IPC Main Group
F02D 15/00 Varying compression ratio
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- Subclass:
- CONTROLLING COMBUSTION ENGINES
2 direct subcodes
Child Classifications
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- F02D 15/02 by alteration or displacement of piston stroke
- F02D 15/04 by alteration of volume of compression space without changing piston stroke