Abstract: An inflation electronic control module for a tire inflation system is described. The inflation electronic control module may be configured to initiate a warning that indicates a problem with a vehicle tire based on tire inflation fill events and collected fill event data. Automatic tire inflation and data recording systems including an inflation electronic control module are further described. The control module may include an electronic control board configured for recording a log of fill event data for tire inflation fill events, the electronic control board being configured for wireless transmission of fill event data to a remote computer.

Abstract: A vehicle fluid supply system includes a fluid supply valve configured to control fluid flow from a vehicle fluid supply to a trunk conduit in fluid communication with a vehicle tire inflation system; and a lift axle valve configured to control fluid flow from the trunk conduit to a lift axle deployment system.

Abstract: A vent for a hub cap may include a screen and fluid channels for release of pressurized fluid in a hub cap.

Abstract: An inflation electronic control module for a tire inflation system is described. The inflation electronic control module may be configured to initiate a warning that indicates a problem with a vehicle tire based on tire inflation fill events and collected fill event data. Automatic tire inflation and data recording systems including an inflation electronic control module are further described. The control module may include an electronic control board configured for recording a log of fill event data for tire inflation fill events, the electronic control board being configured for wireless transmission of fill event data to a remote computer.

Abstract: An inflation electronic control module for a tire inflation system comprising a solenoid valve disposed so as to selectively open or close fluid communication between a fluid pressure source and a vehicle tire in response to one or more pressure signals. The tire inflation system further comprising a fluid pressure sensor disposed so as to detect delivery-side fluid pressure between the solenoid valve and the vehicle tire, and provide a pressure signal corresponding to the detected fluid pressure.

Abstract: A rotary union is configured for removable disposition into the central bore of a hubcap through an orifice in the outboard face of the hubcap. The hubcap includes a fluid channel extending from the central bore to the exterior of the hubcap. The rotary union includes a port through which fluid may flow into the fluid channel when the rotary union is disposed in the central bore.

Abstract: A pneumatic lift axle control system includes a plurality of valves configured to receive first fluid pressure from a first fluid supply and to receive second fluid pressure from a second fluid supply, and to selectively communicate the first fluid pressure or the second fluid pressure as a pilot signal to a lift axle actuator valve.

Abstract: A vehicle fluid supply system includes a fluid supply valve configured to control fluid flow from a vehicle fluid supply to a trunk conduit in fluid communication with a vehicle tire inflation system; and a lift axle valve configured to control fluid flow from the trunk conduit to a lift axle deployment system.

Abstract: A pressure equalization valve assembly may include a valve body forming fluid chamber configured to receive pressurized fluid from a fluid pressure source, a first port configured for sealed communication with a first vehicle tire, and a second port configured for sealed communication with a second vehicle tire; a first one-way valve disposed in the valve body between the fluid chamber and the first port so as to allow one-way fluid communication from the fluid chamber to the first port when the first one-way valve opens; a second one-way valve disposed in the valve body between the fluid chamber and the second port so as to allow one-way fluid communication from the fluid chamber to the second port when the second one-way valve opens; and a two-way valve disposed in the valve body between the first port and the second port so as to allow two-way fluid communication between the first port and the second port when the two-way valve opens.

Abstract: An inflation electronic control module for a tire inflation system comprising a solenoid valve disposed so as to selectively open or close fluid communication between a fluid pressure source and a vehicle tire in response to one or more pressure signals. The tire inflation system further comprising a fluid pressure sensor disposed so as to detect delivery-side fluid pressure between the solenoid valve and the vehicle tire, and provide a pressure signal corresponding to the detected fluid pressure.

Abstract: A vent for a hub cap may include a screen and fluid channels for release of pressurized fluid in a hub cap.

Abstract: A valve assembly may have an inlet configured to receive pressurized fluid, a first port, a diaphragm comprising a first side and an opposing second side, a first one-way valve disposed so as to allow fluid to flow from the inlet to the first side of the diaphragm, and a second one-way valve disposed so as to allow fluid to flow from the inlet to the first port. The first side of the diaphragm may be in fluid communication with the first port and with atmosphere, and the second side may be in fluid communication with the first one-way valve, the diaphragm sealing the first port from the first one-way valve and from atmosphere, such that when fluid pressure in the first port exceeds the fluid pressure at the first valve, the diaphragm may flex to allow fluid to flow from the first port to atmosphere.

Abstract: A valve assembly may have an inlet configured to receive pressurized fluid, a first port, a diaphragm comprising a first side and an opposing second side, a first one-way valve disposed so as to allow fluid to flow from the inlet to the first side of the diaphragm, and a second one-way valve disposed so as to allow fluid to flow from the inlet to the first port. The first side of the diaphragm may be in fluid communication with the first port and with atmosphere, and the second side may be in fluid communication with the first one-way valve, the diaphragm sealing the first port from the first one-way valve and from atmosphere, such that when fluid pressure in the first port exceeds the fluid pressure at the first valve, the diaphragm may flex to allow fluid to flow from the first port to atmosphere.