EP1541861A2 - Kraftstoffeinspritzventil - Google Patents
Kraftstoffeinspritzventil Download PDFInfo
- Publication number
- EP1541861A2 EP1541861A2 EP04106238A EP04106238A EP1541861A2 EP 1541861 A2 EP1541861 A2 EP 1541861A2 EP 04106238 A EP04106238 A EP 04106238A EP 04106238 A EP04106238 A EP 04106238A EP 1541861 A2 EP1541861 A2 EP 1541861A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- fuel injection
- injection valve
- bellows
- bore
- 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- Withdrawn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
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0035—Poppet valves, i.e. having a mushroom-shaped valve member that moves perpendicularly to the plane of the valve seat
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- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
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- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
- F02M2200/707—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms
Definitions
- the invention relates to a fuel injection valve with a Device for sealing an actuator against a leakage space, wherein the actuator is arranged in a bore, with a valve operatively connected to the actuator and with a leakage discharge connected to the leakage chamber.
- a fuel injection valve to provide in which the cited Disadvantages are eliminated, especially the actuator reliable sealed against fuel leakage. Furthermore
- the fuel injector should have a long service life distinguished.
- the fuel injection valve comprises between the actuator and the leakage space in the bore axially sliding transmission element.
- the transmission element a first area adjacent to the actuator and designed as a projection, facing the valve second area up.
- a bellows with a first end on the projection and at a second end on a wall of the bore circumferentially tightly fastened. The one on the ledge and on the wall the bore arranged bellows ensures that the incoming fuel is not in contact with the actuator comes. Since the bellows at its second end with the not The movable wall of the hole is fixed, which stretches Bellows at every stroke of the transmission element or the lead with.
- the bellows substantially in its Basic form a cylindrical shape, wherein the bellows in Cross section has a wavy course.
- the bellows made of metal, preferably made of steel, which gives it sufficient elasticity in the direction of movement of the transmission element and a sufficient stability is obtained transverse to the direction of movement.
- the metallic bellows with the preferably metallic projection as well as preferably made of metal wall material fit, in particular via a weld, securely and reliably sealingly connected become. Because during the injection process no friction occurs between the bellows and other components, works this seal according to the invention of the actuator approximately wear-free, which in terms of operational safety and the life of the fuel injection valve particularly is advantageous. Although the bellows exerts an undesirable Damping of the actuator movement, but due to their amount is negligible.
- an intermediate element disposed between the actuator and the leakage chamber in the bore.
- the intermediate element which is formed with an opening is, lies with an outer wall sealingly on the inner wall the bore, wherein the projection through the opening extends.
- the bellows with the second end on the intermediate element preferably in the area of the opening, circumferentially tightly fastened and prevents fuel flow from the leakage space through the opening of the intermediate element.
- the leakage room is through the bellows and by the preferably non-positive Connection of the intermediate element with the inner wall of the bore Reliably encapsulated by the actuator.
- the intermediate element can for example be connected via a press fit with the bore be.
- the intermediate element So reliable the outgoing force from the actuator can be transferred to the valve, has the intermediate element a distance to the first region of the transmission element on. It should be paid attention in this context be that during the lifting movement, the transmission element not contacted the intermediate element. An abutment of the transmission element For example, to the intermediate element slipping of the intermediate element from its seat entail, allowing a reliable seal of the actuator is no longer guaranteed.
- FIG. 1 shows a sectional view the essential components of a fuel injection valve with a device for sealing an actuator against a leakage room.
- the fuel injection valve 1 has an actuator 2, the is arranged in a bore 4 of a housing 16.
- the out Actuator 2 existing piezoelectric material is immediately on an axially displaceable transmission element 7, which in the present embodiment with a first and a second region 8, 9 is formed.
- the first area 8 contacts the lower portion of the actuator 2 and the second area 9 is designed as a projection (pin), the has substantially the shape of a cylinder.
- the lead 9 lies with its free end at one within a Valve plate 17 arranged valve 5, which in Active connection with the actuator 2 is.
