An onboard inflation system for a vehicle such as an agricultural vehicle is disclosed, including a tire mounted on a wheel to form a wheel and tire assembly. The tire includes a tread portion and a tire cavity including an inflation chamber adjacent the tread portion of the tire. A storage chamber is carried by at least one of the wheel and the tire. A compressor arrangement is communicated with both the storage chamber and the inflation chamber. The compressor arrangement is configured to transfer air between the storage chamber and the inflation chamber.

An in-wheel tire pressure system for use with a rim of a wheel of a vehicle that includes a fluid storage area formed in the rim for holding a quantity of compressible fluid suitable for inflating a tire mounted on the rim, and a micro-compressor mounted on the rim for pressurizing the fluid storage area with the compressible fluid. A wireless electrical charging subsystem may also be included for powering the micro-compressor. The wireless electrical charging system may incorporate a first component associated with the rim and rotatable with the rim, and a second component fixedly mounted to a portion of the vehicle closely adjacent the first component. The system may also include a control for enabling user control over the micro-compressor.

An in-wheel tire pressure system for use with a rim of a wheel of a vehicle that includes a fluid storage area formed in the rim for holding a quantity of compressible fluid suitable for inflating a tire mounted on the rim, and a micro-compressor mounted on the rim for pressurizing the fluid storage area with the compressible fluid. A wireless electrical charging subsystem may also be included for powering the micro-compressor. The wireless electrical charging system may incorporate a first component associated with the rim and rotatable with the rim, and a second component fixedly mounted to a portion of the vehicle closely adjacent the first component. The system may also include a control for enabling user control over the micro-compressor.

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 custom valve stem is adapted to fit in a conventional valve stem opening in a tire rim. The valve stem has a primary air channel for a conventional Schrader-type valve. The valve stem also has a secondary air channel extending within the valve stem between a base of the valve stem and an outlet through the material of the valve stem to atmosphere outside of the valve stem. The outlet can have a screen as a debris air filter. An optional tire pressure monitoring system TPMS sensor couples to the primary air channel independent of the secondary air channel. The secondary air channel comprises an atmospheric hose coupled to an electric air compressor and rechargeable battery disposed within a pressure cavity of the tire for maintaining tire pressure. A motion activated power generator disposed within the pressure cavity recharges the rechargeable electric storage.

Systems and methods are provided for providing a tire pressure enhancing device for increasing the air pressure of tires mounted on a vehicle. For example, an air compressor may be coupled to an engine of a vehicle to compress air. The compressed air is then stored in the frame of the vehicle. The compressed air may be transferred to each tire through a hose via an access point in the frame.

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 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 method for the weight-dependent control of the internal pressure of a supporting body loaded by a weight load or payload, wherein the internal pressure is produced by means of an electric-motor-driven compressor, and the weight load or payload which is present and which acts on a supporting body in the form of a mass m.sub.Load under the effect of acceleration due to gravity g is determined in that a reduction and a subsequent increase in the internal pressure take place, wherein the increase in the internal pressure causes the position of an application point of the weight load or payload to change by a position difference Z, wherein:

during the increasing of the internal pressure by means of the compressor, the motor current I.sub.Load of the drive motor of the compressor is measured with a constant motor voltage U and integrated over the time of the increase in pressure, and the electrical work W.sub.Load which is necessary for the change in position is determined therefrom,

wherein the electrical work W.sub.Load the electrical work W.sub.Load is compared with a characteristic value of the electrical work W.sub.0 from a characteristic diagram, wherein the change in position Z, the difference in mass m and the difference in payload F.sub.Z are determined from the difference W between W.sub.Load and W.sub.0 and the mass m.sub.Load and the weight load or payload which is actually present as a result is determined therefrom.

The present invention provides a bicycle tool storage device mountable in a bicycle headset assembly and/or a bicycle pump. A top cap for loading a headset assembly and mounting the device is also provided. The top cap includes an annular body and a device receiving aperture extending through the body. The top cap includes a flange extending radially outwardly from a first end of the body and a ridge defined in an inner surface of the body adjacent to the flange. The ridge is concentrically aligned with the aperture for retaining the device. Further still, a bicycle pump for mounting the device is provided. The pump includes a pump body, a handle, a pump head, and a flange. The pump body houses a plunger and a piston. The plunger and handle define a cavity for receiving the device. The handle further defines a flange for retaining the device.