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WO2007065746A1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

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Publication number
WO2007065746A1
WO2007065746A1 PCT/EP2006/067195 EP2006067195W WO2007065746A1 WO 2007065746 A1 WO2007065746 A1 WO 2007065746A1 EP 2006067195 W EP2006067195 W EP 2006067195W WO 2007065746 A1 WO2007065746 A1 WO 2007065746A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fuel injection
piece
closing body
injection valve
Prior art date
Application number
PCT/EP2006/067195
Other languages
German (de)
French (fr)
Inventor
Dietmar Greulich
Volker Knoedler
Oezguer Tuerker
Reiner Koch
Christian Faltin
Steffen Fuchs
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2007065746A1 publication Critical patent/WO2007065746A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8038—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of adhesives, glue or the like

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1.
  • valve closing body has the shape of a ball that is loosely inserted into the valve piece.
  • the valve piece can have a guide for the valve closing body, through which the valve closing body is loosely connected to the valve piece.
  • the object of the invention is to provide a fuel injector according to the preamble of claim 1, which has a reduced sensitivity to back pressure.
  • the object is in a fuel injection valve, in particular an injection valve for fuel injection systems of internal combustion engines, with a valve closing body which can be actuated by an actuating device by means of a valve needle body and which forms a valve seat surface Sealing seat cooperates and is connected to a valve piece which is attached to one end of the valve needle body, solved in that the valve piece and the valve closing body are formed in one piece.
  • a valve closing body which can be actuated by an actuating device by means of a valve needle body and which forms a valve seat surface Sealing seat cooperates and is connected to a valve piece which is attached to one end of the valve needle body, solved in that the valve piece and the valve closing body are formed in one piece.
  • valve closing body which is loosely connected to the guide, is released from the guide due to the flow forces acting at high back pressures and the associated pressure infiltration. This can lead to the valve closing body not reaching its full stroke above the valve seat surface. As a result, the fuel injector may not open fully. The valve closing body can then develop an undefined throttling effect.
  • the one-piece design of the valve piece and valve closing body can reliably prevent an undesired detachment of the valve closing body from the valve piece. This provides the advantage that the scatter in flow and switching times that occur during operation can be significantly reduced.
  • Further preferred exemplary embodiments of the fuel injection valve are characterized in that the valve closing body has the shape of a ball or a spherical section. This ensures that the sealing seat is properly sealed.
  • Another preferred exemplary embodiment of the fuel injector is characterized in that the valve piece and the valve closing body are formed from different materials.
  • the valve closing body is preferably made of a hardened material.
  • valve closing body is integrally connected to the valve piece.
  • the integral connection is realized, for example, by welding, soldering or gluing.
  • valve closing body is glued to the valve piece. This type of integral connection has the advantage that it can be implemented in terms of production technology with little effort.
  • valve closing body is connected in one piece to the valve piece.
  • the valve closing body can be partially hardened.
  • valve piece has a frustoconical section, on the tapering end of which the valve body is arranged. This can save installation space.
  • valve piece has a circular-cylindrical connecting section which connects the frustoconical section to the valve needle body. The two sections of the valve piece are connected to one another in one piece.
  • valve needle body is connected in one piece to the valve piece. This simplifies assembly. drawing
  • FIG. 1 shows a part of a fuel injector according to a first embodiment in longitudinal section
  • Figure 2 shows an enlarged section of Figure 1 according to a second embodiment. Description of the embodiments
  • FIG. 1 shows an exemplary embodiment of a fuel injector 1 according to the invention in an excerpted axial sectional view
  • Valve housing 2 of fuel injector 1 is composed of several components. To simplify the description and the drawing, the resulting connection points are not dealt with in more detail.
  • the fuel injection valve 1 is used in particular for the direct injection of fuel, in particular diesel fuel, into a combustion chamber of a mixture-compressing, self-igniting internal combustion engine.
  • the fuel injector 1 according to the invention is also suitable for other applications.
  • the valve housing 2 comprises a valve seat body 4 which has a central through hole 5.
