EP2664781B1 - Fuel injector nozzle - Google Patents

Fuel injector nozzle Download PDF

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Publication number
EP2664781B1
EP2664781B1 EP13166441.9A EP13166441A EP2664781B1 EP 2664781 B1 EP2664781 B1 EP 2664781B1 EP 13166441 A EP13166441 A EP 13166441A EP 2664781 B1 EP2664781 B1 EP 2664781B1
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EP
European Patent Office
Prior art keywords
cylinder head
recess
injection nozzle
fuel injection
fuel injector
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Application number
EP13166441.9A
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German (de)
French (fr)
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EP2664781A1 (en
Inventor
Stefan Kern
Tom Reichardt
Thomas Atzkern
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MAN Energy Solutions SE
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MAN Diesel and Turbo SE
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Publication of EP2664781A1 publication Critical patent/EP2664781A1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/852—Mounting of fuel injection apparatus provisions for mounting the fuel injection apparatus in a certain orientation, e.g. markings or notches

Definitions

  • the invention relates to a fuel injection nozzle of an internal combustion engine. Furthermore, the invention relates to a cylinder head of an internal combustion engine for receiving at least one such fuel injector, a mounting bush for mounting a fuel injector on a cylinder head and an arrangement of the cylinder head and at least one fuel injector and optionally at least one mounting bushing.
  • the centering device has a sleeve-like base body with a recess into which a portion of the fuel injector and a portion of the nozzle carrier can be inserted, wherein the recess of the sleeve-like base body is defined by an inner contour, which allows a centering of the fuel injection nozzle on the nozzle carrier at least in a defined relative position.
  • the inner contour of the sleeve-like base body of the centering device, which defines the recess for receiving the fuel injection nozzle and the nozzle carrier is according to the DE 10 2010 039 980 A1 formed polygonal and / or axisymmetric.
  • the invention is based on the object to provide a novel fuel injector, a novel cylinder head, a novel mounting bushing and an arrangement at least from the cylinder head and at least one fuel injector.
  • the fuel injection nozzle according to the invention can be mounted on a cylinder head of the internal combustion engine, that the fuel injector with a portion thereof in a recess in the cylinder head either directly or indirectly with the interposition of a mounting bush insertable and locked in this inserted position via a locking device on the cylinder head, wherein the portion of Fuel injection nozzle, via which the same is inserted directly or indirectly into the recess in the cylinder head, an outer contour which allows mounting of the fuel injector on the cylinder head only in a defined relative position.
  • the invention thus reduces sources of error and the time involved in mounting a fuel injector on a cylinder head of an internal combustion engine.
  • Another advantage of the invention is that a risk of damage to the fuel injector during assembly of the same can be avoided on the cylinder head.
  • a recess of the fuel injector into which the locking device for locking the fuel injector to the cylinder head is inserted is always aligned correctly with the locking device, so there is no danger that the locking device in a wrong relative position to an outer contour the fuel injector hits, damaging the fuel injector during assembly.
  • the outer contour of the portion of the fuel injection nozzle, via which it is directly or indirectly inserted into the recess in the cylinder head polygonal and axially symmetrical.
  • the polygonal and axisymmetric contouring of the outer contour of the portion of the fuel injection nozzle, via which the same is inserted directly or indirectly into the recess in the cylinder head, is particularly preferred in terms of manufacturing technology. This can easily be ensured that the fuel injector can be mounted only in a defined relative position on the cylinder head.
  • the invention relates to a cylinder head for receiving at least one such fuel injector according to claim 6, a mounting bushing for mounting a fuel injector on a cylinder head according to claim 11 and an arrangement at least from the cylinder head and at least one fuel injector according to claim 12.
  • the present invention relates to a fuel injector of an internal combustion engine, a cylinder head for receiving at least one fuel injector and an optional mounting bushing for mounting the fuel injector on the cylinder head. Furthermore, the invention relates to an arrangement at least from the cylinder head and at least one fuel injector.
