EP1431569B1 - Fuel injector - Google Patents
Fuel injector Download PDFInfo
- Publication number
- EP1431569B1 EP1431569B1 EP20030015166 EP03015166A EP1431569B1 EP 1431569 B1 EP1431569 B1 EP 1431569B1 EP 20030015166 EP20030015166 EP 20030015166 EP 03015166 A EP03015166 A EP 03015166A EP 1431569 B1 EP1431569 B1 EP 1431569B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- fuel injection
- diaphragm
- valve needle
- 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.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 38
- 238000002347 injection Methods 0.000 claims description 23
- 239000007924 injection Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 210000004379 membrane Anatomy 0.000 description 33
- 239000012528 membrane Substances 0.000 description 32
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
-
- 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
- F02M61/166—Selection of particular materials
Definitions
- the invention relates to a fuel injection valve according to the preamble of claim 1.
- a fuel injection valve with a piezoelectric or magnetostrictive actuator known, which is in operative connection with a valve needle.
- the valve needle has at its discharge end a valve closing body which cooperates with a valve seat surface to a sealing seat.
- the actuator is movably mounted with a first end in a spherical recesses of an upper stop and acts with its movable into a spherical recess second end via a transmission module on the valve needle.
- the two spherical segment-shaped ends of the actuator mounted in the spherical recesses compensate for centering errors and unevennesses on the surfaces of the ends of the actuator.
- a disadvantage of the fuel injection valve known from the above publication is in particular the complicated production of the two ball segment-shaped ends formed actuator and the receiving devices of these ends in the fuel injection valve.
- the spherical segment-shaped ends of the actuator must be processed consuming and strength-reducing or the actuator must have a correspondingly formed holding body in which it is self-supporting. The additional holding body increases the manufacturing and assembly costs.
- the DE 199 28 916 A1 discloses a fuel injector having a piezoelectric or magnetostrictive actuator disposed in an actuator chamber of a valve housing of the fuel injector, the actuator chamber being sealed by a fuel seal, and having an actuator actuatable valve closure member cooperating with a valve seat surface to form a sealing seat.
- the seal has a sealing body designed as an actuator pot and a resiliently deformable and band-shaped sealing element which is connected to the sealing body by a first circumferential weld and which is connected to the valve housing by a second circumferential weld seam.
- the fuel injection valve according to the invention with the features of claim 1 has the advantage that the design effort for storage of the actuator is substantially simplified and reduced.
- the second end of the actuator can be run and stored dry without sliding friction losses.
- the installation of the actuator in the fuel injection valve is considerably simplified.
- the membrane consists of metal, in particular of steel.
- the elasticity, the flexibility, the temperature resistance and the joining properties can be positively influenced.
- the membrane is formed in a hole-disc-shaped manner. Thereby it is u. a. possible that the valve needle can reach through the membrane. If the valve needle engages through the membrane, a simple and compact construction of the fuel injection valve is possible in a simple manner.
- the membrane in half-shell shape in cross section.
- the guiding property, flexibility and elasticity can be easily adjusted thereby.
- the membrane has at least one opening. Through the opening also the flexibility and elasticity of the membrane can be influenced. In addition, it is thereby possible to relieve the membrane of pressure loads from adjacent fuel, since the fuel can flow through the at least one opening.
- the membrane on its inner circumference with the valve needle and on its outer circumference with the housing cohesively, in particular by welding or laser welding to add hermetically sealed.
- the membrane can thereby also act in particular sealing, for example, to keep fuel from the actuator.
- this makes it possible to produce particularly strong and easily reproducible joint connections.
- the membrane is advantageous to form-fit the membrane on its inner circumference with the valve needle and on its outer circumference with the housing.
- the membrane can be mounted particularly simple and advantageous.
- the membrane on its inner circumference with the valve needle material fit, in particular by welding or laser welding, and to add on its outer circumference form-fitting manner with the housing.
- the membrane can thereby be particularly firmly connected to the valve needle and at the same time, for example together with the valve needle, particularly easy to be mounted in the fuel injection valve.
- the membrane at least partially axially guides the valve needle and thus indirectly guides the second end of the actuator.
