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Control method

  • US 6,082,326 A
  • Filed: 12/04/1998
  • Issued: 07/04/2000
  • Est. Priority Date: 12/05/1997
  • Status: Expired due to Term
First Claim
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1. A control method for controlling the operation of a compression ignition internal combustion engine having an accelerometer associated therewith and arranged to sense vibrations of the engine, and monitor means arranged to monitor the output signal of the accelerometer, the method comprising the steps of monitoring the output signal during a detection time interval and a reference time interval, wherein the reference time interval occurs during a period in which no combustion variations occur, using the output signal during the reference time interval to compensate for background noise, and using the noise compensated signal in controlling the operation of the engine.

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