EP1706626A2 - Supporting element - Google Patents

Supporting element

Info

Publication number
EP1706626A2
EP1706626A2 EP04817133A EP04817133A EP1706626A2 EP 1706626 A2 EP1706626 A2 EP 1706626A2 EP 04817133 A EP04817133 A EP 04817133A EP 04817133 A EP04817133 A EP 04817133A EP 1706626 A2 EP1706626 A2 EP 1706626A2
Authority
EP
European Patent Office
Prior art keywords
support element
element according
tabs
fuel
injection valve
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
EP04817133A
Other languages
German (de)
French (fr)
Other versions
EP1706626B1 (en
Inventor
Martin Scheffel
Werner Berger
Anh-Tuan Hoang
Jens Pohlmann
Martin BÜHNER
Thomas FRÖHNER
Cedric Olivier
Martin Andorfer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1706626A2 publication Critical patent/EP1706626A2/en
Application granted granted Critical
Publication of EP1706626B1 publication Critical patent/EP1706626B1/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws
    • 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
    • F02M2200/853—Mounting of fuel injection apparatus involving use of quick-acting mechanism, e.g. clips
    • 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
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa

Definitions

  • the invention is based on a support element for spacing a fuel distributor line from a fuel injection valve used in a cylinder head of an internal combustion engine according to the preamble of the main claim.
  • a disadvantage of the fastening device known from DE 29 26 490 AI is, in particular, the bracing effect of the various mounting parts on the fuel injector.
  • the force flow generated in the fuel injector leads to deformations and thus to changes in the stroke of the valve needle until jamming and to a pressure or bending load on the housing parts, which are generally thin-walled and welded to one another at several points.
  • each fastening measure leads, for example, to an increase in the radial expansion of the fuel injection valve, and thus to an increased space requirement during installation, due to a support collar.
  • the support element according to the invention for a fuel injection valve with the characterizing features of the main claim has the advantage that the fuel distributor line is supported on the fuel injection valve without radial force via the support element according to the invention, and thus tension and subsequent damage to the fuel injection valve and the connection of the fuel distribution line are eliminated.
  • the support element ensures, through appropriately designed brackets and tabs, both a transfer of the hold-down force of the fuel rail to the fuel injector and a flexible fixation to compensate for tolerances and offsets.
  • the support element can be produced in a simple manner by stamping from sheet metal.
  • Punched-out recesses advantageously ensure a secure fixation of the support element on the fuel injection valve and simple support of the fuel distributor line while being easy to manufacture.
  • Different lug shapes can advantageously be designed in such a way that a more or less strong elastic and plastic deformation enables a support between the fuel distributor line and the fuel injection valve that is optimized depending on the installation situation.
  • FIG. 1A-D show various schematic views of a first exemplary embodiment of a support element designed according to the invention for a fuel injector
  • Fig. 2 is a schematic perspective view of a second embodiment of a support element designed according to the invention.
  • Fig. 3 is a schematic perspective view of a third embodiment of a support element designed according to the invention. Description of the design examples
  • FIGS. 1A to 1D show different schematic views of a first exemplary embodiment of a support element 3 designed according to the invention for fixing a fuel injection valve 1 in a cylinder head 12 of an internal combustion engine and for connecting the fuel injection valve 1 to a fuel distributor line 2.
  • FIG. 1A shows a schematic, partially sectioned perspective view of the
