Patent ID: 6824143
Filing Date: 2004-11-30
Classification: B60G,F16F

Abstract:
An air suspension system for a vehicle, the system comprising:a vertically expandable bellows; a valve body mounted within an inner upper portion of the bellows and provided with communicating passages for supplying pressurized air into the bellows or for discharging the pressurized air out of the bellows; wherein the valve body comprises an inlet port for receiving the pressurized air; an exhaust port for communicating with atmosphere; a first communication passage so formed to infuse high-pressure air from the inlet port into the valve body; a second communication passage connected to an interior of the valve body from the exhaust port to communicate with the first communicating passage; a third communicating passage branched from the second communicating passage at a place higher than a place where the second communicating passage communicates with the first communicating passage to thereby communicate with the interior of the bellows; and a valve operating means for switching an open/close state of the communicating passages in response to the relative movement of the piston and the valve body, wherein the second communicating passage is formed to allow the valve operating means to slidably be inserted therein.