Coefficient-of-friction estimator
AssigneesZF Friedrichshafen AG, WABCO Europe BVBA, TRW Automotive U.S. LLC
InventorsFriedrich Tenbrock, Sven Gohl, Christoph Schall, Dan Williams, Stephan Kallenbach, Klaus Plähn, Thomas Dieckmann, Ralph-Carsten Lülfing
Life of this patent
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Abstract
A method for determining a coefficient-of-friction, the method including braking a first wheel of a vehicle such that a slip between the first wheel and a roadway is less than a slip between a second wheel of the vehicle and the roadway, and determining a coefficient-of-friction between the first wheel and the roadway based on the behavior of the first wheel during the braking. The method optionally including hazard braking the vehicle.
Claims16
A method for determining a coefficient-of-friction, the method comprising:
- controlling, by at least one control unit, a braking system to brake a first wheel of a vehicle such that a slip between the first wheel and a roadway is less than a slip between a second wheel of the vehicle and the roadway;
- and
- determining, by the at least one control unit, a coefficient-of-friction between the first wheel and the roadway based on the behavior of the first wheel during the braking.
A method for braking a vehicle, the method comprising:
- controlling, by at least one control unit, a braking system to brake a first wheel of a vehicle such that a slip between the first wheel and a roadway is less than a slip between a second wheel of the vehicle and the roadway;
- determining, by the at least one control unit, a coefficient-of-friction between the first wheel and the roadway based on the behavior of the first wheel during the braking;
- and
- after braking the first wheel, controlling, by the at least one control unit, the braking system to hazard brake the vehicle.
Dependencies are inferred from the claim text.