EP2440769B1 - Injection valve with a transmission assembly - Google Patents

Injection valve with a transmission assembly Download PDF

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Publication number
EP2440769B1
EP2440769B1 EP10721180.7A EP10721180A EP2440769B1 EP 2440769 B1 EP2440769 B1 EP 2440769B1 EP 10721180 A EP10721180 A EP 10721180A EP 2440769 B1 EP2440769 B1 EP 2440769B1
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EP
European Patent Office
Prior art keywords
pot
piston
injection valve
nozzle needle
chamber
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.)
Not-in-force
Application number
EP10721180.7A
Other languages
German (de)
French (fr)
Other versions
EP2440769A1 (en
Inventor
Sven Jaime Salcedo
Michael Knoller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
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Continental Automotive GmbH
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Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2440769A1 publication Critical patent/EP2440769A1/en
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Publication of EP2440769B1 publication Critical patent/EP2440769B1/en
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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
    • 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
    • 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
    • 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
    • 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
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions

Description

Die Erfindung betrifft ein Einspritzventil mit einer Übertragungseinheit gemäß Patentanspruch 1.The invention relates to an injection valve with a transmission unit according to claim 1.

Im Stand der Technik sind beispielsweise aus DE102004035313 A1 WO 2008/003347 A1 , US 6,575,138 B2 und US 6,298,829 Einspritzventile bekannt, bei denen zwischen einem Aktor und der Düsennadel eine hydraulische Übertragungseinheit vorgesehen ist.For example, in the prior art DE102004035313 A1 WO 2008/003347 A1 . US 6,575,138 B2 and US 6,298,829 Injectors known in which an hydraulic transmission unit is provided between an actuator and the nozzle needle.

In dem bekannten Stand der Technik wird die Auslenkung des Aktors in eine entsprechende Auslenkung der Düsennadel übertragen.In the known state of the art, the deflection of the actuator is transferred to a corresponding deflection of the nozzle needle.

Die Aufgabe der Erfindung besteht darin, eine verbesserte Übertragungseinheit für ein Einspritzventil bereitzustellen.The object of the invention is to provide an improved transmission unit for an injection valve.

Die Aufgabe der Erfindung wird durch das Einspritzventil gemäß Patentanspruch 1 gelöst. Das beschriebene Einspritzventil weist den Vorteil auf, dass die Übertragungseinheit einen verbesserten Aufbau aufweist.The object of the invention is achieved by the injection valve according to claim 1. The injection valve described has the advantage that the transmission unit has an improved structure.

Dazu weist die Übertragungseinheit zwei bewegliche Kolben auf, wobei zwischen den zwei Kolben ein beweglicher Topf angeordnet ist, wobei der bewegliche Topf in einem weiteren feststehenden Topf geführt ist, wobei der erste Kolben durch eine Öffnung des Bodens des weiteren Topfes mit einem dritten Dichtspalt geführt ist, wobei der zweite Kolben in einen hülsenförmigen Abschnitt des Topfes mit einem fünften Dichtspalt geführt ist, wobei zwischen dem weiteren Topf und dem Topf eine erste Kammer ausgebildet ist, wobei zwischen dem Topf und dem zweiten Kolben eine zweite Kammer ausgebildet ist, wobei die zwei Kammern über wenigstens einen Kanal miteinander verbunden sind und wobei ein Kolben mit der Düsennadel und der andere Kolben mit dem Aktor in Wirkverbindung steht. Mit Hilfe dieser Ausführungsform wird eine Übertragungseinheit bereitgestellt,
die zuverlässig eine Übertragung der Auslenkung des Aktors auf die Düsennadel ermöglicht.For this purpose, the transfer unit has two movable pistons, wherein a movable pot is arranged between the two pistons, wherein the movable pot is guided in a further fixed pot, wherein the first piston is guided through an opening in the bottom of the further pot with a third sealing gap wherein the second piston is guided in a sleeve-shaped portion of the pot with a fifth sealing gap, wherein between the further pot and the pot, a first chamber is formed, wherein between the pot and the second piston, a second chamber is formed, wherein the two chambers are connected to each other via at least one channel and wherein a piston with the nozzle needle and the other piston is in operative connection with the actuator. With the aid of this embodiment, a transmission unit is provided,
which reliably enables a transmission of the deflection of the actuator on the nozzle needle.

