EP2664781A1 - Fuel injector nozzle - Google Patents

Fuel injector nozzle Download PDF

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Publication number
EP2664781A1
EP2664781A1 EP20130166441 EP13166441A EP2664781A1 EP 2664781 A1 EP2664781 A1 EP 2664781A1 EP 20130166441 EP20130166441 EP 20130166441 EP 13166441 A EP13166441 A EP 13166441A EP 2664781 A1 EP2664781 A1 EP 2664781A1
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EP
European Patent Office
Prior art keywords
cylinder head
recess
fuel injector
injection nozzle
mounting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20130166441
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German (de)
French (fr)
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EP2664781B1 (en
Inventor
Stefan Kern
Tom Reichardt
Thomas Atzkern
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN Energy Solutions SE
Original Assignee
MAN Diesel and Turbo SE
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Publication date
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Publication of EP2664781A1 publication Critical patent/EP2664781A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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 Monatage 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 required for 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 is inserted on the cylinder head 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 injector over which it is directly or indirectly inserted into the recess in the cylinder head polygonal-shaped, in particular polygonal and axisymmetric.
  • 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 Monatage 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 which is an 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)

Abstract

The injector (1) has a section (5) rotatably and directly or indirectly guided in a recess (14) at a cylindrical head (2) under an intermediate arrangement of a mounting socket (3). The section is locked in an inserted position by a driving device (6) at the cylindrical head, and includes an outer contour (10) that allows an assembly of the injector at the cylindrical head in a defined relative position. The recess includes a polygon-like inner contour (12) that is adapted to the outer contour of the injector. Independent claims are also included for the following: (1) a cylinder head of an internal combustion engine (2) a mounting sleeve for indirect mounting a fuel injector on a cylinder head.

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 Monatage 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 Monatage 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 required for 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 is inserted on the cylinder head 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.

Vorzugsweise ist die Außenkontur des Abschnitts der Kraftstoffeinspritzdüse, über welchen dieselbe in die Ausnehmung im Zylinderkopf unmittelbar oder mittelbar einführbar ist, polygonartig ausgebildet, insbesondere polygonartig und achssymmetrisch. 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.Preferably, the outer contour of the portion of the fuel injector over which it is directly or indirectly inserted into the recess in the cylinder head, polygonal-shaped, in particular polygonal and axisymmetric. 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 Monatage 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 Monatage 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 den Unteransprüchen und 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 embodiments of the invention will become apparent from the dependent claims and the description below. 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 which is an 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 a clear 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, bevorzugten 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 illustrated preferred embodiment, 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. Bezugszeichenliste 1 Kraftstoffeinspritzdüse 2 Zylinderkopf 3 Montagebuchse 4 Ausnehmung 5 Abschnitt 6 Arretiervorrichtung 7 Ausnehmung 8 Ausnehmung 9 Ausnehmung 10 Außenkontur 11 Außenkontur 12 Innenkontur 13 Ausnehmung 14 Innenkontur 15 Absatz 16 Absatz 17 Absatz Further, 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. LIST OF REFERENCE NUMBERS 1 fuel Injector 2 cylinder head 3 mounting bush 4 recess 5 section 6 locking device 7 recess 8th recess 9 recess 10 outer contour 11 outer contour 12 inner contour 13 recess 14 inner contour 15 paragraph 16 paragraph 17 paragraph

Claims (13)

