Device and method for controlling variable valve timing of internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 17, 2004
Grant Date -
May 30, 2002
app pub date -
Nov 21, 2001
filing date -
Nov 29, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The reference valve timing for an intake valve and an exhaust valve are set based on operating conditions such as an engine load, an engine rotation speed and the like. A cold state of the engine is detected, and when an air-fuel ratio is set to lean during the cold state, the valve timing of the intake and exhaust valves are controlled so that the opening timing of the exhaust valve is retarded with respect to the reference valve timing while reducing a valve overlap amount.
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