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Wheel speed detecting device for vehicle

  • US 5,490,070 A
  • Filed: 02/01/1993
  • Issued: 02/06/1996
  • Est. Priority Date: 01/30/1992
  • Status: Expired due to Term
First Claim
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1. A wheel speed detecting device for a vehicle having an internal combustion engine with a throttle valve for controlling output torque, said wheel speed detecting device comprising:

  • an electronic control unit including at least one memory unit, a central processing unit, an input section, and an output section for controlling said throttle valve via a throttle valve driving means;

    wheel speed detecting means for detecting at least a left follower wheel speed and a right follower wheel speed;

    turning state detecting means for detecting a turning state of the vehicle; and

    correcting and calculating means contained in said central processing unit comprising a follower wheel speed average value calculating means for calculating a follower wheel speed average value as a function of said left follower wheel speed and said right follower wheel speed which are input to said input section of said electronic control unit from said wheel speed detecting means, a correction value calculating means for calculating a correction value for said follower wheel speed average value on the basis of an output from said turning state detecting means, and a vehicle speed calculating means for calculating a final wheel speed value as a function of said follower wheel speed average value and said correction value, said final wheel speed value being used to calculate a slip rate;

    wherein whenever said slip rate exceeds a predetermined value said electronic control unit drives said throttle valve driving means for controlling said throttle valve to control output torque of said internal combustion engine.

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