Process for using signals in a tire monitoring system to determine reinflation
AssigneeCompagnie Generale des Establissements Michelin-Michelin et Cie
InventorJean-Francois Chamussy
Life of this patent
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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.
Claims9
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.
Dependencies are inferred from the claim text.