Vehicle tire diagnosis method and apparatus
First Claim
Patent Images
1. A method for monitoring a vehicle tire, including:
- storing, in a computer-readable medium, a vehicle- and/or tire-specific diagnostic model capable of calculating a value of at least one tire deterioration parameter from a value of at least one operating parameter pertaining to operational demands on the vehicle tire, wherein the diagnostic model includes at least one vehicle adjustment parameter selected from wheel camber and wheel toe and the at least one tire deterioration parameter comprises a temperature prevailing in a tire material proximal to a junction between a sidewall and a tread of the vehicle tire;
storing, in a computer-readable medium, a tire deterioration model capable of ascertaining a tire deterioration characterizing value from a time progression of the value of the at least one tire deterioration parameter, wherein the tire deterioration model contains an integral over time of the temperature prevailing in the tire material proximal to the junction between the sidewall and the tread of the vehicle tire;
determining a value of the at least one vehicle adjustment parameter,detecting the value of the at least one operating parameter;
determining the value of the at least one tire deterioration parameter using the stored diagnostic model based upon at least the determined value of the at least one vehicle adjustment parameter and the detected value of the at least one operating parameter;
detecting the time progression of the value of the at least one tire deterioration parameter value;
determining the tire deterioration characterizing value based upon the stored tire deterioration model and at least the integral over time of the detected value of the at least one tire deterioration parameter value;
generating a prognosis representing the condition of the tire based upon the tire deterioration characterizing value; and
outputting the prognosis.
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Abstract
An on-board vehicle diagnostic system includes sensors for detecting vehicle operating parameters, such as speed, wheel speed, yaw rate, transverse acceleration, and/or tire operating parameters, such as the tire inflation pressure and the temperature at the belt edge. Relationships between the parameters are stored in a diagnostic model so that depending on the complexity level of the system and performance requirements, predictions regarding the wear condition of the tire and/or defective vehicle adjustments are possible.
49 Citations
22 Claims
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1. A method for monitoring a vehicle tire, including:
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storing, in a computer-readable medium, a vehicle- and/or tire-specific diagnostic model capable of calculating a value of at least one tire deterioration parameter from a value of at least one operating parameter pertaining to operational demands on the vehicle tire, wherein the diagnostic model includes at least one vehicle adjustment parameter selected from wheel camber and wheel toe and the at least one tire deterioration parameter comprises a temperature prevailing in a tire material proximal to a junction between a sidewall and a tread of the vehicle tire; storing, in a computer-readable medium, a tire deterioration model capable of ascertaining a tire deterioration characterizing value from a time progression of the value of the at least one tire deterioration parameter, wherein the tire deterioration model contains an integral over time of the temperature prevailing in the tire material proximal to the junction between the sidewall and the tread of the vehicle tire; determining a value of the at least one vehicle adjustment parameter, detecting the value of the at least one operating parameter; determining the value of the at least one tire deterioration parameter using the stored diagnostic model based upon at least the determined value of the at least one vehicle adjustment parameter and the detected value of the at least one operating parameter; detecting the time progression of the value of the at least one tire deterioration parameter value; determining the tire deterioration characterizing value based upon the stored tire deterioration model and at least the integral over time of the detected value of the at least one tire deterioration parameter value; generating a prognosis representing the condition of the tire based upon the tire deterioration characterizing value; and outputting the prognosis. - View Dependent Claims (2, 3, 4, 5)
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6. A method for monitoring at least one vehicle adjustment parameter selected from wheel camber and wheel toe, including:
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storing, in a computer-readable medium, a vehicle- and tire-specific diagnostic model capable of calculating at least one value of the wheel camber or the wheel toe from at least a value of at least one tire deterioration parameter and a value of at least one vehicle operating parameter; detecting the value of the at least one tire deterioration parameter; detecting the value of the at least one vehicle operating parameter; calculating at least one value of the wheel camber or wheel toe by inputting at least the detected values into the stored vehicle- and tire-specific diagnostic model; generating a result indicating the at least one calculated value of the wheel camber or wheel toe; and outputting the result. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method for generating a vehicle-tire interaction model, including:
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calculating a tire- and vehicle-specific virtual map, which includes at least a temperature prevailing in a tire material proximal to a junction between a sidewall and a tread of the tire, as a function of at least one vehicle adjustment parameter selected from wheel camber and wheel toe, at least one vehicle operating parameter and at least one tire adjustment parameter; test-based determining a tire- and vehicle-specific real map, which includes at least the temperature prevailing in the tire material proximal to the junction between the sidewall and the tread of the tire, as a function of at least one vehicle adjustment parameter selected from wheel camber and wheel toe, at least one vehicle operating parameter and at least one tire adjustment parameter; combining the virtual and real maps to form the vehicle-tire interaction model; and storing the vehicle-tire interaction model in a computer-readable medium. - View Dependent Claims (14)
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15. A method for generating a vehicle-tire reliability map, including:
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determining a tire- and vehicle-specific map, which includes at least one parameter relevant to deterioration of a vehicle tire, as a function of at least one vehicle adjustment parameter selected from wheel camber and wheel toe, at least one vehicle operating parameter and at least one tire adjustment parameter, wherein the at least one parameter relevant to deterioration of a vehicle tire includes a temperature in a tire material proximal to a junction between a sidewall and a tread of the vehicle tire; test-based determining the service life of the vehicle tire for different values of the at least one parameter relevant to deterioration of the vehicle tire; generating the vehicle-tire reliability map from the tire- and vehicle-specific map and the determined service life data; and storing the vehicle-tire reliability map in a computer-readable medium.
