Method and apparatus for reminding the vehicle operator to refill the spare tire in a tire pressure monitoring system
First Claim
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1. A method of operating a tire pressure monitoring system for a spare tire of a vehicle comprising:
- generating a distance signal corresponding to the distance the spare tire is traveled as a rolling tire;
generating a time duration signal corresponding to a time the spare tire has been stowed;
generating an ambient temperature signal;
determining a temperature profile from the ambient temperature signal;
generating a spare tire warning signal in response to the temperature profile, the distance signal and the time signal.
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Abstract
A tire pressure monitoring system (12) for a spare tire of a vehicle (10) includes an indicator (52) and a timer (44) that generates a first time signal corresponding to the time the spare tire is used as a rolling tire and a second time signal corresponding to a time the spare tire is stowed. The temperature sensor (34) generates a temperature profile and a controller (22) that is coupled to the indicator, the timer, and the temperature sensor generates a spare tire warning signal in response to the temperature profile, the first time signal, and the second time signal.
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Citations
19 Claims
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1. A method of operating a tire pressure monitoring system for a spare tire of a vehicle comprising:
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generating a distance signal corresponding to the distance the spare tire is traveled as a rolling tire;
generating a time duration signal corresponding to a time the spare tire has been stowed;
generating an ambient temperature signal;
determining a temperature profile from the ambient temperature signal;
generating a spare tire warning signal in response to the temperature profile, the distance signal and the time signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a tire pressure monitoring system for a spare tire of a vehicle comprising:
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generating a distance signal corresponding to the distance the spare tire is traveled as a rolling tire;
generating a time signal corresponding to a time duration the spare tire has been stowed;
generating an ambient temperature signal;
determining a rolling temperature profile and a stowed temperature profile from the ambient temperature signal;
determining a tire construction;
generating a tire deflation estimation in response to the spare temperature profile, the stowed temperature profile, the distance signal, the time signal and the tire construction; and
generating a spare tire warning signal in response to the spare dire deflation estimation. - View Dependent Claims (12, 13, 14, 15)
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16. A tire pressure monitoring system for a spare tire of a vehicle comprising:
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an indicator;
a timer generating a time signal corresponding to a time duration the spare tire has been stowed;
a distance sensor generating a distance signal corresponding to the distance the spare tire traveled in a rolling location;
a temperature sensor generating a temperature profile; and
a controller coupled to a plurality of indicators, said controller generating a spare tire warning signal in response to said temperature profile, said time signal and said distance signal, said controller controlling the indicator in response to the spare tire warning signal. - View Dependent Claims (17, 18, 19)
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Specification