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Traction control system for motor vehicle

  • US 5,281,008 A
  • Filed: 06/25/1992
  • Issued: 01/25/1994
  • Est. Priority Date: 06/25/1991
  • Status: Expired due to Fees
First Claim
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1. A traction control system for a motor vehicle having driving wheels, comprising:

  • means for detecting a speed of each of the driving wheels of the vehicle;

    means for calculating a slip value of the driving wheels based on the detected speeds of the driving wheels;

    engine output control means for controlling each of the driving wheels so that the slip value of each of the driving wheels is controlled to become equal to a predetermined first desired slip value when the slip value of each driving wheel is greater than the predetermined first desired slip value;

    brake force control means for controlling each of the driving wheels so that the slip value of each of the driving wheels is controlled to become equal to a predetermined second desired slip value when the slip value of each driving wheel is greater than the predetermined second desired slip value, wherein the control carried out by said brake force controlling means includes a phase of increasing brake fluid pressure which includes a plurality of brake pressure increasing modes and a phase of decreasing the brake fluid pressure which includes a plurality of brake pressure decreasing modes;

    engine control restriction means for restricting the engine output control means while the braking control is carried out, said engine control restriction means restricts the output of the engine when the braking forces applied to the right and left driving wheels are increasing, and wherein said engine output control means is controlled on the basis of said brake pressure increasing modes.

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