- FIG. 1 An in Fig. 1 in an axial sectional view of the invention shown fuel injector 1 is used in particular for the direct injection of fuel into a combustion chamber of a mixture-compressing, spark-ignited internal combustion engine.
- a compensation device 5 In a cylindrical housing 2, a compensation device 5, an actuator 4, a valve needle 3, a spring element 6 and a membrane 8 are arranged.
- the piston-shaped actuator 4 which is preferably constructed of disc-shaped piezoelectric or magnetostrictive elements not shown in more detail, is arranged between the valve needle 3 and the compensation device 5.
- the compensation device 5 is used to compensate for thermally induced changes in length of the actuator. 4
- the actuator 4 has a first end 12 and a second end 13, which run parallel to each other.
- the first end 12 of the actuator 4 rests on the planar side of the compensating device 5 facing it, wherein the opposite, spherical-segment-shaped side of the compensating device 5 engages in a bearing 7 arranged at the end remote from the housing 2.
- the bearing 7 formed by a spherical recesses, the spherical segment-shaped side of the compensation device 5 can slide.
- the valve needle 3 is located with its spray-off plan end on the second end 13 and is held by the standing under constant bias spring element 6, which is on the one hand to the balancer 5 and on the other hand to the valve needle 3, in constant contact.
- the spring element 6 is formed spirally and surrounds the actuator 4 radially.
- the valve needle 3 passes through the hole-disk-shaped and coaxially arranged membrane 8.
- the hole-disk-shaped membrane 8 has a half-shell-shaped cross section, that is to say the membrane. h., That the closed course of the membrane 8 is formed throughout half-shell-shaped and thus in the cross section of the membrane 8 show two half-shell-shaped formations.
- the membrane 8 is made of steel. Due to its flexibility and elasticity, the membrane 8 axially guides the valve needle 3, wherein the actuator 4, which is in frictional connection and positive engagement with the valve needle 3, is also guided thereby.
- the membrane 8 is materially joined by laser welding by means of a weld 10 on the inner circumference of the valve needle 3 and the outer circumference of the housing 2 hermetically sealed. The membrane 8 thus sealed the actuator 4 of fuel, which flows from the discharge side.
- an unillustrated valve closing body is formed on the valve needle 3, which is not with a shown valve seat surface cooperates to a sealing seat.
- a valve seat body not shown, at least one ejection opening, not shown, is formed. The fuel is supplied via a laterally formed in the housing 2 not shown fuel supply and guided to the sealing seat.
- the piezoelectric actuator 4 supplied via an unillustrated, electronic control unit and a plug contact an electrical excitation voltage, expand the not-shown disc-shaped piezoelectric elements of the actuator 4 against the bias of the spring element 6 and a biasing spring, not shown, and move the valve needle 3 in Abspritzutter, whereby fuel is sprayed in a known manner.
- Fig. 2 shows a fragmentary schematic representation of the fuel injection valve 1 according to the invention in the region of the membrane 8, similar to the illustration Fig. 1 ,
- the membrane 8 has a plurality of openings 11 and is connected at the outer periphery by positive engagement with the housing 2.
- the outer circumference of the membrane 8, which is inclined by the half-shell shape to ejection openings, not shown, is supported on a shoulder 9 from.
- the shoulder 9 is realized by an inner diameter reduction in the housing 2. In rest position, the outer circumference of the diaphragm 8 presses on the shoulder 9.
- the positive engagement of the outer periphery of the diaphragm 8 can also be realized by a not shown recesses in the inner periphery of the housing 2 positively in both axial direction sense.
- the openings 11 are used in particular for pressure relief of the membrane 8, so that the membrane 8, for example, does not release from the form-fitting by the discharge side existing pressurized fuel.
- the invention may, for. B. also be used for inward-opening fuel injectors.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Anspruchs 1.The invention relates to a fuel injection valve according to the preamble of claim 1.
