AU635785B2 - Electromagnetically operated fuel-injection valve - Google Patents
Electromagnetically operated fuel-injection valve Download PDFInfo
- Publication number
- AU635785B2 AU635785B2 AU65151/90A AU6515190A AU635785B2 AU 635785 B2 AU635785 B2 AU 635785B2 AU 65151/90 A AU65151/90 A AU 65151/90A AU 6515190 A AU6515190 A AU 6515190A AU 635785 B2 AU635785 B2 AU 635785B2
- Authority
- AU
- Australia
- Prior art keywords
- valve
- valve seat
- guide cylinder
- fuel injection
- injection valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/188—Spherical or partly spherical shaped valve member ends
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
Description
-1- Electromagnetically Operated Fuel Injection Valve State of Technology The invention relates to a fuel injection valve.
A fuel injection valve is already known from DE-PS 31 02 642. In this design, a guide ring with the guide cylinder and the valve seat on the one hand, and on the other hand a part described as a jet with an orifice for the fuel to be injected, form separate parts. The guide ring is held in the jet with a press fit.
This requires high dimensional accuracy of the individual parts and considerable effort in fitting the fuel injection valve. In fitting the fuel injection valve, minor excesses of the dimensional tolerances of these individual parts can cause a deformation of the valve seat and poor concentricity of the guide cylinder to the valve seat and to the orifice, leading to an increased irregular fuel radiation pattern.
Summary of the Invention.
According to the present invention there is provided an electromagnetically actuated fuel injection valve having a valve housing, a valve seat s body with a guide cylinder into which a ball type valve dosing body around which fuel flows through grooves protrudes and is guided, said ball type valve closing body is supported on a valve dosure body and by lifting off or seating on of said ball type valve dosing body from a valve seat provided in the valve seat body 9 allows access of the fuel flow to at least one outlet orifice or interrupts said flow, 9 said valve seat body being formed as a one-piece element to contain, in addition to the guide cylinder and the valve seat, said at least one outlet orifice and in that a complete peripheral groove is provided between the guide cylinder and the valve seat.
2 Advantages of the Invention The fuel injection valve which is the subject of this invention Lh *I h.ctii f tues£ l i has the advantage that the fitting effort is reduced and that guide cylinders, valve seat, and injection orifice are accurately aligned with the axis of the valve seat body. This high accuracy is possible within close tolerances. A consistently precise response of the fuel injection valve with constantly accurate injection timing, and precise metering of the fuel is achieved with improved fuel radiation pattern. Further advantageous refinements of the invention result from the subordinate claims.
For a low-cost and dimensionally accurate manufacture it is particularly advantageous to produce the guide cylinder and/or valve seat and/or spiral flute by stamping.
Drawing An embodiment example of the invention is explained in more detail by means of the associated drawing. Figure 1 shows the sectional view of the valve seat area of a fuel injection valve, figure 2 shows the valve seat body of the fuel injection valve as a detail.
Description of the Embodiment Example The fuel injection valve 1 for a fuel injection unit in mixture compressing, positively ignited internal combustion engines has a valve housing 3 with a port 4, in which a valve body 5 is fixed by means of a welded connection 6. The valve body 5 is provided with a central, bore type guide cylinder 7. Downstream of the guide cylinder 7 the valve seat body 5 additionally has a valve seat 8 and, following this, at least one outlet orifice 9 for the fuel injection into the induction manifold of an internal combustion engine.
3 Projecting through the port 4 is a tube shaped valve closing element 10 with radial orifices 11. On the side facing the valve seat 8, the valve closing element 10 carries a valve closing body 12, for example, in the form of a hardened ball. On the side turned away from the valve seat 8, the valve closing element carries an armature of soft magnetic material. The valve closing body 12 projects, with little play, into the guide cylinder 7, and in the closed condition of the fuel injection valve 1, it rests against the valve seat 8. The wall of the guide cylinder 7 has spiral flutes 16 which run obliquely to the axis of the valve closing element 10. A groove 22 runs in ring form between the guide cylinder 7 and the valve seat 8 and thereby interrupts the transition of the spiral flutes 16 to the valve seat 8.
The valve closing element 10 is subjected to pressure in the closing direction from a pressure spring 17. A magnetic coil 18 is arranged adjacent to the armature 15 in such a way that as soon as it is excited, it lifts the armature in a direction opposed to the direction of closing.
