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...

2005-06-07

2005-06-07

Nguyen, Tu M. (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Cam

C123S090150, C123S090160

Reexamination Certificate

active

06901897

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.

REFERENCES:
patent: 2344993 (1944-03-01), Lysholm
patent: 3574304 (1971-04-01), Santi
patent: 4084568 (1978-04-01), Sato et al.
patent: 4538559 (1985-09-01), Imamura et al.
patent: 4852527 (1989-08-01), Beardmore et al.
patent: 5927238 (1999-07-01), Watson
patent: 6055949 (2000-05-01), Nakamura et al.
patent: 6125828 (2000-10-01), Hu

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