  • Fig. 1 shows a highly schematic exploded view of an arrangement of a fuel injector 1, a cylinder head 2 and a mounting sleeve 3, which can be positioned in the indirect assembly of the fuel injector 1 in a recess 4 of the cylinder head 2 between the cylinder head 2 and the fuel injector 1.
  • This mounting bushing 3 is an optional assembly.
  • Fig. 1 In contrast to the illustrated embodiment of Fig. 1 is also a variant of the invention conceivable in which is dispensed with the mounting bushing 3, in which therefore the fuel injector 1 directly in the recess 4 of the cylinder head 2 is receiving.
  • the fuel injection nozzle 1 has a section 5, via which the fuel injector 1 can be inserted either directly into the recess 4 of the cylinder head 2 or indirectly with interposition of the mounting bushing 3, wherein the fuel injector 1 in this inserted into the cylinder head 2 position via a locking device. 6 can be locked, which is for this purpose in a recess 7 in the cylinder head 2 and in a corresponding recess 8 in the fuel injector 1 inserted.
  • the locking device 6 also penetrates a corresponding recess 9 of the mounting bushing 3.
  • the section 5 of the fuel injector 1, via which the same is inserted into the recess 4 in the cylinder head 2, has an outer contour 10, the assembly of the fuel injector 1 on the cylinder head 2 exclusively in a defined relative position, namely in a defined axial angular position of the fuel injector. 1 to the cylinder head 2, allows.
  • the recess 4 of the cylinder head 2 has an adapted to an outer contour 11 of the mounting sleeve 3 inner contour 12, wherein further the mounting bushing 3 at a recess 13 of the same, which serves to receive the fuel injector 1, an adapted to the outer contour 10 of the fuel injector 1 inner contour 14 has.
  • the interaction of the inner contour 12 of the recess 4 of the cylinder head 2 with the outer contour 11 of the mounting bush 3 ensures that the mounting bushing 3 can be introduced exclusively in a defined relative position in the recess 4 of the cylinder head 2.
  • the interaction of the inner contour 14 of the mounting bushing 3 with the outer contour 10 of the fuel injector 1 ensures that the fuel injector 1 exclusively in a defined relative position in the mounting bushing 3 and thus only in a defined relative position in the cylinder head 2, namely the recess 4 thereof, are introduced can.
  • the mounting bush 3 is an optional assembly, so that in contrast to the embodiment shown, the fuel injector 1 can also be inserted directly into the recess 4 in the cylinder head 2.
  • the outer contour 10 of the fuel injector 1 then interacts directly with the inner contour 12 of the recess 4 of the cylinder head 2 in such a way that the fuel injector 1 can be mounted on the cylinder head 2 exclusively in a defined relative position, ie in an axial angular position.
  • Fig. 1 can be removed, in the embodiment shown both at the portion 5 of the fuel injector 1 and the mounting bushing 3 and the recess 4 of the cylinder head 2 paragraphs 15, 16 and 17 are formed which the insertion depth of the mounting bushing 3 in the recess 4 of the cylinder head 2 and the fuel injector 5 in the mounting bushing 3 limit.
  • the inner contours 12, 14 and the outer contours 10, 11 are each polygonal and axisymmetric.
  • manufacturing technology can be ensured in a particularly simple manner that the fuel injection nozzle 1 can be mounted exclusively in a defined relative position on the cylinder head 2.
  • the axisymmetric, polygonal contouring of the inner contours 12, 14 and the outer contours 10, 11 is preferably such that at least one of preferably three corner regions of the respective polygonal profile of the respective inner contour 12, 14 and outer contour 10, 11 a respect to the other corner regions deviating radius is formed, so that, as already stated, the fuel injector 1 can be mounted on the cylinder head 2 optionally with the interposition of the mounting sleeve 3 exclusively in a defined axial angular position.
  • the respective cooperating inner contours 12, 14 and outer contours 10, 11 form a kind of polygonal shaft-hub connection.
  • the present invention further relates to the cylinder head 2 for receiving at least one such fuel injector 1 and the optional mounting sleeve 3, which is positioned in the indirect mounting of a fuel injector 1 on the cylinder head 2 between the cylinder head 2 and the fuel injector 1.
  • the cylinder head 2 and the mounting bushing 3 has already been discussed above.
  • the invention relates to an arrangement of the cylinder head 2 and at least one fuel injector 1, wherein between the cylinder head 2 and the or each fuel injector 1 each an optional mounting sleeve 3 can be positioned.