- the valve 5 is on a valve seat 11 and is located in the illustrated Embodiment in a closed position.
- the valve 5 in this case seals a control chamber 18 of the fuel injection valve 1, in which fuel is present at high pressure.
- Of the Control chamber 18 is in operative connection with a nozzle needle, which starts an injection depending on its position or completed.
- the pressure in the control room indicates the position of the nozzle needle in front.
- annular sealing element 14 Between the first region 8 of the transmission element 7 and the inner wall of the bore 4 is an annular sealing element 14 arranged.
- the sealing element 14 which is an O-ring in the illustrated Figure 1, in one, the inner wall of the bore 4 facing groove 15 of the first Area 8 of the transmission element 7 was added.
- the O-ring 14 may be made of an elastic material, for example or made of metal and by pressing in the Annular groove 15 are deformed so that a seal of the actuator 2 is achieved.
- An essential task of the O-ring is the centering function for the transmission element and the bellows. On this way, lateral forces can be reduced to the bellows and thus the durability can be improved.
- an intermediate element 12 which in a press fit on the Inner wall of the bore 4 is fixed.
- the distance is about 0.5mm.
- the designed as a compression ring intermediate element 12 has the center an opening 13 through which the cylindrical projection 9 in a between the intermediate element 12 and the valve 5 located leakage space 3 protrudes.
- the intermediate element 12 and the transmission element 7 consist in the illustrated Embodiment of metal.
- the intermediate element 12 has a cup shape in cross section, wherein the cylindrical Outer wall rests against the inner wall of the bore 4.
- the fuel injection valve 1 has a bellows 10 for an additional sealing of the actuator 2 against the leakage space 3, with a first end on the projection 9 and at a second end on the intermediate element 12 circumferentially sealed is attached.
- the second end of the bellows 10 is here arranged at the opening 13 of the intermediate element 12.
- the metal bellows 10, in cross section is formed wavy, is with the intermediate element 12th and connected to the projection 9 by a weld 20,21, made for example in a laser welding process becomes.
- a weld 20,21 made for example in a laser welding process becomes.
- the length of the bellows 10 is in the way chosen that by an axial movement of the transmission element 7, the bellows 10 deforms elastically without im Essentially cause a damping of the actuator movement.
- One of the advantages of using the bellows 10 is that despite high material loads due to the high Switching speeds of the actuator 2 a good, durable Seal the actuator 2 created against the leakage chamber 3 becomes.
- the bellows 10 has a high elasticity with respect to the Aktorl Kunststoffsdehnung and requires little Space, as this immediately along the extension of the Projection 9 is applied, which for a compact design of the Fuel injector 1 beneficially affects.
- the leakage chamber 3 is through the inner wall of the bore 4, the intermediate element 12, the bellows 10, the wall of the valve plate 17 and through the in the closed position located valve 5 limited.
- the valve 5 is opened, so that fuel flows from the control chamber 18 and the nozzle needle is lifted off a sealing seat and fuel is discharged from the fuel injection valve.
- the valve 5 is closed. Since the control room is connected to an inlet, the rises Pressure again and the nozzle needle is pressed onto the sealing seat. This ends the injection.
- the leakage chamber 3 is closed a side with a arranged in the housing 16 leakage discharge 6 connected.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims (8)
- Kraftstoffeinspritzventil (1) mit einer Vorrichtung zum Abdichten eines Aktors (2) gegen einen Leckageraum (3), wobei der Aktor (2) in einer Bohrung (4) angeordnet ist, mit einem mit dem Aktor (2) in Wirkverbindung stehenden Ventil (5) und mit einer mit dem Leckageraum (3) verbundenen Leckageabführung (6), dadurch gekennzeichnet, dass zwischen dem Aktor (2) und dem Leckageraum (3) ein in der Bohrung (4) axial verschiebbares Übertragungselement (7) angeordnet ist, das einen am Aktor (2) anliegenden ersten Bereich (8) und einen als Vorsprung ausgebildeten, dem Ventil (5) zugewandten zweiten Bereich (9) aufweist, dass ein Faltenbalg (10) mit einem ersten Ende am Vorsprung (9) und an einem zweiten Ende an einer Wandung der Bohrung (4) umlaufend dicht befestigt ist, so dass der Faltenbalg (10) den Aktor (2) gegen den Leckageraum (3) abdichtet.
