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Rear wheel steering angle control system for vehicle

  • US 5,047,939 A
  • Filed: 09/07/1989
  • Issued: 09/10/1991
  • Est. Priority Date: 09/08/1988
  • Status: Expired due to Term
First Claim
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1. An apparatus for controlling a rear wheel steering angle of a vehicle comprising:

  • first means for sensing vehicle speed to provide a signal indicative thereof;

    second means for sensing an actual steered angle of a front wheel of the vehicle to provide a signal indicative thereof;

    third means for deriving a first locus defined along a path of a first specific point on the front end of the vehicle based on the signals from said first and second means;

    fourth means for determining a target steering angle for a rear wheel based on parameters associated with the vehicle speed and the actual steered angle of the front wheel sensed by said first and second means such that a second locus extending along a path of a second specific point on the rear end of the vehicle is defined within said first locus with respect to the center of the vehicle turning circle; and

    fifth means for controlling the rear wheel actual steering angle based on said target steering angle to restrict the amount of overhand of the rear end of the vehicle during turning.

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