In einer Ausführungsform ist zwischen der Düsennadel und dem beweglichen Topf ein Federelement eingespannt, das den beweglichen Topf in Richtung auf den ersten Kolben vorspannt. Damit wird eine Vorspannung der Düsennadel in Richtung auf einen Dichtsitz ermöglicht.In one embodiment, a spring element is clamped between the nozzle needle and the movable pot, which biases the movable pot in the direction of the first piston. This allows a bias of the nozzle needle in the direction of a sealing seat.

In einer weiteren Ausführungsform liegt der erste Kolben auf einer Außenseite des Bodens des beweglichen Topfes auf. Damit wird ein Leerhub präzise eingestellt.In a further embodiment, the first piston rests on an outer side of the bottom of the movable pot. This will set an idle stroke precisely.

In einer weiteren Ausführungsform sind zwei Kanäle vorgesehen, die die zwei Kammern miteinander verbinden, wobei die zwei Kanäle in dem Boden des beweglichen Topfes eingebracht sind. Durch die Ausbildung von zwei Kanälen ist ein schneller Druckausgleich zwischen den zwei Kammern möglich.In a further embodiment, two channels are provided, which connect the two chambers with each other, wherein the two channels are inserted in the bottom of the movable pot. Due to the formation of two channels, a quick pressure equalization between the two chambers is possible.

In einer weiteren Ausführungsform begrenzt der zweite Kolben in einer zweiten Stirnfläche die zweite Kammer, wobei der weitere Topf mit einer zweiten Ringfläche, die den ersten Kolben umgibt, die erste Kammer begrenzt. Die zweite Stirnfläche des zweiten Kolbens ist dabei vorzugsweise kleiner ausgebildet als die zweite Ringfläche des weiteren Topfes. Auf diese Weise wird eine Übersetzung der Auslenkung des Aktors in eine größere Auslenkung der Düsennadel ermöglicht. Somit können kleine Auslenkungen, beispielsweise eines piezoelektrischen Aktors, in größere Auslenkungen der Düsennadel umgesetzt werden.In a further embodiment, the second piston limits the second chamber in a second end face, wherein the further pot with a second annular surface which surrounds the first piston delimits the first chamber. The second end face of the second piston is preferably formed smaller than the second annular surface of the other pot. In this way, a translation of the deflection of the actuator is made possible in a larger deflection of the nozzle needle. Thus, small deflections, such as a piezoelectric actuator, can be converted into larger deflections of the nozzle needle.

Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. Es zeigen:

Figur 1
einen schematischen Aufbau eines Einspritzventils;
Figur 2
die Übertragungseinheit;
Figur 3
einen Düsenkörper mit Düsennadel;
Figur 4
eine Düsennadel mit zweitem Topf;
Figur 5
eine Düsennadel mit feststehendem Topf; und
Figur 6
eine Düsennadel mit Übertragungskolben.
The invention will be explained in more detail below with reference to FIGS. Show it:
FIG. 1
a schematic structure of an injection valve;
FIG. 2
the transmission unit;
FIG. 3
a nozzle body with nozzle needle;
FIG. 4
a nozzle needle with a second pot;
FIG. 5
a nozzle needle with a fixed pot; and
FIG. 6
a nozzle needle with transmission piston.