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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

Die Erfindung betrifft eine Kraftstoffeinspritzdüse einer Brennkraftmaschine. Des Weiteren betrifft die Erfindung einen Zylinderkopf einer Brennkraftmaschine zur Aufnahme mindestens einer solchen Kraftstoffeinspritzdüse, eine Montagebuchse zur Montage einer Kraftstoffeinspritzdüse an einem Zylinderkopf und eine Anordnung aus dem Zylinderkopf und zumindest einer Kraftstoffeinspritzdüse und gegebenenfalls mindestens einer Montagebuchse.The invention relates to a fuel injection nozzle of an internal combustion engine. Furthermore, the invention relates to a cylinder head of an internal combustion engine for receiving at least one such fuel injector, a mounting bush for mounting a fuel injector on a cylinder head and an arrangement of the cylinder head and at least one fuel injector and optionally at least one mounting bushing.

Aus der DE 10 2010 039 980 A1 ist es bekannt, eine Kraftstoffeinspritzdüse an einem Düsenträger eines Zylinders einer Brennkraftmaschine mithilfe einer Zentriervorrichtung zu zentrieren, wobei nach diesem Stand der Technik vorgeschlagen wird, dass die Zentriervorrichtung einen hülsenartigen Grundkörper mit einer Ausnehmung aufweist, in welche ein Abschnitt der Kraftstoffeinspritzdüse sowie ein Abschnitt des Düsenträgers einführbar sind, wobei die Ausnehmung des hülsenartigen Grundkörpers von einer Innenkontur definiert ist, der eine Zentrierung der Kraftstoffeinspritzdüse am Düsenträger mindestens in einer definierten Relativposition zulässt. Die Innenkontur des hülsenartigen Grundkörpers der Zentriervorrichtung, welche die Ausnehmung zur Aufnahme der Kraftstoffeinspritzdüse und des Düsenträgers definiert, ist nach der DE 10 2010 039 980 A1 polygonartig und/oder achssymmetrisch ausgebildet.From the DE 10 2010 039 980 A1 It is known to center a fuel injector on a nozzle carrier of a cylinder of an internal combustion engine by means of a centering device, wherein according to this prior art it is proposed that the centering device has a sleeve-like base body with a recess into which a portion of the fuel injector and a portion of the nozzle carrier can be inserted, wherein the recess of the sleeve-like base body is defined by an inner contour, which allows a centering of the fuel injection nozzle on the nozzle carrier at least in a defined relative position. The inner contour of the sleeve-like base body of the centering device, which defines the recess for receiving the fuel injection nozzle and the nozzle carrier is according to the DE 10 2010 039 980 A1 formed polygonal and / or axisymmetric.

Hievon ausgehend liegt der Erfindung die Aufgabe zu Grunde, eine neuartige Kraftstoffeinspritzdüse, einen neuartigen Zylinderkopf, eine neuartige Montagebuchse sowie eine Anordnung zumindest aus dem Zylinderkopf und mindestens einer Kraftstoffeinspritzdüse zu schaffen.On this basis, the invention is based on the object to provide a novel fuel injector, a novel cylinder head, a novel mounting bushing and an arrangement at least from the cylinder head and at least one fuel injector.

Diese Aufgabe wird durch eine Kraftstoffeinspritzdüse gemäß Anspruch 1 gelöst.This object is achieved by a fuel injection nozzle according to claim 1.

Die erfindungsgemäße Kraftstoffeinspritzdüse ist an einem Zylinderkopf der Brennkraftmaschine dadurch montierbar, dass die Kraftstoffeinspritzdüse mit einem Abschnitt derselben in eine Ausnehmung im Zylinderkopf entweder unmittelbar oder mittelbar unter Zwischenanordnung einer Montagebuchse einführbar und in dieser eingeführten Position über eine Arretiervorrichtung am Zylinderkopf arretierbar ist, wobei der Abschnitt der Kraftstoffeinspritzdüse, über welchen dieselbe in die Ausnehmung im Zylinderkopf unmittelbar oder mittelbar einführbar ist, eine Außenkontur aufweist, die eine Montage der Kraftstoffeinspritzdüse am Zylinderkopf ausschließlich in einer definierten Relativposition zulässt.The fuel injection nozzle according to the invention can be mounted on a cylinder head of the internal combustion engine, that the fuel injector with a portion thereof in a recess in the cylinder head either directly or indirectly with the interposition of a mounting bush insertable and locked in this inserted position via a locking device on the cylinder head, wherein the portion of Fuel injection nozzle, via which the same is inserted directly or indirectly into the recess in the cylinder head, an outer contour which allows mounting of the fuel injector on the cylinder head only in a defined relative position.

