Engine and exhaust heating
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United States of America Patent
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-
Feb 21, 2012
Grant Date -
Sep 22, 2011
app pub date -
May 31, 2011
filing date -
Nov 6, 2008
priority date (Note) -
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Abstract
A method for controlling a vehicle engine having a plurality of cylinders is provided. The method comprises: during engine idling, advancing spark timing of at least one cylinder to before a peak torque timing, and retarding spark timing from the advanced timing toward the peak torque timing in response to decreased engine speed to maintain idling speed.
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