  • the central through hole 5 serves to specifically reduce the pressure in a control chamber which is filled with fuel, as a result of which the fuel injection valve 1 is opened.
  • the central through hole 5 is equipped with an outlet throttle 6.
  • the control chamber 8 is partially limited by the valve seat body 4.
  • a valve closing body 7 which has the shape of a ball.
  • the valve seat body 7 can come into contact with a valve seat surface 9 which is formed on the side of the valve seat body 4 facing away from the control chamber 8 and delimits the central through hole 5. If the valve closing body 7 rests on the valve seat surface 9, the passage of fuel through the central through hole 5 is prevented. When the valve closing body 7 lifts off the valve seat surface 9, then fuel can escape through the central through hole 5 via the discharge throttle 6 from the control chamber 8.
  • the valve closing body 7 has the shape of a ball which is glued to a valve piece 10.
  • the valve piece 10 has the shape of a circular cylinder which tapers like a truncated cone at the end facing the valve seat surface 9.
  • the end of the valve piece 10 which tapers like a truncated cone has a central, spherical segment-shaped recess for receiving a complementary section of the valve closing body 7.
  • a material connection between the two parts is created.
  • the valve piece 10 is connected in one piece to a collar 12 of a valve needle body 14.
  • the valve needle body 14 is coupled at its end facing away from the collar 12 to a magnet armature 16 which cooperates in a known manner with a magnet coil 17 in order to actuate the fuel injection valve 1.
  • FIG. 2 a section from FIG. 1 is shown enlarged in accordance with a further exemplary embodiment.
  • a valve closing body 27 which has the shape of a spherical section, is connected in one piece to the valve piece 10.
  • the valve piece 10 is in turn connected in one piece to the valve needle body 14 via the collar 12.

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  • 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

The invention relates to a fuel injection valve, in particular an injection valve for fuel injection systems of internal combustion engines, having a valve closing body (27) which can be actuated by an actuating device by means of a valve needle body (14), interacts with a valve seat face (9) to form a sealing seat and is connected to a valve piece (10) which is attached to one end of the valve needle body (14). In order to provide a fuel injection valve which has a reduced sensitivity to back pressure, the valve piece (10) and the valve closing body (27) are configured in one piece.

Description

Brennstoffeinspritzventil Fuel injector
Die Erfindung betrifft ein Brennstoffeinspritzven- til gemäß dem Oberbegriff des Anspruchs 1. The invention relates to a fuel injection valve according to the preamble of claim 1.
Stand der Technik State of the art
Der Ventilschließkörper hat zum Beispiel die Ges- talt einer Kugel, die lose in das Ventilstück eingelegt ist. Das Ventilstück kann eine Führung für den Ventilschließkörper aufweisen, durch die der Ventilschließkörper lose mit dem Ventilstück verbunden ist. For example, the valve closing body has the shape of a ball that is loosely inserted into the valve piece. The valve piece can have a guide for the valve closing body, through which the valve closing body is loosely connected to the valve piece.
Aufgabe der Erfindung ist es, ein Brennstoffeinspritzventil gemäß dem Oberbegriff des Anspruchs 1 zu schaffen, das eine verminderte Gegendruckempfindlichkeit aufweist. The object of the invention is to provide a fuel injector according to the preamble of claim 1, which has a reduced sensitivity to back pressure.
