DIFF Subgroup
F02M 23/08 dependent on pressure in main combustion-air induction system
Introduced: September 1968
Full Title
Apparatus for adding secondary air to fuel-air mixture > with automatic control > dependent on pressure in main combustion-air induction system
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1995.
Child Classifications
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- F02M 23/09 using valves directly opened by low pressure since 1995 +1 CPC IPC+CPC Available in IPC and CPC