Mit der hier vorliegenden Erfindung ist eine eindeutige Montage einer Kraftstoffeinspritzdüse an einem Zylinderkopf der Brennkraftmaschine ausschließlich in einer definierten Relativposition möglich. Hierdurch kann eine nachträgliche Korrektur der Einbauposition, die nach dem Stand der Technik gegebenenfalls erforderlich sein kann, vermieden werden.With the present invention, a clear assembly of a fuel injector on a cylinder head of the internal combustion engine is possible only in a defined relative position. As a result, a subsequent correction of the installation position, which may be required according to the prior art, be avoided.

Die Erfindung reduziert demnach Fehlerquellen und den Zeitaufwand bei der Montage einer Kraftstoffeinspritzdüse an einem Zylinderkopf einer Brennkraftmaschine.The invention thus reduces sources of error and the time involved in mounting a fuel injector on a cylinder head of an internal combustion engine.

Ein weiterer Vorteil der Erfindung besteht darin, dass eine Beschädigungsgefahr für die Kraftstoffeinspritzdüse bei der Montage derselben am Zylinderkopf vermieden werden kann. So kann durch die Erfindung gewährleistet werden, dass eine Ausnehmung der Kraftstoffeinspritzdüse, in welche die Arretiervorrichtung zur Arretierung der Kraftstoffeinspritzdüse am Zylinderkopf einführbar ist, stets korrekt zur Arretiervorrichtung ausgerichtet ist, sodass keine Gefahr besteht, dass die Arretiervorrichtung in einer falschen Relativposition auf eine äußere Kontur der Kraftstoffeinspritzdüse trifft und so die Kraftstoffeinspritzdüse bei der Montage beschädigt.Another advantage of the invention is that a risk of damage to the fuel injector during assembly of the same can be avoided on the cylinder head. Thus, it can be ensured by the invention that a recess of the fuel injector into which the locking device for locking the fuel injector to the cylinder head is inserted, is always aligned correctly with the locking device, so there is no danger that the locking device in a wrong relative position to an outer contour the fuel injector hits, damaging the fuel injector during assembly.

Erfindungsgemäß ist die Außenkontur des Abschnitts der Kraftstoffeinspritzdüse, über welchen dieselbe in die Ausnehmung im Zylinderkopf unmittelbar oder mittelbar einführbar ist, polygonartig und achssymmetrisch ausgebildet.According to the invention, the outer contour of the portion of the fuel injection nozzle, via which it is directly or indirectly inserted into the recess in the cylinder head, polygonal and axially symmetrical.

Die polygonartige und achssymmetrische Konturierung der Außenkontur des Abschnitts der Kraftstoffeinspritzdüse, über welche dieselbe in die Ausnehmung im Zylinderkopf unmittelbar oder mittelbar einführbar ist, ist fertigungstechnisch besonders bevorzugt. Hierdurch kann einfach gewährleistet werden, dass die Kraftstoffeinspritzdüse ausschließlich in einer definierten Relativposition am Zylinderkopf montiert werden kann.The polygonal and axisymmetric contouring of the outer contour of the portion of the fuel injection nozzle, via which the same is inserted directly or indirectly into the recess in the cylinder head, is particularly preferred in terms of manufacturing technology. This can easily be ensured that the fuel injector can be mounted only in a defined relative position on the cylinder head.

Weiterhin betrifft die Erfindung einen Zylinderkopf zur Aufnahme mindestens einer solchen Kraftstoffeinspritzdüse gemäß Anspruch 6, eine Montagebuchse zur Montage einer Kraftstoffeinspritzdüse an einem Zylinderkopf gemäß Anspruch 11 und eine Anordnung zumindest aus dem Zylinderkopf und mindestens einer Kraftstoffeinspritzdüse gemäß Anspruch 12.Furthermore, the invention relates to a cylinder head for receiving at least one such fuel injector according to claim 6, a mounting bushing for mounting a fuel injector on a cylinder head according to claim 11 and an arrangement at least from the cylinder head and at least one fuel injector according to claim 12.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:

Fig. 1:
eine Anordnung aus einer Kraftstoffeinspritzdüse, einem Zylinderkopf und einer optionalen Montagebuchse in Explosionsdarstellung.
Preferred developments of the invention will become apparent from the following description. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
Fig. 1:
an assembly of a fuel injector, a cylinder head and an optional mounting bush in an exploded view.

