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WHEEL DIAMETER VARIATION-DETECTING DEVICE

  • US 20100114428A1
  • Filed: 05/12/2008
  • Published: 05/06/2010
  • Est. Priority Date: 06/01/2007
  • Status: Active Grant
First Claim
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1. A wheel diameter variation-detecting device for detecting variation in diameter between a plurality of wheels of a vehicle, the wheels rotating independently of each other, comprising:

  • wheel rotational speed sensors that detect rotational speeds of the wheels, respectively;

    variation parameter-calculating means for calculating a variation parameter indicative of variation in diameter between the wheels, using one of the wheels as a reference wheel, based on a result of comparison between a detected rotational speed of the reference wheel and a detected rotational speed of another wheel;

    travelled distance-detecting means for detecting a travelled distance of the vehicle; and

    variation parameter-learning means for learning the variation parameter based on a value obtained by averaging a plurality of values of the variation parameter obtained before the detected travelled distance reaches a predetermined distance.

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