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Method of avoiding low cycle fatigue failure of turbochargers

  • US 6,163,254 A
  • Filed: 11/23/1999
  • Issued: 12/19/2000
  • Est. Priority Date: 11/23/1999
  • Status: Active Grant
First Claim
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1. A method of avoiding low cycle fatigue failure of a turbocharger for an internal combustion engine having an electronic control module comprising the steps of:

  • counting the number of cycles the speed of the turbocharger exceeds a high predetermined speed for a period of time and then drops below a lower predetermined speed for a period of time;

    determining an allowable number of said speed cycles that the turbocharger can experience without low cycle fatigue failure;

    comparing the counted number of speed cycles to the allowed number of speed cycles; and

    providing a signal that will alert an operator that the turbocharger is approaching low cycle fatigue failure.

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