A tire rolling resistance estimation system estimates a real-time rolling resistance coefficient of a tire, and includes a tire sensor unit that measures a tire inflation pressure and a tire temperature. A processor is in electronic communication with the tire sensor unit. A steady state coefficient determination module in communication with the processor determines a steady state rolling resistance coefficient of the tire. A steady state tire temperature module in communication with the processor receives the steady state rolling resistance coefficient of the tire and estimates a steady state tire temperature of the tire. A real-time rolling resistance coefficient module in communication with the processor receives the steady state tire temperature of the tire and estimates a real-time rolling resistance coefficient of the tire from the steady state rolling resistance coefficient and a difference between the steady state tire temperature and a current tire temperature from the tire sensor unit.

A tire condition monitoring apparatus includes a tire-based sensor configured to sense tire operating conditions and transmit a tire condition signal including the sensed tire operating conditions. The apparatus also includes a vehicle-based controller configured to receive the tire condition signal and monitor the tire operating conditions. At least one of the sensor and the controller are configured to determine that a tire pressure adjustment condition exists in response to determining, based on the sensed operating conditions, that a predetermined change in the number of moles of air in the tire has taken place.

A tire pressure monitoring system (TPMS) and TPMS sensor module are provide. The TPMS sensor module includes a pressure sensor configured to measure an internal air pressure of a tire and generate tire pressure information, a microcontroller unit electrically connected to the pressure sensor, and a transceiver electrically connected to the microcontroller unit, the transceiver configured to transmit a message including the pressure information, further configured to receive an acknowledgement in response to the transmitted message. Where, on a condition that the transceiver receives the acknowledgement, the microcontroller unit is configured to set the transceiver into a standby mode, and, where, on a condition that the transceiver does not receive the acknowledgement, the microcontroller unit is configured to instruct the transceiver to transmit a redundant message that is redundant to the transmitted message, and the transceiver is configured to transmit the redundant message.

An air supply system on a vehicle having a tire. The system includes a compressor having a supply mode for supplying air to a consumer connected to the compressor. The consumer is provided with a reservoir and the compressor switches to an idle mode when the pressure of the reservoir attains a first predetermined reservoir pressure. During a supply period when the consumer is supplied with air from the compressor, the pressure of at least one tire is measured and prior to a subsequent tire pressure measurement, air is discharged from the reservoir so that the compressor remains in the supply mode and the consumer and/or reservoir continues to be supplied with air.

A tire inflation optimization apparatus configured to determine an optimum inflation pressure for a tire installed on an aircraft is disclosed. The apparatus includes a memory and a controller. The memory stores information relating tire gas properties to aircraft schedule parameters and a reference pressure for the tire. The controller is configured to receive future schedule information indicative of a future flight schedule for the aircraft and to determine an optimum inflation pressure for the tire based on the received future schedule information, the stored information relating tire gas properties to aircraft schedule parameters, and the stored reference pressure.

Provided is an onboard storage device and an onboard storage system that can correctly store identification information of communication devices provided in the tires of the own vehicle even if tire rotation, tire replacement, or the like is performed. A monitoring device detects the existence or absence of a situation in which another vehicle is not present in the periphery of the vehicle. If the monitoring device detects the existence of a situation in which another vehicle is not present, the monitoring device transmits, to each of multiple detection devices that are respectively provided in the tires of the vehicle, a request signal that requests the sensor ID of the detection device. The monitoring device receives the sensor IDs that are transmitted by the detection devices in accordance with the request signals, and stores the received sensor IDs in a sensor ID table.

A method includes an initial trailer health assessment and real-time trailer health monitoring. The initial trailer health assessment includes autonomous pre-trip maneuvers of the autonomous vehicle during a first time period, and detecting a pre-trip vehicle health condition. A vehicle health score is calculated based on the pre-trip vehicle health condition. If the vehicle health score is at least a threshold value, real-time trailer health monitoring is performed during a trip of the autonomous vehicle during a second time period, by actively monitoring vehicle dynamics data and/or image data associated with the autonomous vehicle, to determine a fault condition of the autonomous vehicle. If the fault condition meets a first criteria, a control parameter and/or a travel plan of the autonomous vehicle is adjusted. If the fault condition meets a second criteria different from the first criteria, a signal is sent to cause the autonomous vehicle to cease movement.

A multi air chamber tire 1 includes a partition wall 30 configured to define and form a plurality of air chambers 20 disposed adjacent to each other in an inner cavity of a tire, and a ventilation member 10 provided to the partition wall 30, and configured to connect the plurality of air chambers 20 in a state where ventilation is allowed. The ventilation member 10 allows ventilation between the plurality of air chambers 20 when a predetermined condition is satisfied indicating that fluid is being injected into at least one of the plurality of air chambers 20 from outside of the tire, and the ventilation member 10 shuts off the ventilation between the plurality of air chambers 20 when the predetermined condition is not satisfied.

A method for monitoring an air pressure in at least one tire of a motor vehicle, wherein at least one air pressure in the tire is detected by at least one measuring electronics unit present in the tire and data is transmitted by the measuring electronics unit to a control unit. Depending on the data, the control unit activates components of the motor vehicle to generate optical and/or acoustic signals. The control unit is switched into an after-running mode for a defined period of time when an ignition of the motor vehicle is shut off, in which mode the control unit can continue to receive data from the measuring electronics unit and may activate components of the motor vehicle to generate optical and/or acoustic signals.

A pressure of a spare tire of a vehicle is determined. Whether the spare tire is installed is determined based at least in part on the pressure. A vehicle subsystem is actuated based at least in part on whether the spare tire is installed.