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METHOD AND DEVICE FOR DETERMINING A MAXIMUM COEFFICIENT OF FRICTION BETWEEN A TIRE AND AN UNDERLYING SURFACE

  • US 20110166761A1
  • Filed: 01/07/2011
  • Published: 07/07/2011
  • Est. Priority Date: 01/07/2010
  • Status: Active Grant
First Claim
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1. A method of determining a maximum coefficient of friction μ

  • max between a tire and an underlying surface, the method which comprises;

    empirically determining a reference curve μ

    ref(S) of a coefficient of friction μ

    ref as a function of a slip S between the tire and an underlying reference surface;

    determining a first momentary slip S1 for the tire and a first momentary coefficient of friction μ

    1 between the tire and the underlying surface at a first instant t1;

    determining a second momentary slip S2 for the tire and a second momentary coefficient of friction μ

    2 between the tire and the underlying surface at a second instant t2;

    computing a slope of the momentary curve μ

    (S) of the coefficient of friction μ

    as a function of the slip S; and

    computing the maximum coefficient of friction μ

    max between the tire and the underlying surface by transforming the reference curve μ

    ref(S) on the basis of the slope of the curve μ

    (S).

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