Electromechanical valve timing during a start
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United States of America Patent
Stats
-
Jun 10, 2008
Grant Date -
Sep 22, 2005
app pub date -
Mar 19, 2004
filing date -
Mar 19, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system and method to control engine valve timing to during the start of an internal combustion engine. Electromechanical valves are controlled in a manner to reduce hydrocarbon emissions during the start of an internal combustion engine. The method controls intake valves so that smaller adjustments are made to cylinder spark advance and air-fuel over a range of operating conditions.
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