Method and system for pre-ignition control
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United States of America Patent
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Jan 24, 2017
Grant Date -
Jan 2, 2014
app pub date -
Jun 29, 2012
filing date -
Jun 29, 2012
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Abstract
Methods and systems are provided for reducing late burn induced cylinder pre-ignition events. Forced entry of residuals from a late burning cylinder into a neighboring cylinder may be detected based on engine block vibrations sensed in a window during an open exhaust valve of the late burning cylinder. In response to the entry of residuals, a pre-ignition mitigating action, such as fuel enrichment or deactivation, is performed in the neighboring cylinder.
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