  • the fuel injection valve 1 is designed in the form of a direct injection fuel injection valve 1, which can be used for the direct injection of fuel into a combustion chamber of a spark-ignition internal combustion engine, which is not shown in any more detail, in particular a mixture-compression-ignition engine, in a valve receptacle of the cylinder head 12.
  • the valve seat can also be provided on a seat of a suction pipe, not shown.
  • the fuel injection valve 1 has, on an inlet-side end 4, a plug connection to a receiving connector of a fuel distributor line 2, which is sealed by a seal 5 between the fuel distributor line 2 and a supply connector 6 of the fuel injector 1.
  • the fuel injector 1 has an electrical connection 7 for the electrical contacting for actuating the fuel injector 1.
  • the support element 3 is provided according to the invention.
  • the support element 3 consists of a bracket 8, which is on the one hand on a shoulder 9 of the fuel injector 1 and on the other hand Shoulder 10 of the fuel rail 2 is supported.
  • the clamp 8 is slotted in the area of the electrical connection 7 of the fuel injection valve 1 in order to facilitate assembly.
  • FIG. 1B shows how the clamp 8 is placed on the fuel injection valve 1 and is supported on the shoulder 9.
  • brackets 11 and two brackets 18 are connected to the bracket 8, as can be seen in particular in FIG. 1D, and provide a resilient bracing of the fuel distributor line 2 against the fuel injector 1.
  • the brackets 11 are for a radial clamping action and the bracket 18 responsible for the axial elasticity.
  • the tabs 11 are supported on the shoulder 9 of the fuel injector 1, while the brackets 18 rest on the shoulder 10 of the fuel rail 2.
  • the bracket 18 are due to their shape and their approach to the bracket 8 so that they can be plastically and elastically deformed under axial load and thereby introduce an axial force into the fuel injector 1.
  • IC shows a top view of the first exemplary embodiment of the support element 3 designed according to the invention in the position mounted on the fuel injection valve 1.
  • the support element 3 on the one hand not round, but in a roughly rectangular or square cross-sectional shape, whereby additional edges 16, which form the end of the clamp 8 on both sides of a slit 15, are folded radially inward in the direction of the fuel injector 1. It is thereby achieved that the edges 16 rest over their entire axial length on the fuel injection valve 1 and thereby prevent the support element 3 from slipping.
  • the electrical connection 7 of the fuel injection valve 1 is located in the area of the slot 15.
  • FIGS. 1A-D shows a second exemplary embodiment of a support element 3 designed according to the invention.
  • This has differently shaped tabs 11 which are connected to the bracket 8.
  • two tabs 11b lying opposite one another are tongue-shaped, while a third tab 11a has an approximately onion-like shape.
  • a reverse distribution in the form of two onion-shaped tabs 11a and a tongue-shaped tab 11b is also possible.
  • a recess 17 in the tab 11a ensures a higher elasticity of the tab 11a and thus a greater tolerance to tension.
  • the edges 16 can be configured as in FIGS. 1A-D.
  • FIG. 3 shows a third exemplary embodiment of a support element 3 designed according to the invention.
  • This has tabs 11, which represent a combined shape of the tongue-shaped tabs 11b and the onion-shaped tab 11a of the second exemplary embodiment described above.
  • the shape shown is easier to manufacture, but has a high elasticity and flexibility to balance radial and axial forces.
  • the edges 16 can also be configured as in FIGS. 1A-D.
  • the invention is not limited to the exemplary embodiments shown and can also be used, for example, for fuel injection valves 1 for injection into the combustion chamber of a self-igniting internal combustion engine.
  • the support elements 3 shown in the figures can also be installed in the reverse installation position, so that the brackets 18 are supported on the shoulder 9 of the fuel injection valve 1 instead of on the shoulder 10 of the fuel distributor line 2. All features of the invention can be combined with one another as desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

