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Knock detecting apparatus for internal combustion engine

  • US 7,243,529 B2
  • Filed: 06/14/2004
  • Issued: 07/17/2007
  • Est. Priority Date: 07/03/2003
  • Status: Active Grant
First Claim
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1. A knock detecting apparatus for an internal combustion engine, comprising:

  • a combustion condition detecting means for outputting a waveform signal indicative of a combustion condition of the engine;

    a calculating means for calculating an ideal reference knock waveform, anda knock determining means for evaluating a relation between the waveform signal and the ideal reference knock waveform to determine an engine knock by comparing the waveform signal with the ideal reference knock waveform during a specified period for a plurality of specified periods, whereinthe calculating means calculates the ideal reference knock waveform on the basis of a factor depending on a crank angle and a factor depending on a real time.

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