Method of and apparatus for distinguishing engine idling and working hours

  • US 6,735,150 B2
  • Filed: 03/28/2002
  • Issued: 05/11/2004
  • Est. Priority Date: 03/28/2002
  • Status: Active Grant
First Claim
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1. A method of measuring fuel-operated engine running hours, that comprises, monitoring the values of the frequencies corresponding to the engine speed over time, and processing the same to distinguish frequencies representative of either the engine idling periods or of the total period of engine operation, and frequencies representative of engine-working periods, thereby to enable the measurement of engine-working hours.

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