Electromechanical valve timing during a start

Details Electromechanical valve timing during a start Electromechanical valve timing during a start

2011-03-08

2011-03-08

Kwon, John T (Department: 3747)

Internal-combustion engines

Engine speed regulator

By changing valve timing

C123S090110

Reexamination Certificate

active

07900598

ABSTRACT:
A method is described for starting an internal combustion engine. During a run-up in engine speed of the engine starting, the method includes adjusting intake valve closing timing in response to barometric pressure to provide a desired air amount in the cylinder, with a longer valve opening with respect to crankshaft angle at higher altitudes as compared to a shorter valve opening with respect to crankshaft angle at lower altitudes for a given operating constraint.

REFERENCES:
patent: 5967113 (1999-10-01), Kaneko et al.
patent: 5992153 (1999-11-01), Tsuchihashi et al.
patent: 6227182 (2001-05-01), Muraki et al.
patent: 7717071 (2010-05-01), Lewis et al.
patent: 2001/0045210 (2001-11-01), Itoyama

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