Die hier vorliegende Erfindung betrifft eine Kraftstoffeinspritzdüse einer Brennkraftmaschine, einen Zylinderkopf zur Aufnahme mindestens einer Kraftstoffeinspritzdüse sowie eine optionale Montagebuchse zur Montage der Kraftstoffeinspritzdüse an dem Zylinderkopf. Ferner betrifft die Erfindung eine Anordnung zumindest aus dem Zylinderkopf und mindestens einer Kraftstoffeinspritzdüse.The present invention relates to a fuel injector of an internal combustion engine, a cylinder head for receiving at least one fuel injector and an optional mounting bushing for mounting the fuel injector on the cylinder head. Furthermore, the invention relates to an arrangement at least from the cylinder head and at least one fuel injector.

Fig. 1 zeigt eine stark schematisierte Explosionsdarstellung einer Anordnung aus einer Kraftstoffeinspritzdüse 1, einem Zylinderkopf 2 und einer Montagebuchse 3, die bei der mittelbaren Montage der Kraftstoffeinspritzdüse 1 in einer Ausnehmung 4 des Zylinderkopfs 2 zwischen dem Zylinderkopf 2 und der Kraftstoffeinspritzdüse 1 positioniert werden kann. Bei dieser Montagebuchse 3 handelt es sich um eine optionale Baugruppe. Fig. 1 shows a highly schematic exploded view of an arrangement of a fuel injector 1, a cylinder head 2 and a mounting sleeve 3, which can be positioned in the indirect assembly of the fuel injector 1 in a recess 4 of the cylinder head 2 between the cylinder head 2 and the fuel injector 1. This mounting bushing 3 is an optional assembly.

Im Unterschied zum gezeigten Ausführungsbeispiel der Fig. 1 ist auch eine Variante der Erfindung denkbar, in welcher auf die Montagebuchse 3 verzichtet wird, in welcher demnach die Kraftstoffeinspritzdüse 1 unmittelbar in der Ausnehmung 4 des Zylinderkopfs 2 Aufnahme findet.In contrast to the illustrated embodiment of Fig. 1 is also a variant of the invention conceivable in which is dispensed with the mounting bushing 3, in which therefore the fuel injector 1 directly in the recess 4 of the cylinder head 2 is receiving.

Die erfindungsgemäße Kraftstoffeinspritzdüse 1 verfügt über einen Abschnitt 5, über welchen die Kraftstoffeinspritzdüse 1 entweder unmittelbar in die Ausnehmung 4 des Zylinderkopfs 2 oder mittelbar unter Zwischenanordnung der Montagebuchse 3 einführbar ist, wobei die Kraftstoffeinspritzdüse 1 in dieser in den Zylinderkopf 2 eingeführten Position über eine Arretiervorrichtung 6 arretierbar ist, die hierzu in eine Ausnehmung 7 im Zylinderkopf 2 sowie in eine entsprechende Ausnehmung 8 in der Kraftstoffeinspritzdüse 1 einführbar ist.The fuel injection nozzle 1 according to the invention has a section 5, via which the fuel injector 1 can be inserted either directly into the recess 4 of the cylinder head 2 or indirectly with interposition of the mounting bushing 3, wherein the fuel injector 1 in this inserted into the cylinder head 2 position via a locking device. 6 can be locked, which is for this purpose in a recess 7 in the cylinder head 2 and in a corresponding recess 8 in the fuel injector 1 inserted.

In dem Fall, in welchem zwischen der Kraftstoffeinspritzdüse 1 und dem Zylinderkopf 2 die Montagebuchse 3 positioniert ist, durchdringt die Arretiervorrichtung 6 auch eine entsprechende Ausnehmung 9 der Montagebuchse 3.In the case where the mounting bushing 3 is positioned between the fuel injection nozzle 1 and the cylinder head 2, the locking device 6 also penetrates a corresponding recess 9 of the mounting bushing 3.

Der Abschnitt 5 der Kraftstoffeinspritzdüse 1, über welchen dieselbe in die Ausnehmung 4 im Zylinderkopf 2 einführbar ist, weist eine Außenkontur 10 auf, die eine Montage der Kraftstoffeinspritzdüse 1 am Zylinderkopf 2 ausschließlich in einer definierten Relativposition, nämlich in einer definierten axialen Winkellage der Kraftstoffeinspritzdüse 1 zum Zylinderkopf 2, zulässt.The section 5 of the fuel injector 1, via which the same is inserted into the recess 4 in the cylinder head 2, has an outer contour 10, the assembly of the fuel injector 1 on the cylinder head 2 exclusively in a defined relative position, namely in a defined axial angular position of the fuel injector. 1 to the cylinder head 2, allows.

