 2011/066
. .
{Combating corrosion (F01P 2011/061 takes precedence)} [2017-05]
F01P 2011/068
. . .
{chemically} [2013-01]
F01P 11/08
.
Arrangements of lubricant coolers (in lubrication apparatus F01M) [2013-01]
F01P 11/10
.
Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers [2013-01]
F01P 11/12
.
Filtering, cooling, or silencing cooling-air [2013-01]
F01P 11/14
.
Indicating devices; Other safety devices [2013-01]
F01P 11/16
. .
concerning coolant temperature (F01P 11/20 takes precedence) [2013-01]
F01P 11/18
. .
concerning coolant pressure, coolant flow, or liquid-coolant level [2013-01]
F01P 11/20
. .
concerning atmospheric freezing conditions, e.g. automatically draining or heating during frosty weather [2013-01]
F01P 2011/205
. .
{using heat-accumulators} [2013-01]
F01P 2023/00
Signal processing; Details thereof [2013-01]
F01P 2023/08
.
Microprocessor; Microcomputer [2013-01]
Air cooling; Liquid cooling (propelling cooling-air or liquid coolants F01P 5/00; controlling supply or circulation of coolants F01P 7/00; cylinders, pistons, valves, fuel injectors, sparking-plugs, or other engine or machine parts, modified to facilitate cooling, see the relevant classes for such parts) [2013-01]
F01P 2025/00
Measuring [2013-01]
F01P 2025/04
.
Pressure [2013-01]
F01P 2025/06
. .
for determining flow [2013-01]
F01P 2025/08
.
Temperature [2013-01]
F01P 2025/12
. .
Cabin temperature [2013-01]
F01P 2025/13
. .
Ambient temperature [2013-01]
F01P 2025/30
. .
Engine incoming fluid temperature [2013-01]
F01P 2025/31
. .
Cylinder temperature [2013-01]
F01P 2025/32
. .
Engine outcoming fluid temperature [2013-01]
F01P 2025/33
. .
Cylinder head temperature [2013-01]
F01P 2025/34
. .
Heat exchanger incoming fluid temperature [2013-01]
F01P 2025/36
. .
Heat exchanger mixed fluid temperature [2013-01]
F01P 2025/40
. .
Oil temperature [2013-01]
F01P 2025/42
. .
Intake manifold temperature [2013-01]
F01P 2025/44
. .
Outlet manifold temperature [2013-01]
F01P 2025/46
. .
Engine parts temperature [2013-01]
F01P 2025/48
. .
Engine room temperature [2013-01]
F01P 2025/50
. .
using two or more temperature sensors [2013-01]
F01P 2025/52
. .
Heat exchanger temperature [2013-01]
F01P 2025/60
.
Operating parameters [2013-01]
F01P 2025/62
. .
Load [2013-01]
F01P 2025/64
. .
Number of revolutions [2013-01]
F01P 2025/66
. .
Vehicle speed [2013-01]
F01P 2025/70
.
Level [2013-01]
F01P 2025/80
.
Concentration anti-freeze [2013-01]
F01P 2031/00
Fail safe [2013-01]
F01P 2031/16
.
using melting materials [2013-01]
F01P 2031/18
.
Detecting fluid leaks [2013-01]
F01P 2031/20
.
Warning devices [2013-01]
F01P 2031/22
.
using warning lamps [2013-01]
F01P 2031/24
.
for freezing [2013-01]
F01P 2031/30
.
Cooling after the engine is stopped [2013-01]
F01P 2031/32
.
Deblocking of damaged thermostat [2013-01]
F01P 2031/34
.
Limping home [2013-01]
F01P 2031/36
.
Failure of coolant pump [2013-01]
F01P 2037/00
Controlling [2013-01]
F01P 2037/02
.
starting [2013-01]
F01P 2050/00
Applications [2013-01]
F01P 2050/02
.
Marine engines [2013-01]
F01P 2050/04
. .
using direct cooling [2013-01]
F01P 2050/06
. .
using liquid-to-liquid heat exchangers [2013-01]
F01P 2050/08
. .
Engine room [2013-01]
F01P 2050/10
. .
Z-type engine [2013-01]
F01P 2050/12
. .
Outboard engine [2013-01]
F01P 2050/16
.
Motor-cycles [2013-01]
F01P 2050/20
.
Aircraft engines [2013-01]
F01P 2050/22
.
Motor-cars [2013-01]
F01P 2050/24
.
Hybrid vehicles [2013-01]
F01P 2050/30
.
Circuit boards [2013-01]
F01P 2060/00
Cooling circuits using auxiliaries [2013-01]
F01P 2060/02
.
Intercooler [2013-01]
F01P 2060/04
.
Lubricant cooler [2013-01]
F01P 2060/045
. .
for transmissions [2013-01]
F01P 2060/06
.
Retarder [2013-01]
F01P 2060/08
.
Cabin heater [2013-01]
F01P 2060/10
.
Fuel manifold [2013-01]
F01P 2060/12
.
Turbo charger [2013-01]
F01P 2060/14
.
Condenser [2013-01]
F01P 2060/16
.
Outlet manifold [2013-01]
F01P 2060/18
.
Heater [2013-01]
F01P 2060/185
. .
for alternators or generators [2013-01]
F01P 2070/00
Details [2013-01]
F01P 2070/02
.
using shape memory alloys [2013-01]
F01P 2070/04
.
using electrical heating elements [2013-01]
F01P 2070/06
.
Using intake pressure as actuating fluid [2013-01]
F01P 2070/08
.
Using lubricant pressure as actuating fluid [2013-01]
F01P 2070/10
.
using electrical or electromechanical means [2013-01]
F01P 2070/30
.
Rotating radiators [2013-01]
F01P 2070/32
.
Ring-shaped heat exchangers [2013-01]
F01P 2070/50
.
mounting fans to heat-exchangers [2013-01]
F01P 2070/52
.
mounting heat-exchangers [2013-01]