EP1570171B1 - Supporting element - Google Patents

Supporting element Download PDF

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Publication number
EP1570171B1
EP1570171B1 EP03750336A EP03750336A EP1570171B1 EP 1570171 B1 EP1570171 B1 EP 1570171B1 EP 03750336 A EP03750336 A EP 03750336A EP 03750336 A EP03750336 A EP 03750336A EP 1570171 B1 EP1570171 B1 EP 1570171B1
Authority
EP
European Patent Office
Prior art keywords
support element
injection valve
fuel injection
fuel
element according
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 - Lifetime
Application number
EP03750336A
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German (de)
French (fr)
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EP1570171A1 (en
Inventor
Martin Scheffel
Werner Berger
Rainer Norgauer
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
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Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP1570171A1 publication Critical patent/EP1570171A1/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
    • F02M61/16—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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • F02M61/14—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 C2 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 changes in the stroke of the valve needle to jamming and to a pressure or 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 WO 00/42315 A discloses a spring clip having a first portion with elongated fingers adapted to span a portion of the valve body and nestable in a receiving portion of a fuel rail shell.
  • the elongated fingers contain a backward curvature and terminate in a bridging section.
  • the curved elongate fingers define finger segments on each side of the backward curvature. The finger segments diverge from the backward curvature towards the bridging portions and converge behind to form generally diamond-shaped spring members.
  • a second portion of generally planar shape having spaced legs engages slots in the injector body.
  • the second portion includes a wall portion that extends substantially perpendicular to the spaced legs and connects the bridging portion.
  • the legs When the injector is mounted in the fuel rail, the legs are received in slots in the injector and the elongated finger segments are compressed between the fuel rail and the injector.
  • the fuel injector is pinched between the legs and fingers with a force acting toward the head of the engine.
  • 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 element ensures both a transfer of the hold-down force of the fuel distribution line to the fuel injection valve as well as a tolerance 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.
  • a guide through the cylinder head or projections engaging behind also provide for a support of the radial forces of the support element.
  • 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 1C show schematic partial sections through an embodiment of a fuel injection valve 1, a fuel distributor line 2 and a support member 3 to be mounted therebetween before and after the assembly of said components.
  • a fuel injection valve 1 is designed in the form of a directly injecting fuel injection valve 1, the direct injection of fuel into a combustion chamber of a non-illustrated, in particular mixture-compressing, spark-ignited internal combustion engine in a valve seat of a Cylinder head is used.
  • the valve receptacle can also be provided on a receiving socket of a suction pipe, not shown.
  • the fuel injection valve 1 has at an inlet-side 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 element 3 consists of a clamp 8, which is supported 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.
  • the bracket 8 is slotted in the region of the electrical connection 7 of the fuel injection valve 1 in order to facilitate assembly.
  • FIG. 1C It can be seen that the embodiment of an inventively designed support member 3 has a round cross-section. Alternative forms are in the FIGS. 3C and 4 shown.
  • Two tabs 11 are in communication with the bracket 8 and provide a resilient tension of the fuel rail 2 against the fuel injector 1.
  • a detailed illustration of the bracket 8 is the views in the Figs. 3A to 3C, 4 and 5A to 5C as well as the following description.
  • Fig. 2A to 2D show schematic, partially cut-away sections of the in Fig. 1A and 1B shown fuel injection system in the region of the connection piece. 6 of the fuel injection valve 1 and the fuel distribution pipe 2.
  • the Fig. 2A to 2D represent different ways of supporting the radial forces between the support member 3 and the fuel injection valve 1 for approximately running support elements 3.
  • Fig. 2A is a first, simplest embodiment shown, in which the support member 3 by a guide member 12, which may be, for example, the cylinder head is guided so that a radial deflection of the support member 3 by the force exerted by the fuel manifold 2 pressure is not possible.
  • the support member 3 receives an at least partially circumferential groove 13 which, together with a formed on the shoulder 9 of the fuel injector 1 projection 14 by meshing also ensures that the tabs 11 of the support member 3 can not emigrate radially.
  • a non-inventive chamfer of the shoulder 9 of the fuel injector 1 and / or the tabs 11 of the support member 3 lends itself to the radial force-free support on the shoulder 9 of the fuel injector 1 at.
  • Fig. 2C is only the shoulder 9 inclined at an angle ⁇
  • Fig. 2D Both the shoulder 9 of the fuel injection valve 1 and the tabs 11 of the support member 3 are inclined at a preferably equal angle ⁇ . Also by this measure, a migration of the tabs 11 can be prevented under axial force.
  • the support member 3 can be taken unchanged.
  • FIGS. 3A to 3C and 4 represent schematic views and partial sections of the in the Fig. 1 and 2 shown Embodiment of a support member 3 in non-assembled state. Identical components are provided in all figures with matching reference numerals.
  • Fig. 3A shows a side view of the support member 3
  • Fig. 3B a front view
  • Fig. 3C a top view
  • Fig. 4 a top view of an alternative to Fig. 3C to see further embodiment.
  • Fig. 3A shows the support member 3 with the bracket 8 and the tabs 11.
  • the tabs 11 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 ,
  • the clamps 11 are on the shoulder 9 of the fuel injection valve 1 at.
  • Fig. 3B shows a view of the slotted side of the support member 3. 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
  • FIGS. 3C and 4 In the same view in the outflow direction considered two possible embodiments for the support member 3.
  • the support member 3 In order to prevent the support member 3 radially through the axial force transmission through the fuel rail 2 and thereby to tension of the fuel injector 1 in the cylinder head or bending of the fuel injector 1 and subsequent Malfunction occurs, for example, by jamming the valve needle of the fuel injection valve 1, the support member 3 on the one hand not round, but in a roughly rectangular or square cross-sectional shape, with additional edges 16, which form the conclusion of the clip 8 on both sides of the slits 15, in the direction of the Fuel injection valve 1 are folded 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.
  • FIG. 5A to 5C another embodiment of a support member 3 is shown.
  • This has annular tabs 11, which are connected to the bracket 8.
  • a recess 17 in the annular lugs 11 ensures a higher elasticity of the tabs 11 and thus for a greater tolerance to axial tension.
  • the edges 16 can as in 3C or 4 be designed.
  • the invention is also applicable to fuel injection valves 1 for injection into the combustion chamber of a self-igniting internal combustion engine.

