Patent Classification Explorer PCE

DIFF Subgroup

F02D 13/02

during engine operation

Introduced: September 1968

Full Title

Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing > during engine operation

CPC subdivides this area 7x more granularly than IPC with 12 additional codes.

12 codes are CPC-only extensions.

Child Classifications

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F02D 13/0203 +2 CPC CPC only CPC only
F02D 13/0223 +2 CPC CPC only CPC only
F02D 13/0242 +2 CPC CPC only CPC only
F02D 13/0253 CPC only CPC only
F02D 13/0257 CPC only CPC only
F02D 13/0261 +1 CPC CPC only CPC only
F02D 13/0269 CPC only CPC only
F02D 13/0273 CPC only CPC only
F02D 13/0276 CPC only CPC only
F02D 13/028 +1 CPC CPC only CPC only
F02D 13/04 using engine as brake IPC+CPC Available in IPC and CPC
F02D 13/06 Cutting-out cylinders IPC+CPC Available in IPC and CPC
F02D 2013/0292 2nd only CPC only CPC only
F02D 2013/0296 2nd only CPC only CPC only