EP1706626B1 - Supporting element - Google Patents

Supporting element Download PDF

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Publication number
EP1706626B1
EP1706626B1 EP04817133.4A EP04817133A EP1706626B1 EP 1706626 B1 EP1706626 B1 EP 1706626B1 EP 04817133 A EP04817133 A EP 04817133A EP 1706626 B1 EP1706626 B1 EP 1706626B1
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EP
European Patent Office
Prior art keywords
support element
element according
injection valve
fuel injection
lugs
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.)
Expired - Fee Related
Application number
EP04817133.4A
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German (de)
French (fr)
Other versions
EP1706626A2 (en
Inventor
Martin Scheffel
Werner Berger
Anh-Tuan Hoang
Jens Pohlmann
Martin BÜHNER
Thomas FRÖHNER
Cedric Olivier
Martin Andorfer
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Publication date
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Publication of EP1706626A2 publication Critical patent/EP1706626A2/en
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Publication of EP1706626B1 publication Critical patent/EP1706626B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M61/16—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 of a fuel injection valve used in a cylinder head of an internal combustion engine according to the preamble of the main claim.
  • a fastening device for a fuel injection valve for attachment to a suction tube in which the axial fixation of the fuel injection valve on the fuel distributor line or on a plug-in nipple by a fastener, which is designed as a U-shaped securing clip provided with two resiliently resilient legs is.
  • the securing clip engages in the assembled state by corresponding recesses of the plug-in nipple and can be latched in a recess formed as an annular groove in a connecting piece of the fuel injection valve.
  • the axial clearance between the recesses and the securing clip as well as between the annular groove and the securing clip should be kept small in order to achieve an exact fixation of the fuel injection valve without tension of the seal.
  • a disadvantage of the DE 29 26 490 A1 known fastening device is in particular the bracing effect of the various mounting parts on the fuel injection valve.
  • the power flow generated in the fuel injection valve leads to deformations and thus to changes in the stroke of the valve needle to jamming and to a pressure ode r bending load of the housing parts, which are generally thin-walled and welded together at several points.
  • each fastening measure leads, for example by a support collar to increase the radial extent of the fuel injection valve and thus to an increased space requirement during installation.
  • 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 supply line via the support element according to the invention without radial force on the fuel injector and thus eliminates tension and subsequent damage to the fuel injector and the connection of the fuel rail.
  • the support member provides by appropriately designed brackets and tabs both for a carryover of the hold-down force of the fuel rail to the fuel injector as well as for tolerances and offsets compensating flexible fixation.
  • a particular advantage is that the support element can be produced in a simple manner by stamping sheet metal. A production by deep drawing and punching is possible.
  • Punched-in recesses advantageously provide ease of manufacture for a secure fixation of the support element on the fuel injection valve and a simple support of the fuel distribution line.
  • tab shapes can be designed in an advantageous manner so that a more or less strong elastic and plastic deformation allows optimized depending on the installation situation support between the fuel rail and fuel injector.
  • Fig. 1A to 1D show various schematic views of a first embodiment of an inventively designed support member 3 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 distribution line. 2
  • Fig. 1A shows in a schematic, partially cutaway perspective view of the installation situation of the support member 3 with the fuel injection valve.
  • the fuel injection valve 1 is designed in the form of a direct-injection fuel injection valve 1, which is used for direct injection of fuel into a combustion chamber of a non-illustrated, in particular mixture-compressing, spark-ignition internal combustion engine in a valve seat of the cylinder head 12.
  • the valve receptacle can also be provided on a receiving socket of a suction pipe, not shown.
  • the fuel injection valve 1 has at a feed end 4 a plug connection to a receiving socket of a fuel distributor line 2, which is sealed by a seal 5 between the fuel distributor line 2 and a supply pipe 6 of the fuel injection valve 1.
  • the fuel injection valve 1 has an electrical connection 7 for the electrical contacting for actuating the fuel injection valve 1.
  • the support element 3 is provided according to the invention.
  • the support member 3 consists of a bracket 8, which on the one hand on a shoulder 9 of the fuel injection valve 1 and on the other hand on a Shoulder 10 of the fuel distribution line 2 is supported.
  • the bracket 8 is slotted in the region of the electrical connection 7 of the fuel injection valve 1 in order to facilitate assembly.
  • bracket 8 With the bracket 8 are in the first embodiment, two tabs 11 and two brackets 18, as in particular Fig. 1D emerges in conjunction and provide a resilient tension of the fuel rail 2 against the fuel injector 1.
  • the tabs 11 are responsible for a radial clamping action and the bracket 18 for the axial elasticity.
  • the tabs 11 are based on the shoulder 9 of the fuel injection valve 1, while the bracket 18 abut the shoulder 10 of the fuel rail 2.
  • the bracket 18 are due to their shape and their approach to the bracket 8 designed so that they can be plastically-elastically deformed under axial load and thereby initiate an axial force in the fuel injector 1.
  • Fig. 1C shows a plan view of the first embodiment of the inventively designed support member 3 in mounted on the fuel injector 1 position.
  • the support element 3 In order to prevent the support element 3 from radially migrating due to the axial introduction of force through the fuel distributor line 2 and thereby to tensioning of the fuel injection valve 1 in the cylinder head or bending of the fuel injection valve 1 and subsequent malfunctions, for example by jamming of the valve needle of the fuel injection valve 1, the support element 3 not round, but executed in a roughly rectangular or square cross-sectional shape, wherein
  • edges 16, which form the conclusion of the clip 8 on both sides of a slit 15 are folded in the direction of the fuel injection valve 1 radially inward. This ensures that the edges 16 bear against the fuel injector 1 over its entire axial length and thereby prevent slippage of the support element 3.
  • a second embodiment of an inventively designed support member 3 is shown.
  • This has variously shaped tabs 11, which are connected to the bracket 8.
  • two opposing tabs 11b are tongue-shaped, while a third tab 11a has an approximately onion-like shape.
  • An inverse 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 provides for a higher elasticity of the tab 11a and thus for a greater tolerance to tension.
  • the edges 16 can as in Fig. 1A-D be designed.
  • a third embodiment of an inventively designed support member 3 is shown.
  • This has in this case tabs 11, which represent a combined form of the tongue-shaped tabs 11b and the onion-shaped tab 11a of the second embodiment described above.
  • the illustrated shape is easier to manufacture, but has a high elasticity and flexibility to compensate for radial and axial forces.
  • the edges 16 can also be as in Fig. 1A-D be designed.
  • the invention is not limited to the illustrated embodiments and, for example, for fuel injection valves 1 for injection into the combustion chamber of a self-igniting internal combustion engine applicable.
  • the support elements 3 shown in the figures can also be mounted in the reverse installed position, so that the bracket 18 are supported on the shoulder 9 of the fuel injection valve 1 instead of the shoulder 10 of the fuel distribution line 2. All features of the invention can be combined with one another as desired.

