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Abnormal combustion detection and vibration reduction system

  • US 5,186,136 A
  • Filed: 08/19/1991
  • Issued: 02/16/1993
  • Est. Priority Date: 08/28/1990
  • Status: Expired due to Term
First Claim
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1. An apparatus for detecting abnormal combustion in an internal combustion engine, comprising:

  • means for detecting the rotation of the internal combustion engine;

    means for calculating rotation angular acceleration on the basis of the detected rotation;

    means for comparing the rotation angular acceleration at the position of a predetermined crank angle in one cycle of the operation of the internal combustion engine with a predetermined reference value; and

    means for judging from the comparison result in the comparing means whether or not abnormal combustion occurs in the internal combustion engine.

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