The valve seat body 5 shown in figure 2 clearly shows the spiral flutes 16 which are inclined in relation to the axis of the valve seat body 5. The valve seat 8 and at least the one outlet orifice 9 are also recognizable. .In this embodiment of the valve seat body particular machining accuracy is required for the guide cylinder 7 with which the valve seat 8 must be concentric in order for the valve closing element 10 to lift rapidly from the valve seat 8 during opening, and to rapidly close during the closing action.
The friction path between the valve closing element 10 and the valve seat 8 is thus kept as short as possible. A surface area of the valve seat body 5 may be allowed to be slightly eccentric in relation to the guide cylinder 7, since, due to the length of the valve closing element 10 and the ball shape of the valve closing body 12, this does not have an adverse effect.
4 In order to open the fuel injection valve 1, an electrical circuit of the magnetic coil 18 is closed. The magnetic forces which then take effect pull in the armature 15. Together with this armature, the valve closing body 12 of the valve closing element 10 is moved away from valve seat 8, against the pressurizing compressing spring 17, so that the fuel can pass through the valve closing element and its radial orifices 11 via the spiral flutes 16 to the valve seat 8 and downstream to at least one outlet orifice 9, and be ejected. The all-round flute 22 between the guide cylinder 7 and the valve seat 8 facilitates a more even fuel distribution, thereby further improving the fuel processing.
Guide cylinders 7 and/or valve seat 8 and/or spiral flutes 16 in the guide cylinder 7 in valve seat body 5 can be particularly economically and accurately manufactured in their final form by stamping, with the stamping carried out by appropriately shaped dies.
Claims (4)
1. Electro-magnetically actuated fuel injection valve having a valve housing, a valve seat body with a guide cylinder into which a ball type valve cosing body around which fuel flows through grooves protrudes and is guided, said ball type valve cosing body is supported on a valve closure body and by lifting off or seating on of said ball type valve closing body from a valve seat provided in the valve seat body allows access of the fuel flow to at least one outlet orifice or interrupts said flow, said valve seat body being formed as a one-piece element to contain, in addition to the guide cylinder and the valve seat, said at least one outlet orifice and in that a complete peripheral groove is provided between the guide cylinder and the valve seat.
2. Fuel injection valve according to Claim 1, wherein spiral grooves are provided in the wall of the guide cylinder.
3. Fuel injection valve according to Claim 2, wherein the guide cylinder and/or the valve seat and/or the grooves are produced in the valve seat body by stamping.
4. Fuel injection valve according to Claim 1, wherein the valve housing supports the valve seat body by means of a welded connection. Electro-magnetically actuated fuel injection valve substantially as hereinbefore described with reference to the accompanying drawings. 9 DATED this 3rd day of February 1993. ROBERT BOSCH GmbH By their Patent Attorneys: CALLINAN LAWRIE
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3939093A DE3939093A1 (en) | 1989-11-25 | 1989-11-25 | ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE |
| DE3939093 | 1989-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU6515190A AU6515190A (en) | 1991-06-26 |
| AU635785B2 true AU635785B2 (en) | 1993-04-01 |
Family
ID=6394224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU65151/90A Ceased AU635785B2 (en) | 1989-11-25 | 1990-10-12 | Electromagnetically operated fuel-injection valve |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0455758B1 (en) |
| JP (1) | JP3167321B2 (en) |
