EP2004985B1 - Line connection of a fuel injection device for an internal combustion engine - Google Patents

Line connection of a fuel injection device for an internal combustion engine Download PDF

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Publication number
EP2004985B1
EP2004985B1 EP07704539.1A EP07704539A EP2004985B1 EP 2004985 B1 EP2004985 B1 EP 2004985B1 EP 07704539 A EP07704539 A EP 07704539A EP 2004985 B1 EP2004985 B1 EP 2004985B1
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EP
European Patent Office
Prior art keywords
pressure line
high pressure
injector
opening
fuel injection
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Not-in-force
Application number
EP07704539.1A
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German (de)
French (fr)
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EP2004985A1 (en
Inventor
Thomas Pauer
Friedrich Boecking
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP2004985A1 publication Critical patent/EP2004985A1/en
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Publication of EP2004985B1 publication Critical patent/EP2004985B1/en
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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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails

Definitions

  • the invention relates to a fuel injection device for an internal combustion engine according to the preamble of claim 1, as in WO 94/20746 disclosed.
  • Such a fuel injection device is characterized by the EP 1 260 704 A known.
  • This fuel injection device has at least one high-pressure line and an injector connected thereto, through which fuel is injected in a cylinder of the internal combustion engine.
  • the high-pressure line has an opening in its periphery for each injector, which communicates with an inlet bore running in a housing of the injector via an additional connection line.
  • the connecting line is connected on the one hand to the high-pressure line and on the other hand to the housing of the injector. Because of the additional connecting line provided for each injector, this known fuel injector requires a great deal of manufacturing and assembly work.
  • the fuel injection device according to the invention with the features of claim 1 has the advantage that the high-pressure line can be fastened directly to a housing of the injector and thus no additional connection line is required and thus the Manufacturing and assembly costs of the fuel injection device is reduced.
  • the embodiment of claim 1 and 2 allows a secure seal the transition from the opening of the high pressure line to the mouth of the inlet bore without an additional sealing element is required.
  • the embodiment according to claim 4 allows a reduction in the load of the high-pressure line.
  • the embodiment according to claim 5 enables a stiffening of the high-pressure line in its connection region with the injector and also an attenuation of pressure oscillations in the high-pressure line and / or in the connection to the injector.
  • FIG. 1 a fuel injection device for an internal combustion engine in a schematic representation in a side view.
  • FIG. 2 the part of the fuel injection device in section along line II-II in FIG. 1 according to a first embodiment
  • FIG. 3 the part in a section along line VI-VI in FIG. 2
  • FIG. 4 the part in section along line II-II in FIG. 1 according to a modified embodiment.
  • a fuel injection device for an internal combustion engine preferably a motor vehicle is shown.
  • the internal combustion engine is preferably a self-igniting internal combustion engine and has a plurality of cylinders 6, which may be arranged in series or v-shaped.
  • the fuel injection device has a feed pump 10, is conveyed by the fuel from a reservoir 12 to at least one high-pressure pump 14.
  • fuel is conveyed under high pressure to injectors 16, wherein on each cylinder 6 each have an injector 16 is arranged, is injected through the fuel into the cylinder.
  • Each injector 16 includes a fuel injector and an electrically actuated actuator that controls the opening and closing of the fuel injector and thus fuel injection.
  • a high pressure line 20 Connected to the high pressure pump 14 is a high pressure line 20 through which the fuel delivered by the high pressure pump 14 is directed to the injectors 16. It can be provided that a single continuous high-pressure line 20 connects all the injectors 16 with the high-pressure pump 14 and the injectors 16 with each other. In an internal combustion engine with a V-shaped cylinder arrangement, the injectors 16 are one Cylinder bank by a respective high pressure line 20 to the high pressure pump 14 and interconnected. Alternatively, it can also be provided that a plurality of separate high-pressure lines 20 are provided which connect at least one injector 16 with the high-pressure pump 14 and / or at least two adjacent injectors 16 with each other. The tubular high pressure line 20 is directly connected to each injector 16, wherein several embodiments for the connection of the high pressure line 20 to the injector 16 are described below.
  • FIGS. 2 and 3 the connection of the high pressure line 20 is shown with the injector 16 according to a first embodiment.
  • a U-shaped receptacle 56 is provided for the high-pressure line 20, which is, however, open to the outside of the injector 16 facing away from the combustion chamber.
  • the receptacle 56 is formed as a slot in a circular cylindrical projection 58 of the housing 24 of the injector 16.
  • On the inner surface 60 of the housing 24 at the bottom of the receptacle 56 leads to the fuel injection valve leading inlet bore 30.
  • the outwardly facing end portion of the lug 58 is provided with an external thread 64.
  • the opening 22 in the high pressure line 20 is formed such that it widens outwards at least approximately conically.
  • the high pressure line 20 is inserted from the outside into the receptacle 56, wherein the opening 22 is placed on the surrounding the inlet bore 30 of the injector 16 collar 62.
  • the high pressure line 20 is held in the receptacle 56 by a clamping element 66 which is formed as a screwed onto the external thread 64 of the lug 58 clamping nut, which acts at least indirectly on the high pressure line 20.
  • a support member 68 is arranged, which on the one hand adapted to the surface of the high pressure line 20 has a concave depression and which allows a rotational movement of the clamping nut 66 with respect to the high pressure line 20.
  • an insert 70 in which at least one, a defined flow cross-section defining throttle point is formed.
  • a stiffening of the high pressure line 20 is achieved in the connection region with the injector 16.
  • a throttle point 72 is arranged in the connection of the high-pressure line 20 with the inlet bore 30 of the injector 16.
  • at least one throttle point 74 is arranged in the passage through the high-pressure line 20, which is particularly expedient when a plurality of injectors 16 are connected to one another by the high-pressure line 20.
  • a throttling point 74 is arranged in the insert 70 both before and after the opening 22. Through the throttle points 72,74, the propagation of pressure waves in the high pressure line 20 and between the injector 16 and the high pressure line 20 can be prevented or at least damped.
  • the insert 70 in the high pressure line 20 may also be provided in the first or second embodiment.
  • the opening 22 in the high-pressure line 20 is arranged centrically to the longitudinal axis 21 of the high-pressure line 20.
  • the opening 22 in the high-pressure line 20 is arranged eccentrically to the longitudinal axis 21.
  • the opening 22 is arranged such that it extends at least approximately tangentially to the inner wall of the high-pressure line 20.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine nach der Gattung des Anspruchs 1, wie in der WO 94/20746 offenbart.The invention relates to a fuel injection device for an internal combustion engine according to the preamble of claim 1, as in WO 94/20746 disclosed.

