US6279841B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection valve
Assignee: Robert Bosch GmbH
•
Filing: 1999-03-31
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Granted: 2001-08-28
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Expires: 2019-03-31
Abstract
Abstract In a fuel injector a valve-closure member movable axially along a valve longitudinal axis and a valve-seat body are provided for opening and closing the valve. Allocated to the valve-seat body is a valve-seat face which cooperates with the valve-closure member. In this context, the valve-closure member is joined to the valve-seat body via a spring element designed in the form of a diaphragm spring. The spring element is arranged in such a manner that it pulls the valve-closure member toward the valve-seat face as a return spring in response to closing of the valve. The fuel injector is particularly suitable for use in fuel-injection systems of mixture-compressing internal combustion engines with externally supplied ignition.
Inventors
- 👤 Michael McCormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:05
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/20; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M2200/00; F02M2200/50; Y; Y10; Y10S; Y10S239/00; Y10S239/90; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
A fuel injection valve for supplying an internal combustion engine with fuel, the valve having a longitudinal valve axis, the valve comprising: a valve-closure member axially movable along the longitudinal valve axis for opening and closing the valve; a valve-seat body; a valve-seat face cooperating with the valve-seat body; and a spring element joining the valve-closure member to the valve-seat body; wherein the spring element is sleeve-shaped and has a spring configuration in a region.
Claim 2
Dependent Claim
75 words
A fuel injection valve for supplying an internal combustion engine with fuel, the valve having a longitudinal valve axis, the valve comprising: a valve-closure member axially movable along the longitudinal valve axis for opening and closing the valve; a valve-seat body; a valve-seat face cooperating with the valve-seat body; and a spring element joining the valve-closure member to the valve-seat body; wherein the spring element is sleeve-shaped and has a spring configuration in a region.
Claim 3
Dependent Claim
32 words
The fuel injection valve according to claim 1 , wherein the spring element pulls the valve-closure member toward the valve-seat face as a return spring in response to closing of the valve.
Claim 4
Dependent Claim
17 words
The fuel injection valve according to claim 1 , wherein the spring element includes a diaphragm spring.
Claim 5
Dependent Claim
58 words
The fuel injection valve according to claim 1 , further comprising: a first fastening region joining up contiguously to a region above the spring configuration, the first fastening region partially enclosing the valve-closure member; and a second fastening region joining up contiguously to a region below the spring configuration, the second fastening region partially surrounding the valve-seat body.
Claim 6
Dependent Claim
22 words
The fuel injection valve according to claim 1 , wherein at least the middle region extends in a downstream direction, widening frustoconically.
Claim 7
Dependent Claim
25 words
The fuel injection valve according to claim 1 , further comprising welds fastening the spring element to the valve-closure member and to the valve-seat body.
Claim 8
Dependent Claim
15 words
The fuel injection valve according to claim 1 , wherein the valve-closure member is spherical-shaped.
Claim 9
Dependent Claim
22 words
The fuel injection valve according to claim 1 , wherein the spring element is associated with a filter element for the fuel.
Claim 10
Dependent Claim
25 words
The fuel injection valve according to claim 1 , wherein the spring element has a plurality of holes having a maximum diameter of 60 μm.
Claim 11
Dependent Claim
19 words
The fuel valve according to claim 1 , wherein the region is a middle region of the spring element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-08-27 | 2005-02-26 | 2005-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-08-27 | 2009-02-26 | 2009-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-08-27 | 2013-02-26 | 2013-08-28 | $7700.00 | Window Closed / Lapsed |