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Integrated auto-theft prevention system

  • US 5,440,177 A
  • Filed: 05/10/1993
  • Issued: 08/08/1995
  • Est. Priority Date: 05/10/1993
  • Status: Expired due to Fees
First Claim
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1. In combination in a system for preventing unauthorized operation of a motor vehicle comprising:

  • a. key module means for receiving a key containing coded values corresponding to a timing offset in a distributor means in said motor vehicle, said offset in either digital or analog format and extracting these coded values for decoding;

    b. System Controller means for receiving coded values from said key module means and processing said values to allow an output of a properly timed distributer timing signal pursuant to receipt of said values that correspond to an authorized use of the vehicle;

    wherein said system controller means receives a timing signal from said distributor offset by a known amount and said received coded values are used in said controller means to modulate and correct said offset if authorized.

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