Eine solche Kraftstoffeinspritzeinrichtung ist durch die EP 1 260 704 A bekannt. Diese Kraftstoffeinspritzeinrichtung weist wenigstens eine Hochdruckleitung und einen mit dieser verbundenen Injektor auf, durch den in einem Zylinder der Brennkraftmaschine Kraftstoff eingespritzt wird. Die Hochdruckleitung weist in ihrem Umfang für jeden Injektor eine Öffnung auf, die mit einer in einem Gehäuse des Injektors verlaufenden Zulaufbohrung über eine zusätzliche Verbindungsleitung in Verbindung steht. Die Verbindungsleitung ist dabei einerseits mit der Hochdruckleitung und andererseits mit dem Gehäuse des Injektors verbunden. Wegen der für jeden Injektor vorgesehenen zusätzlichen Verbindungsleitung erfordert diese bekannte Kraftstoffeinspritzeinrichtung einen großen Fertigungs- und Montageaufwand.Such a fuel injection device is characterized by the EP 1 260 704 A known. This fuel injection device has at least one high-pressure line and an injector connected thereto, through which fuel is injected in a cylinder of the internal combustion engine. The high-pressure line has an opening in its periphery for each injector, which communicates with an inlet bore running in a housing of the injector via an additional connection line. The connecting line is connected on the one hand to the high-pressure line and on the other hand to the housing of the injector. Because of the additional connecting line provided for each injector, this known fuel injector requires a great deal of manufacturing and assembly work.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Kraftstoffeinspritzeinrichtung mit den Merkmalen gemäß Anspruch 1 hat demgegenüber den Vorteil, dass die Hochdruckleitung direkt an einem Gehäuse des Injektors befestigbar ist und somit keine zusätzliche Verbindungsleitung erforderlich ist und somit der Fertigungs- und Montageaufwand der Kraftstoffeinspritzeinrichtung verringert ist.The fuel injection device according to the invention with the features of claim 1 has the advantage that the high-pressure line can be fastened directly to a housing of the injector and thus no additional connection line is required and thus the Manufacturing and assembly costs of the fuel injection device is reduced.