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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)

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 C2 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 C2 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 C2 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- oder 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 C2 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 changes in the stroke of the valve needle to jamming and to a pressure or 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.

Die WO 00/42315 A offenbart eine Federklemme, welche einen ersten Abschnitt mit länglichen Fingern aufweist, die angepasst sind, um einen Abschnitt des Ventilkörpers zu umspannen und in einem Aufnahmeabschnitt einer Kraftstoffverteilerleitungsschale aufnembar ist. Die länglichen Finger enthalten eine rückwärts gerichtete Krümmung und enden in einem überbrückenden Abschnitt. Die gekrümmten länglichen Finger definieren Fingersegmente auf jeder Seite der rückwärts gerichteten Krümmung. Die Fingersegmente laufen von der rückwärts gerichteten Krümmung auseinander in Richtung der überbrückenden Abschnitte und konvergieren dahinter, um im Allgemeinen rautenförmige Federelemente zu bilden. Ein zweiter Abschnitt von im Allgemeinen ebener Form, welcher beabstandete Beine aufweist, nimmt Schlitze in dem Einspritzkörper in Eingriff. Der zweite Abschnitt enthält einen Wandabschnitt, der sich im Wesentlichen senkrecht zu den beabstandeten Beinen erstreckt und den überbrückenden Abschnitt verbindet. Wenn der Einspritzer in der Kraftstoffverteilerleitungsschale montiert ist, sind die Beine in Schlitzen in dem Einspritzkörper aufgenommen und die länglichen Fingersegmente werden zwischen der Kraftstoffverteilerleitungsschale und dem Einspritzkörper komprimiert. Der Kraftstoffeinspritzer wird zwischen den Beinen und den Fingern mit einer Kraft eingeklemmt, die in Richtung des Kopfes des Motors wirkt.The WO 00/42315 A discloses a spring clip having a first portion with elongated fingers adapted to span a portion of the valve body and nestable in a receiving portion of a fuel rail shell. The elongated fingers contain a backward curvature and terminate in a bridging section. The curved elongate fingers define finger segments on each side of the backward curvature. The finger segments diverge from the backward curvature towards the bridging portions and converge behind to form generally diamond-shaped spring members. A second portion of generally planar shape having spaced legs engages slots in the injector body. The second portion includes a wall portion that extends substantially perpendicular to the spaced legs and connects the bridging portion. When the injector is mounted in the fuel rail, the legs are received in slots in the injector and the elongated finger segments are compressed between the fuel rail and the injector. The fuel injector is pinched between the legs and fingers with a force acting toward the head of the engine.

