METHOD FOR THE HANDS-FREE ACCESS TO A MOTOR VEHICLE AND FOR MONITORING THE PRESSURE OF THE TIRES MOUNTED ON SAID MOTOR VEHICLE

摘要

A method for the hands-free access to a motor vehicle (V) is combined with a method for monitoring tire pressure. More particularly, wheel units (20, 21, 22, 23) belonging to the tire pressure recognition system detect the cessation of low frequency LF transmissions caused by the recognition of a badge B paired with the vehicle in order to trigger the measurement via the wheel units of the pressure and temperature values prevailing in each tire of the vehicle. These pressure and temperature measurements are sent to a central unit (14), which is mounted on the vehicle, so as to provide the driver with this information. The temperature and pressure measurements are transmitted to the central unit as soon as the measurements have been taken, irrespective of whether or not the driver has entered the vehicle.

主权项

1. A method for the hands-free access to a motor vehicle (V) and for monitoring the pressure of the tires mounted on said vehicle, comprising the following steps:
transmitting (step 100) low frequency (LF) signals by means of antennas (15, 16, 17) associated with the hands-free access system of the vehicle, receiving the transmitted low frequency signals by means of a portable element (B) (step 200) associated with the hands-free access system and by means of the wheel units (step 300) mounted on each of the wheels of the vehicle and associated with the tire pressure monitoring system, transmitting via the portable element (B) a response message to the vehicle (step 210), said message comprising at least one identifying code (Id) enabling a central unit (14) forming part of the hands-free access system to verify whether the portable element (B) is paired with the vehicle (V), and, if so, ceasing the transmissions (step 230) of low frequency signals of the hands-free vehicle access system, said method being characterized in that it additionally comprises the following steps: detecting via the low frequency receiving antennas of the wheel units of the tire pressure monitoring system the cessation (step 300) of the transmission of low frequency signals by the vehicle access system, and measuring (step 310) via the tire pressure monitoring system the pressure and/or the temperature values prevailing within each tire, transmitting (step 320) in the direction of a tire pressure monitoring central unit mounted in the vehicle the measured pressure and temperature values in order to provide the driver with this information (step 330).