Beispielsweise ist aus der
Nachteilig bei dem aus der obengenannten Druckschrift bekannten Brennstoffeinspritzventil ist insbesondere die aufwendige Herstellung des mit zwei kugelsegmentförmigen Enden ausgebildeten Aktors und der Aufnahmevorrichtungen dieser Enden im Brennstoffeinspritzventil. Zur Herstellung der kugelsegmentförmigen Enden muß der Aktor aufwendig und festigkeitsmindernd bearbeitet werden oder der Aktor muß über einen entsprechend ausgebildeten Haltekörper verfügen, in welchem er selbst gelagert ist. Der zusätzliche Haltekörper erhöht den Herstellungs- und Montageaufwand.A disadvantage of the fuel injection valve known from the above publication is in particular the complicated production of the two ball segment-shaped ends formed actuator and the receiving devices of these ends in the fuel injection valve. For the production the spherical segment-shaped ends of the actuator must be processed consuming and strength-reducing or the actuator must have a correspondingly formed holding body in which it is self-supporting. The additional holding body increases the manufacturing and assembly costs.
Die
Das erfindungsgemäße Brennstoffeinspritzventil mit den Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß der konstruktive Aufwand zur Lagerung des Aktors wesentlich vereinfacht und reduziert ist. Das zweite Ende des Aktors kann trocken, ohne Gleitreibungsverluste geführt und gelagert werden. Außerdem wird die Montage des Aktors im Brennstoffeinspritzventil wesentlich vereinfacht.The fuel injection valve according to the invention with the features of claim 1 has the advantage that the design effort for storage of the actuator is substantially simplified and reduced. The second end of the actuator can be run and stored dry without sliding friction losses. In addition, the installation of the actuator in the fuel injection valve is considerably simplified.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterentwicklungen des im Anspruch 1 angegebenen Brennstoffeinspritzventils möglich.The measures listed in the dependent claims advantageous developments of the fuel injection valve specified in claim 1 are possible.
In einer ersten Weiterbildung des erfindungsgemäßen Brennstoffeinspritzventils besteht die Membran aus Metall, insbesondere aus Stahl. Insbesondere die Elastizität, die Flexibilität, die Temperaturbeständigkeit und die Fügeeigenschaften können so positiv beeinflußt werden.In a first development of the fuel injection valve according to the invention, the membrane consists of metal, in particular of steel. In particular, the elasticity, the flexibility, the temperature resistance and the joining properties can be positively influenced.
Erfindungsgemäß ist, die Membran lochscheibenförmig ausgebildet. Dadurch ist es u. a. möglich, daß die Ventilnadel durch die Membran greifen kann. Greift die Ventilnadel durch die Membran, so ist dadurch eine einfache und kompakte Bauweise des Brennstoffeinspritzventils in einfacher Weise möglich.According to the invention, the membrane is formed in a hole-disc-shaped manner. Thereby it is u. a. possible that the valve needle can reach through the membrane. If the valve needle engages through the membrane, a simple and compact construction of the fuel injection valve is possible in a simple manner.
Außerdem ist es vorteilhaft die Membran im Querschnitt halbschalenförmig auszubilden. Die Führungseigenschaft, die Flexibilität und Elastizität können dadurch in einfacher Weise eingestellt werden.In addition, it is advantageous to form the membrane in half-shell shape in cross section. The guiding property, flexibility and elasticity can be easily adjusted thereby.
Erfindungsgemäß weist die Membran zumindest eine Öffnung auf. Durch die Öffnung kann ebenfalls die Flexibilität und Elastizität der Membran beeinflußt werden. Außerdem ist es dadurch möglich die Membran von Druckbelastungen von anliegendem Brennstoff zu entlasten, da der Brennstoff durch die zumindest eine Öffnung strömen kann.According to the invention, the membrane has at least one opening. Through the opening also the flexibility and elasticity of the membrane can be influenced. In addition, it is thereby possible to relieve the membrane of pressure loads from adjacent fuel, since the fuel can flow through the at least one opening.
