Method and system for pre-ignition control
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United States of America Patent
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Sep 12, 2017
Grant Date -
Feb 23, 2017
app pub date -
Aug 21, 2015
filing date -
Aug 21, 2015
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Abstract
Methods and systems are provided for improving the detection and mitigation of high speed pre-ignition. In one example, high speed pre-ignition is detected based on concurrent or sequential changes in an integrated knock sensor output in a knock window as well as a pre-ignition window. The high speed pre-ignition is addressed using cylinder fuel deactivation and/or engine load limiting to reduce the risk for run-away pre-ignition.
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