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  • 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)

Description

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 of 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 A1 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 Sicherungsklammer 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.It is already out of the DE 29 26 490 A1 a fastening device for a fuel injection valve for attachment to a suction tube, in which the axial fixation of the fuel injection valve on the fuel distributor line or on a plug-in nipple by a fastener, which is designed as a U-shaped securing clip provided with two resiliently resilient legs is. The securing clip engages in the assembled state by corresponding recesses of the plug-in nipple and can be latched in a recess formed as an annular groove in a connecting piece of the fuel injection valve. The axial clearance between the recesses and the securing clip as well as between the annular groove and the securing clip should be kept small in order to achieve an exact fixation of the fuel injection valve without tension of the seal.

Nachteilig an der aus der DE 29 26 490 A1 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.A disadvantage of the DE 29 26 490 A1 known fastening device is in particular the bracing effect of the various mounting parts on the fuel injection valve. The power flow generated in the fuel injection valve leads to deformations and thus to changes in the stroke of the valve needle to jamming and to a pressure ode r bending load of the housing parts, which are generally thin-walled and welded together at several points. In addition, each fastening measure leads, for example by a support collar to increase the radial extent of the fuel injection valve and thus to an increased space requirement during installation.

Dokument US 5 970 953 A zeigt eine Befestigungsvorrichtung zum Befestigen eines Kraftstoffeinspritzventils an einer Kraftstoffleitung.document US Pat. No. 5,970,953 shows a fastening device for securing a fuel injection valve to a fuel line.

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 supply line via the support element according to the invention without radial force on the fuel injector and thus eliminates tension and subsequent damage to the fuel injector and the connection of the fuel rail. The support member provides by appropriately designed brackets and tabs both for a carryover of the hold-down force of the fuel rail to the fuel injector as well as for tolerances and offsets compensating flexible fixation.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Stützelements möglich.The measures listed in the dependent claims advantageous refinements and improvements of the main claim support element are possible.

Von Vorteil ist insbesondere, daß das Stützelement in einfacher Weise durch Stanzen aus Blech herstellbar ist. Auch eine Herstellung durch Tiefziehen und Stanzen ist möglich.A particular advantage is that the support element can be produced in a simple manner by stamping sheet metal. A production by deep drawing and punching is possible.

