Method for exchanging signals between a tire pressure sensor and a central processing unit in a motor vehicle

A method of transmitting information in wireless manner by radio signals between a pressure sensor equipping a wheel of a motor vehicle and a central processor unit equipping said vehicle, in which method the sensor transmits, for the attention of the central processor unit, firstly signals representative of digital data to be transferred to the central processor unit, and secondly a location signal used by the central processor unit to identify the vehicle wheel from which the digital data is coming,

• wherein the emission power of the location signal is lower than the emission power of the data transmission signals and/or the duration of the location signal is adjusted in such a manner that the higher the speed of the vehicle the shorter the duration of the location signal,
• wherein the location signal has an amplitude that is smaller than the amplitude of the data transmission signals.

A method of transmitting information in wireless manner by radio signals between a pressure sensor equipping a wheel of a motor vehicle and a central processor unit equipping said vehicle, in which method the sensor transmits, for the attention of the central processor unit, firstly signals representative of digital data to be transferred to the central processor unit, and secondly a location signal used by the central processor unit to identify the vehicle wheel from which the digital data is coming,

• wherein the emission power of the location signal is lower than the emission power of the data transmission signals and/or the duration of the location signal is adjusted in such a manner that the higher the speed of the vehicle the shorter the duration of the location signal,
• wherein the location signal is made up of pulses that have durations shorter than the durations of the pulses forming the data transmission signals.