Vorteilhaft ist es außerdem, die Membran an ihrem Innenumfang mit der Ventilnadel und an ihrem Außenumfang mit dem Gehäuse stoffschlüssig, insbesondere durch Schweißen bzw. Laserschweißen, hermetisch dicht zu fügen. Die Membran kann dadurch insbesondere auch abdichtend wirken, um beispielsweise Brennstoff vom Aktor fernzuhalten. Außerdem können dadurch besonders feste und gut reproduzierbare Fügeverbindungen hergestellt werden können.It is also advantageous, the membrane on its inner circumference with the valve needle and on its outer circumference with the housing cohesively, in particular by welding or laser welding to add hermetically sealed. The membrane can thereby also act in particular sealing, for example, to keep fuel from the actuator. In addition, this makes it possible to produce particularly strong and easily reproducible joint connections.
Im Weiteren ist es vorteilhaft, die Membran an ihrem Innenumfang mit der Ventilnadel und an ihrem Außenumfang mit dem Gehäuse formschlüssig zu fügen. Die Membran kann dadurch besonders einfach und vorteilhaft montiert werden.Furthermore, it is advantageous to form-fit the membrane on its inner circumference with the valve needle and on its outer circumference with the housing. The membrane can be mounted particularly simple and advantageous.
Vorteilhaft ist zudem, die Membran an ihrem Innenumfang mit der Ventilnadel stoffschlüssig, insbesondere durch Schweißen oder Laserschweißen, und an ihrem Außenumfang formschlüssig mit dem Gehäuse zu fügen. Die Membran kann dadurch mit der Ventilnadel besonders fest verbunden werden und gleichzeitig, beispielsweise zusammen mit der Ventilnadel, besonders einfach im Brennstoffeinspritzventil montiert werden.It is also advantageous, the membrane on its inner circumference with the valve needle material fit, in particular by welding or laser welding, and to add on its outer circumference form-fitting manner with the housing. The membrane can thereby be particularly firmly connected to the valve needle and at the same time, for example together with the valve needle, particularly easy to be mounted in the fuel injection valve.
In einer letzten vorteilhaften Weiterbildung des erfindungsgemäßen Brennstoffeinspritzventils führt die Membran wenigstens teilweise die Ventilnadel axial und führt somit mittelbar das zweite Ende des Aktors.In a last advantageous development of the fuel injection valve according to the invention, the membrane at least partially axially guides the valve needle and thus indirectly guides the second end of the actuator.
Die Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:
- Fig. 1
- eine schematische axiale Schnittdarstellung des erfindungsgemäßen Brennstoffeinspritzventils
- Fig. 2
- eine ausschnittsweise schematische Darstellung des erfindungsgemäßen Brennstoffeinspritzventils im Bereich der Membran.
- Fig. 1
- a schematic axial sectional view of the fuel injection valve according to the invention
- Fig. 2
- a fragmentary schematic representation of the fuel injection valve according to the invention in the region of the membrane.
Übereinstimmende Bauteile sind dabei in den Figuren mit übereinstimmenden Bezugszeichen versehen.Matching components are provided in the figures with corresponding reference numerals.
Ein in
In einem zylinderförmigen Gehäuse 2 ist eine Ausgleichseinrichtung 5, ein Aktor 4, eine Ventilnadel 3, ein Federelements 6 und eine Membran 8 angeordnet.In a
Der kolbenförmige Aktor 4, der vorzugsweise aus nicht näher dargestellten, scheibenförmigen piezoelektrischen oder magnetostriktiven Elementen aufgebaut ist, ist zwischen der Ventilnadel 3 und der Ausgleichseinrichtung 5 angeordnet. Die Ausgleichseinrichtung 5 dient zum Ausgleich von thermisch bedingten Längenänderungen des Aktors 4.The piston-