A supporting element for reciprocally supporting a fuel injection valve (1) in a valve seat, particularly in the valve seat of a cylinder head (12) of a combustion engine and of the fuel injection valve (1) on a fuel distributing line (2) comprises a bracket (8) and tabs (11) and arched elements (18) formed on said bracket.

Description

Stützelement support element
Stand der TechnikState of the art
Die Erfindung geht aus von einem Stützelement zur Beabstandung einer Brennstoffverteilerleitung von einem in einem Zylinderkopf einer Brennkraftmaschine eingesetzten Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs .The invention is based on a support element for spacing a fuel distributor line from a fuel injection valve used in a cylinder head of an internal combustion engine according to the preamble of the main claim.
Es ist bereits aus der DE 29 26 490 AI eine Befestigungsvorrichtung für ein Brennstoffeinspritzventil zur Befestigung an einem Saugrohr bekannt, bei welcher die axiale Fixierung des Brennstoffeinspritzventils an der BrennstoffVerteilerleitung bzw. an einem Stecknippel durch ein Befestigungselement erfolgt, das als U-förmige Sicherungsklammer gestaltet ist, die mit zwei in radialer Richtung federnden Schenkeln versehen ist. Die Sicherungs lammer greift dabei im montierten Zustand durch entsprechende Aussparungen des Stecknippels und ist in eine als Ringnut ausgebildete Ausnehmung in einem Anschlußstutzen des Brennstoffeinspritzventils einrastbar. Das axiale Spiel zwischen den Aussparungen und der Sicherungsklammer sowie zwischen der Ringnut und der Sicherungsklammer soll dabei klein gehalten werden, um eine exakte Fixierung des Brennstoffeinspritzventils ohne Verspannungen der Dichtung zu erreichen. Nachteilig an der aus der DE 29 26 490 AI bekannten Befestigungsvorrichtung ist insbesondere die verspannende Wirkung der verschiedenen Halterungsteile auf das Brennstoffeinspritzventil. Der im Brennstoffeinspritzventil erzeugte Kraftfluß führt zu Verformungen und somit zu Hubänderungen der Ventilnadel bis zum Verklemmen sowie zu einer Druck- ode r Biegebelastung der Gehäuseteile, die im allgemeinen dünnwandig und an mehreren Stellen miteinander verschweißt sind. Zudem führt jede Befestigungsmaßnahme beispielsweise durch einen Auflagebund zu einer Vergrößerung der radialen Ausdehnung des Brennstoffeinspritzventils und damit zu einem erhöhten Platzbedarf beim Einbau.It is already known from DE 29 26 490 AI a fastening device for a fuel injector for fastening to an intake manifold, in which the fuel injector is axially fixed to the fuel distributor line or to a plug nipple by a fastening element which is designed as a U-shaped securing clip , which is provided with two resilient legs in the radial direction. The securing lamb engages in the assembled state through corresponding recesses in the plug nipple and can be latched into a recess in the form of an annular groove in a connecting piece of the fuel injector. The axial play between the cutouts and the securing clip and between the annular groove and the securing clip should be kept small in order to achieve an exact fixation of the fuel injector without tensioning the seal. A disadvantage of the fastening device known from DE 29 26 490 AI is, in particular, the bracing effect of the various mounting parts on the fuel injector. The force flow generated in the fuel injector leads to deformations and thus to changes in the stroke of the valve needle until jamming and to a pressure or bending load on the housing parts, which are generally thin-walled and welded to one another at several points. In addition, each fastening measure leads, for example, to an increase in the radial expansion of the fuel injection valve, and thus to an increased space requirement during installation, due to a support collar.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Stützelement für ein Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß sich die Brennstoffverteilerleitung über das erfindungsgemäße Stützelement radialkraftfrei am Brennstoffeinspritzventil abstützt und somit Verspannungen und nachfolgende Beschädigungen des Brennstoffeinspritzventils und des Anschlusses der Brennstoffverteilerleitung entfallen. Das Stützelement sorgt durch entsprechend ausgestaltete Bügel und Laschen sowohl für einen Übertrag der Niederhaltekraft der Brennstoffverteilerleitung auf das Brennstoffeinspritzventil als auch für eine Toleranzen und Versätze ausgleichende flexible Fixierung.The support element according to the invention for a fuel injection valve with the characterizing features of the main claim has the advantage that the fuel distributor line is supported on the fuel injection valve without radial force via the support element according to the invention, and thus tension and subsequent damage to the fuel injection valve and the connection of the fuel distribution line are eliminated. The support element ensures, through appropriately designed brackets and tabs, both a transfer of the hold-down force of the fuel rail to the fuel injector and a flexible fixation to compensate for tolerances and offsets.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Stützelements möglich.Advantageous further developments and improvements of the support element specified in the main claim are possible through the measures listed in the subclaims.
