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Wheel ground-contact state judging device and method

  • US 7,797,093 B2
  • Filed: 07/11/2005
  • Issued: 09/14/2010
  • Est. Priority Date: 07/12/2004
  • Status: Active Grant
First Claim
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1. A wheel ground-contact state judging device comprising:

  • a detector for directly detecting, as a lateral force, a force acting on a wheel in a direction perpendicular to a wheel center plane of the wheel;

    an acceleration sensor for detecting an acceleration in the lateral direction of a vehicle;

    a calculator for calculating a cornering force acting on the wheel on the basis of the acceleration in the lateral direction detected by the acceleration sensor; and

    a judging unit for judging the ground-contact state of the wheel on the basis of comparison between the detected lateral force and the calculated cornering force, wherein said judging unit determines an existence of a bad ground-contact state of the wheel upon a criteria being established that the calculated cornering force is smaller than the detected lateral force by a predetermined amount.

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