Vorteilhafterweise entfallen bei dem erfindungsgemäßen Stützelement Schrauben oder Spannpratzen zur Befestigung des Brennstoffeinspritzventils an der Stirnseite des Zylinderkopfes.Advantageously, eliminated in the support element according to the invention screws or Spannpratzen for mounting the fuel injection valve on the front side of the cylinder head.

Ausgestanzte Ausnehmungen sorgen bei einfacher Herstellbarkeit vorteilhafterweise für eine sichere Fixierung des Stützelements am Brennstoffeinspritzventil und eine einfache Abstützung der Brennstoffverteilerleitung.Punched-in recesses advantageously provide ease of manufacture for a secure fixation of the support element on the fuel injection valve and a simple support of the fuel distribution line.

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.Various tab shapes can be designed in an advantageous manner so that a more or less strong elastic and plastic deformation allows optimized depending on the installation situation support between the fuel rail and fuel injector.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1A-D
verschiedene schematische Ansichten eines ersten Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Stützelements für ein Brennstoffeinspritzventil;
Fig. 2
eine schematische perspektivische Ansicht eines zweiten Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Stützelements und
Fig. 3
eine schematische perspektivische Ansicht eines dritten Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Stützelements.
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
various schematic views of a first embodiment of an inventively designed support member for a fuel injection valve;
Fig. 2
a schematic perspective view of a second embodiment of an inventively designed support member and
Fig. 3
a schematic perspective view of a third embodiment of an inventively designed support member.

Beschreibung der AusführungsbeispieleDescription of the embodiments

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.The Fig. 1A to 1D show various schematic views of a first embodiment of an inventively designed support member 3 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 distribution line. 2

Fig. 1A zeigt dabei in einer schematischen, teilgeschnittenen perspektivischen Ansicht die Einbausituation des Stützelements 3 mit dem Brennstoffeinspritzventil 1. Fig. 1A shows in a schematic, partially cutaway perspective view of the installation situation of the support member 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 Aufnahmestutzen 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 is used for direct injection of fuel into a combustion chamber of a non-illustrated, in particular mixture-compressing, spark-ignition internal combustion engine in a valve seat of the cylinder head 12. The valve receptacle can also be provided on a receiving socket of a suction pipe, not shown. The fuel injection valve 1 has at a feed end 4 a plug connection to a receiving socket of a fuel distributor line 2, which is sealed by a seal 5 between the fuel distributor line 2 and a supply pipe 6 of the fuel injection valve 1. The fuel injection valve 1 has an electrical connection 7 for the electrical contacting for actuating the fuel injection valve 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 radially from one another, the support element 3 is provided according to the invention. The support member 3 consists of a bracket 8, which on the one hand on a shoulder 9 of the fuel injection valve 1 and on the other hand on a Shoulder 10 of the fuel distribution line 2 is supported. The bracket 8 is slotted in the region 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.Out Fig. 1B It can be seen how the bracket 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.With the bracket 8 are in the first embodiment, two tabs 11 and two brackets 18, as in particular Fig. 1D emerges in conjunction and provide a resilient tension of the fuel rail 2 against the fuel injector 1. The tabs 11 are responsible for a radial clamping action and the bracket 18 for the axial elasticity. The tabs 11 are based on the shoulder 9 of the fuel injection valve 1, while the bracket 18 abut 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 designed so that they can be plastically-elastically deformed under axial load and thereby initiate an axial force in the fuel injector 1.

Fig. 1C 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. Fig. 1C shows a plan view of the first embodiment of the inventively designed support member 3 in mounted on the fuel injector 1 position. In order to prevent the support element 3 from radially migrating due to the axial introduction of force through the fuel distributor line 2 and thereby to tensioning of the fuel injection valve 1 in the cylinder head or bending of the fuel injection valve 1 and subsequent malfunctions, for example by jamming of the valve needle of the fuel injection valve 1, the support element 3 not round, but executed in a roughly rectangular or square cross-sectional shape, wherein In addition, edges 16, which form the conclusion of the clip 8 on both sides of a slit 15, are folded in the direction of the fuel injection valve 1 radially inward. This ensures that the edges 16 bear against the fuel injector 1 over its entire axial length and thereby prevent slippage of the support element 3.

Im Bereich der Schlitzung 15 befindet sich im montierten Zustand des Stützelements 3 der elektrische Anschluß 7 des Brennstoffeinspritzventils 1.In the region of the slit 15 is in the mounted state of the support member 3, the electrical connection 7 of the fuel injection valve. 1

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 zwiebelförmigen 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.In Fig. 2 a second embodiment of an inventively designed support member 3 is shown. This has variously shaped tabs 11, which are connected to the bracket 8. In the embodiment, two opposing tabs 11b are tongue-shaped, while a third tab 11a has an approximately onion-like shape. An inverse 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 provides for a higher elasticity of the tab 11a and thus for a greater tolerance to tension. The edges 16 can as in Fig. 1A-D be designed.