Der Aktor 4 weist ein erstes Ende 12 und ein zweites Ende 13 auf, die zueinander parallel verlaufen. Das erste Ende 12 des Aktors 4 liegt auf der ihm zugewandten, planen Seite der Ausgleichseinrichtung 5 auf, wobei die dabei gegenüberliegende, kugelsegmentförmige Seite der Ausgleichseinrichtung 5 in ein am abspritzfernen Ende des Gehäuses 2 angeordnetes Lager 7 eingreift. In dem durch eine sphärische Ausnehmungen gebildeten Lager 7 kann die kugelsegmentförmige Seite der Ausgleichseinrichtung 5 gleiten. Die Ventilnadel 3 liegt mit ihrem abspritzfernen, planen Ende auf dem zweiten Ende 13 auf und wird durch das unter ständiger Vorspannung stehende Federelement 6, welches einerseits an der Ausgleichseinrichtung 5 und andererseits an der Ventilnadel 3 befestigt ist, in ständiger Anlage gehalten. Das Federelement 6 ist spiralförmig ausgebildet und umgibt den Aktor 4 radial.The
Erfindungsgemäss durchgreift die Ventilnadel 3 die lochscheibenförmig ausgebildete und dazu koaxial angeordnete Membran 8. Weiter ist die lochscheibenförmige Membran 8 im Querschnitt halbschalenförmig ausgebildet, d. h., daß der geschlossene Verlauf der Membran 8 durchgängig halbschalenförmig ausgebildet ist und sich so im Querschnitt der Membran 8 zwei halbschalenförmige Ausbildungen zeigen. Die Membran 8 besteht aus Stahl. Durch ihre Flexibilität und Elastizität führt die Membran 8 die Ventilnadel 3 axial, wobei der Aktor 4, welcher mit der Ventilnadel 3 in Kraftschluß und Formschluß steht, dadurch ebenfalls geführt ist. Weiter ist die Membran 8 stoffschlüssig durch Laserschweißen mittels einer Schweißnaht 10 am Innenumfang der Ventilnadel 3 und am Außenumfang am Gehäuse 2 hermetisch dicht gefügt. Die Membran 8 dichtete so den Aktor 4 von Brennstoff ab, welcher abspritzseitig zufließt.According to the invention, the
In einem nicht dargestellten abspritzseitigen Abschnitt ist an der Ventilnadel 3 ein nicht dargestellter Ventilschließkörper ausgebildet, der mit einer nicht dargestellten Ventilsitzfläche zu einem Dichtsitz zusammenwirkt. In einem nicht dargestellten Ventilsitzkörper ist mindestens eine nicht dargestellte Abspritzöffnung ausgebildet. Der Brennstoff wird über eine seitlich im Gehäuse 2 ausgebildete nicht dargestellte Brennstoffzufuhr zugeleitet und zum Dichtsitz geführt.In a discharge-side section, not shown, an unillustrated valve closing body is formed on the
Wird dem piezoelektrischen Aktor 4 über ein nicht dargestelltes, elektronisches Steuergerät und einen Steckkontakt eine elektrische Erregungsspannung zugeführt, dehnen sich die nicht näher dargestellten scheibenförmigen piezoelektrischen Elemente des Aktor 4 entgegen der Vorspannung des Federelements 6 und einer nicht dargestellten Vorspannfeder aus und bewegen die Ventilnadel 3 in Abspritzrichtung, wodurch Brennstoff in bekannter Weise abgespritzt wird.If the
Die Öffnungen 11 dienen insbesondere zur Druckentlastung der Membran 8, so daß sich durch den abspritzseitig vorhandenen druckbehafteten Brennstoff die Membran 8 beispielsweise nicht aus dem Formschluß löst.The
Die Erfindung kann z. B. auch für nach innen öffnende Brennstoffeinspritzventile verwendet werden.The invention may, for. B. also be used for inward-opening fuel injectors.
- 11
- BrennstoffeinspritzventilFuel injector
- 22
- Gehäusecasing
- 33
- Ventilnadelvalve needle
- 44
- Aktoractuator
- 55
- Ausgleichseinrichtungbalancer
- 66
- Federelementspring element
- 77
- Lagerschalebearing shell
- 88th
- Membranmembrane
- 99
- Schultershoulder
- 1010
- SchweißnahtWeld
- 1111
- Öffnungopening
- 1212
- erstes Endefirst end
- 1313
- zweites Endesecond end
Claims (7)
- Fuel injection valve (1), in particular for the direct injection of fuel into a combustion space of an internal combustion engine, with a piezoelectric, electrostrictive or magnetostrictive actuator (4), and with a valve needle (3) operatively connected to the actuator (4) and having a valve-closing body which cooperates with a valve-seat surface to form a sealing seat, the actuator (4) being indirectly or directly mounted movably with a first end (12), and the other, second end (13) acting on the valve needle (3), characterized in that the valve needle (3) is guided axially in an elastic and flexible diaphragm (8) designed in the form of a perforated disc, the actuator (4), which is connected non-positively and positively to the valve needle (3), thereby likewise being guided, and the diaphragm (8) having at least one orifice (11) serving for pressure relief.