Von Vorteil ist insbesondere, daß das Stützelement in einfacher Weise durch Stanzen aus Blech herstellbar ist.It is particularly advantageous that the support element can be produced in a simple manner by stamping from sheet metal.
Auch eine Herstellung durch Tiefziehen und Stanzen ist möglich. Vorteilhafterweise entfallen bei dem erfindungsgemäßen Stützelement Schrauben oder Spannpratzen zur Befestigung des Brennstoffeinspritzventils an der Stirnseite des Zylinderkopfes .Manufacturing by deep drawing and punching is also possible. In the support element according to the invention, screws or clamping claws for fastening the fuel injection valve to the end face of the cylinder head are advantageously omitted.
Ausgestanzte Ausnehmungen sorgen bei einfacher Herstellbarkeit vorteilhafterweise für eine sichere Fixierung des Stützelements am Brennstoffeinspritzventil und eine einfache Abstützung der Brennstoffverteilerleitung.Punched-out recesses advantageously ensure a secure fixation of the support element on the fuel injection valve and simple support of the fuel distributor line while being easy to manufacture.
Verschiedene Laschenformen können in vorteilhafter Weise so ausgestaltet werden, daß eine mehr oder weniger starke elastische und plastische Verformung eine je nach der Einbausituation optimierte Abstützung zwischen Brennstoffverteilerleitung und Brennstoffeinspritzventil ermöglicht .Different lug shapes can advantageously be designed in such a way that a more or less strong elastic and plastic deformation enables a support between the fuel distributor line and the fuel injection valve that is optimized depending on the installation situation.
Zeichnungdrawing
Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Fig. 1A-D verschiedene schematische Ansichten eines ersten Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Stützelements für ein Brennstoffeinspritzventil;1A-D show various schematic views of a first exemplary embodiment of a support element designed according to the invention for a fuel injector;
Fig. 2 eine schematische perspektivische Ansicht eines zweiten Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Stützelements undFig. 2 is a schematic perspective view of a second embodiment of a support element designed according to the invention and
Fig. 3 eine schematische perspektivische Ansicht eines dritten Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Stützelements . Beschreibung der AusluhrungsbeispieleFig. 3 is a schematic perspective view of a third embodiment of a support element designed according to the invention. Description of the design examples
Die Fig. 1A bis 1D zeigen verschiedene schematische Ansichten eines ersten Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Stützelements 3 zur Fixierung eines Brennstoffeinspritzventils 1 in einem Zylinderkopf 12 einer Brennkraftmaschine und zum Anschluß des Brennstoffeinspritzventils 1 an eine Brennstoffverteilerleitung 2.1A to 1D show different schematic views of a first exemplary embodiment of a support element 3 designed according to the invention for fixing a fuel injection valve 1 in a cylinder head 12 of an internal combustion engine and for connecting the fuel injection valve 1 to a fuel distributor line 2.
Fig. 1A zeigt dabei in einer schematischen, teilgeschnittenen perspektivischen Ansicht die1A shows a schematic, partially sectioned perspective view of the
Einbausituation des Stützelements 3 mit dem Brennstoffeinspritzventil 1.Installation situation of the support element 3 with the fuel injection valve 1.
Das Brennstoffeinspritzventil 1 ist dabei in Form eines direkt einspritzenden Brennstoffeinspritzventils 1 ausgeführt, das zum direkten Einspritzen von Brennstoff in einen Brennraum einer nicht weiter dargestellten, insbesondere gemischverdichtenden, fremdgezündeten Brennkraftmaschine in eine Ventilaufnahme des Zylinderkopfs 12 einsetzbar ist. Die Ventilaufnahme kann ebenso an einem Aufnahmest tzen eines nicht dargestellten Ansaugrohrs vorgesehen sein. Das Brennstoffeinspritzventil 1 weist an einem zulaufseitigen Ende 4 eine Steckverbindung zu einem Aufnahmestutzen einer Brennstoffverteilerleitung 2 auf, die durch eine Dichtung 5 zwischen der Brennstoffverteilerleitung 2 und einem Zuleitungsstutzen 6 des Brennstoffeinspritzventils 1 abgedichtet ist. Das Brennstoffeinspritzventil 1 verfügt über einen