US5524593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electropneumatic control valve
Assignee: Pierburg GmbH
•
Filing: 1995-05-17
•
Granted: 1996-06-11
•
Expires: 2015-05-17
Abstract
Abstract An electropneumatic control valve for regeneration of a fuel absorption element by supply of air to the absorption element includes a valve comprised of a valve seat member (5) and a valve sealing member (4). The valve seat member is displaceable under the action of a pneumatic control section (2B) while the valve sealing member (4) is displaceable under the control of an electromagnetic control section (2A). The operation of the valve members (4, 5), takes place independently of one another by the respective control sections. During strong suction pressures in connector (11), valve seat member (5) is lowered and during the opening stroke of the valve sealing member (4) a minimum opening is provided whereas during low suction pressure at connector (11) the valve seat member (5) is raised and during the opening stroke of the valve sealing member (4) a maximum valve opening is produced. The valve members are slidably and guidably supported in a fixed sleeve (6) provided with calibrated openings (15).
Inventors
- 👤 Albert Denne
- 👤 Werner Buse
- 👤 Gerhard Parthe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:18
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0686; F16K31/0693; F02; F02M; F02M25/00; F02M25/08; F02M25/0836
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
A control valve for regeneration of a fuel absorption element by air flow through the absorption element, said valve comprising: valve means for controlling flow of air in an air passage connectable to an air source and a fuel absorption element, electromagnetic control means connected to said valve means for regulating said air passage, and pneumatic control means connected to said valve means for regulating said air passage independently of said electromagnetic control means, said valve means comprising a displaceable valve seat member having a valve seat in said air passage and a displaceable valve sealing member facing said valve seat member to open and close said air passage, said displaceable valve seat member and said displaceable valve sealing member each being connected to a respective one of said control means for being independently operated thereby, and a guide sleeve slidably and guidably supporting said valve seat member and said valve sealing member.
Claim 2
Dependent Claim
153 words
A control valve for regeneration of a fuel absorption element by air flow through the absorption element, said valve comprising: valve means for controlling flow of air in an air passage connectable to an air source and a fuel absorption element, electromagnetic control means connected to said valve means for regulating said air passage, and pneumatic control means connected to said valve means for regulating said air passage independently of said electromagnetic control means, said valve means comprising a displaceable valve seat member having a valve seat in said air passage and a displaceable valve sealing member facing said valve seat member to open and close said air passage, said displaceable valve seat member and said displaceable valve sealing member each being connected to a respective one of said control means for being independently operated thereby, and a guide sleeve slidably and guidably supporting said valve seat member and said valve sealing member.
Claim 3
Dependent Claim
85 words
An electropneumatic control valve as claimed in claim 1, wherein said pneumatic control means comprises a membrane separating first and second chambers, said first chamber being connected to said passage and connectable to a fuel absorption element, said second chamber being connected to said air supply which comprises a suction source to produce air flow from said first chamber to said second chamber via said sleeve under control of said valve means, said sleeve having a calibrated opening for passage of air through the sleeve.
Claim 4
Dependent Claim
54 words
An electropneumatic control valve as claimed in claim 2, comprising a dividing wall in said second chamber between said membrane and a connector for connection to the suction source, said dividing wall defining first and second sub-divided chambers on opposite sides thereof and a calibrated aperture means joining said first and second subdivided chambers.
Claim 5
Dependent Claim
29 words
An electropneumatic control valve as claimed in claim 3, wherein the first sub-divided chamber is bounded by said membrane and said second sub-divided chamber is connected to said connector.
Claim 6
Dependent Claim
22 words
An electropneumatic control valve as claimed in claim 4, wherein said calibration opening in said sleeve opens into said second sub-divided chamber.
Claim 7
Dependent Claim
20 words
An electropneumatic control valve as claimed in claim 5, wherein said calibrated aperture means is provided in said dividing wall.
Claim 8
Dependent Claim
34 words
An electropneumatic control valve as claimed in claim 5, comprising a housing containing said sleeve, said chambers, and said dividing wall, said calibrated aperture means being provided between said dividing wall and said housing.
Claim 9
Dependent Claim
32 words
An electropneumatic control valve as claimed in claim 1, wherein said sleeve has an end facing said valve seat member to limit said valve seat member in one direction of displacement thereof.
Claim 10
Dependent Claim
25 words
An electropneumatic control valve as claimed in claim 8, comprising fixed means for limiting said valve seat member in the opposite direction of displacement thereof.
Claim 11
Dependent Claim
17 words
An electropneumatic control valve as claimed 1, wherein said air source comprises a source of suction air.
References Cited (Backward Citations)
US4366835A
Cited
DE3519292A1
Cited
US4703737A
Cited
US4944276A
Cited
EP0325698A2
Cited
DE3844057A1
Cited
US4986246A
Cited
DE3907408A1
Cited
US5178116A
Cited
US5069188A
Cited
US5083546A
Cited
US5383437A
Cited
US5277167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-11 | 1999-12-11 | 2000-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-11 | 2003-12-11 | 2004-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-11 | 2007-12-11 | 2008-06-11 | $7700.00 | Window Closed / Lapsed |