Method and intake cam for retaining exhaust residuals for...

Details Method and intake cam for retaining exhaust residuals for... Method and intake cam for retaining exhaust residuals for...

2004-08-05

2010-10-26

Nguyen, Tu M (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Cam

C060S274000, C060S278000, C123S090150, C123S090170, C123S568140

Reexamination Certificate

active

07819101

ABSTRACT:
A diesel engine intake cam profile creates two intake valve events separated by a short dwell period each engine cycle. A relatively low valve lift during an engine exhaust event allows a portion of the exhaust gas to flow into an intake manifold and mix with intake air. The intake valve is then nearly closed for a dwell period until a normal intake valve opening occurs, drawing the mixture of air and exhaust gas back into the combustion chamber for compression and burning, upon closure of the intake valves.

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