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Automotive system for dynamically determining road adhesion

  • US 4,882,693 A
  • Filed: 12/28/1987
  • Issued: 11/21/1989
  • Est. Priority Date: 12/28/1987
  • Status: Expired due to Fees
First Claim
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1. A system for determining the road adhesion of a tire installed on a road wheel of an automotive vehicle operating on a roadway, comprising;

  • road wheel turn angle measuring means comprising means for producing a first signal representing the turn angle at which the steering system of said vehicle is being operated;

    vehicle speed measuring means comprising means for producing a second signal representing the speed at which said vehicle is being operated;

    steering force measuring means comprising means for producing a third signal representing the steering force required to operate the steering system of said vehicle at said measured road wheel turn angle and said measured vehicle speed; and

    processor means for determining the road adhesion of said tire, with said processor means comprising means for receiving said first, second, and third signals and means for deriving from said signals a fourth signal representing the magnitude of said road adhesion.

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