Im gezeigten Ausführungsbeispiel der Fig. 1, in welchem die Kraftstoffeinspritzdüse 1 in die Ausnehmung 4 des Zylinderkopfs 2 mittelbar unter Zwischenanordnung der Montagebuchse 3 einführbar ist, weist die Ausnehmung 4 des Zylinderkopfs 2 eine an eine Außenkontur 11 der Montagebuchse 3 angepasste Innenkontur 12 auf, wobei weiterhin die Montagebuchse 3 an einer Ausnehmung 13 derselben, die der Aufnahme der Kraftstoffeinspritzdüse 1 dient, eine an die Außenkontur 10 der Kraftstoffeinspritzdüse 1 angepasste Innenkontur 14 aufweist.In the illustrated embodiment of the Fig. 1 , in which the fuel injector 1 in the recess 4 of the cylinder head 2 can be inserted indirectly with interposition of the mounting sleeve 3, the recess 4 of the cylinder head 2 has an adapted to an outer contour 11 of the mounting sleeve 3 inner contour 12, wherein further the mounting bushing 3 at a recess 13 of the same, which serves to receive the fuel injector 1, an adapted to the outer contour 10 of the fuel injector 1 inner contour 14 has.

Das Zusammenspiel der Innenkontur 12 der Ausnehmung 4 des Zylinderkopfs 2 mit der Außenkontur 11 der Montagebuchse 3 gewährleistet, dass die Montagebuchse 3 ausschließlich in einer definierten Relativposition in die Ausnehmung 4 des Zylinderkopfs 2 eingeführt werden kann.The interaction of the inner contour 12 of the recess 4 of the cylinder head 2 with the outer contour 11 of the mounting bush 3 ensures that the mounting bushing 3 can be introduced exclusively in a defined relative position in the recess 4 of the cylinder head 2.

Das Zusammenspiel der Innenkontur 14 der Montagebuchse 3 mit der Außenkontur 10 der Kraftstoffeinspritzdüse 1 gewährleistet, dass die Kraftstoffeinspritzdüse 1 ausschließlich in einer definierten Relativposition in die Montagebuchse 3 und damit ausschließlich in einer definierten Relativposition in den Zylinderkopf 2, nämlich die Ausnehmung 4 desselben, eingeführt werden kann.The interaction of the inner contour 14 of the mounting bushing 3 with the outer contour 10 of the fuel injector 1 ensures that the fuel injector 1 exclusively in a defined relative position in the mounting bushing 3 and thus only in a defined relative position in the cylinder head 2, namely the recess 4 thereof, are introduced can.

Wie bereits ausgeführt, handelt es sich bei der Montagebuchse 3 um eine optionale Baugruppe, sodass im Unterschied zum gezeigten Ausführungsbeispiel die Kraftstoffeinspritzdüse 1 auch unmittelbar in die Ausnehmung 4 im Zylinderkopf 2 eingeführt werden kann.As already stated, the mounting bush 3 is an optional assembly, so that in contrast to the embodiment shown, the fuel injector 1 can also be inserted directly into the recess 4 in the cylinder head 2.

In diesem Fall wirkt dann die Außenkontur 10 der Kraftstoffeinspritzdüse 1 unmittelbar mit der Innenkontur 12 der Ausnehmung 4 des Zylinderkopfs 2 derart zusammen, dass die Kraftstoffeinspritzdüse 1 ausschließlich in einer definierten Relativposition, also in einer axialen Winkellage, am Zylinderkopf 2 montiert werden kann.In this case, the outer contour 10 of the fuel injector 1 then interacts directly with the inner contour 12 of the recess 4 of the cylinder head 2 in such a way that the fuel injector 1 can be mounted on the cylinder head 2 exclusively in a defined relative position, ie in an axial angular position.

Wie Fig. 1 entnommen werden kann, sind im gezeigten Ausführungsbeispiel sowohl an dem Abschnitt 5 der Kraftstoffeinspritzdüse 1 als auch an der Montagebuchse 3 und der Ausnehmung 4 des Zylinderkopfs 2 Absätze 15, 16 bzw. 17 ausgebildet, welche die Einführtiefe der Montagebuchse 3 in die Ausnehmung 4 des Zylinderkopfs 2 sowie der Kraftstoffeinspritzdüse 5 in die Montagebuchse 3 begrenzen.As Fig. 1 can be removed, in the embodiment shown both at the portion 5 of the fuel injector 1 and the mounting bushing 3 and the recess 4 of the cylinder head 2 paragraphs 15, 16 and 17 are formed which the insertion depth of the mounting bushing 3 in the recess 4 of the cylinder head 2 and the fuel injector 5 in the mounting bushing 3 limit.