Figur 1 zeigt in einer schematischen Darstellung ein Einspritzventil 1, das ein Gehäuse 2 aufweist, an dessen unteren Ende ein Düsenkörper 3 mit Hilfe einer Spannmutter 4 befestigt ist. Im Düsenkörper 3 ist eine Düsennadel 5 in Längsrichtung beweglich gelagert. Die Düsennadel 5 steht über eine Übertragungseinheit 40 mit einem Aktor 7 in Wirkverbindung. Im unteren Bereich des Düsenkörpers 2 ist zwischen der Düsennadel 5 und dem Düsenkörper 3 ein Kraftstoffraum 8 ausgebildet, der über nicht dargestellte Kanäle mit Kraftstoff, beispielsweise über einen Kraftstoffspeicher und/oder über eine Kraftstoffpumpe versorgt wird. Zwischen dem Kraftstoffraum 8 und Einspritzlöchern 9 ist ein ringförmiger Dichtsitz 10 an der Innenseite des Düsenkörpers 3 ausgebildet. Dem Dichtsitz 10 ist eine ringförmig umlaufende Dichtfläche 11 am unteren Ende der Düsennadel 5 zugeordnet. Abhängig von der Position der Düsennadel, die durch die Betätigung des Aktors 7 eingestellt wird, hebt die Düsennadel 5 vom Dichtsitz 10 ab und gibt eine hydraulische Verbindung zwischen dem Kraftstoffraum 8 und den Einspritzlöchern 9 frei. FIG. 1 shows in a schematic representation of an injection valve 1, which has a housing 2, at the lower end of a nozzle body 3 by means of a clamping nut 4 is fixed. In the nozzle body 3, a nozzle needle 5 is movably mounted in the longitudinal direction. The nozzle needle 5 is connected via a transmission unit 40 with an actuator 7 in operative connection. In the lower region of the nozzle body 2, a fuel chamber 8 is formed between the nozzle needle 5 and the nozzle body 3, which is supplied via channels, not shown, with fuel, for example via a fuel reservoir and / or a fuel pump. Between the fuel chamber 8 and injection holes 9, an annular sealing seat 10 is formed on the inside of the nozzle body 3. The sealing seat 10 is associated with an annular peripheral sealing surface 11 at the lower end of the nozzle needle 5. Depending on the position of the nozzle needle, which is adjusted by the actuation of the actuator 7, the nozzle needle 5 lifts off from the sealing seat 10 and releases a hydraulic connection between the fuel chamber 8 and the injection holes 9.

Der Aktor 7 kann beispielsweise als piezoelektrischer Aktor oder als magnetischer Aktor ausgebildet sein. Durch eine elektrische Bestromung des Aktors 7 verlängert sich der Aktor 7 und wirkt damit auf die Übertragungseinheit 40 ein. Die Übertragungseinheit 40 ist in der Weise ausgebildet, dass die Auslenkung des Aktors 7 auf die Düsennadel 5 übertragen wird. Vorzugsweise wird die Auslenkung des Aktors 7 in Richtung auf die Düsennadel 5 in eine entgegen gesetzte Bewegung der Düsennadel 5 in Richtung auf den Aktor 7 mit Hilfe der Übertragungseinheit 40 umgesetzt.The actuator 7 may be formed, for example, as a piezoelectric actuator or as a magnetic actuator. By an electrical energization of the actuator 7, the actuator 7 extends and thus acts on the transmission unit 40 a. The transmission unit 40 is formed in such a way that the deflection of the actuator 7 is transmitted to the nozzle needle 5. Preferably, the deflection of the actuator 7 in the direction of the nozzle needle 5 in an opposite movement of the nozzle needle 5 implemented in the direction of the actuator 7 by means of the transmission unit 40.

