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Steering angle control system for vehicle

  • US 5,606,502 A
  • Filed: 12/23/1994
  • Issued: 02/25/1997
  • Est. Priority Date: 12/27/1993
  • Status: Expired due to Term
First Claim
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1. A steering angle control system for a vehicle, comprising:

  • a front wheel steering angle detecting means for detecting one of a steering wheel angle of a steering wheel and a steer angle of a front wheel and outputting a signal indicative of the steering angle;

    a vehicle speed detecting means for detecting a speed of the vehicle;

    a vehicle motion variable detecting means for detecting a vehicle motion variable of the vehicle;

    a steer angle controlled variable determining means for determining a controlled variable of a steer angle according to the signal from said front wheel steer angle detecting means and the signal from said vehicle speed detecting means;

    a steering angle correcting means for correcting the signal from said front wheel steering angle detecting means according to a preset map indicative of a characteristic of a steering system including the steering wheel;

    a desired vehicle motion variable calculating means for calculating a desired value of the vehicle motion variable according to the corrected steering angle and the vehicle speed;

    an auxiliary steer angle controlled variable determining means for determining an auxiliary controlled variable of the steer angle controlled variable according to a difference between the desired vehicle motion variable and the detected vehicle motion variable;

    a steer angle controlled variable correcting means for correcting the steer angle controlled variable by adding the auxiliary steer angle controlled variable to the steer angle controlled variable; and

    an actual steer angle controlling means for controlling a steer angle of a wheel to be controlled upon receiving the corrected steer angle controlled variable.

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