US4925111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection valve
Assignee: Robert Bosch GmbH
•
Filing: 1989-02-01
•
Granted: 1990-05-15
•
Expires: 2009-02-01
Abstract
Abstract A fuel injection valve for internal combustion engines is proposed which has at least one metering opening provided in the injection end of the fuel injection valve, an intermediate space formed downstream of the metering opening and defined on its side remote from the metering opening by a preparation wall, which is embodied as thin-walled at least in the vicinity of preparation openings that penetrate it and lead outward from the intermediate space, there further being included an exchangable cap which fits over and is snapped onto the injection end of the nozzle, the preparation openings in the cap which fits over and is snapped onto the injection end of the nozzle, the preparation openings in the cap being contructed to direct fuel at a single intake valve or a pair of intake valves.
Inventors
- 👤 Manfred Foertsch
- 👤 Waldemar Hans
- 👤 Volker Warnicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:20
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/04; F02M61/06; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0675; F02M51/0678; F02M51/08; F02M61/16; F02M61/162; F02M61/18; F02M61/1853
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A fuel injection valve for internal combustion engines comprising a nozzle body (5), said nozzle body including a fuel injection end (14), said fuel injection end having an am and a downstream surface, a valve seat face (10) on said upstream surface of said fuel injection end, at least one metering opening (11) provided through said fuel injection end (14) of the fuel injection valve, a cup-shaped cap (17) secured onto said fuel injection end, an intermediate space (20) formed downstream of the metering opening between said fuel injection end downstream surface and said cup-shaped cup an defined on a side remote from said at least one metering opening by a preparation wall (22) which is embodied as thin-walled, at least two preparation openings (23) that penetrate said preparation wall and lead outward from said intermediate space, said cup-shaped cap fits over and snaps onto said fuel injection end, and said preparation wall is embodiment in a bottom (19) of said cup-shaped cap.
Claim 2
Dependent Claim
163 words
A fuel injection valve for internal combustion engines comprising a nozzle body (5), said nozzle body including a fuel injection end (14), said fuel injection end having an am and a downstream surface, a valve seat face (10) on said upstream surface of said fuel injection end, at least one metering opening (11) provided through said fuel injection end (14) of the fuel injection valve, a cup-shaped cap (17) secured onto said fuel injection end, an intermediate space (20) formed downstream of the metering opening between said fuel injection end downstream surface and said cup-shaped cup an defined on a side remote from said at least one metering opening by a preparation wall (22) which is embodied as thin-walled, at least two preparation openings (23) that penetrate said preparation wall and lead outward from said intermediate space, said cup-shaped cap fits over and snaps onto said fuel injection end, and said preparation wall is embodiment in a bottom (19) of said cup-shaped cap.
Claim 3
Dependent Claim
61 words
A fuel injection valve as defined by claim 1, in which said cup-shaped cap (17) rests with its bottom (19) on an end face (15) of said fuel injection end (14), and said intermediate space (20) is defines by an indentation (21) in the bottom (19) of said cup-shaped cap and by said end face (15) of the injection end (14).
Claim 4
Dependent Claim
49 words
A fuel injection valve as defined by claim 2, in which said at least two preparation openings (23) extend in a direction which is inclined toward one another such that a fuel stream emerging from each of said preparation openings strike one another and break apart into fuel droplets.
Claim 5
Dependent Claim
37 words
A fuel injection valve as defined by claim 3, in which said at least two preparation openings (23) extend in a direction which is relative to one another such that at least two fuel streams are produced.
Claim 6
Dependent Claim
20 words
A fuel injection valve as defined by claim 4, in which said cup shaped cap (17) is made of plastic.
Claim 7
Dependent Claim
20 words
A fuel injection valve as defined by claim 3, in which said cup shaped cap (17) is made of plastic.
Claim 8
Dependent Claim
37 words
A fuel injection valve as defined by claim 2, in which said at least two preparation openings (23) extend in a direction which is relative to one another such that at least two fuel streams are produced.
Claim 9
Dependent Claim
20 words
A fuel injection valve as defined by claim 7, in which said cup shaped cap (17) is made of plastic.
Claim 10
Dependent Claim
20 words
A fuel injection valve as defined by claim 2, in which said cup shaped cap (17) is made of plastic.
Claim 11
Dependent Claim
20 words
A fuel injection valve as defined by claim 1, in which said cup shaped cap (17) is made of plastic.
References Cited (Backward Citations)
DE459677C
Cited
US3705692A
Cited
US4007880A
Cited
US4060199A
Cited
US4057190A
Cited
US4235375A
Cited
US4666088A
Cited
US4621772A
Cited
US4646974A
Cited
US4753393A
Cited
US4771948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |