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METHOD FOR DETECTING COMBUSTION NOISE IN INTERNAL COMBUSTION ENGINE, COMBUSTION NOISE DETECTION DEVICE, AND DEVICE FOR CONTROLLING INTERNAL COMBUSTION ENGINE

  • US 20140172280A1
  • Filed: 07/26/2012
  • Published: 06/19/2014
  • Est. Priority Date: 07/28/2011
  • Status: Active Grant
First Claim
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1. A method for detecting a combustion noise in an internal combustion engine for use in a control device that computes a comparative magnitude of a combustion noise by frequency analysis processing on a frequency signal from a combustion noise sensor that detects a combustion noise in a combustion chamber of the internal combustion engine as a frequency output, the method characterized in that the control device(1) identifies a combustion mode taking place in the combustion chamber, which is set depending on running condition, and selects a proper sensed frequency of the combustion noise sensor for the combustion mode;

  • and(2) computes a comparative magnitude of a combustion noise specific to the combustion mode taking place in the combustion chamber by frequency analysis processing on the selected sensed frequency output.

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