Patent · US Active

Method and device for determining a maximum coefficient of friction between a tire and an underlying surface

US8645038B2 · kind B2 · utility

1Cited by

50References

17Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Stefan Kammann · Kelkheim, DE
Lothar Keller · Stuttgart, DE

Key dates

Filing date	Jan 7, 2011
Grant date	Feb 4, 2014
Priority date	—
Expiry date	Aug 25, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01M17/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for determining a maximum coefficient of friction μmax between a tire and an underlying surface entails empirically determining a reference curve μref(S) of a coefficient of friction μref 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 μ1 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 μ2 between the tire and the underlying surface at a second instant t2, computing a slope of the curve μ(S) of the coefficient of friction μ as a function of slip S, and computing the maximum coefficient of friction μmax between the tire and the underlying surface by transforming the reference curve μref(S) on the basis of the slope of the curve μ(S).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.