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Process for determining the wheel slip of individual wheels of a vehicle

  • US 5,265,946 A
  • Filed: 04/13/1990
  • Issued: 11/30/1993
  • Est. Priority Date: 04/17/1989
  • Status: Expired due to Fees
First Claim
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1. Process for determining wheel slip σ

  • of at least one wheel of a vehicle, said at least one wheel having injective characteristics of braking force coefficient μ

    versus wheel slip σ

    which each have a maximum and which vary as a function of the grip between said at least one wheel and the road surface, said process comprising the steps of;

    detecting brake application;

    generating at least an activating signal in response to said brake application when said vehicle is in a stable braking range;

    intermittently removing and reapplying braking force with respect to said at least one wheel during generation of said activating signal, by means of at least one pressure reducing component associated therewith, whereby wheel speed of said at least one wheel during removal of braking force substantially equals that of a corresponding free running wheel;

    measuring wheel speed of said at least one wheel with braking force applied, during generation of said activating signal;

    measuring wheel speed of the same said at least one wheel with braking force removed, during generation of said activating signal; and

    comparing said wheel speed of said at least one wheel with braking fore applied, with the wheel speed of the same said at least one wheel with braking force removed.

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