Transitory torque modifications using skip fire control
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United States of America Patent
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Sep 1, 2015
Grant Date -
Feb 13, 2014
app pub date -
Aug 9, 2013
filing date -
Aug 10, 2012
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Abstract
Methods and devices are described that utilize skip fire techniques to rapidly meet requests for transitory changes in the output of an engine. Specifically, the fraction or percentage of the working cycles that are fired can be changed during a transitory event so that the engine delivers the desired transitory engine output. Once the transitory event is over, normal engine operation may be restored. The described techniques are useful in a variety of applications that require a relatively quick, but transitory, reduction in engine output to meet vehicle control requirements. One particularly useful application is during transmission shift events. Other representative applications include: loss of traction events, stability control events, wheel hop prevention events, etc.
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