Two cycle diesel engine

Details Two cycle diesel engine Two cycle diesel engine

1990-09-28

1993-01-12

Cross, E. Rollins

Internal-combustion engines

Two-cycle

Rear compression

123 65V, 123 73C, F02B 2520

Patent

active

051781042

ABSTRACT:
A diesel engine operating on the two cycle crankcase compression principle and having a means for reducing nitrous oxide emissions under low and medium range speeds. This is done by throttling the scavenge air flow which can be accomplished either by throttling the air admitted to the crankcase chamber or bypassing a portion of the compressed air from the crankcase chamber back to the induction system. In addition, an exhaust control valve is provided for raising the compression ratio and the injection timing is advanced when the scavenge air is reduced so as to further improve the control of hydrocarbon and carbon monoxide emissions.

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