- Kraftstoffeinspritzventil (1) nach Anspruch 1, dadurch gekennzeichnet, dass ein Zwischenelement (12) zwischen dem Aktor (2) und dem Leckageraum (6) in der Bohrung (4) angeordnet ist, dass das Zwischenelement (12) mit einer Außenwand abdichtend an der Innenwand der Bohrung (4) anliegt, dass das Zwischenelement (12) eine Öffnung (13) aufweist, dass sich der Vorsprung (9) durch die Öffnung (13) erstreckt, dass der Faltenbalg (10) mit dem zweiten Ende am Zwischenelement (12) umlaufend dicht befestigt ist, und dass das Zwischenelement (12) einen Abstand zum ersten Bereich (8) des Übertragungselementes (7) aufweist.
- Kraftstoffeinspritzventil (1) nach Anspruch 2, dadurch gekennzeichnet, dass das Zwischenelement (12) kraftschlüssig mit der Bohrung (4) verbunden ist.
- Kraftstoffeinspritzventil (1) nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Zwischenelement (12) ein Pressring ist.
- Kraftstoffeinspritzventil (1) nach einem der oben genannten Ansprüche, dadurch gekennzeichnet, dass der Faltenbalg (10) am Vorsprung (9) und an der Wandung der Bohrung (4) stoffschlüssig verbunden ist.
- Kraftstoffeinspritzventil (1) nach einem der oben genannten Ansprüche, dadurch gekennzeichnet, dass der Faltenbalg (10) aus Metall besteht.
- Kraftstoffeinspritzventil (1) nach einem der oben genannten Ansprüche, dadurch gekennzeichnet, dass ein ringförmiges Dichtungselement (14) zwischen dem ersten Bereich (8) des Übertragungselementes (7) und der Innenwand der Bohrung (4) angeordnet ist.
- Kraftstoffeinspritzventil (1) nach Anspruch 7, dadurch gekennzeichnet, dass der erste Bereich (8) mit einer Nut (15) ausgebildet ist, in der das Dichtungselement (14) aufgenommen ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10357768 | 2003-12-10 | ||
| DE10357768 | 2003-12-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1541861A2 true EP1541861A2 (de) | 2005-06-15 |
| EP1541861A3 EP1541861A3 (de) | 2007-10-24 |
Family
ID=34485297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04106238A Withdrawn EP1541861A3 (de) | 2003-12-10 | 2004-12-02 | Kraftstoffeinspritzventil |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1541861A3 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011045298A1 (de) * | 2009-10-12 | 2011-04-21 | Ulrich Stieler Kunststoff Service E.K. | Fluid-injektor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19548526A1 (de) | 1995-12-22 | 1997-07-03 | Daimler Benz Ag | Einspritzventil |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19946831C1 (de) * | 1999-09-30 | 2001-07-12 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
| DE10026642A1 (de) * | 2000-05-29 | 2001-12-13 | Siemens Ag | Einspritzventil mit einem Zulaufventil zu einer Arbeitskammer |
-
2004
- 2004-12-02 EP EP04106238A patent/EP1541861A3/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19548526A1 (de) | 1995-12-22 | 1997-07-03 | Daimler Benz Ag | Einspritzventil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011045298A1 (de) * | 2009-10-12 | 2011-04-21 | Ulrich Stieler Kunststoff Service E.K. | Fluid-injektor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1541861A3 (de) | 2007-10-24 |
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| 17P | Request for examination filed |
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Owner name: CONTINENTAL AUTOMOTIVE GMBH |
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| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB IT |
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| RBV | Designated contracting states (corrected) |
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| 17Q | First examination report despatched |
Effective date: 20100224 |
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| RIC1 | Information provided on ipc code assigned before grant |
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