Abstract: A switching valve device in an air suspension system for such vehicles as automobiles, wherein a plurality of primary air chambers are provided above a shock absorber, which are connected or disconnected with each other to adjust the air spring constant for such vehicles as automobiles rotary valve is provided in the course of the path connecting the respective primary air chambers, and a decompression intercommunicating cushioning air chamber is formed between the rotary valve and a flow restriction stopper holding the rotary valve in place, such that the communication of the cushioning air chamber with one primary air chamber is opened and closed or controlled through the rotary valve, on the one hand, and such that its communication with another primary air chamber is through the flow restriction stopper, on the other hand, whereby a swish sound is prevented by the decompressing action of the cushioning air chamber.

Abstract: A construction of a control valve for an air suspension assembly having main and auxiliary air chambers and which include a boundary member disposed between the main and auxiliary air chambers and provided with a path for communicating both air chambers and a valve body disposed in the path. The path or the valve body includes a first path portion and a second path portion having a bore smaller than that of the first path portion. A perforated member is provided in relation with the second path portion of the path or valve body.