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Anti-lock brake control system for motor vehicle with facility for discriminating vibrations of driving wheels thereof

  • US 5,952,564 A
  • Filed: 05/19/1997
  • Issued: 09/14/1999
  • Est. Priority Date: 05/17/1996
  • Status: Expired due to Fees
First Claim
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1. A method of determining discriminatively vibration of a driving wheel of a motor vehicle equipped with an engine and an anti-lock brake control system whether said vibration of the driving wheel is due to a judder phenomenon or brought about by rough-road condition, comprising the steps of:

  • a) detecting a rotation speed of said driving wheel;

    b) detecting wheel vibration state on the basis of variation in said rotation speed of said driving wheel;

    c) detecting a torsion torque applied to a driving shaft serving as a torque transmitting member for coupling operatively said engine and said driving wheel to each other;

    d) detecting vibration state of said torsion torque; and

    e) deciding discriminatively whether the vibration of said driving wheel as detected is brought about;

    by said judder phenomenon or alternatively by said rough-road condition, on the basis of a relation between said wheel vibration state and said torsion torque vibration state.

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