Patent ID: 8576121

Claim:
A method for localization of the lateral position of the wheels of a vehicle, said vehicle being equipped with a tire pressure monitoring system, and being equipped with an electronic central processing unit, said wheels each comprising: an electronic unit fixed onto a rim of radius R and comprising two accelerometers ( 5 a , 5 b ) disposed perpendicular to one another and measuring the acceleration of the wheel in such a manner that one accelerometer ( 5 a ) measures a radial component F 1 of the acceleration, and that the other accelerometer ( 5 b ) measures a tangential component F 2 of the acceleration; the acceleration measurements from the two accelerometers being out of phase by a predetermined phase-shift angle α, a microprocessor, said method comprising the following steps: I) measurement, per wheel rotation, at given intervals of time (Tmeasurement), of a number (N) of acceleration values by each of the accelerometers ( 5 a , 5 b ), II) calculation by the microprocessor of a physical value (P) representative of the sign of the phase-shift angle between the two accelerometers, III) determination by the central processing unit of the vehicle of the lateral position of the wheel using the physical value (P) representative of the sign of the phase-shift angle, the method being characterized in that during the step I: a minimum number (N) of acceleration measurements is set per wheel rotation needed for the calculation of the sign of the phase-shift angle, and the intervals of time (Tmeasurement) between two acceleration measurements are determined by the following equation: T measurement = 2 ⁢ π · R F 1 N .