Es ist demnach nicht nur eine eindeutige Relativposition der axialen Winkellage der Komponenten 1, 2 und 3 zueinander gewährleistet ist, vielmehr ist auch eine definierte axiale Einführtiefe derselben gewährleistet, sodass die Ausnehmungen 7, 8 und 9 stets exakt zueinander ausgerichtet sind und die Arretiervorrichtung 6 zur Arretierung der Kraftstoffeinspritzdüse 1 am Zylinderkopf 2 ohne Beschädigungsgefahr für die Kraftstoffeinspritzdüse 1 in die Ausnehmung 8 derselben eingeführt werden kann.It is therefore not only an unambiguous relative position of the axial angular position of the components 1, 2 and 3 is guaranteed to each other, but also a defined axial insertion depth of the same is guaranteed, so that the recesses 7, 8 and 9 are always aligned exactly to each other and the locking device 6 for Locking the fuel injector 1 on the cylinder head 2 can be introduced without risk of damage to the fuel injector 1 in the recess 8 thereof.

Im gezeigten Ausführungsbeispiel sind die Innenkonturen 12, 14 und die Außenkonturen 10, 11 jeweils polygonartig und achssymmetrisch ausgeführt. In diesem Fall kann fertigungstechnisch besonders einfach gewährleistet werden, dass die Kraftstoffeinspritzdüse 1 ausschließlich in einer definierten Relativposition am Zylinderkopf 2 montiert werden kann.In the exemplary embodiment shown, the inner contours 12, 14 and the outer contours 10, 11 are each polygonal and axisymmetric. In this case, manufacturing technology can be ensured in a particularly simple manner that the fuel injection nozzle 1 can be mounted exclusively in a defined relative position on the cylinder head 2.

Die achssymmetrische, polygonale Konturierung der Innenkonturen 12, 14 und der Außenkonturen 10, 11 erfolgt vorzugsweise derart, dass an mindestens einem von vorzugsweise drei Eckbereichen des jeweiligen Polygonprofils der jeweiligen Innenkontur 12, 14 bzw. Außenkontur 10, 11 ein gegenüber den anderen Eckbereichen abweichender Radius ausgebildet ist, sodass, wie bereits ausgeführt, die Kraftstoffeinspritzdüse 1 am Zylinderkopf 2 gegebenenfalls unter Zwischenanordnung der Montagebuchse 3 ausschließlich in einer definierten axialen Winkellage montiert werden kann.The axisymmetric, polygonal contouring of the inner contours 12, 14 and the outer contours 10, 11 is preferably such that at least one of preferably three corner regions of the respective polygonal profile of the respective inner contour 12, 14 and outer contour 10, 11 a respect to the other corner regions deviating radius is formed, so that, as already stated, the fuel injector 1 can be mounted on the cylinder head 2 optionally with the interposition of the mounting sleeve 3 exclusively in a defined axial angular position.

Die jeweils zusammenwirkenden Innenkonturen 12, 14 und Außenkonturen 10, 11 bilden einer Art polygonförmige Welle-Nabe-Verbindung aus.The respective cooperating inner contours 12, 14 and outer contours 10, 11 form a kind of polygonal shaft-hub connection.

Die hier vorliegende Erfindung betrifft weiterhin den Zylinderkopf 2 zur Aufnahme mindestens einer solchen Kraftstoffeinspritzdüse 1 sowie die optionale Montagebuchse 3, die bei der mittelbaren Montage einer Kraftstoffeinspritzdüse 1 am Zylinderkopf 2 zwischen dem Zylinderkopf 2 und der Kraftstoffeinspritzdüse 1 positioniert ist. Auf die Merkmale des Zylinderkopfs 2 sowie der Montagebuchse 3 wurde bereits oben eingegangen.The present invention further relates to the cylinder head 2 for receiving at least one such fuel injector 1 and the optional mounting sleeve 3, which is positioned in the indirect mounting of a fuel injector 1 on the cylinder head 2 between the cylinder head 2 and the fuel injector 1. On the features of the cylinder head 2 and the mounting bushing 3 has already been discussed above.