- Fuel injection valve according to Claim 1, characterized in that the diaphragm (8) consists of metal, in particular of steel.
- Fuel injection valve according to Claim 1 or 2, characterized in that the diaphragm (8) is designed in cross section in the form of a half-shell.
- Fuel injection valve according to one of the preceding claims, characterized in that the diaphragm (8) is joined in a hermetically sealing manner on its inner circumference to the valve needle (3) and on its outer circumference to a housing (2) materially integrally, in particular by welding or laser welding.
- Fuel injection valve according to one of Claims 1 - 3, characterized in that the diaphragm (8) is joined positively on its inner circumference to the valve needle (3) and on its outer circumference to a housing (2).
- Fuel injection valve according to one of Claims 1 - 3, characterized in that the diaphragm (8) is joined on its inner circumference to the valve needle (3) in a hermetically sealing manner and materially integrally, in particular by welding or laser welding, and on its outer circumference to a housing (2) positively.
- Fuel injection valve according to one of the preceding claims, characterized in that the diaphragm (8) guides the valve needle (20) at least partially axially and thus indirectly guides the second end (13) of the actuator (4) axially.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2002159800 DE10259800A1 (en) | 2002-12-19 | 2002-12-19 | Fuel injector |
| DE10259800 | 2002-12-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1431569A2 EP1431569A2 (en) | 2004-06-23 |
| EP1431569A3 EP1431569A3 (en) | 2005-11-30 |
| EP1431569B1 true EP1431569B1 (en) | 2009-09-23 |
Family
ID=32336492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20030015166 Expired - Lifetime EP1431569B1 (en) | 2002-12-19 | 2003-07-04 | Fuel injector |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1431569B1 (en) |
| DE (2) | DE10259800A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180063889A (en) * | 2015-10-09 | 2018-06-12 | 콘티넨탈 오토모티브 게엠베하 | Fluid injector for internal combustion engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2936425A1 (en) * | 1979-09-08 | 1981-04-02 | Robert Bosch Gmbh, 7000 Stuttgart | ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE |
| DE4005455A1 (en) * | 1989-02-28 | 1990-08-30 | Volkswagen Ag | Dosing valve for vehicle IC engine fuel injection - has piezoelectric actuator and spring membrane seal for closing force |
| DE19708304C2 (en) | 1997-02-28 | 1999-09-30 | Siemens Ag | Movement transmission device and injection valve with a movement transmission device |
| DE19928916B4 (en) * | 1999-06-24 | 2017-12-14 | Robert Bosch Gmbh | Fuel injector |
| EP1170500A1 (en) * | 2000-07-03 | 2002-01-09 | Med S.p.A. | Fuel injection valve for internal combustion engines |
| DE10046661A1 (en) * | 2000-09-20 | 2002-04-04 | Bosch Gmbh Robert | Piezoactuator e.g. for fuel injector of IC engine, has piezoelement clamped between head and foot parts, and casing attached securely to foot part in sealed manner |
-
2002
- 2002-12-19 DE DE2002159800 patent/DE10259800A1/en not_active Withdrawn
-
2003
- 2003-07-04 DE DE50311942T patent/DE50311942D1/en not_active Expired - Lifetime
- 2003-07-04 EP EP20030015166 patent/EP1431569B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180063889A (en) * | 2015-10-09 | 2018-06-12 | 콘티넨탈 오토모티브 게엠베하 | Fluid injector for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1431569A2 (en) | 2004-06-23 |
| DE10259800A1 (en) | 2004-07-01 |
| EP1431569A3 (en) | 2005-11-30 |
| DE50311942D1 (en) | 2009-11-05 |
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