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Method of determining the traction of motor vehicle wheels

  • US 5,705,746 A
  • Filed: 02/24/1997
  • Issued: 01/06/1998
  • Est. Priority Date: 03/02/1996
  • Status: Expired due to Fees
First Claim
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1. 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).

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