Cooperative Patent Classification

CPC Definition - Subclass F01P

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Last Updated Version: 2016.11
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)
Definition statement

This place covers:

Cooling of machines, where "machine" means a device which could equally be an engine and a pump, and not a device which is restricted to an engine or one which is restricted to a pump.

Cooling of engines, where "engine" means a device for continuously converting fluid energy into mechanical power, e.g. steam piston engines or steam turbines.

Cooling of internal combustion engines.

References
Limiting references

This place does not cover:

Cooling of machine tools

Arrangements in connection with cooling of propulsion units in vehicles

Heat-exchange or heat-storage materials

Cooling of gas-turbine engines

Profiting from the waste heat of the exhaust gases

Cogeneration

Heat exchange in general, radiators

Cooling of electric machines

Informative references

Attention is drawn to the following places, which may be of interest for search:

Cooling by lubricant when the lubrication aspect predominates

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Air

gaseous cooling fluids

Liquid cooling

includes also cooling where liquid is used as the heat transferring fluid between parts to be cooled and the air, e.g. using radiators

Air cooling

direct air cooling and thus excludes indirect air cooling occurring in liquid cooling systems as explained herefore

Cooling air

directly or indirectly acting air for cooling

Engine

device for continuously converting fluid energy into mechanical power. Thus, this term includes, for example, steam piston engines or steam turbines, per se, or internal-combustion piston engines, but it excludes single-stroke devices. "Engine" also includes the fluid-motive portion of a meter unless such portion is particularly adapted for use in a meter

Machine

device which could equally be an engine and a pump, and not a device which is restricted to an engine or one which is restricted to a pump

Air cooling
Definition statement

This place covers:

Air cooling of the engine parts as cylinders or cylinder heads, but also cooling of the engine room, when related to the engine cooling circuit.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

For the engine room cooling

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Engine

an internal combustion engine

Liquid cooling
Definition statement

This place covers:

Arrangements for liquid cooling of engine or machine parts.

References
Limiting references

This place does not cover:

Control details of the circuit

Arrangement of the radiator in the vehicle

Piston constructional details related to cooling of the pistons

Layout of the radiator

Informative references

Attention is drawn to the following places, which may be of interest for search:

Heating of the vehicle cabin from the coolant as such

Intercooler arrangement

Profiting from waste heat of the exhaust gases

EGR cooling as such

Special rules of classification

Cooling circuit specific details related to cabin heater, intercooler, EGR, turbo- charger, retarder, fuel cooling, battery and hybrid vehicles are classified in F01P 3/20 and under F01P 2060/00.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

EGR

Exhaust Gas Recirculation

Pumping cooling-air or liquid coolants (controlling circulation or supply of coolants by influencing drive of pumps F01P 7/00)
Definition statement

This place covers:

Arrangements related to water pumps and fans including their driving, as long a cooling circuit of an engine is claimed as well.

References
Limiting references

This place does not cover:

Controlling circulation or supply of coolants by influencing drive of pumps

Driving the pumps using a clutch

Centrifugal pumps

Axial flow fans

Rotors for centrifugal pumps

Rotors for elastic fluids

Informative references

Attention is drawn to the following places, which may be of interest for search:

Casings

Controlling of coolant flow
Definition statement

This place covers:

Controlling of the system such that the coolant and/or an engine part has a given temperature and/or in accordance with certain engine parameters, e.g. speed, load.

References
Limiting references

This place does not cover:

Failure of thermostats

Arrangement and control of the radiator shutters related to the vehicle

Heating of an ICE before starting by heating of the coolant

The layout of a thermostat, when not related to an ice

Thermostat as such

Informative references

Attention is drawn to the following places, which may be of interest for search:

Cooling after the engine stop

Heating and cooling of the vehicle in general

Friction clutches in genera

Valves in general

Field thermostats

Special rules of classification

F01P 7/165 includes systems where besides the main loop and bypass-loop, other loops present, e.g. a low temperature loop.

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)
References
Limiting references

This place does not cover:

Profiting from the waste heat of the exhaust gases

Cogeneration

Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P 1/00 - F01P 9/00
Definition statement

This place covers:

Venting, overflow, deaeration, filling of the circuit, expansion reservoirs, reservoir caps, draining and purging, indicating and safety devices, filtration and silencing of the cooling air and also regenerative heat accumulators.

References
Limiting references

This place does not cover:

Arrangement of the radiator in the vehicle

Informative references

Attention is drawn to the following places, which may be of interest for search:

Using heat accumulators

Special rules of classification

When the deaeration devices, venting devices are mounted on the expansion reservoir they are classified in F01P 11/029.

When the deaeration devices, venting devices are mounted on the closure caps they are classified in F01P 11/0204.