A tire inflation system for use with a vehicle includes an airflow regulator configured to adjust a tire pressure of an inflatable tire coupled to an axle included in a wheel-axle system of a vehicle. The tire inflation system may further include a controller including a processor and a memory, the memory having stored therein a plurality of instructions that when executed by the processor cause the controller to receive data indicative of a force load acting on the axle and adjust the airflow regulator to cause the airflow regulator to control the tire pressure of the inflatable tire based on the data indicative of the force load acting on the axle.

A valve assembly for a tire inflation/deflation system includes a body having a control port and a tire port, and a valve member for fluidly connecting or disconnecting the control port with the tire port. In one embodiment, the valve includes a fluid-operated damper having a damper chamber for controlling a timing of the valve member. A vent valve is provided for permitting excess fluid pressure to escape from the damper chamber. In another embodiment, the valve member includes a diaphragm separating first and second fluid chambers. A vent passage and at least one resilient fluid pressure-operated valve element are provided for enabling fluid to vent from the first chamber to the second chamber. Multiple-redundant valve elements may be provided to form an isolation gap that restricts contamination of the valve assembly.

Disclosed herein are devices and systems for continuous control of tire pressure. In one aspect, a device for continuously controlling tire pressure includes a bracket, a fixed non-rotating member fixedly attached to the bracket, and a non-fixed rotating member rotatably attached thereto. The fixed non-rotating member has at least one first seal surface, the at least one seal surface configured to be in fluid communication with a compressed air source. The non-fixed rotating member has at least one second seal surface, wherein an air chamber defined within a volume between interacting the at least one first seal surface and the at least one second seal surface causes fluid communication between an interior space of the tire and the compressed air source.

An agricultural vehicle and method of controlling the same are provided, the vehicle having a motive power unit providing a driving torque to at least one driven wheel and having at least one tyre or track frictionally coupled with the periphery of the driven wheel. A vehicle operating parameter is controlled in dependence on the driving torque and a slippage characteristic relating the respective driving torque at which the frictional coupling between driven wheel and tyre or track begins to slip for a range of vehicle operating parameter values. The operating parameter is suitably a tyre pressure or track tension, and the control may involve reducing driving torque or increasing pressure/tension to prevent slipping.

A central tire inflation/deflation system (CTIS) with a novel valve that may deflate more quickly and may deflate to a lower pressure than the previously known central tire inflation/deflation system valves. Also, the present valve may not be temperature sensitive, at least because the present valve does not require trapped air behind a diaphragm to operate the valve. The present valve may be placed into existing CTIS's in place of existing valves, without modifying pneumatic lines of the existing CTIS's. Thus, the present valve may be operated by a single fluid flow line, receive pressure from the single fluid flow line, and exhaust to the single fluid flow line. A second communication line, either a pneumatic pilot line or an electrical line, is not necessary, which allows the present valve to be retrofit into an existing CTIS without adding weight or complication from additional components.

A high temperature warning system for a vehicle steer axle an air pressure supply, a normally-closed valve in fluid communication with pressure supply, a heat sensitive control capable of opening the normally-closed valve upon a predetermined temperature, the heat sensitive control mounted adjacent to the wheel end assembly in a heat exchange relationship therewith, and a warning system connected to the air pressure supply for actuation upon opening of the normally-closed valve.

An Automatic Tire Inflation System (ATIS) for use with a vehicle includes a controller, valves controlled by the controller and, for at least one drive axle having inner bearings and outer bearings, a channel formed in a spindle, first hosing coupling controlled by the controller to the channel formed in the spindle, a channel formed in a hub, a rotary air seal coupling the channel formed in the spindle to the channel formed in the hub, and second hosing coupling the channel formed in the hub to at least one wheel. The rotary air seal may transition from a sealed state that forms a seal between the spindle and the hub to support air flow between the channel formed in the spindle and the channel formed in hub and reside in an unsealed state to negate the seal between the spindle and the hub.

A tire inflation system for a small trailer may include a fluid pressure source mountable to the trailer, and fluid conduits providing sealed fluid communication between the fluid pressure source and the small trailer's pneumatic tires. The system may further include a fluid connector configured for connection to an external fluid power source.

An inflator disposed within a tubeless tire for inflating the tubeless tire. A rechargeable electric storage disposed within a tubeless for providing electricity. An electric air compressor is mounted on an inside surface of the rim of the tubeless tire within the pressure cavity of the tubeless tire. The electric air compressor and an air pressure sensor disposed within the tubeless tire runs by a controller. The electric air compressor has a compressed air inlet vented to atmosphere in a custom valve stem through a conventional hole of a valve stem in the rim of the tubeless tire. A motion activated power generator recharges the rechargeable electric storage. A short-range radio transmits measured pressure data for each tire to a central OBD module plugged into in the vehicle. The central OBD module connects through a smartphone indirectly or directly to a central server via a networked cellular radio tower.

A pressure medium supply device for a tire of a wheel unit, a wheel unit, and a valve arrangement for a rotationally fixed transition of a pressure medium supply device for a wheel unit are provided. The valve arrangement has a housing part through which a pressure medium can flow, a control piston, in particular an axially movable control piston which is received on the housing part, and a discharge element with an outlet for conducting the pressure medium. The housing part and the discharge element are received in a rotatable manner relative to each other. The control piston has a flow channel for the pressure medium, has a force application surface to which the pressure medium can be applied, and can be moved between a disengaged position and an engaged position. A pressure medium line can be established between the housing part and the discharge element in the engaged position.