Compressed air supply installation and pneumatic system

Patent metadata

Field	Value
Publication number	US-9694801-B2
Application number	US-201113993839-A
Country	US
Kind code	B2
Filing date	Nov 22, 2011
Priority date	Dec 16, 2010
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A compressed air supply device for operating a pneumatic installation comprises an air supply unit configured to supply air, an air compression unit configured to compress air, a bleeding line comprising a controllable solenoid valve arrangement, the solenoid valve arrangement having a magnetic part and a pneumatic part, and a bleeding port configured to bleed air. The device also comprises a compressed air supply line having an air drier and a compressed air port, the compressed air supply line being configured to supply the pneumatic installation with compressed air, wherein the pneumatic part is open when the magnetic part is not activated.

First claim

What is claimed is:

1. A compressed air supply device for operating a pneumatic installation, comprising:
an air supply unit configured to supply air;
an air compression unit configured to compress air;
a bleeding line comprising a controllable solenoid valve arrangement and a bleeding port configured to bleed air, the solenoid valve arrangement having a magnetic part and a pneumatic part; and
a compressed air supply line comprising an air dryer and a compressed air port, the compressed air supply line being configured to supply the pneumatic installation with compressed air, wherein the pneumatic part is disposed in a line branching from the compressed air supply line, and wherein, when the magnetic part is de-energized, the pneumatic part is open between a pressure-side valve port and a control-side valve port of the line branching from the compressed air supply line,
wherein the solenoid valve arrangement comprises a relay valve configured to maintain a residual pressure up to three bar.

2. The compressed air supply device as claimed in claim 1 , further comprising at least one of (i) a first throttle disposed in one of the compressed air supply line and the line branching from the compressed air supply line and (ii) a second throttle disposed in one of the bleeding line and a line branching from the bleeding line.

3. The compressed air supply device as claimed in claim 1 , wherein the line branching from the compressed air supply line is a first line that, in addition to the bleeding line and a second line, branches from the compressed air supply line, and wherein the solenoid valve arrangement comprises a control valve, the control valve being configured to control the relay valve, the control valve being exposed to a total pressure of a total compressed air volume, and disposed in the first line.

4. The compressed air supply device as claimed in claim 3 , wherein the control valve includes the magnetic part and the pneumatic part, wherein the pneumatic part includes the relay valve, wherein the relay valve is disposed in the bleeding line, and wherein the relay valve comprises a relay pressure limiter.

5. The compressed air supply device as claimed in claim 1 , wherein the line branching from the compressed air supply line is a single line that, in addition to the bleeding line, branches from the compressed air supply line, and wherein the solenoid valve arrangement comprises a control valve, the control valve being configured to control the relay valve, the control valve being exposed to a partial pressure of a total compressed air volume, and disposed in the single line.

6. The compressed air supply device as claimed in claim 5 , wherein the control valve includes the magnetic part and the pneumatic part, wherein the pneumatic part includes the relay valve, wherein the relay valve is disposed in the bleeding line, and wherein the relay valve comprises a relay pressure limiter.

7. The compressed air supply device as claimed in claim 1 , wherein the line branching from the compressed air supply line is one of: (i) a single line that, in addition to the bleeding line, branches from the compressed air supply line and (ii) a first line that, in addition to the bleeding line and a second line, branches from the compressed air supply line.

8. The compressed air supply device as claimed in claim 1 , wherein the pneumatic part comprises a 3/2 valve, wherein the relay valve is located in the bleeding line, and wherein the relay valve is pneumatically activated when the pneumatic part is open.

9. The compressed air supply device as claimed in claim 1 , wherein the relay valve comprises a relay pressure limiter.

10. A pneumatic system comprising the compressed air supply device as claimed in claim 1 .

11. The compressed air supply device as claimed in claim 1 , wherein the pneumatic installation comprises a vehicle air suspension system.

12. A compressed air supply device for operating a pneumatic installation, comprising:
an air supply unit configured to supply air;
an air compression unit configured to compress air;
a bleeding line comprising a controllable solenoid valve arrangement and a bleeding port configured to bleed air, the solenoid valve arrangement having a magnetic part and a pneumatic part;
a compressed air supply line comprising an air dryer and a compressed air port, the compressed air supply line being configured to supply the pneumatic installation with compressed air, wherein the pneumatic part is disposed in a line branching from the compressed air supply line, and wherein, when the magnetic part is de-energized, the pneumatic part is open between a pressure-side valve port and a control-side valve port of the line branching from the compressed air supply line; and
a relay valve, wherein the relay valve is open between a pressure-side valve port and a bleeding-side valve port of a line branching from the bleeding line, when the magnetic part is de-energized.

13. The compressed air supply device as claimed in claim 12 , further comprising at least one of (i) a first throttle disposed in one of the compressed air supply line and the line branching from the compressed air supply line and (ii) a second throttle disposed in one of the bleeding line and a line branching from the bleeding line.

14. The compressed air supply device as claimed in claim 12 , wherein the line branching from the compressed air supply line is a first line that, in addition to the bleeding line and a second line, branches from the compressed air supply line, and wherein the solenoid valve arrangement comprises a control valve, the control valve being configured to control the relay valve, the control valve being exposed to a total pressure of a total compressed air volume, and disposed in the first line.

15. The compressed air supply device as claimed in claim 12 , wherein the line branching from the compressed air supply line is a single line that, in addition to the bleeding line, branches from the compressed air supply line, and wherein the solenoid valve arrangement comprises a control valve, the control valve being configured to control the relay valve, the control valve being exposed to a partial pressure of a total compressed air volume, and disposed in the single line.

16. The compressed air supply device as claimed in claim 12 , wherein the line branching from the compressed air supply line is one of: (i) a single line that, in addition to the bleeding line, branches from the compressed air supply line and (ii) a first line that, in addition to the bleeding line and a second line, branches from the compressed air supply line.

17. The compressed air supply device as claimed in claim 12 , wherein the pneumatic part comprises a 3/2 valve, wherein the relay valve is located in the bleeding line, and wherein the relay valve is pneumatically activated when the pneumatic part is open.

18. The compressed air supply device as claimed in claim 12 , wherein the relay valve comprises a relay pressure limiter.

19. A compressed air supply device for operating a pneumatic installation, comprising:
an air supply unit configured to supply air;
an air compression unit configured to compress air;
a bleeding line comprising a controllable solenoid valve arrangement and a bleeding port configured to bleed air, the solenoid valve arrangement having a magnetic part and a pneumatic part; and
a compressed air supply line comprising an air dryer and a compressed air port, the compressed air supply line being configured to supply the pneumatic installation with compress

Assignees

• Frank Dieter
• Meissner Frank
• Stabenow Uwe
• Wabco Gmbh

Inventors

• Frank Dieter
• Meissner Frank
• Stabenow Uwe

Classifications

• B60G2300/07

  Off-road vehicles · CPC title

• B60G17/052

  Pneumatic spring characteristics (B60G17/048 takes precedence {; valves per se F16K}) · CPC title

• Y10T137/264

  Electrical control · CPC title

• B60G2500/2012

  Open systems · CPC title

• Y10T137/0318

  Processes · CPC title