elektrischen Anschluß 7 für die elektrische Kontaktierung zur Betätigung des Brennstoffeinspritzventils 1.The fuel injection valve 1 is designed in the form of a direct injection fuel injection valve 1, which can be used for the direct injection of fuel into a combustion chamber of a spark-ignition internal combustion engine, which is not shown in any more detail, in particular a mixture-compression-ignition engine, in a valve receptacle of the cylinder head 12. The valve seat can also be provided on a seat of a suction pipe, not shown. The fuel injection valve 1 has, on an inlet-side end 4, a plug connection to a receiving connector of a fuel distributor line 2, which is sealed by a seal 5 between the fuel distributor line 2 and a supply connector 6 of the fuel injector 1. The fuel injector 1 has an electrical connection 7 for the electrical contacting for actuating the fuel injector 1.
Um das Brennstoffeinspritzventil 1 und die Brennstoffverteilerleitung 2 radialkraftfrei voneinander zu beabstanden, ist erfindungsgemäß das Stützelement 3 vorgesehen. Das Stützelement 3 besteht aus einer Klammer 8, welche sich einerseits an einer Schulter 9 des Brennstoffeinspritzventils 1 und andererseits an einer Schulter 10 der Brennstoffverteilerleitung 2 abstützt. Die Klammer 8 ist im Bereich des elektrischen Anschlusses 7 des Brennstoffeinspritzventils 1 geschlitzt ausgebildet, um die Montage zu erleichtern.In order to space the fuel injection valve 1 and the fuel distributor line 2 from one another without radial force, the support element 3 is provided according to the invention. The support element 3 consists of a bracket 8, which is on the one hand on a shoulder 9 of the fuel injector 1 and on the other hand Shoulder 10 of the fuel rail 2 is supported. The clamp 8 is slotted in the area of the electrical connection 7 of the fuel injection valve 1 in order to facilitate assembly.
Aus Fig. 1B ist ersichtlich, wie die Klammer 8 auf das Brennstoffeinspritzventil 1 aufgesetzt ist und sich an der Schulter 9 abstützt.1B shows how the clamp 8 is placed on the fuel injection valve 1 and is supported on the shoulder 9.
Mit der Klammer 8 stehen im ersten Ausführungsbeispiel zwei Laschen 11 und zwei Bügel 18, wie insbesondere aus Fig. 1D hervorgeht, in Verbindung und sorgen für eine federnde Verspannung der Brennstoffverteilerleitung 2 gegen das Brennstoffeinspritzventil 1. Dabei sind die Laschen 11 für eine radiale Klemmwirkung und die Bügel 18 für die axiale Elastizität verantwortlich. Die Laschen 11 stützen sich an der Schulter 9 des Brennstoffeinspritzventils 1 ab, während die Bügel 18 an der Schulter 10 der Brennstoffverteilerleitung 2 anliegen.In the first exemplary embodiment, two brackets 11 and two brackets 18 are connected to the bracket 8, as can be seen in particular in FIG. 1D, and provide a resilient bracing of the fuel distributor line 2 against the fuel injector 1. The brackets 11 are for a radial clamping action and the bracket 18 responsible for the axial elasticity. The tabs 11 are supported on the shoulder 9 of the fuel injector 1, while the brackets 18 rest on the shoulder 10 of the fuel rail 2.
Die Bügel 18 sind bedingt durch ihre Form und ihren Ansatz an die Klammer 8 so ausgeführt, daß sie unter axialer Belastung plastisch-elastisch verformt werden können und dadurch eine axiale Kraft in das Brennstoffeinspritzventil 1 einleiten.The bracket 18 are due to their shape and their approach to the bracket 8 so that they can be plastically and elastically deformed under axial load and thereby introduce an axial force into the fuel injector 1.
Fig. IC zeigt eine Aufsicht auf das erste Ausführungsbeispiel des erfindungsgemäß ausgestalteten Stützelements 3 in auf das Brennstoffeinspritzventil 1 montierter Position. Um zu verhindern, daß das Stützelement 3 durch die axiale Krafteinleitung durch die Brennstoffverteilerleitung 2 radial auswandert und dadurch zu Verspannungen des Brennstoffeinspritzventils 1 im Zylinderkopf bzw. Verbiegungen des Brennstoffeinspritzventils 1 und nachfolgende Fehlfunktionen beispielsweise durch Verklemmen der Ventilnadel des Brennstoffeinspritzventils 1 führt, ist das Stützelement 3 einerseits nicht rund, sondern in einer grob rechteckigen oder quadratischen Querschnittsform ausgeführt, wobei zusätzlich Kanten 16, welche den Abschluß der Klammer 8 beidseitig einer Schlitzung 15 bilden, in Richtung auf das Brennstoffeinspritzventil 1 nach radial innen umgelegt sind. Dadurch wird erreicht, daß die Kanten 16 auf ihrer gesamten axialen Länge am Brennstoffeinspritzventil 1 anliegen und dadurch ein Verrutschen des Stützelements 3 verhindern.IC shows a top view of the first exemplary embodiment of the support element 3 designed according to the invention in the position mounted on the fuel injection valve 1. In order to prevent the support element 3 from migrating radially through the axial introduction of force through the fuel distributor line 2 and thereby causing tension in the fuel injector 1 in the cylinder head or bending of the fuel injector 1 and subsequent malfunctions, for example due to jamming of the valve needle of the fuel injector 1, the support element 3 on the one hand not round, but in a roughly rectangular or square cross-sectional shape, whereby additional edges 16, which form the end of the clamp 8 on both sides of a slit 15, are folded radially inward in the direction of the fuel injector 1. It is thereby achieved that the edges 16 rest over their entire axial length on the fuel injection valve 1 and thereby prevent the support element 3 from slipping.