Vorteile der Erfindung Advantages of the invention
Die Aufgabe ist bei einem Brennstoffeinspritzventil, insbesondere einem Einspritzventil für Brenn- stoffeinspritzanlagen von Brennkraftmaschinen, mit einem von einer Betätigungseinrichtung mittels eines Ventilnadelkörpers betätigbaren Ventilschließkörper, der mit einer Ventilsitzfläche zu einem Dichtsitz zusammenwirkt und mit einem Ventilstück verbunden ist, das an einem Ende des Ventilnadelkörpers angebracht ist, dadurch gelöst, dass das Ventilstück und der Ventilschließkörper einteilig ausgebildet sind. Bei im Rahmen der vorliegenden Erfindung durchgeführten Untersuchungen wurden am Rücklauf eines herkömmlichen Brennstoffeinspritz- ventils Messungen mit unterschiedlichen Drücken durchgeführt. Dabei wurde, insbesondere bei hohen Gegendrücken am Rücklauf, eine hohe Sensibilität des Brennstoffeinspritzventils festgestellt. Das ist unter anderem darauf zurückzuführen, dass sich der lose mit der Führung verbundene Ventilschließkörper durch die bei hohen Gegendrücken wirkenden Strömungskräfte und eine damit verbundene Druckunterwanderung aus der Führung löst. Das kann dazu führen, dass der Ventilschließkörper nicht seinen vollen Hub über der Ventilsitzfläche erreicht. Demzufolge kann es passieren, dass das Brennstoffein- spritzventil nicht vollständig öffnet. Der Ventilschließkörper kann dann eine Undefinierte Drosselwirkung entfalten. Durch die einteilige Ausbildung von Ventilstück und Ventilschließkörper kann ein unerwünschtes Lösen des Ventilschließkörpers von dem Ventilstück sicher verhindert werden. Das liefert den Vorteil, dass die im Betrieb auftretenden Streuungen des Durchflusses und der Schaltzeiten deutlich reduziert werden können. Weitere bevorzugte Ausführungsbeispiele des Brennstoffeinspritzventils sind dadurch gekennzeichnet, dass der Ventilschließkörper die Gestalt einer Kugel oder eines Kugelabschnitts aufweist. Dadurch wird eine gute Abdichtung des Dichtsitzes erreicht. Ein weiteres bevorzugtes Ausführungsbeispiel des Brennstoffeinspritzventils ist dadurch gekennzeichnet, dass das Ventilstück und der Ventilschließkörper aus unterschiedlichen Materialien gebildet sind. Vorzugsweise ist der Ventilschließkörper aus einem gehärteten Material hergestellt. The object is in a fuel injection valve, in particular an injection valve for fuel injection systems of internal combustion engines, with a valve closing body which can be actuated by an actuating device by means of a valve needle body and which forms a valve seat surface Sealing seat cooperates and is connected to a valve piece which is attached to one end of the valve needle body, solved in that the valve piece and the valve closing body are formed in one piece. In investigations carried out within the scope of the present invention, measurements were carried out at different pressures on the return of a conventional fuel injector. A high sensitivity of the fuel injector was found, especially with high backpressures on the return. This is due, among other things, to the fact that the valve closing body, which is loosely connected to the guide, is released from the guide due to the flow forces acting at high back pressures and the associated pressure infiltration. This can lead to the valve closing body not reaching its full stroke above the valve seat surface. As a result, the fuel injector may not open fully. The valve closing body can then develop an undefined throttling effect. The one-piece design of the valve piece and valve closing body can reliably prevent an undesired detachment of the valve closing body from the valve piece. This provides the advantage that the scatter in flow and switching times that occur during operation can be significantly reduced. Further preferred exemplary embodiments of the fuel injection valve are characterized in that the valve closing body has the shape of a ball or a spherical section. This ensures that the sealing seat is properly sealed. Another preferred exemplary embodiment of the fuel injector is characterized in that the valve piece and the valve closing body are formed from different materials. The valve closing body is preferably made of a hardened material.
Ein weiteres bevorzugtes Ausführungsbeispiel des Brennstoffeinspritzventils ist dadurch gekennzeich- net, dass der Ventilschließkörper stoffschlüssig mit dem Ventilstück verbunden ist. Die stoffschlüssige Verbindung wird zum Beispiel durch Schweißen, Löten oder Kleben realisiert. Ein weiteres bevorzugtes Ausführungsbeispiel des Brennstoffeinspritzventils ist dadurch gekennzeichnet, dass der Ventilschließkörper mit dem Ventilstück verklebt ist. Diese stoffschlüssige Verbindungsart hat den Vorteil, dass sie fertigungstech- nisch ohne großen Aufwand realisierbar ist. Another preferred exemplary embodiment of the fuel injector is characterized in that the valve closing body is integrally connected to the valve piece. The integral connection is realized, for example, by welding, soldering or gluing. Another preferred exemplary embodiment of the fuel injection valve is characterized in that the valve closing body is glued to the valve piece. This type of integral connection has the advantage that it can be implemented in terms of production technology with little effort.
