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Vehicle dynamic characteristic control apparatus

  • US 5,428,532 A
  • Filed: 12/30/1992
  • Issued: 06/27/1995
  • Est. Priority Date: 01/10/1992
  • Status: Expired due to Fees
First Claim
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1. A vehicle dynamic characteristic control apparatus for use with an automotive vehicle supported on a pair of front wheels and a pair of rear wheels, the apparatus comprising:

  • a first control unit for controlling a steering angle of one of the wheel pairs;

    a second control unit for controlling braking forces to be applied to left and right wheels of at least one of the wheel pairs;

    sensor means sensitive to opera ting conditions of the vehicle for providing sensor signals indicative of sensed vehicle operating conditions; and

    a third control unit coupled to the sensor means for calculating a target value for a dynamic parameter related to a motion of the vehicle based upon the sensed vehicle operating conditions, the third control unit including first means for calculating a target value for the steering angle of the one wheel pair, second means for controlling the steering angle of the one wheel pair to the target steering angle value so as to bring the dynamic parameter to the target dynamic parameter value, third means for calculating an absolute value of the calculated target steering angle value, fourth means for comparing the calculated absolute value with a predetermined value, and fifth means for controlling the second control unit to provide a difference between the braking forces applied to the left and right wheels of the one wheel pair so as to bring the dynamic parameter to the target dynamic parameter value only when the calculated absolute value exceeds the predetermined value.

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