Method for lateral localization of the wheels of a vehicle

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 (5a, 5b) disposed perpendicular to one another and measuring the acceleration of the wheel in such a manner that one accelerometer (5a) measures a radial component F1 of the acceleration, and that the other accelerometer (5b) measures a tangential component F2 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 (5a, 5b),
• 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
• .