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Method of analyzing stopping distance performance efficiency

  • US 9,168,906 B2
  • Filed: 03/13/2012
  • Issued: 10/27/2015
  • Est. Priority Date: 03/18/2011
  • Status: Expired due to Fees
First Claim
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1. A method for determining efficiency of a tire-vehicle-ABS system comprising the steps of:

  • (A) providing a vehicle with a wheel;

    (B) providing the vehicle with a first ABS controller that is operable to control braking of the wheel;

    (C) providing a first tire made according to a first specification;

    (D) defining a first tire-vehicle-ABS system as the combination of the vehicle, the first ABS controller and the first tire;

    (E) inflating the first tire to a first inflation pressure;

    (F) collecting mu-slip data for the first tire at the first inflation pressure;

    (G) providing the first tire at the first inflation pressure on the wheel;

    (H) performing a first stopping distance test on the first tire-vehicle-ABS system under the conditions of step (G) to create stopping distance data;

    (I) inflating the first tire to a second inflation pressure;

    (J) collecting mu-slip data for the first tire at the second inflation pressure;

    (K) providing the first tire at the second inflation pressure on the wheel;

    (L) performing a second stopping distance test on the first tire-vehicle-ABS system under the conditions of step (K) to create stopping distance data;

    (M) using the collected mu-slip data from the first tire at the first and second inflation pressures to;

    (1) determine peak mu and slip ratio at peak mu; and

    , (2) create a data curve of normalized mu versus time; and

    ,(N) using the data curve of normalized mu versus time to calculate efficiency of the first tire-vehicle-ABS system.

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