Method for the hands-free access to a motor vehicle and for monitoring the pressure of the tires mounted on said motor vehicle
First Claim
1. A method for hands-free access to a motor vehicle and for monitoring pressure of tires mounted on said vehicle, comprising the following steps:
- transmitting low frequency signals by antennas associated with a hands-free access system of the vehicle,receiving the transmitted low frequency signals by a portable element associated with the hands-free access system and by wheel units mounted on each of the wheels of the vehicle and associated with a tire pressure monitoring system,transmitting from the portable element a response message to the vehicle, said message comprising at least one identifying code enabling a central unit forming part of the hands-free access system to verify whether the portable element is paired with the vehicle, and, if so,ceasing the transmissions of the low frequency signals by the antennas associated with the hands-free vehicle access system,detecting via low frequency receiving antennas of the wheel units of the tire pressure monitoring system the cessation of the transmission of the low frequency signals, andupon detection of the cessation of the transmission of the low frequency signals and independent of an ignition status for an engine of the vehicle, automaticallymeasuring via the tire pressure monitoring system the pressure and/or temperature values prevailing within each tire, andtransmitting in a direction of a tire pressure monitoring central unit mounted in the vehicle the measured pressure and/or temperature values in order to provide a driver with this information.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
14 Citations
10 Claims
-
1. A method for hands-free access to a motor vehicle and for monitoring pressure of tires mounted on said vehicle, comprising the following steps:
-
transmitting low frequency signals by antennas associated with a hands-free access system of the vehicle, receiving the transmitted low frequency signals by a portable element associated with the hands-free access system and by wheel units mounted on each of the wheels of the vehicle and associated with a tire pressure monitoring system, transmitting from the portable element a response message to the vehicle, said message comprising at least one identifying code enabling a central unit forming part of the hands-free access system to verify whether the portable element is paired with the vehicle, and, if so, ceasing the transmissions of the low frequency signals by the antennas associated with the hands-free vehicle access system, detecting via low frequency receiving antennas of the wheel units of the tire pressure monitoring system the cessation of the transmission of the low frequency signals, and upon detection of the cessation of the transmission of the low frequency signals and independent of an ignition status for an engine of the vehicle, automatically measuring via the tire pressure monitoring system the pressure and/or temperature values prevailing within each tire, and transmitting in a direction of a tire pressure monitoring central unit mounted in the vehicle the measured pressure and/or temperature values in order to provide a driver with this information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification