Method of determining the traction of motor vehicle wheels
AssigneeDaimler-Benz Aktiengesellschaft
InventorsDiane Trost, Jurgen Trost, Markus Raab
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Abstract
In a method of determining the traction of motor vehicle wheels on wet pavements, a surge force generated by a water film on the pavement in front of at least one of the vehicle wheels is measured and from the measured surge force value and the instantaneous vehicle speed a critical speed at which the vehicle wheel will aqua-plane is determined and this critical speed is displayed to the driver or it is used to control a vehicle drive unit to keep the vehicle speed below the critical speed.
Claims5
A method of determining traction of motor vehicle wheels on a wet road surface, on which a surge force is generated by a water film on the road surface when said motor vehicle is rolling over said road surface in the longitudinal direction of said motor vehicle, comprising the steps of:
- measuring said surge force at least on one wheel of said motor vehicle, and generating from the measured surge force value and the instantaneous motor vehicle speed a signal corresponding to a critical speed at which, with a instantaneous water film thickness, the motor vehicle will plane (aqua planing speed).
Dependencies are inferred from the claim text.