Method for controlling valve overlap of a variable...

Details Method for controlling valve overlap of a variable... Method for controlling valve overlap of a variable...

2008-07-01

2008-07-01

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

11424878

ABSTRACT:
A method for controlling valve timing for and engine having adjustable valve timing is presented. In one embodiment, the method allows the intake valve timing to be controlled with respect to exhaust valve timing or the method allows the exhaust valve timing to be controlled with respect to intake valve timing. In addition, the method can bound valve overlap between upper and lower limits so that engine emissions and fuel economy may be improved.

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patent: 2005/0193995 (2005-09-01), Nomura

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