Figur 2 zeigt eine vergrößerte Darstellung der Übertragungseinheit 40. In der Übertragungseinheit 40 ragt ein zylinderförmiger erster Kolben 12 durch eine Öffnung 15 eines Bodens 13 eines Topfes 14. Der Topf 14 ist über einen ringscheibenförmig umlaufenden Randbereich 41 fest mit dem Gehäuse 2 verbunden. Im Randbereich 41 sind Bohrungen 6 eingebracht, durch die Kraftstoff von einem oberen Innenraum des Einspritzventils zu einem unteren Innenraum des Einspritzventils fließen kann. In dem Topf 14 ist ein zweiter hülsenförmiger Topf 42 angeordnet, der beweglich in einem hülsenförmigen Abschnitt des Topfes 14 gelagert ist. In den hülsenförmigen Abschnitt des zweiten Topfes 42 ist ein zylinderförmiges Endstück 17 der Düsennadel 5 geführt. Das Endstück 17 stellt einen Kolben dar. Der erste Kolben 12 liegt mit der Stirnfläche 28 auf einer Oberseite eines zweiten Bodens 43 des zweiten Topfes 42 an. Im zweiten Boden 43 sind zwei Kanäle 44, 45 eingebracht. Zwischen dem ersten und dem zweiten Topf 14, 42 und dem ersten Kolben 12 ist eine erste Kammer 46 ausgebildet. Zwischen dem zweiten Topf 42 und dem Endstück 17 ist eine zweite Kammer 47 ausgebildet. FIG. 2 shows an enlarged view of the transfer unit 40. In the transfer unit 40 projects a cylindrical first piston 12 through an opening 15 of a bottom 13 of a pot 14. The pot 14 is connected via an annular disk-shaped peripheral edge portion 41 fixed to the housing 2. In the edge region 41 bores 6 are introduced, can flow through the fuel from an upper interior of the injection valve to a lower interior of the injection valve. In the pot 14, a second sleeve-shaped pot 42 is arranged, which is movably mounted in a sleeve-shaped portion of the pot 14. In the sleeve-shaped portion of the second pot 42, a cylindrical end piece 17 of the nozzle needle 5 is guided. The end piece 17 represents a piston. The first piston 12 rests with the end face 28 on an upper side of a second bottom 43 of the second pot 42. In the second bottom 43 two channels 44, 45 are introduced. Between the first and the second pot 14, 42 and the first piston 12, a first chamber 46 is formed. Between the second pot 42 and the end piece 17, a second chamber 47 is formed.

Der erste Topf 14 begrenzt mit einer zweiten Ringfläche 52, die auf einer Innenseite des Bodens 13 ausgebildet ist, die erste Kammer 46. Das Endstück 17 begrenzt mit einer zweiten Stirnfläche 53 die zweite Kammer 47. Vorzugsweise ist die zweite Stirnfläche 53 kleiner als die zweite Ringfläche 52. Insbesondere ist die zweite Stirnfläche 53 halb so groß, wie die zweite Ringfläche. Das Flächenverhältnis zwischen der zweiten Stirnfläche 53 und der zweiten Ringfläche legt eine Übersetzung zwischen der Auslenkung des Aktors und der Auslenkung der Düsennadel fest. Zwischen dem zweiten Topf 42 und der Düsennadel 5 ist ein drittes Federelement 48 gespannt. Der erste und der zweite Kanal 44, 45 verbinden die erste und die zweite Kammer 46, 47. Der erste Kolben 12 ist über einen dritten Dichtspalt 49 im Boden 13 dichtend geführt.The first pot 14 defines, with a second annular surface 52 formed on an inner side of the bottom 13, the first chamber 46. The end piece 17 defines with a second end surface 53 the second chamber 47. Preferably, the second end surface 53 is smaller than the second Ring surface 52. In particular, the second end face 53 is half as large as the second annular surface. The area ratio between the second end surface 53 and the second annular surface defines a translation between the deflection of the actuator and the deflection of the nozzle needle. Between the second pot 42 and the nozzle needle 5, a third spring element 48 is tensioned. The first and the second channel 44, 45 connect the first and the second chamber 46, 47. The first piston 12 is sealingly guided in the bottom 13 via a third sealing gap 49.

