Engine valve actuation system and method for controlling...

Details Engine valve actuation system and method for controlling... Engine valve actuation system and method for controlling...

2006-05-23

2006-05-23

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090170

Reexamination Certificate

active

07047920

ABSTRACT:
The present invention provides a method and apparatus for controlling an intake engine valve capable of variable closing timing. A condition indicative of white smoke production is determined. An intake engine valve is closed at a first crank angle for a given engine operating condition when the condition indicative of white smoke production does not exist. The intake valve is closed at a second crank angle for the given engine operating condition when the condition indicative of white smoke production exists. The second crank angle is less than the first crank angle.

REFERENCES:
patent: 5303168 (1994-04-01), Cullen et al.
patent: 6045482 (2000-04-01), Nishar et al.
patent: 6237551 (2001-05-01), Macor et al.
patent: 6484676 (2002-11-01), Shimizu et al.
patent: 2003/0183185 (2003-10-01), Sun et al.

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