Im Bereich der Schlitzung 15 befindet sich im montierten Zustand des Stützelements 3 der elektrische Anschluß 7 des Brennstoffeinspritzventils 1.In the assembled state of the support element 3, the electrical connection 7 of the fuel injection valve 1 is located in the area of the slot 15.
In Fig. 2 ist ein zweites Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Stützelements 3 dargestellt. Dieses weist dabei verschiedenartig geformte Laschen 11 auf, welche mit der Klammer 8 verbunden sind. Im Ausführungsbeispiel sind zwei einander gegenüberliegende Laschen 11b zungenförmig ausgebildet, während eine dritte Lasche 11a eine in etwa zwiebelartige Form aufweist. Eine umgekehrte Verteilung in Form von zwei zwiebeiförmigen Laschen 11a und einer zungenförmigen Lasche 11b ist ebenfalls möglich. Eine Ausnehmung 17 in der Lasche 11a sorgt für eine höhere Elastizität der Lasche 11a und somit für eine größere Toleranz gegenüber Verspannungen. Die Kanten 16 können wie in Fig. 1A-D ausgestaltet sein.2 shows a second exemplary embodiment of a support element 3 designed according to the invention. This has differently shaped tabs 11 which are connected to the bracket 8. In the exemplary embodiment, two tabs 11b lying opposite one another are tongue-shaped, while a third tab 11a has an approximately onion-like shape. A reverse distribution in the form of two onion-shaped tabs 11a and a tongue-shaped tab 11b is also possible. A recess 17 in the tab 11a ensures a higher elasticity of the tab 11a and thus a greater tolerance to tension. The edges 16 can be configured as in FIGS. 1A-D.
In Fig. 3 ist ein drittes Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Stützelements 3 dargestellt. Dieses weist dabei Laschen 11 auf, welche eine kombinierte Form aus den zungenförmigen Laschen 11b und der zwiebeiförmigen Lasche 11a des vorstehend beschriebenen zweiten Ausführungsbeispiels darstellen. Die dargestellte Form ist einfacher herstellbar, weist aber eine hohe Elastizität und Flexibilität zum Ausgleich radialer und axialer Kräfte auf. Die Kanten 16 können ebenfalls wie in Fig. 1A-D ausgestaltet sein.3 shows a third exemplary embodiment of a support element 3 designed according to the invention. This has tabs 11, which represent a combined shape of the tongue-shaped tabs 11b and the onion-shaped tab 11a of the second exemplary embodiment described above. The shape shown is easier to manufacture, but has a high elasticity and flexibility to balance radial and axial forces. The edges 16 can also be configured as in FIGS. 1A-D.
Durch die federnde Verspannung der Bauteile gegeneinander können nicht nur axiale Kräfte durch die Brennstoffverteilerleitung 2, sondern auch Fertigungstoleranzen und Längenänderungen durch Erwärmung beim Betrieb der Brennkraftmaschine ausgeglichen werden.Due to the resilient bracing of the components against one another, not only axial forces through the fuel distributor line 2, but also Manufacturing tolerances and changes in length can be compensated for by heating during operation of the internal combustion engine.
Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt und beispielsweise auch für Brennstoffeinspritzventile 1 zur Einspritzung in den Brennraum einer selbstzündenden Brennkraftmaschine anwendbar. Insbesondere können die in den Figuren dargestellten Stützelemente 3 auch in umgekehrter Einbaulage montiert werden, so daß sich die Bügel 18 an der Schulter 9 des Brennstoffeinspritzventils 1 statt an der Schulter 10 der Brennstoffverteilerleitung 2 abstützen. Alle Merkmale der Erfindung sind beliebig miteinander kombinierbar. The invention is not limited to the exemplary embodiments shown and can also be used, for example, for fuel injection valves 1 for injection into the combustion chamber of a self-igniting internal combustion engine. In particular, the support elements 3 shown in the figures can also be installed in the reverse installation position, so that the brackets 18 are supported on the shoulder 9 of the fuel injection valve 1 instead of on the shoulder 10 of the fuel distributor line 2. All features of the invention can be combined with one another as desired.

