A tire pressure monitoring sensor comprises an environmental pressure sensor, a non-volatile memory for storing a first program and a second program, a processing unit for executing the first program, a communication module including a wireless transmitter for transmitting at least one parameter indicative of conditions within a tire and a wireless or wired receiver for loading the second program into the non-volatile memory and a battery for powering the sensor. The second program contains a sensor operation description which is used by the first program.

At least one embodiment relates to a concrete mixing truck includes a chassis, a front axle and a rear axle coupled to the chassis, a lift axle coupled to the chassis and including a tractive element, a lift actuator coupled to the lift axle, a mixing drum rotatably coupled to the chassis, a fill level sensor coupled to the mixing drum and configured to provide a signal indicative of a fill level of a material within the mixing drum, and a controller. The lift axle is selectively repositionable between a lowered position in which the tractive element engages a support surface and a raised position. The controller is operatively coupled to the lift actuator and the fill level sensor and configured to control the lift actuator to reposition the lift axle into the lowered position in response to the fill level exceeding a threshold fill level.

A method of setting the rides height of the air springs and air pressures of the tires, including receiving a user selected setting or preprogrammed ride height settings; sensing a ride height of, and air pressure within, each of the air springs; determining the weight of the vehicle based on the sensed ride height and air pressure within each of the air springs; providing specified ride heights for the left and right front and rear air springs; determining specified air pressures for the left and right front and rear tire inflators, based upon the determined weight of the vehicle and selected setting; inflating the left and right front and rear air springs to the specified ride heights; and inflating the left and right front and rear tires to the specified air pressures.

A tire pressure control device configured to be arranged in a vehicle includes a processing unit, a linking assembly, an air compressor, a drive switch assembly, a tire pressure measurer, and an inflation assembly. The linking assembly is connected to a wheel driving shaft of the vehicle and can be driven along with the rotation of the wheel driving shaft so as to drive the air compressor to generate a compressed air that is stored in a gas storage cylinder. The processing unit can control an air valve switch assembly of the inflation assembly to be open according to a tire pressure data measured by the tire pressure measurer so that the compressed air in the gas storage cylinder enters the tires of the wheels to increase the tire pressure of the wheels.

A wheel pressure adjustment assembly includes a valve unit that is fluidly coupled to a vehicle wheel. The valve unit is actuatable in an open condition for passing air therethrough to deflate the vehicle wheel. The valve unit is actuatable in a closed condition for inhibiting air from passing therethrough to retain air pressure in the vehicle wheel at a selected pressure. The valve unit is actuatable into an inflating condition for passing air into the vehicle wheel. A compressor is coupled to the valve unit and the compressor is turned on when the valve unit is actuated into the inflating condition. In this way the compressor inflates the vehicle wheel.

A wheel assembly includes a wheel having an outer rim and a hub. A first coupling is applied to the hub. A non-return valve is housed in the first coupling, and a second fitting is applied separably between the hub and the outer rim to connect the outlet of the hub hole with the channel hole.

A check joint structure for a connection of an air nozzle of a tire and a connection hose of an air compressor, the air compressor contains: a box, a sealant supply can, and a connection hose. The box includes a body of the air compressor. The sealant supply can includes an open segment and a supply tube. The connection hose includes a first segment and a second segment. The second segment has a check connector which includes a fitting sleeve, and the fitting sleeve has a threaded orifice, a through orifice, and a projected shoulder. A cylindrical base includes a cylindrical room, a stepped coupling segment, a conduit, and a first stepped portion. A first spring is received into the cylindrical room to abut against the first stepped portion. A valve bolt includes a contacting element, at least one cutout, a head, a conical rib, and a neck.

A tire pressure control device configured to be arranged in a vehicle includes a processing unit, a linking assembly, an air compressor, a drive switch assembly, a tire pressure measurer, and an inflation assembly. The linking assembly is connected to a wheel driving shaft of the vehicle and can be driven along with the rotation of the wheel driving shaft so as to drive the air compressor to generate a compressed air that is stored in a gas storage cylinder. The processing unit can control an air valve switch assembly of the inflation assembly to be open according to a tire pressure data measured by the tire pressure measurer so that the compressed air in the gas storage cylinder enters the tires of the wheels to increase the tire pressure of the wheels.

An axle assembly for a work vehicle includes: a frame housing; a differential housed in the frame housing; an axle carrier coupled to the frame housing; an axle partially disposed in the axle carrier and coupled to the differential; and a tire inflation pack including: a fixed portion coupled to the axle carrier and comprising a pack fluid inlet that is configured to fluidly couple to a pressurized gas source and a fixed opening holding the axle therein, the fixed portion being configured to allow rotation of the axle in the fixed opening without rotating; and a rotatable portion rotatably coupled to the fixed portion and comprising a pack fluid outlet that is fluidly coupled to the pack fluid inlet and a rotatable opening holding the axle therein, the rotatable portion being fluidly sealed with the fixed portion and configured to rotate with the axle.

A method of decreasing tire pressure includes opening a wheel valve (22) to allow pressurized air from a tire (10) to be directed to a first valve assembly (14) and to atmosphere. A target pressure is selected for a fluid control conduit (28). The fluid conduit (28) is in fluid communication with the first valve assembly (14) and a second or control valve assembly (30). The pressure in the fluid conduit (28) is measured. If the measured pressure is greater than the target pressure, then the second valve assembly (30) is de-energized. If the measured pressure is less than the target pressure, then the second valve assembly (30) is energized. A valve (42) prone to leak under very low temperatures may be subjected to repeated cycles of pressure application and pressure release in order to form a fluid-tight seal.