Der zweite Topf 42 ist über einen vierten Dichtspalt 50 in einem hülsenförmigen Abschnitt des feststehenden Topfes 14 dichtend geführt. Das Endstück 17 ist über einen fünften Dichtspalt 51 in dem hülsenförmigen Abschnitt des zweiten Topfes 42 dichtend geführt. Der dritte, vierte und fünfte Dichtspalt 49, 50, 51 können vorzugsweise eine Breite von 2 bis 20 µm, insbesondere im Bereich von 8 µm, aufweisen. Der dritte, vierte und fünfte Dichtspalt 49, 50, 51 sind in der Weise bemessen, dass die erste und zweite Kammer, die mit Kraftstoff gefüllt sind, gegenüber dem Innenraum des Einspritzventils bei einer kurzzeitigen Druckbeaufschlagung, die bei Einspritzvorgängen auftritt, abgedichtet sind. Der dritte, vierte und fünfte Dichtspalt 49, 50, 51 sorgen dafür, dass die erste und zweite Kammer 46, 47 immer mit Kraftstoff gefüllt ist und sich Druckunterschiede, die über längere Zeiträume, d.h. länger als Einspritzvorgänge vorhanden sind, ausgleichen.The second pot 42 is sealingly guided over a fourth sealing gap 50 in a sleeve-shaped portion of the fixed pot 14. The end piece 17 is sealingly guided over a fifth sealing gap 51 in the sleeve-shaped portion of the second pot 42. The third, fourth and fifth sealing gaps 49, 50, 51 may preferably have a width of 2 to 20 μm, in particular in the range of 8 μm. The third, fourth and fifth sealing gaps 49, 50, 51 are dimensioned such that the first and second chambers, which are filled with fuel, are sealed against the interior of the injection valve during a brief pressurization, which occurs during injection operations. The third, fourth and fifth sealing gaps 49, 50, 51 ensure that the first and second chambers 46, 47 are always filled with fuel and that there are pressure differences that are present over extended periods, i. longer than injection operations are available, compensate.

Die Übertragungseinheit 40 funktioniert wie folgt: im nicht angesteuerten Zustand des Aktors 7 sitzt die Düsennadel 5 mit der Dichtfläche 11 auf dem Dichtsitz 10 auf, so dass keine Verbindung zwischen dem Kraftstoffraum 8 und den Einspritzlöchern 9 vorliegt. Somit wird kein Kraftstoff eingespritzt. Dabei liegt der Aktor 7 an dem ersten Kolben 12 an. Der erste Kolben 12 liegt an dem zweiten Boden 43 des zweiten beweglichen Topfes 42 an und drückt somit über das dritte Federelement 48 die Düsennadel 5 in den Dichtsitz. Die erste und die zweite Kammer 46, 47 sind vollständig mit Kraftstoff gefüllt, wobei auch das Gehäuse 2 im Bereich der Übertragungseinheit 40 mit Kraftstoff gefüllt ist.The transmission unit 40 functions as follows: in the non-activated state of the actuator 7, the nozzle needle 5 is seated with the sealing surface 11 on the sealing seat 10, so that there is no connection between the fuel chamber 8 and the injection holes 9. Thus, no fuel is injected. In this case, the actuator 7 abuts against the first piston 12. The first piston 12 abuts against the second bottom 43 of the second movable pot 42 and thus presses the nozzle needle 5 into the sealing seat via the third spring element 48. The first and second chambers 46, 47 are completely filled with fuel, and the housing 2 is also filled with fuel in the area of the transfer unit 40.

