combustion-air or fuel-air mixture (electrically F02M31/12; by using heat from working cylinders or cylinder heads F02M31/14; heating of combustion-air as an engine starting aid F02N7/04)

Introduced: September 1968

Title

Titles differ between systems:

IPC: combustion-air or fuel-air mixture

CPC: combustion-air or fuel-air mixture (electrically F02M31/12; by using heat from working cylinders or cylinder heads F02M31/14; heating of combustion-air as an engine starting aid F02N7/04)

Full Title

Full titles differ between systems:

IPC:

Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture > for heating > combustion-air or fuel-air mixture

CPC:

Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture (carburettors with heating, cooling or thermal insulating means for combustion-air, fuel or fuel-air mixture F02M15/00; apparatus for de-liquefying non-liquid fuels by heating F02M21/06; apparatus having heating means for non-gaseous fuels with low melting point F02M21/10; apparatus characterised by adding hot secondary air to fuel-air mixture F02M23/14; fuel-injection apparatus characterised by having heating, cooling or thermally insulating means F02M53/00) > for heating ( for purifying liquid fuel F02M37/30) > combustion-air or fuel-air mixture (electrically F02M31/12; by using heat from working cylinders or cylinder heads F02M31/14; heating of combustion-air as an engine starting aid F02N7/04)

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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F02M 31/042 CPC only CPC only
F02M 31/045 +1 CPC CPC only CPC only
F02M 31/06 by hot gases, e.g. by mixing cold and hot air +4 CPC IPC+CPC Available in IPC and CPC
F02M 31/10 by hot liquids, e.g. lubricants +3 CPC IPC+CPC Available in IPC and CPC