In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Kraftstoffeinspritzeinrichtung angegeben. Die Ausbildung gemäß Anspruch 1 und 2 ermöglicht eine sichere Abdichtung des Übergangs von der Öffnung der Hochdruckleitung zur Mündung der Zulaufbohrung ohne dass ein zusätzliches Dichtelement erforderlich ist. Die Ausbildung gemäß Anspruch 4 ermöglicht eine Verringerung der Belastung der Hochdruckleitung. Die Ausbildung gemäß Anspruch 5 ermöglicht eine Versteifung der Hochdruckleitung in deren Verbindungsbereich mit dem Injektor und außerdem eine Dämpfung von Druckschwingungen in der Hochdruckleitung und/oder in der Verbindung zum Injektor.In the dependent claims advantageous refinements and developments of the fuel injection device according to the invention are given. The embodiment of claim 1 and 2 allows a secure seal the transition from the opening of the high pressure line to the mouth of the inlet bore without an additional sealing element is required. The embodiment according to claim 4 allows a reduction in the load of the high-pressure line. The embodiment according to claim 5 enables a stiffening of the high-pressure line in its connection region with the injector and also an attenuation of pressure oscillations in the high-pressure line and / or in the connection to the injector.

Offenbarung der ErfindungDisclosure of the invention Zeichnungdrawing

Mehrere Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine in schematischer Darstellung in einer Seitenansicht. Figur 2 den Teil der Kraftstoffeinspritzeinrichtung im Schnitt entlang Linie II-II in Figur 1 gemäß einem ersten Ausführungsbeispiel, Figur 3 den Teil in einem Schnitt entlang Linie VI-VI in Figur 2 und Figur 4 den Teil im Schnitt entlang Linie II-II in Figur 1 gemäß einer modifizierten Ausführung.Several embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it FIG. 1 a fuel injection device for an internal combustion engine in a schematic representation in a side view. FIG. 2 the part of the fuel injection device in section along line II-II in FIG. 1 according to a first embodiment, FIG. 3 the part in a section along line VI-VI in FIG. 2 and FIG. 4 the part in section along line II-II in FIG. 1 according to a modified embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In den Figuren 1 bis 4 ist eine Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine vorzugsweise eines Kraftfahrzeugs dargestellt. Die Brennkraftmaschine ist vorzugsweise eine selbstzündende Brennkraftmaschine und weist mehrere Zylinder 6 auf, die in Reihe oder v-förmig angeordnet sein können. Die Kraftstoffeinspritzeinrichtung weist eine Förderpumpe 10 auf, durch die Kraftstoff aus einem Vorratsbehälter 12 zu wenigstens einer Hochdruckpumpe 14 gefördert wird. Durch die Hochdruckpumpe 14 wird Kraftstoff unter Hochdruck zu Injektoren 16 gefördert, wobei an jedem Zylinder 6 jeweils ein Injektor 16 angeordnet ist, durch den in den Zylinder Kraftstoff eingespritzt wird. Jeder Injektor 16 umfasst ein Kraftstoffeinspritzventil und einen elektrisch betätigten Aktor, durch den das Öffnen und Schließen des Kraftstoffeinspritzventils und damit die Kraftstoffeinspritzung gesteuert wird.In the FIGS. 1 to 4 a fuel injection device for an internal combustion engine, preferably a motor vehicle is shown. The internal combustion engine is preferably a self-igniting internal combustion engine and has a plurality of cylinders 6, which may be arranged in series or v-shaped. The fuel injection device has a feed pump 10, is conveyed by the fuel from a reservoir 12 to at least one high-pressure pump 14. By the high-pressure pump 14 fuel is conveyed under high pressure to injectors 16, wherein on each cylinder 6 each have an injector 16 is arranged, is injected through the fuel into the cylinder. Each injector 16 includes a fuel injector and an electrically actuated actuator that controls the opening and closing of the fuel injector and thus fuel injection.

