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Apparatus for monitoring an internal combustion engine of a vehicle

DC CAFC
  • US 5,222,469 A
  • Filed: 06/09/1992
  • Issued: 06/29/1993
  • Est. Priority Date: 06/09/1992
  • Status: Expired due to Term
First Claim
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1. Apparatus for monitoring an engine of a vehicle having an ignition switch operable between on and off positions, a vehicle power supply, and an electrical load selectively connectable to the vehicle power supply via the ignition switch, comprising:

  • first means for controllably connecting and disconnecting the vehicle power supply to the ignition switch,second means for detecting when the ignition switch is in the on position,third means for detecting when the vehicle is stationary,said ignition switch having first and second on positions,fourth means responsive to the second and third means for timing the co-existence of the ignition switch being in either of the first and second on positions and the vehicle being stationary,and fifth means responsive to said fourth means for causing said first means to disconnect the vehicle power supply from the ignition switch after said fourth means reaches a predetermined period of time.

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