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Engine control system with vehicle anti-theft function

  • US 5,638,270 A
  • Filed: 06/05/1995
  • Issued: 06/10/1997
  • Est. Priority Date: 02/17/1995
  • Status: Expired due to Term
First Claim
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1. In a vehicle engine control system of the type comprising electronic circuit means having a vehicle anti-theft function which permits control of the vehicle engine in response to input to said electronic circuit means of a correct ID code and which prevents control of the vehicle engine in the absence of said correct ID code input to said electronic circuit means, said electronic circuit means including an engine control unit, and said system including a power supply that is connectable to said engine control unit, the improvement comprising:

  • first means responsive to each connecting of said power supply to said engine control unit for determining whether or not said connecting follows a preceding momentary disconnection of said power supply from said engine control unit, andsecond means, responsive to a determination by said first means that there has been a preceding momentary disconnection of said power supply from said engine control unit, for disabling the engine control preventing function of said electronic circuit means,said engine control system being operative to permit control of the vehicle engine when said engine control preventing function of said electronic circuit means has been disabled.

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