Pneumatic suspension of a commercial vehicle with axle load switching between rear axle and leading or trailing axle

摘要

The air suspension system has a pressure switch (4) for detecting a bellows pressure of a driven rear axle. A control unit is provided to vary an axle ratio between driven rear axle and pre-and/or trailing axle (10) based on the detected bellows pressure. The two magnetic valves (5,6) in control line (7) of a shuttle valve (3), are connected parallely with each other through an electrical power suppliable changeover relay (8). The control line is operated or vented by the switching operation of the changeover relay in response to the bellows pressure of the rear axle.