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Traction control apparatus

  • US 4,970,650 A
  • Filed: 04/18/1989
  • Issued: 11/13/1990
  • Est. Priority Date: 04/20/1988
  • Status: Expired due to Fees
First Claim
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1. A traction control apparatus comprising:

  • acceleration slippage detecting means for, when it is detected that acceleration slippage occurs in driving wheels of a vehicle, outputting at least one of an engine control start instruction and a braking control start instruction;

    drive state detecting means for detecting a drive state of the vehicle;

    driving wheel velocity detecting means for detecting left and right driving wheel velocities of the vehicle;

    driving wheel velocity selecting means for selecting and outputting one of a driving wheel rotating speed calculated using the left and right driving wheel velocities detected by said driving wheel velocity detecting means, and said left and right driving wheel rotation speeds, in accordance with a result obtained from said drive state detecting means;

    driven wheel velocity detecting means for detecting a driven wheel velocity of the vehicle;

    reference velocity setting means for setting a reference velocity on the basis of an output from said driven wheel velocity detecting means;

    first slip value detecting means for detecting slip values of the driving wheels on the basis of difference between the outputs from said driving wheel velocity selecting means and an output from said reference velocity setting means;

    engine output control means for controlling an engine output of the vehicle in accordance with the slip values detected by said first slip value detecting means upon reception of the engine control start instruction;

    second slip value detecting means for detecting slip values of the driving wheels on the basis of differences between the outputs from the driving wheel velocity detecting means and the output from said reference velocity setting means; and

    braking force control means for controlling braking forces of the driving wheels in accordance with the slip values detected by said second slip value detecting means upon reception of the braking control start instruction.

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