Mit der Hochdruckpumpe 14 ist eine Hochdruckleitung 20 verbunden, durch die der von der Hochdruckpumpe 14 geförderte Kraftstoff zu den Injektoren 16 geleitet wird. Es kann vorgesehen sein, dass eine einzige durchgehende Hochdruckleitung 20 alle Injektoren 16 mit der Hochdruckpumpe 14 und die Injektoren 16 untereinander verbindet. Bei einer Brennkraftmaschine mit v-förmiger Zylinderanordnung sind dabei die Injektoren 16 einer Zylinderbank durch jeweils eine Hochdruckleitung 20 mit der Hochdruckpumpe 14 und untereinander verbunden. Alternativ kann auch vorgesehen sein, dass mehrere separate Hochdruckleitungen 20 vorgesehen sind, die wenigstens einen Injektor 16 mit der Hochdruckpumpe 14 und/oder wenigstens zwei benachbarte Injektoren 16 miteinander verbinden. Die rohrförmig ausgebildete Hochdruckleitung 20 ist mit jedem Injektor 16 direkt verbunden, wobei nachfolgend mehrere Ausführungsbeispiele für die Verbindung der Hochdruckleitung 20 mit dem Injektor 16 beschrieben werden.Connected to the high pressure pump 14 is a high pressure line 20 through which the fuel delivered by the high pressure pump 14 is directed to the injectors 16. It can be provided that a single continuous high-pressure line 20 connects all the injectors 16 with the high-pressure pump 14 and the injectors 16 with each other. In an internal combustion engine with a V-shaped cylinder arrangement, the injectors 16 are one Cylinder bank by a respective high pressure line 20 to the high pressure pump 14 and interconnected. Alternatively, it can also be provided that a plurality of separate high-pressure lines 20 are provided which connect at least one injector 16 with the high-pressure pump 14 and / or at least two adjacent injectors 16 with each other. The tubular high pressure line 20 is directly connected to each injector 16, wherein several embodiments for the connection of the high pressure line 20 to the injector 16 are described below.

In den Figuren 2 und 3 ist die Verbindung der Hochdruckleitung 20 mit dem Injektor 16 gemäß einem ersten Ausführungsbeispiel dargestellt. Am Gehäuse 24 des Injektors 16 ist dabei eine u-förmige Aufnahme 56 für die Hochdruckleitung 20 vorgesehen, die jedoch zu der dem Brennraum abgewandten Außenseite des Injektors 16 hin offen ist. Die Aufnahme 56 ist als Schlitz in einem kreiszylinderförmigen Ansatz 58 des Gehäuses 24 des Injektors 16 ausgebildet. An der Innenfläche 60 des Gehäuses 24 am Boden der Aufnahme 56 mündet die zum Kraftstoffeinspritzventil führende Zulaufbohrung 30. Die Mündung der Zulaufbohrung 30 an der Innenfläche 60 ist von einem sich zumindest annähernd konisch verjüngenden Kragen 62 umgeben. Der nach außen weisende Endbereich des Ansatzes 58 ist mit einem Außengewinde 64 versehen.In the FIGS. 2 and 3 the connection of the high pressure line 20 is shown with the injector 16 according to a first embodiment. On the housing 24 of the injector 16 while a U-shaped receptacle 56 is provided for the high-pressure line 20, which is, however, open to the outside of the injector 16 facing away from the combustion chamber. The receptacle 56 is formed as a slot in a circular cylindrical projection 58 of the housing 24 of the injector 16. On the inner surface 60 of the housing 24 at the bottom of the receptacle 56 leads to the fuel injection valve leading inlet bore 30. The mouth of the inlet bore 30 on the inner surface 60 of surrounded by an at least approximately conically tapered collar 62. The outwardly facing end portion of the lug 58 is provided with an external thread 64.

