AIRmatic valve unit suspension strut, function - GF32.31-P-4502-01E
Illustration shows left front suspension strut of model 211.
The vehicle weight is borne by the compressible air enclosed in the air bellows of the suspension struts. The air is in the air chamber and in the additional volume container (Figure a).
Lifting/lowering the vehicle level takes place by increasing/reducing the air pressure in the air chamber and in the additional volume container by level valve (Y51/1y2), which results in a shortening/lengthening of the suspension strut (40).
As soon as the traffic situation requires it, the additional volume valve (Y51/1y1) in the AIRmatic suspension strut valve unit (Y51/1) is closed (Figure b). This leads to a taut vehicle suspension.