| KR (1) | KR0172131B1 (en) |
| AU (1) | AU635785B2 (en) |
| BR (1) | BR9007081A (en) |
| CZ (1) | CZ279368B6 (en) |
| DE (2) | DE3939093A1 (en) |
| ES (1) | ES2050457T3 (en) |
| HU (1) | HU209966B (en) |
| WO (1) | WO1991008392A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4141930B4 (en) * | 1991-12-19 | 2007-02-08 | Robert Bosch Gmbh | Electromagnetically actuated injection valve |
| DE4231448C1 (en) * | 1992-09-19 | 1993-10-21 | Bosch Gmbh Robert | Electromagnetic fuel injection valve for ic engine - with conical taper and radial edge downstream of valve seating surface for providing fine fuel vapour mist |
| DE4239110A1 (en) * | 1992-11-20 | 1994-05-26 | Bosch Gmbh Robert | Fuel injector |
| DE19724091A1 (en) * | 1997-06-07 | 1998-12-10 | Bosch Gmbh Robert | Valve |
| DE19829422A1 (en) * | 1998-07-01 | 2000-01-05 | Bosch Gmbh Robert | Fuel injector |
| US6669166B2 (en) * | 2000-07-28 | 2003-12-30 | Nippon Soken, Inc. | Electromagnetic valve |
| DE10049033B4 (en) * | 2000-10-04 | 2005-08-04 | Robert Bosch Gmbh | Fuel injector |
| DE10050751B4 (en) | 2000-10-13 | 2005-08-11 | Robert Bosch Gmbh | Fuel injector |
| DE10050752B4 (en) * | 2000-10-13 | 2005-06-02 | Robert Bosch Gmbh | Fuel injection valve with a swirl-generating element |
| DE10360706A1 (en) | 2003-12-19 | 2005-07-14 | Aweco Appliance Systems Gmbh & Co. Kg | Valve and method for manufacturing a valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU532777B2 (en) * | 1979-01-29 | 1983-10-13 | Bendix Corp., The | Electromagnetic fuel injector |
| US4483485A (en) * | 1981-12-11 | 1984-11-20 | Aisan Kogyo kabuskiki Kaisha | Electromagnetic fuel injector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4660770A (en) * | 1985-09-25 | 1987-04-28 | United Technologies Diesel Systems, Inc. | Electromagnetic fuel injector |
| KR930004967B1 (en) * | 1988-07-13 | 1993-06-11 | 가부시기가이샤 히다찌세이사꾸쇼 | Electronic fuel injector |
| DE3831196A1 (en) * | 1988-09-14 | 1990-03-22 | Bosch Gmbh Robert | ELECTROMAGNETICALLY ACTUABLE VALVE |
| DE3841142C2 (en) * | 1988-12-07 | 1994-09-29 | Bosch Gmbh Robert | Injector |
-
1989
- 1989-11-25 DE DE3939093A patent/DE3939093A1/en not_active Withdrawn
-
1990
- 1990-10-12 DE DE90914674T patent/DE59004626D1/en not_active Expired - Fee Related
- 1990-10-12 ES ES90914674T patent/ES2050457T3/en not_active Expired - Lifetime
- 1990-10-12 BR BR909007081A patent/BR9007081A/en not_active IP Right Cessation
- 1990-10-12 WO PCT/DE1990/000775 patent/WO1991008392A1/en active IP Right Grant
- 1990-10-12 KR KR1019910700769A patent/KR0172131B1/en not_active IP Right Cessation
- 1990-10-12 EP EP90914674A patent/EP0455758B1/en not_active Expired - Lifetime
- 1990-10-12 AU AU65151/90A patent/AU635785B2/en not_active Ceased
- 1990-10-12 JP JP51354290A patent/JP3167321B2/en not_active Expired - Fee Related
- 1990-11-23 HU HU907635A patent/HU209966B/en not_active IP Right Cessation
- 1990-11-23 CZ CS905835A patent/CZ279368B6/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU532777B2 (en) * | 1979-01-29 | 1983-10-13 | Bendix Corp., The | Electromagnetic fuel injector |
| US4483485A (en) * | 1981-12-11 | 1984-11-20 | Aisan Kogyo kabuskiki Kaisha | Electromagnetic fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ279368B6 (en) | 1995-04-12 |
| KR920701659A (en) | 1992-08-12 |
| KR0172131B1 (en) | 1999-03-20 |
| ES2050457T3 (en) | 1994-05-16 |
| AU6515190A (en) | 1991-06-26 |
| EP0455758B1 (en) | 1994-02-16 |
| HU907635D0 (en) | 1991-06-28 |
| DE3939093A1 (en) | 1991-05-29 |
| BR9007081A (en) | 1991-11-26 |
| JPH04503097A (en) | 1992-06-04 |
| EP0455758A1 (en) | 1991-11-13 |
| WO1991008392A1 (en) | 1991-06-13 |
| CZ583590A3 (en) | 1993-06-16 |
| DE59004626D1 (en) | 1994-03-24 |
| JP3167321B2 (en) | 2001-05-21 |
| HU209966B (en) | 1995-01-30 |
| HUT59739A (en) | 1992-06-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |