US PATENT SUBCLASS 123 / 258
.~ Having timed valves to precombustion and main combustion chambers

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

253  DF  PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES {22}
258.~ Having timed valves to precombustion and main combustion chambers

DEFINITION

Classification: 123/258

Having timed valves to precombustion and main combustion chambers:

(under subclass 253) Subject matter in which the main and prechamber each have at least one intake valve, with significance attributed to the relative valve timing.