Control of the pumps

Introduced: January 1980

Full Title

Engines characterised by provision of pumps driven at least for part of the time by exhaust > Control of the pumps

Of 8 combined children, 6 exist in both systems.

2 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

2 shared codes have differing titles between IPC and CPC.

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F02B 2037/122 2nd only CPC only CPC only
F02B 2037/125 2nd only CPC only CPC only
F02B 37/14 of the alternation between exhaust drive and other drive of a pump, e.g. dependent on speed since 1980 IPC+CPC Available in IPC and CPC
F02B 37/16 by bypassing charging air since 1995 +3 CPC IPC+CPC Available in IPC and CPC
F02B 37/18 by bypassing exhaust since 1995 +1 CPC IPC+CPC Available in IPC and CPC
F02B 37/20 by increasing exhaust energy, e.g. using combustion chamber since 1995 IPC+CPC Available in IPC and CPC
F02B 37/22 by varying cross-section of exhaust passages or air passages (F02B37/24 takes precedence) since 1995 +1 CPC IPC+CPC Available in IPC and CPC
F02B 37/24 by using pumps or turbines with adjustable guide vanes since 1995 IPC+CPC Available in IPC and CPC

Class F02,2013–2023, worldwide · Source: EPO PATSTAT

Class F02,2013–2023, worldwide · Source: EPO PATSTAT