Claims

Ansprüche Expectations
1. Stützelement zur wechselseitigen Abstützung eines Brennstoffeinspritzventils (1) in einer Ventilaufnahme, insbesondere der Ventilaufnahme eines Zylinderkopfes (12) einer Brennkraftmaschine und des Brennstoffeinspritzventils (1) an einer Brennstoffverteilerleitung (2) , dadurch gekennzeichnet, daß das Stützelement (3) eine Klammer (8) und daran ausgebildete Laschen (11) und Bügel (18) aufweist.1. Support element for the mutual support of a fuel injection valve (1) in a valve holder, in particular the valve holder of a cylinder head (12) of an internal combustion engine and the fuel injection valve (1) on a fuel distributor line (2), characterized in that the support element (3) is a bracket ( 8) and tabs (11) and brackets (18) formed thereon.
2. Stützelement nach Anspruch 1, dadurch gekennzeichnet, daß sich die Bügel (18) an einer Schulter (10) der Brennstoffverteilerleitung (2) abstützen.2. Support element according to claim 1, characterized in that the bracket (18) on a shoulder (10) of the fuel rail (2) are supported.
3. Stützelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sich die Laschen (11) an einer Schulter (9) des Brennstoffeinspritzventils (1) abstützen.3. Support element according to claim 1 or 2, characterized in that the tabs (11) on a shoulder (9) of the fuel injector (1) are supported.
4. Stützelement nach Anspruch 1, dadurch gekennzeichnet, daß sich die Bügel (18) an einer Schulter (9) des Brennstoffeinspritzventils (1) abstützen.4. Support element according to claim 1, characterized in that the brackets (18) on a shoulder (9) of the fuel injector (1) are supported.
5. Stützelement nach Anspruch 4, dadurch gekennzeichnet, daß sich die Laschen (11) an einer Schulter (10) der Brennstoffverteilerleitung (2) abstützen.5. Support element according to claim 4, characterized in that the tabs (11) are supported on a shoulder (10) of the fuel distributor line (2).
6. Stützelement nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Anzahl der Bügel (18) zwei beträgt.6. Support element according to one of claims 1 to 5, characterized in that the number of brackets (18) is two.
7. Stützelement nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Anzahl der Laschen (11) zumindest zwei beträgt.7. Support element according to one of claims 1 to 6, characterized in that the number of tabs (11) is at least two.
8. Stützelement nach Anspruch 7, dadurch gekennzeichnet, daß die Laschen (11) das Brennstoffeinspritzventil (1) umgreifen.8. Support element according to claim 7, characterized in that the tabs (11) encompass the fuel injection valve (1).
9. Stützelement nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Anzahl der Laschen (11) drei beträgt.9. Support element according to one of claims 1 to 6, characterized in that the number of tabs (11) is three.
10. Stützelement nach Anspruch 9, dadurch gekennzeichnet, daß die drei Laschen (11) gleich geformt sind.10. Support element according to claim 9, characterized in that the three tabs (11) are shaped the same.
11. Stützelement nach Anspruch 10, dadurch gekennzeichnet, daß die drei Laschen (11) mehrfach geschwungen ausgebildet sind.11. Support element according to claim 10, characterized in that the three tabs (11) are formed several times curved.
12. Stützelement nach Anspruch 9, dadurch gekennzeichnet, daß die Laschen (11) unterschiedliche Formen aufweisen.12. Support element according to claim 9, characterized in that the tabs (11) have different shapes.
13. Stützelement nach Anspruch 9, dadurch gekennzeichnet, daß zwei der drei Laschen (11) eine gleiche Form aufweisen.13. Support element according to claim 9, characterized in that two of the three tabs (11) have the same shape.
