Compressed air supply installation and pneumatic system

Patent metadata

Field	Value
Publication number	US-10093144-B2
Application number	US-201715594664-A
Country	US
Kind code	B2
Filing date	May 15, 2017
Priority date	Dec 16, 2010
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A compressed air supply installation for operating an air suspension installation of a vehicle includes an air supply unit configured to supply air, an air compression unit configured to compress air, a bleeding line, and a compressed air supply line. The bleeding line includes a bleeding valve arrangement in the form of a controllable solenoid valve arrangement comprising a magnetic part and a pneumatic part actuatable directly via the magnetic part, and a bleeding port for bleeding air. The compressed air supply line includes an air dryer, and a compressed air port for supplying the pneumatic installation with compressed air. The pneumatic part is open in an unactivated state of the magnetic part of the solenoid valve arrangement. The pneumatic part is open in a branch line of the compressed air supply line between a pressure-side valve port and a control-side valve port of the branch line.

First claim

What is claimed is:

1. A compressed air supply installation for operating an air suspension installation of a vehicle, the compressed air supply installation comprising:
an air supply configured to supply air;
an air compressor;
a bleeding line, comprising:
a bleeding valve arrangement in the form of a controllable solenoid valve arrangement comprising a magnetic part and a pneumatic part actuatable directly via the magnetic part, and
a bleeding port for bleeding air; and

a compressed air supply line, comprising:
an air dryer, and
a compressed air port for supplying the pneumatic installation with compressed air,

wherein, in an unactivated state of the magnetic part of the solenoid valve arrangement, the pneumatic part of the solenoid valve arrangement is open in the bleeding line between a pressure-side valve port of the bleeding valve arrangement and a bleeding-side valve port of the bleeding valve arrangement.

2. The compressed air supply installation according to claim 1 , further comprising at least one of a first throttle and a second throttle,
wherein the first throttle is arranged directly in the compressed air supply line, and
wherein the second throttle is arranged in the bleeding line.

3. The compressed air supply installation according to claim 2 , wherein the second throttle is disposed in the bleeding line between the pressure-side valve port of the bleeding valve arrangement and a point on the compressed air supply line between the air compressor and the air dryer from which the bleeding line branches off.

4. The compressed air supply installation according to claim 2 , wherein a width of the first throttle is less than a width of the second throttle.

5. The compressed air supply installation according to claim 1 , wherein the bleeding valve arrangement does not include and is not connected to a control valve or piloted valve.

6. The compressed air supply installation according to claim 1 , wherein a check valve is disposed in the bleeding line is configured to maintain a residual pressure in the bleeding line.

7. The compressed air supply installation according to claim 6 , wherein the check valve is configured to maintain a residual pressure of from 1 to 3 bar.

8. The compressed air supply installation according to claim 1 , wherein the pneumatic part of the solenoid valve arrangement includes a pressure limiter.

9. The compressed air supply installation according to claim 8 , wherein the pressure limiter is a current-controlled pressure limiter such that the switching point of the pneumatic part can be set variably according to an amperage of a control current in the magnetic part.

10. The compressed air supply installation according to claim 1 , wherein the bleeding-side valve port of the bleeding valve arrangement is pneumatically connected to the bleeding port.

11. The compressed air supply installation according to claim 1 , wherein the bleeding line branches off from the compressed air supply line at a point between the air compressor and the air dryer.

12. The compressed air supply installation according to claim 11 , wherein there are no valves disposed in the bleeding line between the point between the air compressor and the air dryer from which it branches off and the pressure-side valve port of the bleeding valve arrangement.

13. The compressed air supply installation according to claim 1 , wherein in an activated state of the magnetic part of the solenoid valve arrangement, an armature of the magnetic part of the solenoid valve arrangement is drawn against a spring force of a valve spring such that a valve seal of the pneumatic part of the solenoid valve arrangement that is attached on the armature blocks a pneumatic connection between the pressure-side valve port of the bleeding valve arrangement and the bleeding-side valve port of the bleeding valve arrangement.

14. A pneumatic system, comprising:
a compressed air supply installation for operating an air suspension installation of a vehicle, the compressed air supply installation comprising:
an air supply configured to supply air;
an air compressor;
a bleeding line, comprising:
a bleeding valve arrangement in the form of a controllable solenoid valve arrangement comprising a magnetic part and a pneumatic part actuatable directly via the magnetic part, and

a bleeding port for bleeding air;

a compressed air supply line, comprising:
an air dryer, and
a compressed air port for supplying the pneumatic installation with compressed air; and

the air suspension installation of the vehicle,
wherein, in an unactivated state of the magnetic part of the solenoid valve arrangement, the pneumatic part of the solenoid valve arrangement is open in the bleeding line between a pressure-side valve port of the bleeding valve arrangement and a bleeding-side valve port of the bleeding valve arrangement.

15. A method for operating an air suspension installation of a vehicle via a compressed air supply installation, the method comprising:
supplying a compressor with air via an air supply;
supplying the air suspension installation of the vehicle with compressed air via a compressed air supply line between the air compressor and a compressed air port, the compressed air supply line including an air dryer;
draining air from the air suspension installation of the vehicle via a bleeding line between the compressed air supply line and a bleeding port, the bleeding line comprising a bleeding valve arrangement in the form of a controllable solenoid valve arrangement comprising a magnetic part and a pneumatic part actuatable directly via the magnetic part,
wherein, in an unactivated state of the magnetic part of the solenoid valve arrangement, the pneumatic part of the solenoid valve arrangement is open in the bleeding line between a pressure-side valve port of the bleeding valve arrangement and a bleeding-side valve port of the bleeding valve arrangement.

16. The method according to claim 15 , wherein during the supplying the air suspension installation with compressed air via the compressed air supply line or in the event of a compressed air redistribution in the air suspension installation, the magnetic part of the solenoid valve arrangement is energized in such a way that the pneumatic part of the solenoid valve arrangement is closed.

17. The method according to claim 15 , wherein during the draining air via the bleeding line, the magnetic part is in the unactivated state.

Assignees

• Wabco Gmbh

Inventors

• Frank Dieter
• Meissner Frank
• Stabenow Uwe

Classifications

• B60T17/004

  Draining and drying devices · CPC title

• B60G17/0523 Primary

  Regulating distributors or valves for pneumatic springs · CPC title

• B60G2500/2021

  Arrangement of valves · CPC title

• B60G2600/26

  Electromagnets; Solenoids · CPC title

• B60G11/27

  wherein the fluid is a gas · CPC title