A radio-transmitting sensor for a vehicle wheel, suitable for measuring at least one physical quantity and for transmitting a radio signal representative of this measured physical quantity. The sensor includes a measurement and transmission circuit, an antenna impedance matching circuit, and an antenna circuit. The sensor includes a sensitivity switch controlled by the measurement and transmission circuit and suitable for switching the antenna circuit according to two modes: a dynamic mode in which the antenna circuit is configured as a magnetic antenna, and in which the sensor transmits said radio signal representative of the measured physical quantity, this signal including transmitted data frames; and a static mode in which the antenna circuit is configured as an electric antenna.

A wheel unit for a system for transmitting data from the wheel unit to a receiver of a vehicle. The wheel unit is configured for mounting to a wheel of the vehicle, and the wheel unit includes the following: a memory for storing wheel type data related to the type of the wheel at which the wheel unit is mounted; a processor for processing the wheel type data stored in the memory; a transmitter for RF-transmitting data telegrams to a vehicle-mounted receiver. The processor determines an RF power value based on the stored wheel type data, and the transmitter transmits the data telegrams with an RF power based on the determined RF power value.

A method for controlling an electronic valve for a tire of a motor vehicle including an electronic assembly of sensors and a bidirectional radiofrequency communication assembly, connected to the electronic assembly of sensors. This method is noteworthy in that: in a parked situation and in the effective absence of a user, the electronic assembly of sensors is kept dormant and the communication assembly is kept on standby, and on the arrival of a user, the electronic assembly of sensors is activated by the communication assembly.

A method of detecting a leak from a tire of a vehicle, the tire including a member for measuring the pressure and the temperature having a driving operating mode and a stationary operating mode, comprising determining that the vehicle is stationary; and then launching the stationary operating mode to detect when the vehicle is stationary the presence or the absence of a leak of inflating gas from the tire.

At a control circuit of a TPM sensor, one or more of a first adjustment to the periodicity, a second adjustment to the content, and a third adjustment to the length of a message are determined based upon the operational history of the sensor. The adjustments are applied to the messages and adjusted messages are transmitted.

A system includes a computer having a processor and a memory storing instructions executable by the processor to acquire a first image of a tire of a vehicle upon shutdown of the vehicle. The instructions include instruction to then, upon startup of the vehicle, and in response to determining that the tire is unmoved since the shutdown and, in response, acquire a second image of the tire. The instructions include instruction to actuate a component of the vehicle in response to determining that the first image is different that the second image.

An electronic wheel unit for detecting a tire pressure of a tire of a vehicle wheel, for storing tire information of the tire and for sending tire pressure information and tire information. The wheel unit is configured to allow the alteration of stored tire information in a first mode of operation and to prevent the alteration of stored tire information in a second mode of operation. To improve the integrity and safety of the stored tire information in this case, the wheel unit is further configured to change from the first mode of operation to the second mode of operation when a first mode change criterion is satisfied. The satisfaction of the first mode change criterion is dependent at least on an operating parameter of the vehicle wheel that is representative of a rotational movement of the vehicle wheel.

According to one embodiment, a method of improved communication between a wheel unit sensor and a master controller is disclosed. In this particular embodiment, the method includes determining, by the wheel unit sensor, whether a receive schedule of the wheel unit sensor indicates that a receive window has started. The method also includes in response to determining that the receive schedule indicates that the receive window has started, turning-on, by the wheel unit sensor, for the duration of the receive window, a wireless receiver of the wheel unit sensor. In this embodiment, the wireless receiver is configured to receive messages from the master controller.

A system includes a computer having a processor and a memory storing instructions executable by the processor to acquire a first image of a tire of a vehicle upon shutdown of the vehicle. The instructions include instruction to then, upon startup of the vehicle, and in response to determining that the tire is unmoved since the shutdown and, in response, acquire a second image of the tire. The instructions include instruction to actuate a component of the vehicle in response to determining that the first image is different that the second image.

A transmitter is mounted on each of a plurality of wheel assemblies included in a vehicle. The transmitter executes a process in accordance with a command included in a trigger signal. The transmitter includes a pressure sensor that detects the tire pressure, a transmission unit that transmits a data signal including a detection result of the pressure sensor to a receiver, a trigger reception unit that receives the trigger signal, and a controller that controls the transmitter. When the trigger reception unit receives the trigger signal including a command shifting a state of the transmitter to a standby state, the controller shifts the state of the transmitter to the standby state. Further, when the trigger reception unit receives the trigger signal including a command designating a mode while the state of the transmitter is the standby state, the controller sets the designated mode.