14. Stützelement nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß zumindest eine der drei Laschen (11) in Form einer zungenförmigen Lasche (11b) ausgebildet ist. 14. Support element according to claim 12 or 13, characterized in that at least one of the three tabs (11) is in the form of a tongue-shaped tab (11b).
15. Stützelement nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, daß zumindest eine der drei Laschen (11) eine zwiebelartige Form (11a) aufweist.15. Support element according to one of claims 12 to 14, characterized in that at least one of the three tabs (11) has an onion-like shape (11 a).
16. Stützelement nach Anspruch 15, dadurch gekennzeichnet, daß die zwiebelartig geformte Lasche (11a) eine Ausnehmung (17) aufweist.16. Support element according to claim 15, characterized in that the onion-shaped tab (11a) has a recess (17).
17. Stützelement nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß die Klammer (8) im Bereich einer elektrischen Zuleitung (7) des Brennstoffeinspritzventils (1) eine Schlitzung (15) aufweist.17. Support element according to one of claims 1 to 16, characterized in that the bracket (8) in the region of an electrical feed line (7) of the fuel injector (1) has a slot (15).
18. Stützelement nach einem der Ansprüche 1 bis 17, dadurch gekennzeichnet, daß die Klammer (8) aus Federstahl durch Stanzen hergestellt ist.18. Support element according to one of claims 1 to 17, characterized in that the bracket (8) is made of spring steel by stamping.
19. Stützelement nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß die Klammer (8) Kanten (16) aufweist, welche nach radial innen umgelegt an dem Brennstoffeinspritzventil (1) anliegen.19. Support element according to one of claims 1 to 18, characterized in that the bracket (8) has edges (16) which rest against the fuel injection valve (1) in a radially inward direction.
20. Stützelement nach einem der Ansprüche 1 bis 19, dadurch gekennzeichnet, daß das Stützelement (3) eine rechteckige, insbesondere quadratische, Querschnittsform aufweist.20. Support element according to one of claims 1 to 19, characterized in that the support element (3) has a rectangular, in particular square, cross-sectional shape.
21. Stützelement nach einem der Ansprüche 1 bis 20, dadurch gekennzeichnet, daß das Brennstoffeinspritzventil (1) durch das Stützelement (3) gegen die Brennstoffverteilerleitung (2) verspannt ist.21. Support element according to one of claims 1 to 20, characterized in that the fuel injection valve (1) is braced by the support element (3) against the fuel rail (2).
22. Stützelement nach einem der Ansprüche 1 bis 21, dadurch gekennzeichnet, daß das Stützelement (3) durch den Zylinderkopf (12) der Brennkraftmaschine geführt ist. 22. Support element according to one of claims 1 to 21, characterized in that the support element (3) is guided through the cylinder head (12) of the internal combustion engine.
EP04817133.4A 2003-12-17 2004-11-12 Supporting element Ceased EP1706626B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10359299A DE10359299A1 (en) 2003-12-17 2003-12-17 support element
PCT/EP2004/052943 WO2005059348A2 (en) 2003-12-17 2004-11-12 Supporting element

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EP1706626A2 true EP1706626A2 (en) 2006-10-04
EP1706626B1 EP1706626B1 (en) 2017-03-08

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JP (1) JP4550741B2 (en)
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WO (1) WO2005059348A2 (en)

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Also Published As

Publication number Publication date
JP4550741B2 (en) 2010-09-22
US7581530B2 (en) 2009-09-01
WO2005059348A3 (en) 2007-07-26
WO2005059348A2 (en) 2005-06-30
JP2006521486A (en) 2006-09-21
DE10359299A1 (en) 2005-08-25
EP1706626B1 (en) 2017-03-08
US20080105236A1 (en) 2008-05-08

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