TIRE WEAR STATE ESTIMATION SYSTEM AND METHOD
First Claim
1. A tire wear state estimation system comprising:
- at least one tire supporting a vehicle;
a CAN bus system disposed on the vehicle,at least one sensor disposed on the vehicle and in electronic communication with the CAN bus system;
the at least one sensor measuring selected parameters associated with the vehicle and communicating data for the selected parameters through the CAN bus system, including a first set of data, a second set of data and a third set of data;
a rolling radius estimator operative to receive the first set of data and estimate a rolling radius for the at least one tire;
an acceleration slip estimator operative to receive the second set of data and the estimated rolling radius to estimate the slip of the at least one tire during acceleration of the vehicle;
a braking slip estimator operative to receive the third set of data and the estimated rolling radius to estimate the slip of the at least one tire during braking of the vehicle; and
a tire slip analyzer to correlate the estimation of the slip of the at least one tire during acceleration of the vehicle and the slip of the at least one tire during braking of the vehicle and generate an estimated wear state of the at least one tire.
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Accused Products
Abstract
A tire wear state estimation system includes at least one sensor disposed on a vehicle and a CAN bus system. The sensor measures selected parameters associated with the vehicle and communicates data for the selected parameters through the CAN bus system, including a first set of data, a second set of data and a third set of data. A rolling radius estimator receives the first set of data and estimates a rolling radius for the tire. An acceleration slip estimator receives the second set of data and the estimated rolling radius to estimate the slip of the tire during acceleration. A braking slip estimator receives the third set of data and the estimated rolling radius to estimate the slip of the tire during braking. A tire slip analyzer correlates the acceleration slip estimation and the braking slip estimation and generates an estimated wear state of the tire.
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Citations
20 Claims
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1. A tire wear state estimation system comprising:
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at least one tire supporting a vehicle; a CAN bus system disposed on the vehicle, at least one sensor disposed on the vehicle and in electronic communication with the CAN bus system; the at least one sensor measuring selected parameters associated with the vehicle and communicating data for the selected parameters through the CAN bus system, including a first set of data, a second set of data and a third set of data; a rolling radius estimator operative to receive the first set of data and estimate a rolling radius for the at least one tire; an acceleration slip estimator operative to receive the second set of data and the estimated rolling radius to estimate the slip of the at least one tire during acceleration of the vehicle; a braking slip estimator operative to receive the third set of data and the estimated rolling radius to estimate the slip of the at least one tire during braking of the vehicle; and a tire slip analyzer to correlate the estimation of the slip of the at least one tire during acceleration of the vehicle and the slip of the at least one tire during braking of the vehicle and generate an estimated wear state of the at least one tire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for estimating the wear state of a tire supporting a vehicle, the method comprising the steps of:
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providing at least one sensor disposed on the vehicle and in electronic communication with a CAN bus system; measuring selected parameters associated with the vehicle using the at least one sensor; communicating data for the selected parameters through the CAN bus system, including a first set of data, a second set of data and a third set of data; estimating a rolling radius for the at least one tire with the first set of data; estimating the slip of the at least one tire during acceleration of the vehicle with the second set of data and the estimated rolling radius; estimating the slip of the at least one tire during braking of the vehicle with the third set of data and the estimated rolling radius; and correlating the estimation of the slip of the at least one tire during acceleration of the vehicle and the slip of the at least one tire during braking of the vehicle to generate an estimated wear state of the at least one tire. - View Dependent Claims (17, 18, 19, 20)
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Specification