Process for using signals in a tire monitoring system to determine reinflation
First Claim
1. A method of determining that a tire of a vehicle is undergoing reinflation as opposed to experiencing an out-of-limits tire pressure condition requiring remedial action, the vehicle being of the type having a tire monitoring system alerting the driver to an out-of-limits tire pressure condition comprising:
- comparing a selected time interval value representative of the actual pressure in the tire at a selected time interval t with a periodically updated reference value of the tire pressure, the periodically updated reference value varying as a function of pressure conditions in the tire prior to the selected time interval t; and
determining that the tire is undergoing reinflation if the difference between the selected time interval value and the periodically updated reference value exceeds a threshold value.
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Abstract
The present invention provides a method for monitoring the pressure of ti in accordance with which a tire monitoring system operates according to a normal mode of detecting flats and under-inflation and according to an assistance mode when reinflating the tires. The switch between the two modes does not require any intervention by the user: through detection of an increase of the inflation pressure in a tire, it can be deduced that the tire in question is in the process of reinflation.
76 Citations
9 Claims
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1. A method of determining that a tire of a vehicle is undergoing reinflation as opposed to experiencing an out-of-limits tire pressure condition requiring remedial action, the vehicle being of the type having a tire monitoring system alerting the driver to an out-of-limits tire pressure condition comprising:
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comparing a selected time interval value representative of the actual pressure in the tire at a selected time interval t with a periodically updated reference value of the tire pressure, the periodically updated reference value varying as a function of pressure conditions in the tire prior to the selected time interval t; and determining that the tire is undergoing reinflation if the difference between the selected time interval value and the periodically updated reference value exceeds a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification