Patent ID: 6871157

Claim:
A process for automatically locating the wheels of a motor vehicle, said vehicle comprising a wheel unit integral with each of the wheels of the vehicle and a central computation unit disposed in the vehicle; said process comprising the following steps: transmitting by the wheel unit high-frequency signals representative, at least, of the pressure of the wheel on which the wheel unit is mounted, and a code identifying the wheel; receiving by the central computation unit the high-frequency signals transmitted by the wheel unit; transmitting an uncoded low-frequency signal by at least one transmission device comprising antennas disposed in the doors of the vehicle and used in addition, by a device for remotely locking/unlocking said doors; said transmission device being mounted on the vehicle in proximity to the wheels according to a predetermined position, in such a way as to wake up the wheel units placed in proximity; receiving said uncoded low-frequency signal by the wheel units, and in response thereto, transmitting a high-frequency signal by the woken-up wheels; said high-frequency signal comprising at least the code identifying the woken-up wheels; and receiving the high-frequency signal by the central unit, and associating the code identifying the woken-up wheel units, with the position of the transmission device or devices.