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Arrangement for monitoring rotational speed sensor

  • US 5,197,326 A
  • Filed: 05/24/1991
  • Issued: 03/30/1993
  • Est. Priority Date: 08/18/1990
  • Status: Expired due to Fees
First Claim
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1. An arrangement for monitoring a rotational speed sensor of an internal combustion engine having a starter and a rotational speed sensor which supplies an output signal in dependence on a rotational speed, the arrangement comprising means for measuring a vehicle electrical system voltage;

  • a control device in which an output signal of the rotational speed sensor is related to a vehicle electrical system voltage; and

    means for recognizing an error operation of the rotational speed sensor so that a course of the vehicle electrical system voltage is evaluated during a starting process of the internal combustion engine, and an error recognition is released only when a typical course of a starting process for the vehicle electrical system voltage is recognized and simultaneously no output signal of the rotational speed sensor is recognized.

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