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 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 element ensures both a transfer of the hold-down force of the fuel distribution line to the fuel injection valve as well as a tolerance 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 vorteilhafte Führungsvarianten wie angeschrägte Bauteile, deren geneigte Flächen nach radial innen abfallen, eine Führung durch den Zylinderkopf oder einander hintergreifende Vorsprünge sorgen ebenfalls für eine Abstützung der Radialkräfte des Stützelements.Various advantageous guide variants such as bevelled components whose inclined surfaces fall radially inward, a guide through the cylinder head or projections engaging behind also provide for a support of the radial forces of the support element.

Besonders vorteilhaft ist dabei das Anlegen der Kanten des Stützelements entlang der axialen Erstreckung des Stützelements nach in radialer Richtung innen, wodurch das Stützelement auf ganzer Länge am Brennstoffeinspritzventil anliegt und der Gefahr des Aufbiegens des Stützelements begegnet werden kann.Particularly advantageous is the application of the edges of the support element along the axial extent of the support element inward in the radial direction, whereby the support element rests on the full length of the fuel injector and the risk of bending of the support element can be met.

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
eine schematische, teilweise geschnittene Ansicht eines nicht erfindungsgemäßen Ausführungsbeispiels eines mit einem erfindungsgemäß ausgestalteten Stützelement kombinierbaren Brennstoffeinspritzventils vor der Montage;
Fig. 1B
eine schematische, teilweise geschnittene Ansicht des in Fig. 1A dargestellten nicht erfindungsgemäßen Ausführungsbeispiels in montiertem Zustand;
Fig. 1C
eine Aufsicht auf das in Fig. 1A und 1B dargestellte nicht erfindungsgemäße Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Stützelements;
Fig. 2A, C, D
drei nicht erfindungsgemäße Ausführungsformen für radialkraftfrei gestaltete Stützelemente;
Fig 2B Fig. 3A-C
eine erfindungsgemäße Ausführungsform; eine nicht erfindungsgemäße Ausführungsform eines radialkraftfreien Stützelements in drei verschiedenen Ansichten;
Fig. 4
eine nicht erfindungsgemäße Ausführungsform eines radialkraftfreien Stützelements; und
Fig. 5A-C
eine nicht erfindungsgemäße Ausführungsform eines radialkraftfreien Stützelements in drei verschiedenen Ansichten.
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
a schematic, partially sectioned view of a non-inventive embodiment of a inventively designed support member combinable fuel injector before assembly;
Fig. 1B
a schematic, partially sectioned view of the in Fig. 1A illustrated non-inventive embodiment in the assembled state;
Fig. 1C
a supervision on the in Fig. 1A and 1B not illustrated embodiment of a present invention configured support member;
Fig. 2A, C, D.
three non-inventive embodiments for radial force-free designed support elements;
Fig. 2B Fig. 3A-C
an embodiment of the invention; a non-inventive embodiment of a radial force-free support member in three different views;
Fig. 4
a non-inventive embodiment of a radial force-free support member; and
Fig. 5A-C
a non-inventive embodiment of a radial force-free support member in three different views.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Fig. 1A bis 1C zeigen schematisierte Teilschnitte durch ein Ausführungsbeispiel eines Brennstoffeinspritzventils 1, einer Brennstoffverteilerleitung 2 sowie eines dazwischen anzubringenden Stützelements 3 vor und nach der Montage der genannten Bauteile. Fig. 1A to 1C show schematic partial sections through an embodiment of a fuel injection valve 1, a fuel distributor line 2 and a support member 3 to be mounted therebetween before and after the assembly of said components.

Ein 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 eines Zylinderkopfs 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.A fuel injection valve 1 is designed in the form of a directly injecting fuel injection valve 1, the direct injection of fuel into a combustion chamber of a non-illustrated, in particular mixture-compressing, spark-ignited internal combustion engine in a valve seat of a Cylinder head is used. The valve receptacle can also be provided on a receiving socket of a suction pipe, not shown. The fuel injection valve 1 has at an inlet-side 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 element 3 consists of a clamp 8, which is supported 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. 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. 1C ist ersichtlich, daß das Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Stützelements 3 einen runden Querschnitt aufweist. Alternative Formen sind in den Fig. 3C und 4 dargestellt.Out Fig. 1C It can be seen that the embodiment of an inventively designed support member 3 has a round cross-section. Alternative forms are in the FIGS. 3C and 4 shown.

Zwei Laschen 11 stehen in Verbindung mit der Klammer 8 und sorgen für eine federnde Verspannung der Brennstoffverteilerleitung 2 gegen das Brennstoffeinspritzventil 1. Eine detaillierte Darstellung der Klammer 8 ist den Ansichten in den Fig. 3A bis 3C, 4 und 5A bis 5C sowie der nachfolgenden Beschreibung zu entnehmen.Two tabs 11 are in communication with the bracket 8 and provide a resilient tension of the fuel rail 2 against the fuel injector 1. A detailed illustration of the bracket 8 is the views in the Figs. 3A to 3C, 4 and 5A to 5C as well as the following description.

Fig. 2A bis 2D zeigen schematische, teilweise geschnittene Ausschnitte aus dem in Fig. 1A und 1B dargestellten Brennstoffeinspritzsystem im Bereich des Anschlußstutzens 6 des Brennstoffeinspritzventils 1 und der Brennstoffverteilerleitung 2. Fig. 2A to 2D show schematic, partially cut-away sections of the in Fig. 1A and 1B shown fuel injection system in the region of the connection piece. 6 of the fuel injection valve 1 and the fuel distribution pipe 2.

Die Fig. 2A bis 2D stellen dabei verschiedene Möglichkeiten der Abstützung der radialen Kräfte zwischen dem Stützelement 3 und dem Brennstoffeinspritzventil 1 für rund ausgeführte Stützelemente 3 dar.The Fig. 2A to 2D represent different ways of supporting the radial forces between the support member 3 and the fuel injection valve 1 for approximately running support elements 3.

In Fig. 2A ist eine erste, einfachste Ausführungsvariante dargestellt, bei welcher das Stützelement 3 durch ein Führungselement 12, welches beispielsweise der Zylinderkopf sein kann, so geführt ist, daß ein radiales Ausweichen des Stützelements 3 durch den von der Brennstoffverteilerleitung 2 ausgeübten Druck nicht möglich ist.In Fig. 2A is a first, simplest embodiment shown, in which the support member 3 by a guide member 12, which may be, for example, the cylinder head is guided so that a radial deflection of the support member 3 by the force exerted by the fuel manifold 2 pressure is not possible.

Die erfindungsgemäße Möglichkeit besteht in einem Formschluß, wie in Fig. 2B dargestellt. Hierbei erhält das Stützelement 3 eine zumindest teilweise umlaufende Nut 13, welche gemeinsam mit einem an der Schulter 9 des Brennstoffeinspritzventils 1 ausgebildeten Vorsprungs 14 durch Ineinandergreifen ebenfalls dafür sorgt, daß die Laschen 11 des Stützelements 3 nicht radial auswandern können.The possibility according to the invention consists in a positive connection, as in Fig. 2B shown. Here, the support member 3 receives an at least partially circumferential groove 13 which, together with a formed on the shoulder 9 of the fuel injector 1 projection 14 by meshing also ensures that the tabs 11 of the support member 3 can not emigrate radially.

Auch eine nicht erfindungsgemäße Anschrägung der Schulter 9 des Brennstoffeinspritzventils 1 und/oder der Laschen 11 des Stützelements 3 bietet sich zur radialkraftfreien Abstützung an der Schulter 9 des Brennstoffeinspritzventils 1 an. In Fig. 2C ist dabei lediglich die Schulter 9 unter einem Winkel α geneigt, während in Fig. 2D sowohl die Schulter 9 des Brennstoffeinspritzventils 1 als auch die Laschen 11 des Stützelements 3 unter einem vorzugsweise gleich großen Winkel α geneigt sind. Auch durch diese Maßnahme kann ein Auswandern der Laschen 11 unter axialer Kraft verhindert werden. Die in Fig. 2C dargestellte Ausführungsvariante hat dabei den Vorteil der einfachen Herstellbarkeit, wobei das Stützelement 3 unverändert übernommen werden kann.A non-inventive chamfer of the shoulder 9 of the fuel injector 1 and / or the tabs 11 of the support member 3 lends itself to the radial force-free support on the shoulder 9 of the fuel injector 1 at. In Fig. 2C is only the shoulder 9 inclined at an angle α, while in Fig. 2D Both the shoulder 9 of the fuel injection valve 1 and the tabs 11 of the support member 3 are inclined at a preferably equal angle α. Also by this measure, a migration of the tabs 11 can be prevented under axial force. In the Fig. 2C illustrated embodiment has the advantage of ease of manufacture, the support member 3 can be taken unchanged.