Die Öffnung 22 in der Hochdruckleitung 20 ist derart ausgebildet, dass diese sich nach außen zumindest annähernd konisch erweitert. Die Hochdruckleitung 20 ist von außen in die Aufnahme 56 eingefügt, wobei deren Öffnung 22 auf den die Zulaufbohrung 30 des Injektors 16 umgebenden Kragen 62 aufgesetzt ist. Die Hochdruckleitung 20 wird in der Aufnahme 56 durch ein Spannelement 66 gehalten, das als eine auf das Außengewinde 64 des Ansatzes 58 aufgeschraubte Spannmutter ausgebildet ist, die zumindest mittelbar auf die Hochdruckleitung 20 wirkt. Zwischen der Spannmutter 66 und der Hochdruckleitung 20 ist ein Stützelement 68 angeordnet, das einerseits an die Oberfläche der Hochdruckleitung 20 angepasst eine konkave Vertiefung aufweist und das eine Drehbewegung der Spannmutter 66 bezüglich der Hochdruckleitung 20 ermöglicht. Beim Aufschrauben der Spannmutter 66 auf das Außengewinde des Ansatzes 58 wird über das Stützelement 68 die Hochdruckleitung 20 in die Aufnahme 56 gepresst, wobei durch die konische Ausbildung des Kragens 62 und der Öffnung 22 eine Abdichtung des Übergangs von der Hochdruckleitung 20 zur Zulaufbohrung 30 sichergestellt wird.The opening 22 in the high pressure line 20 is formed such that it widens outwards at least approximately conically. The high pressure line 20 is inserted from the outside into the receptacle 56, wherein the opening 22 is placed on the surrounding the inlet bore 30 of the injector 16 collar 62. The high pressure line 20 is held in the receptacle 56 by a clamping element 66 which is formed as a screwed onto the external thread 64 of the lug 58 clamping nut, which acts at least indirectly on the high pressure line 20. Between the clamping nut 66 and the high pressure line 20, a support member 68 is arranged, which on the one hand adapted to the surface of the high pressure line 20 has a concave depression and which allows a rotational movement of the clamping nut 66 with respect to the high pressure line 20. When screwing the clamping nut 66 on the external thread of the projection 58, the high pressure line 20 is pressed into the receptacle 56 via the support member 68, wherein the conical design of the collar 62 and the opening 22 a seal the transition from the high pressure line 20 is ensured to the inlet bore 30 ,

Wie in den Figuren 2 und 3 dargestellt kann in der Hochdruckleitung 20 im Bereich von deren Verbindung mit dem Injektor 16 ein Einsatz 70 angeordnet sein, in dem wenigstens eine, einen definierten Durchflussquerschnitt bestimmende Drosselstelle gebildet ist. Durch den Einsatz 70 wird außerdem eine Versteifung der Hochdruckleitung 20 in deren Verbindungsbereich mit dem Injektor 16 erreicht. Es kann dabei vorgesehen sein, dass eine Drosselstelle 72 in der Verbindung der Hochdruckleitung 20 mit der Zulaufbohrung 30 des Injektors 16 angeordnet ist. Alternativ oder zusätzlich kann auch vorgesehen sein, dass wenigstens eine Drosselstelle 74 im Durchgang durch die Hochdruckleitung 20 angeordnet ist, was insbesondere zweckmäßig ist, wenn durch die Hochdruckleitung 20 mehrere Injektoren 16 miteinander verbunden werden. Es kann vorgesehen sein, dass im Einsatz 70 sowohl vor als auch nach der Öffnung 22 jeweils eine Drosselstelle 74 angeordnet ist. Durch die Drosselstellen 72,74 kann die Ausbreitung von Druckwellen in der Hochdruckleitung 20 und zwischen dem Injektor 16 und der Hochdruckleitung 20 verhindert oder zumindest gedämpft werden. Der Einsatz 70 in der Hochdruckleitung 20 kann auch beim ersten oder zweiten Ausführungsbeispiel vorgesehen sein.As in the FIGS. 2 and 3 represented can be arranged in the high pressure line 20 in the region of the connection to the injector 16, an insert 70, in which at least one, a defined flow cross-section defining throttle point is formed. Through the insert 70 also a stiffening of the high pressure line 20 is achieved in the connection region with the injector 16. It may be provided that a throttle point 72 is arranged in the connection of the high-pressure line 20 with the inlet bore 30 of the injector 16. Alternatively or In addition, it can also be provided that at least one throttle point 74 is arranged in the passage through the high-pressure line 20, which is particularly expedient when a plurality of injectors 16 are connected to one another by the high-pressure line 20. It can be provided that a throttling point 74 is arranged in the insert 70 both before and after the opening 22. Through the throttle points 72,74, the propagation of pressure waves in the high pressure line 20 and between the injector 16 and the high pressure line 20 can be prevented or at least damped. The insert 70 in the high pressure line 20 may also be provided in the first or second embodiment.

