Compressed air supply installation, pneumatic system and method

Patent metadata

Field	Value
Publication number	US-9926994-B2
Application number	US-201113992322-A
Country	US
Kind code	B2
Filing date	Nov 22, 2011
Priority date	Dec 16, 2010
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A compressed air supply installation for operating a pneumatic installation, especially an air suspension installation of a vehicle, includes: an air supply unit and an air compression unit for supplying a compressed air supply unit with compressed air, a pneumatic connection, especially a bleeding line, comprising a bleeding valve system in the form of a controllable solenoid valve system and a bleeding port for bleeding air, and a pneumatic connection, especially a compressed air supply line, comprising an air drier and a compressed air port for supplying compressed air. The solenoid valve system comprises a primary valve and a secondary valve, which are actuatable by a controller of the solenoid valve system that is common to both valves and acts upon both valves.

First claim

What is claimed is:

1. A compressed air supply system for operating a pneumatic device, the system comprising:
an air feed;
an air compressor configured to supply a compressed air feed with compressed air;
a vent line having arranged therein:
a solenoid vent valve arrangement having a primary solenoid valve and a secondary solenoid valve, wherein the primary solenoid valve and the secondary solenoid valve are independently actuatable by a common controller of the solenoid valve arrangement, and
a vent port configured to discharge air, and

a compressed air supply line having arranged therein:
an air drier, and
a compressed air port configured to supply the pneumatic device with compressed air,

wherein the solenoid vent valve arrangement includes only a single inlet side port and a single outlet side port, and
wherein each of the primary solenoid valve and the secondary solenoid valve allow for flow from the inlet side port to the outlet side port.

2. The compressed air supply system as claimed in claim 1 , wherein the solenoid vent valve arrangement includes a pneumatic vent-side port and a pneumatic compressed air connection-side port arranged in the vent line.

3. The compressed air supply system as claimed in claim 1 , wherein the primary valve and the secondary valve are arranged in a parallel connection, the primary valve being arranged in a first branch line of the parallel connection and the secondary valve being arranged in a second branch line of the parallel connection, the first branch line and the second branch line both being connected to the single inlet side port and the single outlet side port of the of the solenoid vent valve arrangement.

4. The compressed air supply system as claimed in claim 1 , wherein the primary valve and the secondary valve are arranged in a series connection, the primary valve and the secondary valve being arranged in a common single line section between a vent-side port and compressed air connection-side port of the vent line.

5. The compressed air supply system as claimed in claim 1 , wherein at least one of the primary valve and the secondary valve includes a pressure limiter.

6. The compressed air supply system as claimed in claim 1 , wherein the vent line has a residual pressure maintaining valve.

7. The compressed air supply system as claimed in claim 1 , wherein the solenoid vent valve arrangement includes no other valves and is configured to directly connect to a compressed air volume via the primary valve and the secondary valve.

8. The compressed air supply system as claimed in claim 1 , further comprising a first restrictor arranged between the compressed air port and the air drier, and at least one of a second restrictor in the vent line located upstream of the primary valve, and a third restrictor located upstream of the secondary valve.

9. The compressed air supply system as claimed in claim 8 , wherein a sum of nominal diameters of the second restrictor and the third restrictor is larger than a nominal diameter of the first restrictor.

10. The compressed air supply system as claimed in claim 9 , wherein the sum of the nominal diameters of the second restrictor and the third restrictor is greater than twice the size of the nominal diameter of the first restrictor.

11. The compressed air supply system as claimed in claim 1 , wherein the common controller comprises a magnetic section of the solenoid vent valve arrangement.

12. The compressed air supply system as claimed in claim 11 , wherein the solenoid vent valve arrangement is a double-armature solenoid valve having a primary armature carrying a first sealing element of the primary valve and a secondary armature carrying a second sealing element of the secondary valve, and wherein the primary and secondary armatures are arranged in or enclosed by a common coil former.

13. The compressed air supply system as claimed in claim 11 , wherein the magnetic section includes at 1 east one of a common coil former and one of a common control line and a common control unit.

14. The compressed air supply system as claimed in claim 1 , wherein the air drier includes a desiccant container having a wall defining a desiccant-free recess, and wherein the solenoid vent valve arrangement is arranged at least partially in the recess.

15. The compressed air supply system as claimed in claim 1 , wherein the primary solenoid valve includes a primary armature carrying a first sealing element, wherein the secondary solenoid valve includes a secondary armature carrying a second sealing element, and wherein the primary solenoid valve and the secondary solenoid valve are independently actuatable by the common controller as a result of the primary armature and the secondary armature being independently actuatable by the common controller.

16. A pneumatic system comprising a pneumatic device and a compressed air supply system configured to operate the pneumatic device, the compressed air supply system comprising:
an air feed;
an air compressor configured to supply a compressed air feed with compressed air;
a vent line having arranged therein:
a solenoid vent valve arrangement having a primary solenoid valve and a secondary solenoid valve, wherein the primary solenoid valve and the secondary solenoid valve are independently actuatable by a common controller of the solenoid valve arrangement, and
a vent port configured to discharge air, and

a compressed air supply line having arranged therein:
an air drier, and
a compressed air port configured to supply the pneumatic device with compressed air,

wherein the solenoid vent valve arrangement includes only a single inlet side port and a single outlet side port, and
wherein each of the primary solenoid valve and the secondary solenoid valve allow for flow from the inlet side port to the outlet side port.

17. The pneumatic system as claimed in claim 16 , wherein the pneumatic device is a pneumatic spring unit of a vehicle.

18. The compressed air supply system as claimed in claim 16 , wherein the primary solenoid valve includes a primary armature carrying a first sealing element, wherein the secondary solenoid valve includes a secondary armature carrying a second sealing element, and wherein the primary solenoid valve and the secondary solenoid valve are independently actuatable by the common controller as a result of the primary armature and the secondary armature being independently actuatable by the common controller.

19. A method for operating a pneumatic device, the method comprising:
performing, using a compressed air supply system comprising:
an air feed and an air compressor configured to supply a compressed air feed with compressed air;
a vent line having arranged therein a solenoid vent valve arrangement having a primary solenoid valve and a secondary solenoid valve, wherein the primary solenoid valve and the secondary solenoid valve are independently actuatable by a common controller of the solenoid valve arrangement;
a vent port configured to discharge air; and
a compressed air supply line with an air drier and a compressed air port configured to supply the pneumatic device with compressed air,

the steps of:
supplying the compressed air feed with compressed air using the air feed and the air compressor,
discharging air via the vent line using the solenoid vent valve arrangement and via the vent port, and
supplying the pneumatic device with compressed air via the compressed air supply line,

wherein the solenoid vent valve arrangement includes only a single inlet side port an

Assignees

• Frank Dieter
• Meissner Frank
• Wabco Gmbh

Inventors

• Frank Dieter
• Meissner Frank

Classifications

• B60G2500/2012

  Open systems · CPC title

• B60G2500/30

  Height or ground clearance · CPC title

• B60G2500/2021

  Arrangement of valves · CPC title

• B60G2500/2044

  Air exhausting valves · CPC title

• B60G2300/07

  Off-road vehicles · CPC title