Method of analyzing stopping distance performance efficiency
AssigneeBridgestone Americas Tire Operations, LLC
InventorsJacob R. Kidney, John L. Turner, Ke-Jun Xie
Life of this patent
Estimating the term…
Abstract
Provided is a method for determining the efficiency of an ABS controller. The method may comprise performing a first test on a first tire using a first ABS controller at a first inflation pressure, gathering a first data set, using a digital computer to generate a first function from the first data set, and using a digital computer to calculate a first efficiency based on the first function. The first data set may comprise data about the first test. The first function may describe normalized mu versus time for a first time period.
Claims13
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.
Dependencies are inferred from the claim text.