Ein weiteres bevorzugtes Ausführungsbeispiel des Brennstoffeinspritzventils ist dadurch gekennzeichnet, dass der Ventilschließkörper einstückig mit dem Ventilstück verbunden ist. Der Ventilschließkörper kann partiell gehärtet werden. Another preferred exemplary embodiment of the fuel injection valve is characterized in that the valve closing body is connected in one piece to the valve piece. The valve closing body can be partially hardened.
Ein weiteres bevorzugtes Ausführungsbeispiel des Brennstoffeinspritzventils ist dadurch gekennzeich- net, dass das Ventilstück einen kegelstumpfartigen Abschnitt aufweist, an dessen sich verjüngendem Ende der Ventilkörper angeordnet ist. Dadurch kann Bauraum eingespart werden. Ein weiteres bevorzugtes Ausführungsbeispiel des Brennstoffeinspritzventils ist dadurch gekennzeichnet, dass das Ventilstück einen kreiszylinderförmi- gen Verbindungsabschnitt aufweist, der den kegel- stumpfartigen Abschnitt mit dem Ventilnadelkörper verbindet. Die beiden Abschnitte des Ventilstücks sind einstückig miteinander verbunden. Another preferred exemplary embodiment of the fuel injection valve is characterized in that the valve piece has a frustoconical section, on the tapering end of which the valve body is arranged. This can save installation space. Another preferred exemplary embodiment of the fuel injection valve is characterized in that the valve piece has a circular-cylindrical connecting section which connects the frustoconical section to the valve needle body. The two sections of the valve piece are connected to one another in one piece.
Ein weiteres bevorzugtes Ausführungsbeispiel des Brennstoffeinspritzventils ist dadurch gekennzeichnet, dass der Ventilnadelkörper einstückig mit dem Ventilstück verbunden ist. Dadurch wird die Montage vereinfacht . Zeichnung Another preferred exemplary embodiment of the fuel injector is characterized in that the valve needle body is connected in one piece to the valve piece. This simplifies assembly. drawing
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeich- nung verschiedene Ausführungsbeispiele im Einzelnen beschrieben sind. Es zeigen: Further advantages, features and details of the invention result from the following description, in which various exemplary embodiments are described in detail with reference to the drawing. Show it:
Figur 1 einen Teil eines Brennstoffeinspritzventils gemäß einem ersten Ausführungsbei- spiel im Längsschnitt und 1 shows a part of a fuel injector according to a first embodiment in longitudinal section and
Figur 2 einen vergrößerten Ausschnitt aus Figur 1 gemäß einem zweiten Ausführungsbeispiel. Beschreibung der Ausführungsbeispiele Figure 2 shows an enlarged section of Figure 1 according to a second embodiment. Description of the embodiments
Figur 1 zeigt in einer auszugsweisen axialen Schnittdarstellung ein Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils 1. Ein Ventilgehause 2 des Brennstoffeinspritzventils 1 ist aus mehreren Bauteilen zusammengesetzt. Zur Vereinfachung der Beschreibung und der Zeichnung wird auf die dadurch entstehenden Verbindungsstel- len nicht naher eingegangen. Das Brennstoffein- spritzventil 1 dient insbesondere zum direkten Einspritzen von Brennstoff, insbesondere von Dieselkraftstoff, in einen Brennraum einer gemischverdichtenden selbstzundenden Brennkraftmaschine. Das erfindungsgemaße Brennstoffeinspritzventil 1 eignet sich jedoch auch für andere Anwendungsfalle. FIG. 1 shows an exemplary embodiment of a fuel injector 1 according to the invention in an excerpted axial sectional view Valve housing 2 of fuel injector 1 is composed of several components. To simplify the description and the drawing, the resulting connection points are not dealt with in more detail. The fuel injection valve 1 is used in particular for the direct injection of fuel, in particular diesel fuel, into a combustion chamber of a mixture-compressing, self-igniting internal combustion engine. However, the fuel injector 1 according to the invention is also suitable for other applications.