Fig. 3A bis 3C und 4 stellen schematische Ansichten und Teilschnitte des in den Fig. 1 und 2 dargestellten Ausführungsbeispiels eines Stützelements 3 in nicht montiertem Zustand dar. Gleiche Bauteile sind in allen Figuren mit übereinstimmenden Bezugszeichen versehen. FIGS. 3A to 3C and 4 represent schematic views and partial sections of the in the Fig. 1 and 2 shown Embodiment of a support member 3 in non-assembled state. Identical components are provided in all figures with matching reference numerals.

Fig. 3A zeigt eine Seitenansicht des Stützelements 3, Fig. 3B eine Vorderansicht, Fig. 3C eine Aufsicht von oben und Fig. 4 eine Aufsicht von oben auf eine alternativ zu Fig. 3C zu sehende weitere Ausführungsvariante. Fig. 3A shows a side view of the support member 3, Fig. 3B a front view, Fig. 3C a top view and Fig. 4 a top view of an alternative to Fig. 3C to see further embodiment.

Fig. 3A zeigt das Stützelement 3 mit der Klammer 8 und den Laschen 11. Die Laschen 11 sind bedingt durch ihre Form und ihren Ansatz an die Klammer 8 so ausgeführt, daß sie unter axialer Belastung plastischelastisch verformt werden können und dadurch eine axiale Kraft in das Brennstoffeinspritzventil 1 einleiten. Wie in Fig. 1B ersichtlich, liegen die Klammern 11 auf der Schulter 9 des Brennstoffeinspritzventils 1 an. Fig. 3A shows the support member 3 with the bracket 8 and the tabs 11. The tabs 11 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 , As in Fig. 1B can be seen, the clamps 11 are on the shoulder 9 of the fuel injection valve 1 at.

Fig. 3B zeigt eine Ansicht auf die geschlitzte Seite des Stützelements 3. Im Bereich der Schlitzung 15 befindet sich im montierten Zustand des Stützelements 3 der elektrische Anschluß 7 des Brennstoffeinspritzventils 1. Fig. 3B shows a view of the slotted side of the support member 3. 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

Fig. 3C und 4 zeigen in gleicher Ansicht in Abströmrichtung betrachtet zwei mögliche Ausführungsvarianten für das Stützelement 3. 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 der 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. FIGS. 3C and 4 In the same view in the outflow direction considered two possible embodiments for the support member 3. In order to prevent the support member 3 radially through the axial force transmission through the fuel rail 2 and thereby to tension of the fuel injector 1 in the cylinder head or bending of the fuel injector 1 and subsequent Malfunction occurs, for example, by jamming the valve needle of the fuel injection valve 1, the support member 3 on the one hand not round, but in a roughly rectangular or square cross-sectional shape, with additional edges 16, which form the conclusion of the clip 8 on both sides of the slits 15, in the direction of the Fuel injection valve 1 are folded 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.

Die in Fig. 4 dargestellte Ausführungsvariante hat den Vorteil einfacher Herstellbarkeit bei hoher Klemmwirkung, während das in Fig. 3C dargestellte Ausführungsbeispiel das Aufbiegen der Kanten wirkungsvoll verhindert.In the Fig. 4 embodiment shown has the advantage of ease of manufacture with high clamping effect, while the in Fig. 3C illustrated embodiment effectively prevents the bending of the edges.