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16. A tire monitoring system, including:
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means for storing a vehicle- and/or tire-specific diagnostic model capable of calculating a value of at least one tire deterioration parameter from a value of at least one operating parameter pertaining to operational demands on the vehicle tire, wherein the diagnostic model includes at least one vehicle adjustment parameter selected from wheel camber and wheel toe and the at least one the deterioration parameter is a temperature prevailing in a tire material proximal to a junction between a sidewall and a tread of the vehicle tire; means for storing a tire deterioration model capable of ascertaining a tire deterioration characterizing value from a time progression of the value of the at least one tire deterioration parameter, wherein the tire deterioration model contains an integral over time of the temperature prevailing in the tire material proximal to the junction between the sidewall and the tread of the vehicle tire; means for determining a value of the at least one vehicle adjustment parameter, at least one sensor arranged and constructed to detect the value of the at least one operating parameter; means for determining the value of the at least one tire deterioration parameter using the diagnostic model based upon the determined value of the at least one vehicle adjustment parameter and the detected value of the at least one operating parameter; means for detecting the time progression of the value of the at least one tire deterioration parameter value; and means for determining the tire deterioration characterizing value based upon the tire deterioration model and the integral over time of the value of the at least one tire deterioration parameter value. - View Dependent Claims (17, 18)
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19. A vehicle diagnostic system, including:
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means for storing a diagnostic model containing relationships between at least one vehicle adjustment parameter selected from wheel camber and wheel toe, at least one vehicle operating parameter and at least one tire adjustment parameter, means for detecting at least one tire operating parameter and means for ascertaining the at least one vehicle adjustment parameter by entering the at least one detected tire operating parameter into the diagnostic model. - View Dependent Claims (20)
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21. A computer-readable medium comprising a computer program recorded thereon, the computer program comprising:
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a vehicle- and/or tire-specific diagnostic model capable of calculating a value of at least one tire deterioration parameter from a value of at least one operating parameter pertaining to operational demands on the vehicle tire, wherein the diagnostic model includes at least one vehicle adjustment parameter selected from wheel camber and wheel toe and the at least one tire deterioration parameter comprises a temperature prevailing in a tire material proximal to a junction between a sidewall and a tread of the vehicle tire; and a tire deterioration model capable of ascertaining a tire deterioration characterizing value from a time progression of the value of the at least one tire deterioration parameter, wherein the tire deterioration model contains an integral over time of the temperature prevailing in the tire material proximal to the junction between the sidewall and the tread of the vehicle tire; the computer program further comprising instructions that, when executed by a computer, perform the functions of; determining a value of the at least one vehicle adjustment parameter, detecting the value of the at least one operating parameter; determining the value of the at least one tire deterioration parameter using the stored diagnostic model based upon at least the determined value of the at least one vehicle adjustment parameter and the detected value of the at least one operating parameter; detecting the time progression of the value of the at least one tire deterioration parameter value; determining the tire deterioration characterizing value based upon the stored tire deterioration model and at least the integral over time of the detected value of the at least one tire deterioration parameter value; generating a prognosis representing the condition of the tire based upon the tire deterioration characterizing value; and outputting the prognosis. - View Dependent Claims (22)
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Specification