Compressed air supply installation and method for operating a pneumatic installation
AssigneeWABCO GmbH
InventorsDieter Frank, Frank Meissner, Uwe Stabenow
Life of this patent
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Abstract
A compressed air supply installation for operating a pneumatic installation, especially an air suspension installation of a vehicle, includes a compressed air supply unit, a compressed air port towards the pneumatic installation, a venting port towards the surroundings, a first pneumatic connection between the compressed air supply and the compressed air port, the first pneumatic connection having an air drier and a shut-off valve, and a second pneumatic connection between the compressed air port and the venting port. The shut-off valve is a pneumatically pilot-controlled check valve.
Claims33
A compressed air supply system for operating a pneumatic system of a vehicle, the compressed air supply system comprising:
- a compressed air feed;
- a compressed air port leading to the pneumatic system;
- a vent port to the environment;
- a vent line between the compressed air port and the vent port;
- a main pneumatic line between the compressed air feed and the compressed air port, the main pneumatic line including:
- an air dryer, and
- a pilot-operated non-return valve including:
- a control chamber divided into a control space and a venting space by a control piston and/or a seal on the control piston, and
- a venting chamber pneumatically connected to the vent line,
- wherein the pilot-operated non-return valve is configured to open automatically in a filling direction from the compressed air feed to the compressed air port and is further configured to be released to allow flow in a venting direction from the compressed air port to the compressed air feed, and
- wherein the venting chamber forms a portion of a vent valve formed as a unit of the pilot-operated non-return valve.
A compressed air supply system for operating a pneumatic system of a vehicle, the compressed air supply system comprising:
- a compressed air feed;
- a compressed air port leading to the pneumatic system;
- a vent port to the environment;
- a main pneumatic line between the compressed air feed and the compressed air port, the main pneumatic line including an air dryer and a pilot-operated non-return valve;
- a vent line between the compressed air port and the vent port;
- and
- a double relay piston that is pressurizable such that the pilot-operated non-return valve is releasable and a vent valve is actuatable substantially simultaneously.
A compressed air supply system for operating a pneumatic system of a vehicle, the compressed air supply system comprising:
- a compressed air feed;
- a compressed air port leading to the pneumatic system;
- a vent port to the environment;
- a main pneumatic line between the compressed air feed and the compressed air port, the main pneumatic line including an air dryer and a pilot-operated non-return valve;
- and
- a vent line between the compressed air port and the vent port,
- wherein the pilot-operated non-return valve includes:
- a shutoff chamber connected pneumatically to the main pneumatic line,
- a through flow chamber connected pneumatically to the main pneumatic line,
- a control chamber connected pneumatically to a control line via a pneumatic pilot operation line and isolated from the through flow chamber,
- a venting chamber connected pneumatically to the vent line,
- a shutoff valve seat between the shutoff chamber and the through flow chamber,
- a shutoff valve element configured to shut off the shutoff valve seat in shutoff mode and to open the shutoff valve seat in release mode,
- a control piston actuatable by the control chamber and configured to act on the shutoff valve element,
- a vent valve seat between the venting chamber and the vent line, and
- a vent valve element configured to shut off the shutoff valve seat in the shutoff mode and to open the shutoff valve seat in the release mode.
A compressed air supply system for operating a pneumatic system of a vehicle, the compressed air supply system comprising:
- a compressed air feed;
- a vent port to the environment;
- a compressed air port leading to the pneumatic system;
- a vent line between the compressed air port and the vent port;
- and
- a main pneumatic line between the compressed air feed and the compressed air port, the main pneumatic line including:
- an air dryer, and
- a pilot-operated non-return valve including a control chamber, the control chamber being divided into a control space and a venting space by a control piston and/or a seal on the control piston;
- and
- a control valve;
- and
- a pneumatic control line connecting the control valve to the compressed air port,
- wherein the pilot-operated non-return valve is configured to open automatically in a filling direction from the compressed air feed to the compressed air port,
- wherein the control space is connected to a pilot operation branch line and the venting space is connected to a second pilot operation branch line, and
- wherein the control valve is configured to, in a controlled position, connect the pneumatic control line to the control chamber of the pilot-operated non-return valve so as to release the pilot-operated non-return valve and thereby allow flow in a venting direction from the compressed air port to the compressed air feed.
Dependencies are inferred from the claim text.