In den Fig. 5A bis 5C ist ein weiteres Ausführungsbeispiel eines Stützelements 3 dargestellt. Dieses weist dabei ringförmige Laschen 11 auf, welche mit der Klammer 8 verbunden sind. Eine Ausnehmung 17 in den ringförmigen Laschen 11 sorgt für eine höhere Elastizität der Laschen 11 und somit für eine größere Toleranz gegenüber axialen Verspannungen. Die Kanten 16 können wie in Fig. 3C oder 4 ausgestaltet sein.In the Figs. 5A to 5C another embodiment of a support member 3 is shown. This has annular tabs 11, which are connected to the bracket 8. A recess 17 in the annular lugs 11 ensures a higher elasticity of the tabs 11 and thus for a greater tolerance to axial tension. The edges 16 can as in 3C or 4 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 resilient tension of the components against each other, not only axial forces can be compensated by the fuel distribution line 2, but also manufacturing tolerances and changes in length due to heating during operation of the internal combustion engine.

Die Erfindung ist auch für Brennstoffeinspritzventile 1 zur Einspritzung in den Brennraum einer selbstzündenden Brennkraftmaschine anwendbar.The invention is also applicable to fuel injection valves 1 for injection into the combustion chamber of a self-igniting internal combustion engine.

Claims (10)

  1. Support element in connection with a fuel injection valve (1), for the mutual support of a fuel injection valve (1) on a fuel distributor line (2),
    with the support element (3) being formed such that the forces acting on the fuel injection valve (1) act only in the axial direction and have no radial component, and
    with the support element (3) having a bracket (8) and lugs (11) formed on the latter, which lugs (11) are supported on a shoulder (9) of the fuel injection valve (1),
    characterized
    in that the lugs (11) form, with the shoulder (9), a form-fitting connection in order to prevent a radial migration of the lugs (11) of the support element (3), and
    in that the support element (3) has, at least partially, a groove for the form-fitting connection.
  2. Support element according to Claim 1,
    characterized
    in that the bracket (8) is supported on a shoulder (10) of the fuel distributor line (2).
  3. Support element according to Claim 1 or 2,
    characterized
    in that the bracket (8) has a slot (15) in the region of an electric supply line (7) of the fuel injection valve (1).
  4. Support element according to one of Claims 1 to 3,
    characterized
    in that the bracket (8) is produced from spring steel by means of punching.
  5. Support element according to one of Claims 1 to 4,
    characterized
    in that the bracket (8) has edges (16) which, bent radially inwards, bear against the fuel injection valve (1).
  6. Support element according to one of Claims 1 to 5,
    characterized
    in that the support element (3) has a rectangular or quadratic cross-sectional shape.
  7. Support element according to one of Claims 1 to 6,
    characterized
    in that the fuel injection valve (1) is braced by means of the support element (3) against the fuel distributor line (2).
  8. Support element according to one of Claims 1 to 7,
    characterized
    in that the support element (3) is guided through the cylinder head (12) of the internal combustion engine.
  9. Support element according to one of Claims 1 to 8,
    characterized
    in that the lugs (11) of the support element (3) have an encircling groove (13).
  10. Support element according to Claim 9,
    characterized
    in that the groove (13) engages behind a projection (14) which is formed on a shoulder (9) of the fuel injection valve (1).
EP03750336A 2002-12-04 2003-09-10 Supporting element Expired - Lifetime EP1570171B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256668 2002-12-04
DE10256668A DE10256668A1 (en) 2002-12-04 2002-12-04 support element
PCT/DE2003/003008 WO2004051074A1 (en) 2002-12-04 2003-09-10 Supporting element

Publications (2)

Publication Number Publication Date
EP1570171A1 EP1570171A1 (en) 2005-09-07
EP1570171B1 true EP1570171B1 (en) 2008-04-02

Family

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EP03750336A Expired - Lifetime EP1570171B1 (en) 2002-12-04 2003-09-10 Supporting element

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US (1) US7540273B2 (en)
EP (1) EP1570171B1 (en)
JP (1) JP4291273B2 (en)
KR (1) KR101032261B1 (en)
DE (2) DE10256668A1 (en)
WO (1) WO2004051074A1 (en)

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Also Published As

Publication number Publication date
KR101032261B1 (en) 2011-05-06
KR20050085342A (en) 2005-08-29
EP1570171A1 (en) 2005-09-07
WO2004051074A1 (en) 2004-06-17
JP2006509143A (en) 2006-03-16
US20060266892A1 (en) 2006-11-30
DE50309555D1 (en) 2008-05-15
US7540273B2 (en) 2009-06-02
DE10256668A1 (en) 2004-07-29
JP4291273B2 (en) 2009-07-08

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