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System and method for monitoring an electrical power relay in a hybrid electric vehicle

  • US 20070115604A1
  • Filed: 11/21/2005
  • Published: 05/24/2007
  • Est. Priority Date: 11/21/2005
  • Status: Active Grant
First Claim
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1. System for monitoring an electrical relay operable to conduct electrical power from a source to a load device, comprising:

  • an electrical relay;

    a resistive device, electrically connected to the electrical relay in a parallel circuit;

    a controllable electrical load device;

    at least one sensing device; and

    , a controller;

    a. electrically operably connected to the electrical relay;

    b. electrically signally connected to each sensing device;

    c. operable to identify a low electrical load condition at the load device;

    d. operable to monitor operating status of the controllable electrical load device; and

    , e. operable to monitor a change in electrical power to the controllable electrical load device when the electrical relay is in a commanded-open position.

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