Bei der Ausführung gemäß den Figuren 2 und 3 ist die Öffnung 22 in der Hochdruckleitung 20 zentrisch zur Längsachse 21 der Hochdruckleitung 20 angeordnet. Bei einer in Figur 7 dargestellten modifizierten Ausführung ist die Öffnung 22 in der Hochdruckleitung 20 exzentrisch zur Längsachse 21 angeordnet. Vorzugsweise ist die Öffnung 22 derart angeordnet, dass sie zumindest annähernd tangential zur Innenwand der Hochdruckleitung 20 verläuft. Durch diese Anordnung der Öffnung 22 kann die Belastbarkeit, insbesondere die Druckbelastbarkeit der Hochdruckleitung 20 gegenüber einer zentrischen Anordnung verbessert sein.In the execution according to the FIGS. 2 and 3 the opening 22 in the high-pressure line 20 is arranged centrically to the longitudinal axis 21 of the high-pressure line 20. In a modified embodiment shown in Figure 7, the opening 22 in the high-pressure line 20 is arranged eccentrically to the longitudinal axis 21. Preferably, the opening 22 is arranged such that it extends at least approximately tangentially to the inner wall of the high-pressure line 20. By this arrangement of the opening 22, the load capacity, in particular the compressive strength of the high-pressure line 20 can be improved compared to a central arrangement.

Claims (5)

  1. Fuel injection device for an internal combustion engine having at least one high pressure line (20), through which fuel is fed to at least one injector (16), the high pressure line (20) having an opening (22) in its circumference for connection to the injector (16), which opening (22) is connected at least indirectly to a feed bore (30) which runs in a housing (24) of the injector (16), the housing (24) of the injector (16) having an outwardly pointing cylindrical extension (58), in which a slot-shaped receptacle (56) is formed, into which the high pressure line (20) is inserted transversely with respect to its longitudinal extent, the receptacle (56) being open on the side which lies opposite the orifice of the feed bore (30), and it being possible for the high pressure line (20) to be fixed in the receptacle (56) by means of a clamping element (66) which is fastened to the housing (24) of the injector (16), in such a way that the transition from the opening (22) of the high pressure line (20) to the orifice of the feed bore (30) in the receptacle (56) is sealed, characterized in that the clamping element is configured as a clamping nut (66) which is screwed onto the external thread (64) of the extension (58) and acts at least indirectly on the high pressure line (20), and in that the housing (24) of the injector (16) forms a collar (62) which surrounds the orifice of the feed bore (30) and onto which the high pressure line (20) is placed with its opening (22).
  2. Fuel injection device according to Claim 1, characterized in that a supporting element (68) is arranged between the clamping nut (66) and the high pressure line (20), which supporting element (68) is adapted on its side which faces the high pressure line (20) to the shape of the high pressure line (20) and with respect to which the clamping nut (66) can be rotated.
  3. Fuel injection device according to Claim 1, characterized in that the collar (62) of the housing (24) of the injector (16) and the opening (22) of the high pressure line (20) are in each case of at least approximately conical configuration.
  4. Fuel injection device according to one of the preceding claims, characterized in that the opening (22) in the high pressure line (20) is arranged eccentrically with respect to the longitudinal axis (21) of the high pressure line (20), in particular in such a way that the opening (22) opens into the high pressure line (20) at least approximately tangentially with respect to the inner wall of the said high pressure line (20).
  5. Fuel injection device according to one of the preceding claims, characterized in that an insert (70) is provided in the high pressure line (20) in the region of its connection to the injector (16), in which insert (70) at least one throttle point (72, 74) is configured in order to form a defined throughflow cross section through the high pressure line (20) and/or to the feed bore (30) of the injector (16).
EP07704539.1A 2006-03-30 2007-02-13 Line connection of a fuel injection device for an internal combustion engine Not-in-force EP2004985B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610014771 DE102006014771A1 (en) 2006-03-30 2006-03-30 Fuel injection device for an internal combustion engine
PCT/EP2007/051363 WO2007113036A1 (en) 2006-03-30 2007-02-13 Line connection of a fuel injection device for an internal combustion engine

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Publication Number Publication Date
EP2004985A1 EP2004985A1 (en) 2008-12-24
EP2004985B1 true EP2004985B1 (en) 2015-04-08

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EP07704539.1A Not-in-force EP2004985B1 (en) 2006-03-30 2007-02-13 Line connection of a fuel injection device for an internal combustion engine

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EP (1) EP2004985B1 (en)
DE (1) DE102006014771A1 (en)
WO (1) WO2007113036A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102006033927A1 (en) * 2006-07-21 2008-01-24 Robert Bosch Gmbh fuel injector

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DE1260704B (en) 1962-01-18 1968-02-08 Foseco Trading Ag Release agent for foundry pattern equipment
DE4307650C2 (en) * 1993-03-11 1996-02-29 Hatz Motoren High pressure line connection
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WO2007113036A1 (en) 2007-10-11
EP2004985A1 (en) 2008-12-24
DE102006014771A1 (en) 2007-10-11

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