EP0026060A1 - Brennstoffeinspritzdüse - Google Patents
Brennstoffeinspritzdüse Download PDFInfo
- Publication number
- EP0026060A1 EP0026060A1 EP80303089A EP80303089A EP0026060A1 EP 0026060 A1 EP0026060 A1 EP 0026060A1 EP 80303089 A EP80303089 A EP 80303089A EP 80303089 A EP80303089 A EP 80303089A EP 0026060 A1 EP0026060 A1 EP 0026060A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- closure member
- cylindrical surface
- injector
- fuel
- spherical
- 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.)
- Withdrawn
Links
Images
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
-
- 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
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0639—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature acting as a valve
-
- 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
Definitions
- This invention relates to a fuel injector for an internal combustion engine.
- the injector body has therein a fuel flow passage terminating at one end in a shaped orifice through which, in use, fuel issues into the inlet manifold of the internal combustion engine.
- the fuel flow to the orifice is controlled by a valve including a valve closure member movable relative to a valve seat. Movement of the closure member in one direction to engage the seat, and thus cut off the flow of fuel through the injector, is generated by a spring, and movement in the opposite direction to open the valve is generated by energisation of an electromagnet.
- the closure member is in the form of a circular disc the peripheral edge of which defines a cylindrical surface. The disc is guided for movement in the direction of the axis of said cylindrical edge surface by a corresponding internal circular cylindrical surface of the injector body.
- closure member having a cylindrical edge surface supported as a sliding fit in a corresponding cylindrical part of the injector body gives rise in particular to / p roblems.
- a fuel injector includes a body having therein a fuel flow path, a valve in said fuel flow path, said valve including a disc-like closure member guided by an internal circular cylindrical surface of the body for movement relative to the body in a direction parallel to the axis of said cylindrical surface, between a closed position wherein the member engages a mating valve seat to prevent fuel flowing through said path, and an open position wherein thenember is spaced from said seat to permit fuel flow along said path, the peripheral surface of said closure member, which co-operates with said internal cylindrical surface, being so shaped that considering the member and said cylindrical surface in axial-section (as opposed to cross-section) the peripheral edge of the member includes a region which is curved, with the straight line defined by the axial-section of said cylindrical surface tangential thereto, the peripheral surface of the closure member thus having a peripheral, substantially, line-contact, at its region of greatest diameter, with said internal cylindrical surface.
- said region of the peripheral surface of said closure member is part-spherical.
- the whole of the peripheral surface of said closure member is part-spherical.
- the centre of curvature of said part spherical surface of the closure member coincides with the centre point of the region of the closure member bounded by said part-spherical surface.
- the accompanying drawing is an axial sectional view of part of an injector in accordance with one example of the pres t invention.
- the injector includes a multi-part body 11 including a main body 12, an annular bearing plate 13, and a nozzle assembly 14.
- a fuel flow path 15 extends through the body 11 from an inlet union (not shown) to an outlet orifice 16 defined by the nozzle assembly 14.
- the bearing plate 13 is interposed between the nozzle assembly 14 and the main body part 12, and the portion of the fuel flow path 15 defined within the main body part 12 communicates with the orifice l6 by way of the central aperture of the annular bearing plate 13.
- a circular, disc-like valve closure member 17 is supported within the central aperture of the bearing plate 13 .
- the outlet end of the portion of the fuel flow path within the main body part 12 is defined by an annular aperture 18 which is aligned with the central aperture of the plate 13.
- the orifice 16 of the nozzle assembly 14 is disposed on the axis of the injector, and surrounding the orifice 16 is a raised valve seat 19 against which the closure member 17 is urged by a compression spring 21.
- the valve closure member 17 is formed with a circular row of through bores 22 which communicate at one end with the annular outlet 18 of the main body part 12.
- the circular row of through bores 22 lies radially outwardly from the valve seat 19, and thus when the central solid part of the closure member 17 engages the valve seat 19 then flow of fuel from the bores 22 to the orifice 16 is prevented.
- fuel can flow from the outlet 18 of the main body part 12, through the bores 22, between the lower face of the closure member 17 and the seat 19, and through the orifice 16 into the inlet tract of the internal combustion engine utilizing the injector.
- valve defined by the closure member 17 and the seat 19 is closed by the action of the spring 21 which urges the closure member 17 firmly against the seat 19.
- the valve is opened by energisation of an electromagnet the fixed inner pole of which is defined by a centrally disposed hollow spigot 12a of the main body part 12,and the movable armature of which is defined by the closure member 17.
- the spring 21 is housed within the hollow spigot 12a.
- the electromagnet winding (which is not shown in the drawing) encircles the spigot l2â,and when the winding is energised the closure member 17 which is formed from ferro-magnetic material, is moved towards the lower end of the spigot 12a against the action of the spring 21 to open the valve.
