KNOCK DETECTION DEVICE OF INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Aug 1, 2013
app pub date -
Sep 12, 2012
filing date -
Feb 1, 2012
priority date (Note) -
Abandoned
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Abstract
In order to obtain a knock detection device of an internal combustion engine which satisfies two objects of following capability and separation from a continuous knock generation state, when a background level is calculated by ((current background level)=(filter coefficient)×(previous background level)+(1−filter coefficient)×(output signal from knock sensor)), updating quantity of the background level is limited by ((1−filter coefficient)×(value not lower than maximum value of output signal from knock sensor at time when knock is not generated)).
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