Air suspension installation, compressed air supply installation and pneumatic system

摘要

A pneumatic installation, especially an air suspension installation for a vehicle, operates in conjunction with a compressed air supply installation and comprises: a gallery line, at least one air spring having a pressure chamber, which can be pneumatically connected to the gallery line, an accumulator for compressed air, which is pneumatically connectable to the gallery line, and a compressed air port for pneumatic connection of the pneumatic installation and the compressed air supply installation. The pneumatic connection comprises a controllable shut-off valve system, which is formed by at least one directional valve and has first, second and third ports, the accumulator being pneumatically connected to the first port, the compressed air port being pneumatically connected to the second port, and the gallery line being pneumatically connected to the third port, the second port being switchable to a closed state in which the pneumatic connection is completely closed in both directions.

主权项

1. An air suspension system for a vehicle having a pneumatic system operable with a compressed air supply system, the air suspension system comprising:
a gallery line; and a plurality of bellows, each of the bellows being a pressure chamber for an air spring; and a controllable isolating valve assembly, the bellows being connected to the gallery line such that the pneumatic system is fillable and ventable to atmosphere from the compressed air supply system via the isolating valve assembly, the isolating valve assembly comprising:
(i) a first port pneumatically connected to a reservoir via a reservoir branch line;(ii) a second port bidirectionally connected to an air dryer of the compressed air supply system via a pneumatic line; and(iii) a third port pneumatically connected to the gallery line, wherein the isolating valve assembly is configured to adopt at least three switch positions, in at least one of the switch positions the second port of the isolating valve assembly being switchable into a closed state in which pneumatic connection between the gallery line and the air dryer is bidirectionally and fully closed.