Vehicle safety system with advanced tire monitoring
First Claim
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1. A safety system for a vehicle comprising:
- a tire sensor located within each wheel of the vehicle and each generating a tire signal comprising pressure, temperature and multi-axis acceleration data;
at least one vehicle dynamics sensor providing a vehicle dynamics signal; and
a controller communicating with each tire sensor and the at least one vehicle dynamics sensor, the controller, in response to the vehicle dynamics signal;
generating a tire abnormal state value as a function of the multi-axis acceleration data of the tire signal and a comparison of frequency response characteristics of the tire signal; and
transmitting the tire abnormal state to at least one vehicle system controller.
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Abstract
A control system (11) for a vehicle (10) includes vehicle dynamics sensors (35-47) providing a vehicle dynamics signal. Tire monitoring system sensors (20) in each wheel generate tire signals including temperature, pressure and acceleration data. A controller (26) communicates with the tire monitoring system sensors (20) and at least one vehicle dynamics sensor, and generates a tire abnormality value as a function of the multi-axis acceleration data of the tire signals. Tire multi-axis acceleration data is also used to detect a roadway departure, and an oversteer or understeer event.
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Citations
31 Claims
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1. A safety system for a vehicle comprising:
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a tire sensor located within each wheel of the vehicle and each generating a tire signal comprising pressure, temperature and multi-axis acceleration data; at least one vehicle dynamics sensor providing a vehicle dynamics signal; and a controller communicating with each tire sensor and the at least one vehicle dynamics sensor, the controller, in response to the vehicle dynamics signal; generating a tire abnormal state value as a function of the multi-axis acceleration data of the tire signal and a comparison of frequency response characteristics of the tire signal; and transmitting the tire abnormal state to at least one vehicle system controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A safety system for a vehicle comprising:
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a tire sensor located within each wheel of the vehicle and generating a tire signal comprising pressure, temperature and multi-axis acceleration data; at least one vehicle dynamics sensor providing a vehicle dynamics signal; and a controller communicating with each tire sensor and the at least one vehicle dynamics sensor, the controller, in response to the vehicle dynamics signal, generating a roadway departure signal as a function of the multi-axis acceleration data of the tire signals as a comparison of frequency and amplitude response characteristics of the tire signal; and transmitting the roadway departure signal to at least one vehicle system controller. - View Dependent Claims (24, 25, 26, 27)
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28. A safety system for a vehicle comprising:
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a tire sensor located within each wheel of the vehicle and generating a tire signal comprising pressure, temperature and multi-axis acceleration data; at least one vehicle dynamics sensor providing a vehicle dynamics signal; a brake system for applying a braking torque to each of the vehicle wheels in response to a brake signal; and a controller communicating with each tire sensor and the at least one vehicle dynamics sensor, the controller, in response to the vehicle dynamics signal, generating a lateral tire force signal for each of the vehicle wheels as a function of the respective multi-axis acceleration data of the tire signal as a comparison of frequency response characteristics of the tire signal, generating an oversteer/understeer signal as a function of the lateral tire force signal, and transmitting the brake signal to the brake system in response to the oversteer/understeer signal. - View Dependent Claims (29, 30, 31)
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Specification