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Method for detecting knocking

  • US 5,743,233 A
  • Filed: 04/01/1996
  • Issued: 04/28/1998
  • Est. Priority Date: 10/05/1993
  • Status: Expired due to Term
First Claim
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1. A method of detecting knocking of an internal combustion engine, comprising the steps of:

  • specifying a normal range of engine noise for a plurality of operating points of the engine;

    determining when an engine noise deviates from the normal range of engine noise;

    multiplying a knocking threshold by a weighting factor not equal to 1 when the engine noise deviates from the normal range of engine noise;

    sensing a knocking signal; and

    detecting knocking when the sensed knocking signal exceeds the knocking threshold.

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