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Vehicular alternator failure determination apparatus using commutating device voltage

  • US 6,977,487 B2
  • Filed: 03/07/2003
  • Issued: 12/20/2005
  • Est. Priority Date: 10/08/2002
  • Status: Expired due to Fees
First Claim
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1. A vehicular alternator failure determination apparatus comprising:

  • a maximum voltage detection part for detecting a maximum voltage of an alternator commutating device which commutates an AC output of an alternator driven by an engine;

    a minimum voltage detection part for detecting a minimum voltage of said alternator commutating device;

    a voltage difference calculation part for calculating a difference voltage from outputs of said maximum and minimum voltage detection parts; and

    a failure determination part which determines that said alternator is in a failure state, when an output of said voltage difference calculation part is equal to or greater than a prescribed voltage.

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