Wird nun eine Einspritzung durchgeführt, so wird der Aktor 7 bestromt, so dass sich der Aktor nach unten in Richtung auf die Übertragungseinheit 40 bewegt. Dazu ist der Aktor 7 im oberen Bereich gegen das Gehäuse 2 des Einspritzventils abgestützt. Durch die Bewegung des Aktors 7 wird der erste Kolben 12 nach unten geschoben. Der erste Kolben 12 schiebt den zweiten Topf 42 nach unten. Damit wird der Druck in der zweiten Kammer 47 erhöht, so dass Kraftstoff aus der zweiten Kammer 47 über den ersten und den zweiten Kanal 44, 45 in die erste Kammer 46 strömt. Als Folge davon sinkt der Druck in der zweiten Kammer 47, so dass sich die Düsennadel 5 nach oben bewegt und vom Dichtsitz 10 abhebt. Folglich beginnt die Einspritzung.If an injection is now carried out, then the actuator 7 is energized, so that the actuator moves downward in the direction of the transmission unit 40. For this purpose, the actuator 7 is supported in the upper region against the housing 2 of the injection valve. By the movement of the actuator 7, the first piston 12 is pushed down. The first piston 12 pushes the second pot 42 down. Thus, the pressure in the second chamber 47 is increased, so that fuel from the second chamber 47 via the first and the second channel 44, 45 flows into the first chamber 46. As a result, the pressure in the second chamber 47 decreases, so that the nozzle needle 5 moves upward and lifts off from the sealing seat 10. Consequently, the injection starts.

Soll die Einspritzung beendet werden, so wird der Aktor 7 in der Weise angesteuert, dass er sich verkürzt. Als Folge davon sinkt die Kraft auf den ersten Kolben 12 und damit auch auf den zweiten Topf 42. Folglich sinkt der Druck in der zweiten Kammer 47. Zudem bewirkt das dritte Federelement 48, dass die Düsennadel 5 aus der zweiten Hülse 42 herausgezogen wird. Folglich fließt Kraftstoff von der ersten Kammer in die zweite Kammer zurück und die Düsennadel 5 wird nach unten auf den Dichtsitz gedrückt.If the injection is to be ended, the actuator 7 is activated in such a way that it shortens. As a result, the force on the first piston 12 and thus also on the second pot 42 decreases. Consequently, the pressure in the second chamber 47 drops. In addition, the third spring element 48 causes the nozzle needle 5 to be pulled out of the second sleeve 42. Consequently, fuel flows back from the first chamber into the second chamber and the nozzle needle 5 is pressed down onto the sealing seat.

Figur 3 zeigt eine schematische Darstellung des Düsenkörpers 3 mit dem Endstück 17 der Düsennadel 5 und dem dritten Federelement 48, das an einer Abstufung der Düsennadel 5 aufliegt. FIG. 3 shows a schematic representation of the nozzle body 3 with the end piece 17 of the nozzle needle 5 and the third spring element 48, which rests on a gradation of the nozzle needle 5.

Figur 4 zeigt einen Querschnitt durch die zweite Hülse 42, die auf das Endstück 17 der Düsennadel aufgeschoben wird. Anschließend wird die Hülse 14 über die zweite Hülse 42 geschoben, wie in Figur 5 dargestellt ist. Dann wird der Kolben 12 durch die Öffnung des Bodens 13 eingeschoben, wie in Figur 6 dargestellt ist. Dann wird der Aktor 7 in dem Gehäuse montiert und die Baueinheit wie in Figur 1 gezeigt über die Spannmutter 4 mit dem Gehäuse 2 verspannt. Der obere und untere Innenraum 18, 19 des Einspritzventils 1 sind mit Kraftstoff gefüllt. FIG. 4 shows a cross section through the second sleeve 42, which is pushed onto the end piece 17 of the nozzle needle. Subsequently, the sleeve 14 is pushed over the second sleeve 42, as in FIG. 5 is shown. Then, the piston 12 is inserted through the opening of the bottom 13, as in FIG. 6 is shown. Then, the actuator 7 is mounted in the housing and the assembly as in FIG. 1 shown clamped on the clamping nut 4 with the housing 2. The upper and lower inner spaces 18, 19 of the injection valve 1 are filled with fuel.