Ferner betrifft die Erfindung eine Anordnung aus dem Zylinderkopf 2 und mindestens einer Kraftstoffeinspritzdüse 1, wobei zwischen dem Zylinderkopf 2 und der oder jeder Kraftstoffeinspritzdüse 1 jeweils eine optionale Montagebuchse 3 positioniert sein kann.Furthermore, the invention relates to an arrangement of the cylinder head 2 and at least one fuel injector 1, wherein between the cylinder head 2 and the or each fuel injector 1 each an optional mounting sleeve 3 can be positioned.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Kraftstoffeinspritzdüsefuel Injector
22
Zylinderkopfcylinder head
33
Montagebuchsemounting bush
44
Ausnehmungrecess
55
Abschnittsection
66
Arretiervorrichtunglocking device
77
Ausnehmungrecess
88th
Ausnehmungrecess
99
Ausnehmungrecess
1010
Außenkonturouter contour
1111
Außenkonturouter contour
1212
Innenkonturinner contour
1313
Ausnehmungrecess
1414
Innenkonturinner contour
1515
Absatzparagraph
1616
Absatzparagraph
1717
Absatzparagraph

Claims (1)

  1. A fuel injection nozzle (1) of an internal combustion engine, which can be mounted on a cylinder head (2) of the internal combustion engine in that the fuel injection nozzle (1) can be introduced either directly or indirectly with a portion (5) of the same into a recess (4) in the cylinder head (2) subject to the intermediate arrangement of an assembly bush (3) and can be locked on the cylinder head (2) in this introduced position via a locking device (6), wherein the portion (5) of the fuel injection nozzle (1), via which the same can be directly or indirectly introduced into the recess (4) in the cylinder head (2) has an outer contour (10), which permits assembly of the fuel injection nozzle (1) on the cylinder head (2) exclusively in a defined relative position, characterized in that the fuel injection nozzle (1) can either be introduced directly into the recess (4) in the cylinder head (2), wherein the recess (4) of the cylinder head comprises an inner contour (12) adapted to the outer contour (10) of the fuel injection nozzle (1), wherein the outer contour (10) of the portion (5) of the fuel injection nozzle (1), via which the same can be directly or indirectly introduce into the recess (4) in the cylinder head (2), and the inner contour (12) of the respective recess (4) in the cylinder head (2) is designed polygon-like and axially symmetrically, or that the fuel injection nozzle (1) can be directly introduced into the recess (4) in the cylinder head (2) subject to the intermediate arrangement of an assembly bush (3), wherein the recess (4) of the cylinder head (2) has an inner contour (12) that is adapted to an outer contour (11) of the assembly bush (3), and wherein the assembly bush (3) on a recess (13) of the same, which serves for receiving the portion (5) of the fuel injection nozzle (1), has an inner contour (14) adapted to the outer contour (10) of the portion (5) of the fuel injection nozzle (1), wherein both on the portion (5) of the fuel injection nozzle (1) as well as on the assembly bush (3) and the recess (4) of the cylinder head (2) shoulders (15, 16 and 17) respectively are formed, which limit the introduction depth of the assembly bush (3) in the recess (4) of the cylinder head (2) and the fuel injection nozzle (5) in the assembly bush (3) and the inner contours (12, 14) and the outer contours (10, 11) are each embodied polygon-like and axially symmetrically.
EP13166441.9A 2012-05-15 2013-05-03 Fuel injector nozzle Active EP2664781B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012208087.2A DE102012208087B4 (en) 2012-05-15 2012-05-15 Fuel injector

Publications (2)

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EP2664781A1 EP2664781A1 (en) 2013-11-20
EP2664781B1 true EP2664781B1 (en) 2015-10-14

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EP (1) EP2664781B1 (en)
JP (1) JP6165501B2 (en)
KR (1) KR101958492B1 (en)
CN (1) CN103423054B (en)
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DE102015222478A1 (en) * 2015-11-13 2017-05-18 Robert Bosch Gmbh Valve for metering a fluid and arrangement with such a valve

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Publication number Publication date
DE102012208087B4 (en) 2024-03-14
EP2664781A1 (en) 2013-11-20
JP2013238237A (en) 2013-11-28
KR20130127939A (en) 2013-11-25
CN103423054A (en) 2013-12-04
CN103423054B (en) 2017-04-05
JP6165501B2 (en) 2017-07-19
KR101958492B1 (en) 2019-07-04
DE102012208087A1 (en) 2013-11-21

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