Kraftstoffeinspritzdüse (1) einer Brennkraftmaschine, die an einem Zylinderkopf (2) der Brennkraftmaschine dadurch montierbar ist, dass die Kraftstoffeinspritzdüse (1) mit einem Abschnitt (5) derselben in eine Ausnehmung (4) im Zylinderkopf (2) entweder unmittelbar oder mittelbar unter Zwischenanordnung einer Montagebuchse (3) einführbar und in dieser eingeführten Position über eine Arretiervorrichtung (6) am Zylinderkopf (2) arretierbar ist, wobei der Abschnitt (5) der Kraftstoffeinspritzdüse (1), über welchen dieselbe in die Ausnehmung (4) im Zylinderkopf (2) unmittelbar oder mittelbar einführbar ist, eine Außenkontur (10) aufweist, die eine Montage der Kraftstoffeinspritzdüse (1) am Zylinderkopf (2) ausschließlich in einer definierten Relativposition zulässt.Fuel injection nozzle (1) of an internal combustion engine, which is mountable on a cylinder head (2) of the internal combustion engine, that the fuel injection nozzle (1) with a portion (5) thereof in a recess (4) in the cylinder head (2) either directly or indirectly with intermediate arrangement a mounting bushing (3) insertable and in this inserted position via a locking device (6) on the cylinder head (2) is lockable, wherein the portion (5) of the fuel injector (1), via which the same in the recess (4) in the cylinder head (2 ) is inserted directly or indirectly, an outer contour (10), which allows mounting of the fuel injector (1) on the cylinder head (2) only in a defined relative position. Kraftstoffeinspritzdüse nach Anspruch 1, dadurch gekennzeichnet, dass die Kraftstoffeinspritzdüse (1) in die Ausnehmung (4) im Zylinderkopf (2) unmittelbar einführbar ist, wobei die Ausnehmung (4) des Zylinderkopfs (2) eine an die Außenkontur (10) der Kraftstoffeinspritzdüse (1) angepasste Innenkontur (12) aufweist.Fuel injection nozzle according to claim 1, characterized in that the fuel injection nozzle (1) in the recess (4) in the cylinder head (2) is directly insertable, wherein the recess (4) of the cylinder head (2) to the outer contour (10) of the fuel injector ( 1) has adapted inner contour (12). Kraftstoffeinspritzdüse nach Anspruch 1, dadurch gekennzeichnet, dass die Kraftstoffeinspritzdüse (1) in die Ausnehmung (4) im Zylinderkopf (2) mittelbar unter Zwischenanordnung der Montagebuchse (3) einführbar ist, wobei die Ausnehmung (4) des Zylinderkopfs (2) eine an eine Außenkontur (11) der Montagebuchse (3) angepasste Innenkontur (12) aufweist, und wobei die Montagebuchse (3) an einer Ausnehmung (13) derselben, die der Aufnahme des Abschnitts (5) der Kraftstoffeinspritzdüse (1) dient, eine an die Außenkontur (10) des Abschnitts (5) der Kraftstoffeinspritzdüse (1) angepasste Innenkontur (14) aufweist.Fuel injection nozzle according to claim 1, characterized in that the fuel injection nozzle (1) in the recess (4) in the cylinder head (2) indirectly with interposition of the mounting bush (3) is insertable, wherein the recess (4) of the cylinder head (2) one to a Outer contour (11) of the mounting bush (3) adapted inner contour (12), and wherein the mounting bush (3) on a recess (13) thereof, which serves to receive the portion (5) of the fuel injector (1), one to the outer contour (10) of the section (5) of the fuel injection nozzle (1) adapted inner contour (14). Kraftstoffeinspritzdüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Außenkontur (10) des Abschnitts (5) der Kraftstoffeinspritzdüse (1), über welchen dieselbe in die Ausnehmung (4) im Zylinderkopf (2) unmittelbar oder mittelbar einführbar ist, polygonartig ausgebildet ist.Fuel injection nozzle according to one of claims 1 to 3, characterized in that the outer contour (10) of the portion (5) of the fuel injection nozzle (1), via which the same in the recess (4) in the cylinder head (2) is directly or indirectly inserted, polygonal is trained. Kraftstoffeinspritzdüse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Außenkontur (10) des Abschnitts (5) der Kraftstoffeinspritzdüse (1), über welchen dieselbe in die Ausnehmung (4) im Zylinderkopf (2) unmittelbar oder mittelbar einführbar ist, achssymmetrisch ausgebildet ist.Fuel injection nozzle according to one of claims 1 to 4, characterized in that the outer contour (10) of the portion (5) of the fuel injection nozzle (1), via which the same in the recess (4) in the cylinder head (2) is inserted directly or indirectly, axially symmetrical is trained. Zylinderkopf (2) einer Brennkraftmaschine, an dem mindestens eine Kraftstoffeinspritzdüse (1) dadurch montierbar ist, dass die jeweilige Kraftstoffeinspritzdüse mit einem Abschnitt (5) derselben in eine Ausnehmung (4) im Zylinderkopf (2) entweder unmittelbar oder mittelbar unter Zwischenanordnung einer Montagebuchse (3) einführbar und in dieser eingeführten Position über eine Arretiervorrichtung (6) am Zylinderkopf (2) arretierbar ist, wobei die oder jede Ausnehmung (4) im Zylinderkopf (2), die der unmittelbaren oder mittelbaren Aufnahme einer Kraftstoffeinspritzdüse (1) dient, eine Innenkontur (12) aufweist, die eine Montage der jeweiligen Kraftstoffeinspritzdüse (1) am Zylinderkopf (2) ausschließlich in einer definierten Relativposition zulässt.Cylinder head (2) of an internal combustion engine to which at least one fuel injector (1) can be mounted by the respective fuel injector with a portion (5) thereof in a recess (4) in the cylinder head (2) either directly or indirectly with the interposition of a mounting bushing ( 3) is insertable and in this inserted position via a locking device (6) on the cylinder head (2) can be locked, wherein the or each recess (4) in the cylinder head (2), which serves the direct or indirect recording of a fuel injector (1), a Inner contour (12), which allows mounting of the respective fuel injector (1) on the cylinder head (2) only in a defined relative position. Zylinderkopf nach Anspruch 6, dadurch gekennzeichnet, dass in die jeweilige Ausnehmung (4) eine Kraftstoffeinspritzdüse (1) mittelbar unter Zwischenanordnung einer Montagebuchse (3) einführbar ist, wobei die Innenkontur (12) der Ausnehmung (4) an eine Außenkontur (11) der Montagebuchse (3) angepasst ist, und wobei die Montagebuchse an einer Ausnehmung (13) derselben, die der Aufnahme der Kraftstoffeinspritzdüse dient, eine an die Außenkontur (10) der Kraftstoffeinspritzdüse angepasste Innenkontur (14) aufweist.Cylinder head according to claim 6, characterized in that in the respective recess (4) a fuel injector (1) indirectly with interposition of a mounting bushing (3) is insertable, wherein the inner contour (12) of the recess (4) to an outer contour (11) of Mounting bush (3) is adapted, and wherein the mounting bushing at a recess (13) thereof, which serves to receive the fuel injector, an adapted to the outer contour (10) of the fuel injector inner contour (14). Zylinderkopf nach Anspruch 6, dadurch gekennzeichnet, dass in die jeweilige Ausnehmung (4) eine Kraftstoffeinspritzdüse unmittelbar einführbar ist, wobei die Innenkontur (12) der Ausnehmung (4) an eine Außenkontur (10) der Kraftstoffeinspritzdüse angepasst ist.Cylinder head according to claim 6, characterized in that in the respective recess (4) a fuel injector is directly insertable, wherein the inner contour (12) of the recess (4) is adapted to an outer contour (10) of the fuel injector. Zylinderkopf nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass die Innenkontur (12) der jeweiligen Ausnehmung (4) im Zylinderkopf (2) polygonartig ausgebildet ist.Cylinder head according to one of claims 6 to 8, characterized in that the inner contour (12) of the respective recess (4) in the cylinder head (2) is polygonal-shaped. Zylinderkopf nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass die Innenkontur (12) der jeweiligen Ausnehmung (4) im Zylinderkopf (2) achssymmetrisch ausgebildet ist.Cylinder head according to one of claims 6 to 9, characterized in that the inner contour (12) of the respective recess (4) in the cylinder head (2) is formed axisymmetric. Montagebuchse (3) zur mittelbaren Monatage einer Kraftstoffeinspritzdüse (1) an einem Zylinderkopf (2), mit einer Außenkontur (11), die an eine Innenkontur (12) einer Ausnehmung (4) des Zylinderkopfs (2), die der Aufnahme der Monatagebuchse (1) dient, angepasst ist, und mit einer Ausnehmung (13), die der Aufnahme der Kraftstoffeinspritzdüse (1) dient, wobei eine Innenkontur (14) der Ausnehmung (13) an eine Außenkontur (10) der Kraftstoffeinspritzdüse (1) angepasst ist.Mounting bushing (3) for the indirect mounting of a fuel injection nozzle (1) on a cylinder head (2), with an outer contour (11) to an inner contour (12) of a recess (4) of the cylinder head (2), the recording of Monatagebuchse ( 1), is adapted, and with a recess (13) which serves to receive the fuel injector (1), wherein an inner contour (14) of the recess (13) is adapted to an outer contour (10) of the fuel injector (1). Anordnung aus dem Zylinderkopf nach einem der Ansprüche 6 bis 10 und mindestens einer Kraftstoffeinspritzdüse nach einem der Ansprüche 1 bis 5.Arrangement of the cylinder head according to one of claims 6 to 10 and at least one fuel injection nozzle according to one of claims 1 to 5. Anordnung nach Anspruch 12, gekennzeichnet durch mindestens eine Montagebuchse nach Anspruch 11.Arrangement according to claim 12, characterized by at least one mounting bush according to claim 11.
EP13166441.9A 2012-05-15 2013-05-03 Fuel injector nozzle Active EP2664781B1 (en)

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DE102012208087.2A DE102012208087B4 (en) 2012-05-15 2012-05-15 Fuel injector

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Also Published As

Publication number Publication date
EP2664781B1 (en) 2015-10-14
CN103423054B (en) 2017-04-05
KR101958492B1 (en) 2019-07-04
CN103423054A (en) 2013-12-04
KR20130127939A (en) 2013-11-25
DE102012208087A1 (en) 2013-11-21
JP6165501B2 (en) 2017-07-19
JP2013238237A (en) 2013-11-28
DE102012208087B4 (en) 2024-03-14

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