| 摘要 |
<p>In some embodiments, a wheel end assembly may comprise a hubcap mounted to a wheel rotatable on an axle on a vehicle, an air pressure supply positioned inside the axle and connected to a pressure source on the vehicle, a rotary union mounted to the hubcap and in fluid communication with the air pressure supply, a valve stem mounted to the wheel, the valve stem including a valve and an auxiliary port, an air hose connected at a first end to the rotary union and at a second end to the valve stem so as to allow air to flow from the air pressure supply through the air hose to the valve stem, and a manually-operable, electrically-operable or automatic pressure reduction valve connected to the auxiliary port. The pressure reduction valve may comprise one of a metering, timed or deceleration valve, or other suitable valve allowing for relatively high air flow.</p> |
