Torsional mode tire wear state estimation system and method
First Claim
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1. A tire wear state estimation system comprising:
- at least one tire supporting a vehicle;
tire pressure measuring means affixed to the one tire for measuring tire inflation pressure and generating tire inflation pressure data;
tire torsional mode measuring means for measuring tire torsional mode frequency and generating tire torsional mode frequency data;
tire identification means mounted to the one tire operably utilized in generating tire-specific frequency mode coefficients using tire-specific identification data; and
tire wear estimation means for calculating an estimation of a tire wear state based upon the tire inflation pressure data and a spectral analysis of the torsional mode frequency data employing the tire-specific frequency mode coefficients.
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Abstract
A tire wear state estimation system includes a tire pressure measuring device affixed to a vehicle tire for measuring tire inflation pressure and generating tire inflation pressure data; tire torsional mode measuring means for measuring tire torsional mode frequency and generating tire torsional mode frequency data; and tire identification means for generating tire-specific torsional mode coefficients using tire-specific identification data. A tire wear estimation is made based upon the tire inflation pressure data, the torsional mode frequency data, and the tire identification derived torsional mode coefficients.
23 Citations
18 Claims
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1. A tire wear state estimation system comprising:
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at least one tire supporting a vehicle; tire pressure measuring means affixed to the one tire for measuring tire inflation pressure and generating tire inflation pressure data; tire torsional mode measuring means for measuring tire torsional mode frequency and generating tire torsional mode frequency data; tire identification means mounted to the one tire operably utilized in generating tire-specific frequency mode coefficients using tire-specific identification data; and tire wear estimation means for calculating an estimation of a tire wear state based upon the tire inflation pressure data and a spectral analysis of the torsional mode frequency data employing the tire-specific frequency mode coefficients. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A tire wear state estimation system comprising:
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at least one tire for supporting a vehicle; a tire-mounted pressure measuring device affixed to the one tire operative to measure a tire cavity pressure and transmit tire inflation pressure data from the tire cavity pressure measurement; tire-specific identification data stored within and accessible from a tire-mounted data storage device; tire torsional mode measuring means for measuring tire torsional mode frequency and generating tire torsional mode frequency data; tire identification means mounted to the one tire operably utilized in generating tire-specific torsional mode frequency coefficients using the tire-specific identification data and wheel speed signal or longitudinal acceleration signal measurement of a tire torsional mode frequency; and tire wear estimation means for calculating an estimation of a tire wear state based upon the tire inflation pressure data and a spectral analysis of the tire torsional mode frequency data utilizing the tire-specific torsional mode coefficients. - View Dependent Claims (11, 12, 13)
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14. A method of tire wear state estimation comprising:
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affixing a tire pressure measuring device to a vehicle-supporting tire, the pressure measuring device having at least one pressure sensor measuring a tire cavity inflation pressure and generating tire inflation pressure data; measuring tire torsional mode frequency and generating tire torsional mode frequency data; affixing a tire-specific identification device to the vehicle-supporting tire operable to provide tire-specific identification data; generating tire-specific torsional mode coefficients based on the tire-specific identification data; and calculating an estimation of a tire wear state based upon the tire inflation pressure data and a spectral analysis of the measured torsional mode frequency data utilizing the tire-specific frequency mode coefficients based on the tire-specific identification data. - View Dependent Claims (15, 16, 17, 18)
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Specification