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 zwiebelförmigen 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.In Fig. 3 a third embodiment of an inventively designed support member 3 is shown. This has in this case tabs 11, which represent a combined form of the tongue-shaped tabs 11b and the onion-shaped tab 11a of the second embodiment described above. The illustrated shape is easier to manufacture, but has a high elasticity and flexibility to compensate for radial and axial forces. The edges 16 can also be as in Fig. 1A-D be designed.

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 elastic tension of the components against each other not only axial forces through the fuel distribution line 2, but also Manufacturing tolerances and changes in length are compensated 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 illustrated embodiments and, for example, for fuel injection valves 1 for injection into the combustion chamber of a self-igniting internal combustion engine applicable. In particular, the support elements 3 shown in the figures can also be mounted in the reverse installed position, so that the bracket 18 are supported on the shoulder 9 of the fuel injection valve 1 instead of the shoulder 10 of the fuel distribution line 2. All features of the invention can be combined with one another as desired.

Claims (15)

  1. Support element for the two-way support of a fuel injection valve (1) in a valve receptacle, in particular the valve receptacle of a cylinder head (12) of an internal combustion engine, and of the fuel injection valve (1) on a fuel distributor line (2),
    wherein the support element (3) has a bracket (8) and lugs (11) and bows (18) formed thereon,
    wherein the lugs (11) are supported on a shoulder (9) of the fuel injection valve (1) and engage around the fuel injection valve (1),
    wherein the bows (18) are supported on a shoulder (10) of the fuel distributor line (2), and
    wherein the bows (18) effect resilient bracing, with axial elasticity, of the fuel distributor line (2) against the fuel injection valve (1),
    characterized
    in that the support element (3) has a rectangular or square cross-sectional shape,
    and in that the bracket (8) has edges (16) which are folded in a radially inward direction in order to bear, over their entire axial length, against the fuel injection valve (1).
  2. Support element according to Claim 1,
    characterized
    in that the number of bows (18) is two.
  3. Support element according to either of Claims 1 and 2,
    characterized
    in that the number of lugs (11) is at least two.
  4. Support element according to either of Claims 1 and 2,
    characterized
    in that the number of lugs (11) is three.
  5. Support element according to Claim 4,
    characterized
    in that the three lugs (11) are of identical shape.
  6. Support element according to Claim 5,
    characterized
    in that the three lugs (11) are of multiply curved form.
  7. Support element according to Claim 4,
    characterized
    in that the lugs (11) have different shapes.
  8. Support element according to Claim 4,
    characterized
    in that two of the three lugs (11) have an identical shape.
  9. Support element according to Claim 7 or 8,
    characterized
    in that at least one of the three lugs (11) is in the form of a tongue-shaped lug (11b).
  10. Support element according to Claim 7 or 8,
    characterized
    in that at least one of the three lugs (11) has an onion-like shape (11a).
  11. Support element according to Claim 10,
    characterized
    in that the lug (11a) of onion-like shape has a recess (17).
  12. Support element according to one of Claims 1 to 11,
    characterized
    in that the bracket (8) has a slot (15) in the region of an electrical supply line (7) of the fuel injection valve (1).
  13. Support element according to one of Claims 1 to 12,
    characterized
    in that the bracket (8) is produced from spring steel by punching.
  14. Support element according to one of Claims 1 to 13,
    characterized
    in that the fuel injection valve (1) is braced against the fuel distributor line (2) by the support element (3).
  15. Support element according to one of Claims 1 to 14,
    characterized
    in that the support element (3) is led through the cylinder head (12) of the internal combustion engine.
EP04817133.4A 2003-12-17 2004-11-12 Supporting element Expired - Fee Related 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

Publications (2)

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

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EP04817133.4A Expired - Fee Related EP1706626B1 (en) 2003-12-17 2004-11-12 Supporting element

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US (1) US7581530B2 (en)
EP (1) EP1706626B1 (en)
JP (1) JP4550741B2 (en)
DE (1) DE10359299A1 (en)
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
EP1706626A2 (en) 2006-10-04
WO2005059348A3 (en) 2007-07-26
DE10359299A1 (en) 2005-08-25
JP2006521486A (en) 2006-09-21
WO2005059348A2 (en) 2005-06-30
US20080105236A1 (en) 2008-05-08

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