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Method for detecting irregular combustion processes in a multicylinder diesel internal combustion engine

  • US 5,934,256 A
  • Filed: 09/25/1998
  • Issued: 08/10/1999
  • Est. Priority Date: 03/04/1997
  • Status: Expired due to Term
First Claim
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1. A method for detecting irregular combustion processes in a multicylinder diesel internal combustion engine, which comprises:

  • individually recording combustion noises for each cylinder within predeterminable measurement windows through the use of at least one structure-borne noise sensor supplying structure-borne noise signals;

    comparing the individual structure-borne noise signals for a each cylinder with individual threshold values assigned to the cylinders;

    if the threshold values are exceeded, checking if the structure-borne noise signals exceed the threshold values within or outside the measurement windows; and

    inferring incorrect injections of injectors of an injection device when the threshold values outside the measurement windows are exceeded.

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