Das Ventilgehause 2 umfasst einen Ventilsitzkorper 4, der ein zentrales Durchgangsloch 5 aufweist. Das zentrale Durchgangsloch 5 dient dazu, den Druck in einem Steuerraum, der mit Brennstoff gefüllt ist, gezielt abzubauen, wodurch ein Offnen des Brennstoffeinspritzventils 1 bewirkt wird. Das zentrale Durchgangsloch 5 ist mit einer Ablaufdrossel 6 aus- gestattet. The valve housing 2 comprises a valve seat body 4 which has a central through hole 5. The central through hole 5 serves to specifically reduce the pressure in a control chamber which is filled with fuel, as a result of which the fuel injection valve 1 is opened. The central through hole 5 is equipped with an outlet throttle 6.
Der Steuerraum 8 wird teilweise durch den Ventilsitzkorper 4 begrenzt. Auf der dem Steuerraum 8 abgewandten Seite des Ventilsitzkorpers 4 befindet sich ein Ventilschließkorper 7, der die Gestalt einer Kugel aufweist. Der Ventilsitzkorper 7 kann an einer Ventilsitzflache 9 zur Anlage kommen, die auf der dem Steuerraum 8 abgewandten Seite des Ventilsitzkorpers 4 ausgebildet ist und das zentrale Durchgangsloch 5 begrenzt. Wenn der Ventilschließkorper 7 an der Ventilsitzflache 9 anliegt, dann wird der Durchtritt von Brennstoff durch das zentrale Durchgangsloch 5 verhindert. Wenn der Ventilschließkorper 7 von der Ventilsitzflache 9 abhebt, dann kann Brennstoff durch das zentrale Durchgangsloch 5 über die Ablaufdrossel 6 aus dem Steuerraum 8 entweichen. Bei dem in Figur 1 dargestellten Ausführungsbeispiel hat der Ventilschließkörper 7 die Gestalt einer Kugel, die mit einem Ventilstück 10 verklebt ist. Das Ventilstück 10 hat die Gestalt eines Kreiszylinders, der sich an dem der Ventilsitzflä- che 9 zugewandten Ende kegelstumpfartig verjüngt. Das sich kegelstumpfartig verjüngende Ende des Ventilstücks 10 weist eine zentrale, kugelabschnitts- förmige Vertiefung zur Aufnahme eines komplementären Abschnitts des Ventilschließkörpers 7 auf. Durch das Verkleben des Ventilschließkörpers 7 mit dem Ventilstück 10 wird eine Stoffschlüssige Verbindung zwischen den beiden Teilen geschaffen. An seinem dem Ventilschließkörper 7 abgewandten Ende ist das Ventilstück 10 einstückig mit einem Bund 12 eines Ventilnadelkörpers 14 verbunden. Der Ventilnadelkörper 14 ist an seinem dem Bund 12 abgewandten Ende mit einem Magnetanker 16 gekoppelt, der in bekannter Art und Weise mit einer Magnetspule 17 zusammenwirkt, um das Brennstoffeinspritzventil 1 zu betätigen. The control chamber 8 is partially limited by the valve seat body 4. On the side of the valve seat body 4 facing away from the control chamber 8 there is a valve closing body 7 which has the shape of a ball. The valve seat body 7 can come into contact with a valve seat surface 9 which is formed on the side of the valve seat body 4 facing away from the control chamber 8 and delimits the central through hole 5. If the valve closing body 7 rests on the valve seat surface 9, the passage of fuel through the central through hole 5 is prevented. When the valve closing body 7 lifts off the valve seat surface 9, then fuel can escape through the central through hole 5 via the discharge throttle 6 from the control chamber 8. In the embodiment shown in Figure 1, the valve closing body 7 has the shape of a ball which is glued to a valve piece 10. The valve piece 10 has the shape of a circular cylinder which tapers like a truncated cone at the end facing the valve seat surface 9. The end of the valve piece 10 which tapers like a truncated cone has a central, spherical segment-shaped recess for receiving a complementary section of the valve closing body 7. By gluing the valve closing body 7 to the valve piece 10, a material connection between the two parts is created. At its end facing away from the valve closing body 7, the valve piece 10 is connected in one piece to a collar 12 of a valve needle body 14. The valve needle body 14 is coupled at its end facing away from the collar 12 to a magnet armature 16 which cooperates in a known manner with a magnet coil 17 in order to actuate the fuel injection valve 1.
