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Vehicle passive keyless entry and passive engine starting system

  • US 5,751,073 A
  • Filed: 11/20/1996
  • Issued: 05/12/1998
  • Est. Priority Date: 11/20/1996
  • Status: Expired due to Fees
First Claim
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1. A motor vehicle comprising, in combination:

  • an engine;

    an electric engine power circuit;

    a start motor;

    a vehicle body having a seating space therein associated with a driver seat;

    detector means for detecting the presence of a valid radio frequency transmitter only within the seating space by receiving a coded radio frequency signal therefrom, deriving a code from the radio frequency signal and validating the derived code in a predetermined validation process;

    a RUN signal generator;

    a steering column lock;

    an engine speed signal generator; and

    start control means responsive to activation of the RUN signal generator, provided that the detector means has detected the presence of a valid radio frequency transmitter within the seating space, to (1) unlock the steering column lock, (2) activate the engine electric power circuit and the start motor, (3) repeatedly receive an engine speed signal from the engine speed signal generator and compare the received engine speed signal to a predetermined speed reference indicating engine starting, (4) deactivate the start motor when the engine speed signal exceeds the speed reference or alternatively deactivate the engine electric power circuit and the start motor and lock the column lock if the engine speed signal does not exceed the speed reference within a first predetermined time.

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  • 7 Assignments
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