Claims (6)

  1. Injection valve (1) for injecting fuel into an internal combustion engine, comprising an actuator (7), comprising a nozzle needle (5) which is assigned to a sealing seat (10), wherein a transmission unit (40) is provided which establishes an operative connection between the actuator (7) and the nozzle needle (5), characterized in that the transmission unit (40) has two movable pistons (12, 17), wherein a movable pot (42) is arranged between the two pistons (12, 17), wherein the movable pot (42) is guided via a fourth sealing gap (50) in a sleeve-shaped section of a further, fixed pot (14), wherein the first piston (12) is guided through an opening (15) in the bottom (13) of the further pot (14) with a third sealing gap (49), wherein the second piston (17) projects into a sleeve-shaped section of the pot (42) with a fifth sealing gap (51), wherein a first chamber (46) is formed between the further pot (42) and the pot (14), wherein a second chamber (47) is formed between the pot (42) and the second piston (17), wherein the two chambers (46, 47) are connected to one another via at least one duct (44, 45), wherein the sealing gaps (49, 50, 51) of the first and second chambers (46, 47) have a width of 2 to 20 µm, in particular a width of 8 µm, with the result that the first and second chambers (46, 47) are sealed with respect to an internal space of the injection valve for brief applications of pressure and equalize pressure differences over relatively long time periods, and wherein one piston (12, 17) is operatively connected to the nozzle needle (5), and the other piston (12, 17) is operatively connected to the actuator (7).
  2. Injection valve according to Claim 1, wherein a spring element (48), which prestresses the movable pot (42) in the direction of the first piston (12), is clamped in between the nozzle needle (5) and the movable pot (42).
  3. Injection valve according to one of Claims 1 and 2, wherein the first piston (12) rests on an upper side of a bottom (43) of the movable pot (42).
  4. Injection valve according to one of Claims 1 to 3, wherein two ducts (44, 45) are provided which connect the two chambers (46, 47), wherein the two ducts (44, 45) are formed in a bottom (43) of the movable pot (42).
  5. Injection valve according to one of Claims 1 to 4, wherein the second piston (17) bounds the second chamber (47) with a second end face (53), wherein the further pot (14) bounds the first chamber (46) with a second annular face (52) which surrounds the first piston (12), and wherein the second end face (53) is smaller than the second annular face (52).
  6. Injection valve according to one of Claims 1 to 5, wherein the fixed pot (14) is connected to the housing (2) via a disk-shaped edge region (41), wherein a drilled hole (6) is formed in the edge region (41), which drilled hole (6) connects an upper interior space of the injection valve to a lower interior space of the injection valve.
EP10721180.7A 2009-06-10 2010-06-10 Injection valve with a transmission assembly Not-in-force EP2440769B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009024596A DE102009024596A1 (en) 2009-06-10 2009-06-10 Injection valve with transmission unit
PCT/EP2010/058158 WO2010142767A1 (en) 2009-06-10 2010-06-10 Injection valve comprising a transmission unit

Publications (2)

Publication Number Publication Date
EP2440769A1 EP2440769A1 (en) 2012-04-18
EP2440769B1 true EP2440769B1 (en) 2018-02-28

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Application Number Title Priority Date Filing Date
EP10721180.7A Not-in-force EP2440769B1 (en) 2009-06-10 2010-06-10 Injection valve with a transmission assembly

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US (1) US9222451B2 (en)
EP (1) EP2440769B1 (en)
DE (1) DE102009024596A1 (en)
WO (1) WO2010142767A1 (en)

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US20120160214A1 (en) 2012-06-28
WO2010142767A1 (en) 2010-12-16
US9222451B2 (en) 2015-12-29
DE102009024596A1 (en) 2011-04-07
EP2440769A1 (en) 2012-04-18

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