| 摘要 |
A method for determining a maximum coefficient of frictionμmax between a tire and an underlying surface entails empirically determining a reference curveμref(S) of a coefficient of frictionμref 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 frictionμ1 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 frictionμ2 between the tire and the underlying surface at a second instant t2, computing a slope of the curveμ(S) of the coefficient of frictionμas a function of slip S, and computing the maximum coefficient of frictionμmax between the tire and the underlying surface by transforming the reference curveμref(S) on the basis of the slope of the curveμ(S). With the aid of the vehicle devices present in any event in modern motor vehicles it is possible to use the information provided by the vehicle devices to be able to compute the momentary slip S and the momentary coefficient of frictionμ. By comparing the momentary curveμ(S) that can be determined from the measuring points (μ1; S1) and (μ2; S2) with the empirically determined reference curveμref(S) it is possible using a suitable mathematical method to very accurately estimate, in particular interpolate, the maximum coefficient of frictionμmax for the momentary material pairing of the tire with the underlying surface.
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