- the wall 23 of the central aperture in the plate 13 is cylindrical, and is of circular cross-section, the axis of the cylindrical surface 23 being coincident with the axis of the spigot 12a.
- the peripheral, outer surface 24 of the closure member 17, for which the surface 23 constitutes a bearing, is part spherical, having its centre of curvature coincident with the centre point of the closure member.
- the region of the closure member 17 of greatest diameter is on the median plane of the closure member 17 and makes substantially line contact, around the periphery of the closure member 17, with the surface 23.
- the peripheral edge of the closure member is part circular, and the line defined by the axial section of the cylindrical surface 23 is tangential thereto.
- This clearance facilitates insertion of the closure member 17 into the aperture of the bearing plate 13 during assembly of the injector, and also minimizes the "fluid” or “viscous” drag on the closure member 17 resulting from the presence of liquid fuel in the bearing defined between the closure member 17 and the bearing plate 13, by comparison with the drag which would be exhibited by the fuel film in the bearing if the outer peripheral surface of the closure member 17 were cylindrical and a sliding fit in the bearing plate 13.
- the surface 24 of the closure member 17 is part spherical, having its centre of curvature coincident with the centre of the closure member 17, it is to be understood that it is not essential that the surface 24 is part spherical, and it is not essential that even if the surface 24 is part spherical then its centre of curvature is coincident with the actual centre point of the closure member.
- the region of greatest diameter of the closure member would be at one or other of the axial ends of the closure member, and all of the clearance between the surface 24 and the surface 23 would be to one side of the peripheral line of contact between the surface 24 and the surface 23.
- the surface 24 may if desired by part elipsoidal or the like rather than part spherical. Nevertheless, it is preferable for the surface 24 to be part spherical having its centre of curvature coincident with the actual centre of the closure member so that misalignment of the closure member within the plate 13 can be accommodated in use. It will be recognised that in such an arrangement the closure member and plate 13 will act in the manner of a ball and cup joint and the effects of any misalignment will be minimal.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7932662 | 1979-09-20 | ||
GB7932662 | 1979-09-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0026060A1 true EP0026060A1 (de) | 1981-04-01 |
Family
ID=10507959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80303089A Withdrawn EP0026060A1 (de) | 1979-09-20 | 1980-09-04 | Brennstoffeinspritzdüse |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0026060A1 (de) |
JP (1) | JPS5664149A (de) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0102723A1 (de) * | 1982-07-29 | 1984-03-14 | LUCAS INDUSTRIES public limited company | Kraftstoffeinspritzventil nach Scheibenart |
GB2136500A (en) * | 1983-03-16 | 1984-09-19 | Lucas Ind Plc | Electromagnetic fuel injector |
FR2549902A1 (fr) * | 1983-07-28 | 1985-02-01 | Lucas Ind Plc | Injecteur de carburant |
GB2144201A (en) * | 1983-07-28 | 1985-02-27 | Lucas Ind Plc | Fuel injector valve seat |
GB2148388A (en) * | 1983-10-25 | 1985-05-30 | Lucas Ind Plc | Electromagnetic gasoline injector |
US4721254A (en) * | 1984-12-06 | 1988-01-26 | Vdo Adolf Schindling Ag | Electromagnetically actuatable fuel-injection valve |
US4832314A (en) * | 1987-08-17 | 1989-05-23 | Robert Bosch Gmbh | Electromagnetically actuatable fuel injection valve |
DE3810827A1 (de) * | 1988-03-30 | 1989-10-12 | Pierburg Gmbh | Elektromagnetisches einspritzventil fuer brennkraftmaschinen |
DE3811003A1 (de) * | 1988-03-31 | 1989-10-12 | Pierburg Gmbh | Elektromagnetisches einspritzventil fuer brennkraftmaschinen |
EP0582298A1 (de) * | 1992-08-07 | 1994-02-09 | MAGNETI MARELLI S.p.A. | Verbessertes elektromagnetisches Kraftstoffdosier- und Kraftstoffzerstäubungsventil |
EP0583139A1 (de) * | 1992-08-14 | 1994-02-16 | LUCAS INDUSTRIES public limited company | Kraftstoffeinspritzventil |
