A wheel-mounted air compression apparatus for maintaining a predetermined inflation pressure of a tire mounted on a wheel of a vehicle and the tire having an inflation port includes a housing defining an air compression chamber and has an air compressor device positioned therein. The apparatus includes a plurality of support legs spaced apart from one another. Each support leg is attached to the housing and extends away therefrom and may include a pair of sleeves that are length-adjustable for mounting to wheels of various sizes. A pressure sensor is situated in the housing and operably connected to the air compressor and to a nozzle for determining a current pressure of air within the tire. A controller or other electronics cause the air compressor to pump air into a tire if the air pressure therein is detected as declining below a predetermined amount.

A tire air filling device according to one embodiment includes: a cylinder; a weight which has an air flow hole and which receives a centrifugal force to move and cause air to be supplied to an inside of a tire; a first sealing member; a first spring; a first support portion; and a backflow prevention valve. The backflow prevention valve includes a slide member that slides in the air flow hole in an axial direction, a second spring that biases the slide member to a side opposite the tire, a second support portion that supports an end portion of the second spring in the axial direction; and a second sealing member interposed between an inner surface of the air flow hole and the slide member. The slide member, the second spring, and the second support portion are disposed inside the weight.

The inflation system includes a pump and a dehumidifier fluidly connected between the pump and a reservoir, such as a tire.

The inflation system includes a pump and a dehumidifier fluidly connected between the pump and a reservoir, such as a tire.

A wheel-mounted air compression apparatus for maintaining a predetermined inflation pressure of a tire mounted on a wheel of a vehicle and the tire having an inflation port includes a housing defining an air compression chamber and has an air compressor device positioned therein. The apparatus includes a plurality of support legs spaced apart from one another. Each support leg is attached to the housing and extends away therefrom and may include a pair of sleeves that are length-adjustable for mounting to wheels of various sizes. A pressure sensor is situated in the housing and operably connected to the air compressor and to a nozzle for determining a current pressure of air within the tire. A controller or other electronics cause the air compressor to pump air into a tire if the air pressure therein is detected as declining below a predetermined amount.

The inflation system includes a pump and a dehumidifier fluidly connected between the pump and a reservoir, such as a tire.

The inflation system includes a pump and a dehumidifier fluidly connected between the pump and a reservoir, such as a tire.

The inflation system includes a pump and a dehumidifier fluidly connected between the pump and a reservoir, such as a tire.

The inflation system includes a pump and a dehumidifier fluidly connected between the pump and a reservoir, such as a tire.

The system can include: a wheel-mounted pump and a dehumidifying system arranged along the fluid path between the pump outlet and a tire inlet. In variants, the dehumidifying system includes a set of angled channels that aggregate water in radially-outward channel segments. The angled channels can be fluidly connected to a purge valve selectively fluidly connected to an ambient environment.