Method and device for monitoring tire pressure utilizing a reference value that evolves according to a predetermined function of time
AssigneesMichelin Recherche et Technique S.A., TRW Automotive U.S. LLC
InventorLaurent Branger
Life of this patent
Estimating the term…
Abstract
A method of monitoring a pressure (P) of a tire of a motor vehicle involves measuring a pressure (P) of the tire and comparing the measured pressure with at least one reference value (PrM, Prm, Pr). The reference value (PrM, Prm, Pr) varies in accordance with a temporal law that depends on at least one of the following parameters: a temporal benchmark, a speech of the vehicle, a temperature of the tire, and a parameter that is based on at least one of the previous three parameters. The reference value (PrM, Prm, Pr) varies between first and second extreme values.
Claims17
A method for monitoring a pressure of a tire of a motor vehicle, comprising steps of:
- measuring a pressure of the tire;
- comparing the measured pressure with a reference value that varies in accordance with a temporal law,
- wherein the temporal law depends on at least one of:
- a temporal benchmark,
- a speed of the vehicle, and
- a temperature of the tire, and
- wherein the reference value varies between first and second extreme values;
- enabling the reference value to evolve according to a first predetermined function of time, if the vehicle is running at a speed greater than a predetermined threshold speed and so long as the second extreme value is not attained;
- and
- enabling the reference value to evolve according to a second predetermined function of time, if the vehicle has stopped or is running at a speed less than the predetermined threshold speed and so long as the first extreme value is not attained.
Dependencies are inferred from the claim text.