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Slip control system for motor vehicle

  • US 5,584,541 A
  • Filed: 11/03/1994
  • Issued: 12/17/1996
  • Est. Priority Date: 01/31/1990
  • Status: Expired due to Fees
First Claim
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1. A slip control system for a motor vehicle, having driving wheels and undriven wheels, which controls slips of the driving wheels comprising:

  • means for detecting a slip ratio of each driving wheel;

    slip decreasing means for decreasing a slip of each driving wheel by controlling a driving force transmitted to the driving wheel so that the slip ratio of the driving wheel is at least equal to a predetermined desired slip ratio after the slip ratio of the driving wheel reaches a threshold for starting a slip control operation and then becomes greater than the threshold;

    yawing rate detecting means for detecting an angular speed at which said vehicle moves around a vertical axis, defining a yawing rate of the vehicle; and

    steering amount detecting means for detecting a steering amount of steering wheels of the vehicle;

    wherein said slip decreasing means includes correcting means for decreasing the desired slip ratio when the motor vehicle is determined to be in an unstable condition, based on both a comparison between a first predetermined value and the yawing rate detected by the yawing rate detecting means and a comparison between a second predetermined value and the steering amount detected by the steering amount detecting means.

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