In Figur 2 ist ein Ausschnitt aus Figur 1 gemäß einem weiteren Ausführungsbeispiel vergrößert dargestellt. Bei dem in Figur 2 dargestellten Ausfüh- rungsbeispiel ist ein Ventilschließkörper 27, der die Gestalt eines Kugelabschnitts aufweist, einstückig mit dem Ventilstück 10 verbunden. Das Ventilstück 10 wiederum ist über den Bund 12 einstückig mit dem Ventilnadelkörper 14 verbunden. In FIG. 2, a section from FIG. 1 is shown enlarged in accordance with a further exemplary embodiment. In the exemplary embodiment shown in FIG. 2, a valve closing body 27, which has the shape of a spherical section, is connected in one piece to the valve piece 10. The valve piece 10 is in turn connected in one piece to the valve needle body 14 via the collar 12.

Claims

Patentansprüche Claims
1. Brennstoffeinspritzventil, insbesondere Einspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen, mit einem von einer Betäti- gungseinrichtung mittels eines Ventilnadelkörpers (14) betätigbaren Ventilschließkörper (7;27), der mit einer Ventilsitzfläche (9) zu einem Dichtsitz zusammenwirkt und mit einem Ventilstück (10) verbunden ist, das an einem Ende des Ventilnadelkör- pers (14) angebracht ist, dadurch gekennzeichnet, dass das Ventilstück (10) und der Ventilschließkörper (7;27) einteilig ausgebildet sind. 1. Fuel injection valve, in particular injection valve for fuel injection systems of internal combustion engines, with a valve closing body (7; 27) which can be actuated by an actuating device by means of a valve needle body (14), which cooperates with a valve seat surface (9) to form a sealing seat and with a valve piece (10) is connected, which is attached to one end of the valve needle body (14), characterized in that the valve piece (10) and the valve closing body (7; 27) are formed in one piece.
2. Brennstoffeinspritzventil nach Anspruch 1, da- durch gekennzeichnet, dass der Ventilschließkörper2. Fuel injection valve according to claim 1, characterized in that the valve closing body
(7) die Gestalt einer Kugel aufweist. (7) has the shape of a sphere.
3. Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, dass der Ventilschließkörper (27) die Gestalt eines Kugelabschnitts aufweist. 3. Fuel injection valve according to claim 1, characterized in that the valve closing body (27) has the shape of a spherical section.
4. Brennstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilstück (10) und der Ventilschließkörper (7) aus unterschiedlichen Materialien gebildet sind. 4. Fuel injection valve according to one of the preceding claims, characterized in that the valve piece (10) and the valve closing body (7) are formed from different materials.
5. Brennstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Ventilschließkörper (7) stoffschlüssig mit dem Ventilstück verbunden ist. 5. Fuel injection valve according to one of the preceding claims, characterized in that the valve closing body (7) is integrally connected to the valve piece.
6. Brennstoffeinspritzventil nach Anspruch 5, da- durch gekennzeichnet, dass der Ventilschließkörper6. Fuel injection valve according to claim 5, characterized in that the valve closing body
(7) mit dem Ventilstück (10) verklebt ist. (7) is glued to the valve piece (10).
7. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Ven- tilschließkörper (27) einstückig mit dem Ventilstück (10) verbunden ist. 7. Fuel injection valve according to one of claims 1 to 3, characterized in that the valve closing body (27) is integrally connected to the valve piece (10).
8. Brennstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilstück (10) einen kegelstumpfartigen Abschnitt aufweist, an dessen sich verjüngendem Ende der Ventilkörper (7;27) angeordnet ist. 8. Fuel injection valve according to one of the preceding claims, characterized in that the valve piece (10) has a frustoconical section, on the tapering end of which the valve body (7; 27) is arranged.
9. Brennstoffeinspritzventil nach Anspruch 8, da- durch gekennzeichnet, dass das Ventilstück (10) einen kreiszylinderförmigen Verbindungsabschnitt aufweist, der den kegelstumpfartigen Abschnitt mit dem Ventilnadelkörper (14) verbindet. 9. Fuel injection valve according to claim 8, characterized in that the valve piece (10) has a circular-cylindrical connecting section which connects the frustoconical section to the valve needle body (14).
10. Brennstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Ventilnadelkörper (14) einstückig mit dem Ventilstück (10) verbunden ist. 10. Fuel injection valve according to one of the preceding claims, characterized in that the valve needle body (14) is integrally connected to the valve piece (10).
PCT/EP2006/067195 2005-12-05 2006-10-09 Fuel injection valve WO2007065746A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510057948 DE102005057948A1 (en) 2005-12-05 2005-12-05 Fuel injector
DE102005057948.5 2005-12-05

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PCT/EP2006/067195 WO2007065746A1 (en) 2005-12-05 2006-10-09 Fuel injection valve

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030668A (en) * 1976-06-17 1977-06-21 The Bendix Corporation Electromagnetically operated fuel injection valve
DE3318486A1 (en) * 1982-08-04 1984-02-09 Aisan Kogyo K.K., Obu, Aichi ELECTROMAGNETIC FUEL INJECTION VALVE
DE19712589C1 (en) * 1997-03-26 1998-06-04 Bosch Gmbh Robert Valve needle for solenoid-operated fuel-injector of IC engine
WO2002023036A1 (en) * 2000-09-18 2002-03-21 L'orange Gmbh Valve configuration for control valves
US6360440B1 (en) * 2000-09-13 2002-03-26 Delphi Technologies, Inc. Method for locating injector ball valve guide
DE10052604A1 (en) * 2000-10-24 2002-05-02 Bosch Gmbh Robert Solenoid valve for control of injection valve of IC engine with solenoid and movable armature and control valve element working together with valve seat for opening/closing fuel
US20030025007A1 (en) * 2001-08-06 2003-02-06 Siemens Automotive Corporation Closure member with armature strap
EP1319827A2 (en) * 2001-12-12 2003-06-18 Robert Bosch Gmbh Solenoid valve for controlling an injection valve of an internal combustion engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030668A (en) * 1976-06-17 1977-06-21 The Bendix Corporation Electromagnetically operated fuel injection valve
DE3318486A1 (en) * 1982-08-04 1984-02-09 Aisan Kogyo K.K., Obu, Aichi ELECTROMAGNETIC FUEL INJECTION VALVE
DE19712589C1 (en) * 1997-03-26 1998-06-04 Bosch Gmbh Robert Valve needle for solenoid-operated fuel-injector of IC engine
US6360440B1 (en) * 2000-09-13 2002-03-26 Delphi Technologies, Inc. Method for locating injector ball valve guide
WO2002023036A1 (en) * 2000-09-18 2002-03-21 L'orange Gmbh Valve configuration for control valves
DE10052604A1 (en) * 2000-10-24 2002-05-02 Bosch Gmbh Robert Solenoid valve for control of injection valve of IC engine with solenoid and movable armature and control valve element working together with valve seat for opening/closing fuel
US20030025007A1 (en) * 2001-08-06 2003-02-06 Siemens Automotive Corporation Closure member with armature strap
EP1319827A2 (en) * 2001-12-12 2003-06-18 Robert Bosch Gmbh Solenoid valve for controlling an injection valve of an internal combustion engine

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