A first tire pressure sensor module is configured to provide information related to a pressure of a tire of a vehicle and comprises a pressure sensor configured to determine the information related to the pressure of the tire. The pressure module further includes a controller configured to selectively operate the tire pressure sensor module in an active state and in an inactive state, wherein an energy consumption of the tire pressure sensor module is lower in the inactive state than in the active state. The controller is further configured to control an output of the information related to the pressure of the tire in the active state, and operate the tire pressure sensor module in the inactive state based on determining that information related to a velocity of the tire indicates a velocity above a threshold.

Method and apparatus are disclosed for activation of tire pressure measurement systems. An example vehicle includes a door including a handle sensor, a tire pressure measurement system (TPMS) sensor, a communication module, a display, and a controller. The controller is to activate the TPMS sensor responsive to detecting, via the handle sensor, engagement of a handle and collect, via the communication module, a measurement from the TPMS sensor upon activation. The controller also is to present, via the display, a low-pressure alert in response to determining the measurement is less than a threshold.

A method for saving in an electronic measurement module of a tire pressure monitoring system for a motor vehicle. According to the method, as soon as a module operating error occurs, the data contained in the non-volatile random-access memory of the electronic data module are written into the read-only memory.

A tire pressure monitoring system and tire pressure detector setting apparatus for tractor-trailer are disclosed. The tractor-trailer has a tractor and a trailer having a plurality of wheels, respectively. The tire pressure monitoring system includes a plurality of tire pressure detectors and a monitoring device. The tire pressure detectors are disposed on each of the wheels, detecting the tire pressure status of each wheel and generating a tire pressure information. Each tire pressure detector has a wheel code corresponding to one of the wheels, respectively. The monitoring device is disposed on the tractor for receiving the tire pressure information and the wheel codes of the corresponding tire pressure detector. When the tire pressure information and the wheel code are transmitted to the monitoring device, the monitoring device accurately monitors the tire pressure status of each wheel.

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.

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.

A first tire pressure sensor module is configured to provide information related to a pressure of a tire of a vehicle and comprises a pressure sensor configured to determine the information related to the pressure of the tire. The pressure module further includes a controller configured to selectively operate the tire pressure sensor module in an active state and in an inactive state, wherein an energy consumption of the tire pressure sensor module is lower in the inactive state than in the active state. The controller is further configured to control an output of the information related to the pressure of the tire in the active state, and operate the tire pressure sensor module in the inactive state based on determining that information related to a velocity of the tire indicates a velocity above a threshold.

A method for transmitting data from a wheel unit arranged on a wheel of a vehicle to a central unit of the vehicle, involving: sending the data in the form of temporally spaced data transmissions from the wheel unit to the central unit, transmission times of the data transmissions being stipulated by the wheel unit according to a transmission algorithm; and receiving the data transmissions sent by the wheel unit via the central unit is disclosed. The method may further comprise: evaluating reception times at which each of the data transmissions are received by the central unit, according to an evaluation algorithm making allowance for the transmission algorithm; and rating the data transmissions on the basis of a result of the evaluation of the reception times. Further, a corresponding apparatus for data transmission in a vehicle is disclosed.

A tire air pressure detection device includes a plurality of transceivers and a receiver. The plurality of transceivers are correspondingly provided in a plurality of wheels of a vehicle. Each wheel has a tire. The receiver is attached to a vehicle body. Each of the plurality of transceivers outputs a detection signal indicative of an air pressure of the tire of the corresponding wheel. Each of the plurality of transceivers processes the detection signal, and generates a frame storing the processed detection signal as data related to the air pressure of the tire. The receiver receives the frame. The receiver detects the air pressure of the tire based on the data stored in the received frame.

A tire air pressure detection system and a vehicle body side device to detect air pressure of a plurality of tires. The vehicle body side device causes a transmission unit to transmit to all tire side devices, a transmission stop signal instructing transition to a transmission stop state and then the transmission unit transmits a transmission standby signal at a transmission strength that enables the signal to reach the tire side devices; and then the transmission unit transmits to the one of the tire side devices, a transmission request signal requesting a transmission of a signal including a unique identifier stored in that tire side device; and when it is determined that a reception unit has received a response signal in response to the transmission request signal, the transmission unit transmits a transmission standby signal and a transmission request signal to the tire side device corresponding to the next tire.