WO2005040591A1 (en) * | 2003-10-07 | 2005-05-06 | Med S.P.A. | Electrically operated injector for gaseous fuel |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015325A (en) * | 1960-03-04 | 1962-01-02 | Russell F Williams | Fuel injector |
DE1264149B (de) * | 1962-05-19 | 1968-03-21 | Daimler Benz Ag | Vorrichtung zur Entlastung der Einspritzleitung von Brennkraftmaschinen |
US3412718A (en) * | 1967-06-13 | 1968-11-26 | Gillett Tool Co | Precision fuel metering system |
DE1500022B2 (de) * | 1964-04-20 | 1972-11-30 | Ford Motor Co., Dearborn, Mich. (V.St.A.) | Rueckschlagventil, insbesondere druckventil fuer eine brennstoff-einspritzpumpe |
DD97026A5 (de) * | 1970-09-25 | 1973-04-12 | ||
DE2412490A1 (de) * | 1974-03-15 | 1975-09-25 | Kunz Dieter | Einspritz- und vernebelungskopf |
US4033513A (en) * | 1975-11-06 | 1977-07-05 | Allied Chemical Corporation | Electromagnetically operated valve |
FR2349078A1 (fr) * | 1976-04-22 | 1977-11-18 | Proengin | Electrovanne |
-
1980
- 1980-09-04 EP EP80303089A patent/EP0026060A1/de not_active Withdrawn
- 1980-09-20 JP JP13011180A patent/JPS5664149A/ja active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015325A (en) * | 1960-03-04 | 1962-01-02 | Russell F Williams | Fuel injector |
DE1264149B (de) * | 1962-05-19 | 1968-03-21 | Daimler Benz Ag | Vorrichtung zur Entlastung der Einspritzleitung von Brennkraftmaschinen |
DE1500022B2 (de) * | 1964-04-20 | 1972-11-30 | Ford Motor Co., Dearborn, Mich. (V.St.A.) | Rueckschlagventil, insbesondere druckventil fuer eine brennstoff-einspritzpumpe |
US3412718A (en) * | 1967-06-13 | 1968-11-26 | Gillett Tool Co | Precision fuel metering system |
DD97026A5 (de) * | 1970-09-25 | 1973-04-12 | ||
DE2412490A1 (de) * | 1974-03-15 | 1975-09-25 | Kunz Dieter | Einspritz- und vernebelungskopf |
US4033513A (en) * | 1975-11-06 | 1977-07-05 | Allied Chemical Corporation | Electromagnetically operated valve |
FR2349078A1 (fr) * | 1976-04-22 | 1977-11-18 | Proengin | Electrovanne |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0102723A1 (de) * | 1982-07-29 | 1984-03-14 | LUCAS INDUSTRIES public limited company | Kraftstoffeinspritzventil nach Scheibenart |
GB2136500A (en) * | 1983-03-16 | 1984-09-19 | Lucas Ind Plc | Electromagnetic fuel injector |
FR2549902A1 (fr) * | 1983-07-28 | 1985-02-01 | Lucas Ind Plc | Injecteur de carburant |
GB2144201A (en) * | 1983-07-28 | 1985-02-27 | Lucas Ind Plc | Fuel injector valve seat |
GB2148388A (en) * | 1983-10-25 | 1985-05-30 | Lucas Ind Plc | Electromagnetic gasoline injector |
US4721254A (en) * | 1984-12-06 | 1988-01-26 | Vdo Adolf Schindling Ag | Electromagnetically actuatable fuel-injection valve |
US4832314A (en) * | 1987-08-17 | 1989-05-23 | Robert Bosch Gmbh | Electromagnetically actuatable fuel injection valve |
DE3810827A1 (de) * | 1988-03-30 | 1989-10-12 | Pierburg Gmbh | Elektromagnetisches einspritzventil fuer brennkraftmaschinen |
DE3811003A1 (de) * | 1988-03-31 | 1989-10-12 | Pierburg Gmbh | Elektromagnetisches einspritzventil fuer brennkraftmaschinen |
EP0582298A1 (de) * | 1992-08-07 | 1994-02-09 | MAGNETI MARELLI S.p.A. | Verbessertes elektromagnetisches Kraftstoffdosier- und Kraftstoffzerstäubungsventil |
US5375772A (en) * | 1992-08-07 | 1994-12-27 | Weber S.R.L. | Perfected electromagnetic fuel metering and atomizing valve |
EP0583139A1 (de) * | 1992-08-14 | 1994-02-16 | LUCAS INDUSTRIES public limited company | Kraftstoffeinspritzventil |
US5381966A (en) * | 1992-08-14 | 1995-01-17 | Lucas Industries Public Limited Company | Fuel injector |
WO2005040591A1 (en) * | 2003-10-07 | 2005-05-06 | Med S.P.A. | Electrically operated injector for gaseous fuel |
US7464886B2 (en) | 2003-10-07 | 2008-12-16 | Med S.P.A. | Electrically operated injector for gaseous fuel |
CN100453791C (zh) * | 2003-10-07 | 2009-01-21 | Med公开有限公司 | 用于气体燃料的电力操作的喷射器 |
AU2004284168B2 (en) * | 2003-10-07 | 2010-10-28 | Landi Renzo S.P.A. | Electrically operated injector for gaseous fuel |
Also Published As
Publication number | Publication date |
---|---|
JPS5664149A (en) | 1981-06-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB IT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19820308 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LUCAS INDUSTRIES PLC |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HILL, WILLIAM FRANK |