Patent US4890794A successfully refreshed from Google Patents.
US4890794A
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Perforated body for a fuel injection valve
Assignee: Robert Bosch GmbH
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Filing: 1988-09-12
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Granted: 1990-01-02
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Expires: 2008-09-12
Abstract
Abstract In known fuel injection valves, perforated bodies are secured downstream of the valve sealing seat and are provided with injection openings the size of which meters the quantity of fuel injected. The novel perforated body is intended to enable simple adjustment of the size of these injection openings. The perforated body has a plurality of injection openings, which by their geometry meter the quantity of fuel flowing through them and aim the injected fuel stream. The provision of steps in the form of grooves, blind bores or wedge-shaped notches, in flat sides of the perforated body defines the length of individual injection openings. The perforated body is suitable for use in fuel injection valve of fuel injection systems of internal combustion engines.
Inventors
- 👤 Ichiei Imafuku
- 👤 Waldemar Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:01
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/18; F02M61/1853; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0675; F02M51/0678; F02M51/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
136 words
A perforated body for use downstream of a valve seat of a fuel injection valve for fuel injection systems of internal combustion engines, having a first face (59) located in a first plane, a second face (62) located in a second plane, and at least one step located in a third plane, between which step and one of said first and second faces, at least one injection opening extends penetrating the perforated body, at least one further injection opening (54a) extends between the two faces (59, 62) from said first face (59) to said second face (62), and a length of the at least one further injection opening (54a) differs from a length of the at least one injection opening (54b) extending between the step (80) and one of said first and second faces (59, 62).
Claim 2
Dependent Claim
136 words
A perforated body for use downstream of a valve seat of a fuel injection valve for fuel injection systems of internal combustion engines, having a first face (59) located in a first plane, a second face (62) located in a second plane, and at least one step located in a third plane, between which step and one of said first and second faces, at least one injection opening extends penetrating the perforated body, at least one further injection opening (54a) extends between the two faces (59, 62) from said first face (59) to said second face (62), and a length of the at least one further injection opening (54a) differs from a length of the at least one injection opening (54b) extending between the step (80) and one of said first and second faces (59, 62).
Claim 3
Dependent Claim
34 words
A perforated body as defined by claim 1, in which the step (80) comprises the bottom of an indentation in the perforated body (55) between the first face (59) and the second face (62).
Claim 4
Dependent Claim
22 words
A perforated body as defined by claim 2, in which the step (80) comprises the bottom of a blind bore (98, 99).
Claim 5
Dependent Claim
20 words
A perforated body as defined by claim 2, in which the step (80) comprises the bottom of a groove (82).
Claim 6
Dependent Claim
31 words
A perforated body as defined by claim 2, in which the third plane (93) is disposed at an angle to at least one of said first and said second plane (92).
Claim 7
Dependent Claim
38 words
A perforated body as defined by claim 5, in which the step (80) located in the third plane (93) comprises the bottom of a wedge-shaped notch (95) disposed between the first plane (91) and the second plane (92).
Claim 8
Dependent Claim
17 words
A perforated body as defined by claim 1, in which the step (80) comprises a protrusion (100).
Claim 9
Dependent Claim
37 words
A perforated body as defined by claim 1, in which said injection openings (54a, 54b) have center axes (83a, b) which are inclined to various extents with respect to a longitudinal axis of the fuel injection valve.
Claim 10
Dependent Claim
23 words
A perforated body as defined by claim 1, in which the perforated body (55) comprises a separate part adhered to said second face.
Claim 11
Dependent Claim
20 words
A perforated body as defined by claim 9, in which the perforated body (55) takes the form of a lamina.
Claim 12
Dependent Claim
36 words
A perforated body as defined by claim 1, in which the perforated body (55) comprises a component part of a nozzle body (9) of the fuel injection valve, which nozzle body receives the valve seat (48).
Claim 13
Dependent Claim
29 words
A perforated body as defined by claim 1, in which said perforated body (55) is a separate part positioned between said nozzle body (9) and said preparation sleeve (58).
Claim 14
Dependent Claim
29 words
A perforated body as defined by claim 3, in which said perforated body (55) is a separate part positioned between said nozzle body (9) and said preparation sleeve (58).
Claim 15
Dependent Claim
21 words
A perforated body as defined by claim 12, in which said perforated body (55) is in the form of a lamina.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |