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EP2841760B1 - Arrangement with a fuel distributer and multiple fuel injection valves - Google Patents

Arrangement with a fuel distributer and multiple fuel injection valves Download PDF

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Publication number
EP2841760B1
EP2841760B1 EP13714602.3A EP13714602A EP2841760B1 EP 2841760 B1 EP2841760 B1 EP 2841760B1 EP 13714602 A EP13714602 A EP 13714602A EP 2841760 B1 EP2841760 B1 EP 2841760B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
damping
composite element
outer side
damping composite
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.)
Active
Application number
EP13714602.3A
Other languages
German (de)
French (fr)
Other versions
EP2841760A1 (en
Inventor
Andreas Rehwald
Matthias Maess
Goekhan Guengoer
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
Priority to PL13714602T priority Critical patent/PL2841760T3/en
Publication of EP2841760A1 publication Critical patent/EP2841760A1/en
Application granted granted Critical
Publication of EP2841760B1 publication Critical patent/EP2841760B1/en
Active 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M2200/09—Fuel-injection apparatus having means for reducing noise
    • 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
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, 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
    • F02M2200/80—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
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws

Definitions

  • the invention relates to an arrangement, in particular a fuel injection system for high-pressure injection in internal combustion engines, with a fuel distributor and a plurality of fuel injection valves. Specifically, the invention relates to the field of fuel injection systems for mixture-compression, spark-ignition internal combustion engines, in which a direct injection of the fuel into combustion chambers takes place.
  • a fuel rail and a plurality of fuel injectors disposed on the fuel rail are known.
  • a collar-shaped element with tongues on both sides is joined around an upper fuel inlet nozzle.
  • a retaining clip is provided which engages around a cylindrical body of an injector connector from above along a longitudinal axis, wherein the tongues of the collar engage in openings of the retaining clip. This results in an attachment of the fuel injection valve to the cylindrical body of the injector port.
  • the from the EP 2 151 572 A2 known embodiment has the disadvantage that the fuel rail can be excited in operation to oscillations in the audible frequency range. This happens especially by noise sources in the fuel injection valves.
  • the structure-borne sound propagates from the fuel injection valves via the injector connections, the fuel distributor rail and the rail holders, if necessary, to the mounting structure, from where disturbing noises are radiated. Under certain circumstances, these disturbing noises can even penetrate into the interior of the vehicle.
  • the mounting structure to which the fuel rail is attached this may be, for example, the cylinder head.
  • the arrangement according to the invention with the features of claim 1 has the advantage that an improved vibration damping is ensured. Specifically, there is the advantage that vibrations, which arise in particular in the field of fuel injection valves, can be effectively damped with respect to a transmission to the fuel distributor and disturbing noises are reduced.
  • the arrangement is suitable for internal combustion engines for gasoline direct injection.
  • the fuel distributor can in this case be configured in particular as a fuel distributor strip.
  • the fuel distributor serves to store high-pressure fuel and to distribute the fuel to the fuel injection valves, in particular high-pressure injection valves.
  • the fuel injection valves inject the fuel necessary for the combustion process under high pressure into the respective combustion chamber.
  • the fuel is in this case compressed via a high-pressure pump and quantity-controlled conveyed via a high-pressure line in the fuel distributor.
  • the arrangement may be configured in an advantageous manner as a fuel injection system.
  • the fuel distributor can be suitably connected to a mounting structure.
  • the mounting structure may be the cylinder head of the internal combustion engine.
  • the fuel injectors can be hung on the cups, so to speak. In this case, in particular a gimbal attachment to the cups is possible.
  • the headband may be configured in particular as a U-shaped headband. About the headband quasi-static forces can be transferred for attachment. This also ensures that the relative deflection of the fuel injection valves with respect to the cups under the action of operating forces remains below a defined limit to protect sealing elements, such as an O-ring seal from wear.
  • the damping composite element furthermore achieves a vibration-related decoupling and damping between the fuel injection valves and the fuel distributor, the other requirements still being guaranteed.
  • the attachment via a headband and an associated damping composite element is provided in each fuel injection valve.
  • the damping composite element between the bracket portion of the retaining clip and the outside of the fuel injection valve is arranged.
  • a recess is configured, in which the bracket portion of the retaining clip is inserted.
  • a positive connection between the bracket section and the cup is thereby achieved in the mounted state.
  • an indirect investment is realized via the damping composite element.
  • vibrations are damped.
  • the fuel injection valve can be excited to vibrate due to the rapid repetitive activation.
  • a transmission of these vibrations to the cup is damped by the damping composite element.
  • a support surface is formed, which is inclined in an axial cross section with respect to the longitudinal axis of the fuel injection valve, that a first outer side of the damping composite element cooperates with the support surface on the first outer side of the fuel injection valve and that one of the first outer side facing away from the second outer side of the damping composite element with the strap portion of the retaining clip cooperates.
  • the outer side of the fuel injection valve is conical and that the first outer side of the damping composite element bears against the conical outer side of the fuel injection valve.
  • the damping composite element may in this case have a flat or rectangular profile.
  • the largest possible possible contact of the damping composite element is achieved on the outside of the fuel injection valve. This allows a more uniform loading of the damping layer, resulting in a good damping effect.
  • this can be advantageously determined the position of the damping element relative to the fuel injection valve. This simplifies the assembly and the damping effect is ensured over the lifetime. A tolerance compensation with respect to the headband is thereby ensured.
  • the bow section of the retaining clip has an elliptical or circular cross section. It is also advantageous that the second outer side of the damping composite element at least partially rests against the bracket section. As a result, the position of the damping composite element with respect to the bracket portion can be determined. In operation, this prevents a shift of the damping composite element relative to the bracket portion of the retaining clip. In addition, a point or linear load and thus surface pressure between the damping composite element and the headband is avoided. Furthermore, a tolerance compensation for the positioning of the fuel injection valve is made possible relative to the headband and the damping composite element.
  • the damping composite element has at least one metal layer which is connected to the damping layer.
  • the damping layer may for example be formed of a viscoelastic material.
  • the metal layer may be formed of a metal sheet.
  • the damping layer may be suitably connected to the metal layer.
  • the damping layer is directly connected to the metal layer. In this case, a connection by vulcanization is possible.
  • the damping layer is based on a rubber material.
  • the term rubber material is to be understood generally and includes not only a natural rubber but also synthetic rubber materials.
  • At least one damping layer is designed as an external damping layer.
  • the outer damping layer can in this case lie directly against the fuel injector or directly to the bracket portion of the retaining clip.
  • An embodiment of the damping composite element with two outer damping layers which form the first outer side and the second outer side of the damping composite element is also possible.
  • At least one further metal layer is provided, and that at least one damping layer is arranged between the metal layer and the further metal layer.
  • at least one damping layer is arranged between the metal layer and the further metal layer.
  • the damping composite element is designed as a partial annular damping composite element, that the damping composite element has end sections and an arc section connecting the end sections, and that the damping composite element is configured with a greater width at its end sections than at its arc section.
  • the end portions thus broad contact areas can be guaranteed, where an effective damping is achieved.
  • the arc section allows a high degree of flexibility of the damping composite element, since this is made comparatively narrow.
  • a U-shaped headband can thus be achieved on the two strap portions of the retaining clip damping over the wide end portions, while the narrow arc portion of the damping composite element allows tolerance compensation.
  • Fig. 1 shows an arrangement 1 with a fuel distributor 2 and a plurality of fuel injection valves 3, 4 in a schematic sectional view.
  • the arrangement 1 can serve in particular as a fuel injection system for high-pressure injection in internal combustion engines.
  • the fuel distributor 2 can be attached to a mounting structure 7, in particular a cylinder head 7, at predetermined attachment points via holders 5, 6 or the like.
  • the fuel distributor 2 is designed in this embodiment as a fuel distributor strip 2 with an elongated, in particular tubular, base body.
  • a high-pressure line 8 is connected, is guided through the fuel in the high pressure fuel in the fuel distributor 2 during operation.
  • the fuel distributor 2 has a plurality of cups 9, 10. On the cup 9, the fuel injection valve 3 is arranged. On the cup 10, the fuel injection valve 4 is arranged. The fuel injection valves 3, 4 are not directly, but only indirectly connected to the cups 9, 10 of the fuel distributor 2. The mechanical power transmission takes place in each case by means of a damping composite element 11, 12. In the Fig. 1 is schematically illustrated the power transmission path. The structural design of the connection between the fuel distributor 2 and the fuel injection valves 3, 4th according to the first embodiment is described below with reference to the Fig. 2 described in more detail.
  • Fig. 2 shows an excerpt, schematic section of the in Fig. 1 illustrated arrangement 1 according to the first embodiment.
  • the fuel injection valve 3 is partially inserted into the cup 9.
  • a longitudinal axis 15 of the fuel injection valve 3 in this case preferably extends centrally through the cup 9.
  • a retaining clip 16 is mounted on the cup 9 in the inserted state.
  • a bracket portion 17 of the retaining clip 16 is then between an inner side 18 of the cup 9 and without direct contact with an outer side 19 of the fuel injection valve 3.
  • the damping composite element 11 between the bracket portion 17 of the retaining clip 16 and the outer side 19 of the fuel injection valve third arranged.
  • the damping composite element 11 has metal layers 20, 21 and a damping layer 22.
  • the damping layer 22 is in this case arranged between the metal layers 20, 21.
  • the damping layer 22 may in this case be connected to the metal layers 20, 21.
  • the damping layer 22 is advantageously protected from the environment and against abrasion.
  • a support surface 25 is configured on the outer side 19 of the fuel injection valve 3.
  • the support surface 25 is inclined in an axial cross section with respect to the longitudinal axis 15 of the fuel injection valve 3.
  • the support surface 25 may be configured as a conical support surface 25.
  • the damping composite element 11 has a first outer side 26 and a second outer side 27, which are remote from each other.
  • the first outer side 26 of the damping composite element 11 cooperates with the support surface 25 of the outer side 19 of the fuel injection valve 3.
  • the damping composite element 11 lies with its first outer side 26 flat against the support surface 25 of the fuel injection valve 3.
  • a local positioning of the damping composite element 11 is ensured relative to the fuel injection valve 3.
  • the second outer side 27 of the damping composite element 11 cooperates with the bow section 17 of the retaining clip 16.
  • the bracket portion 17 of the retaining clip 16 has an at least approximately circular cross-section.
  • the cross section of the bracket portion 17 may also be configured at least approximately elliptical.
  • On the inside 18 of the Cup 9 is a recess 28 configured, in which the bracket portion 17 of the retaining clip 16 is inserted.
  • Fig. 3 shows the in Fig. 2 illustrated section of the arrangement 1 with the fuel injection valve 3, the cup 9 of the fuel distributor 2, the headband 16 and the damping composite element 11 according to a second embodiment.
  • the damping composite element 11 is arranged between the bow section 17 of the retaining clip 16 and the outer side 19 of the fuel injection valve 3 such that the damping composite element 11 is supported in part on the support surface 25 and partly on a cylinder jacket-shaped part 29 of the outer side 19.
  • the damping composite element 11 is designed bent in profile seen.
  • the second outer side 27 of the damping composite element 11 is namely at least partially against the strap portion 17 of the retaining clip 16.
  • Fig. 4 shows that in Fig. 2 illustrated damping composite element 11 in a schematic sectional view according to a third embodiment.
  • the damping composite element 11 consists of a metal layer 20 and a damping layer 22.
  • the damping layer 22 is connected to the metal layer 20.
  • the first outer side 26 of the damping composite element 11 may be provided on the cushioning layer 22 while the second outer side 27 is provided on the metal layer 20.
  • the damping layer 22 abuts against the support surface 25 of the outer side 19 of the fuel injection valve 3.
  • the damping composite element 11 can also be designed bent, as it is based on the Fig. 3 is illustrated.
  • Fig. 5 shows that in Fig. 4 illustrated damping composite element 11 in a schematic sectional view according to a fourth embodiment.
  • the damping composite element 11 has a metal layer 20 and damping layers 22, 23.
  • the first outer side 26 of the damping composite element 11 is formed on the damping layer 22.
  • the second outer side 27 is formed on the damping layer 23.
  • the damping layers 22, 23 are outside, while the metal layer 20 is located inside.
  • Fig. 6 shows that in Fig. 4 illustrated damping composite element 11 in a schematic sectional view according to a fifth embodiment.
  • the damping composite element 11 consists of two metal layers 20, 21 and two damping layers 22, 23.
  • the damping layer 23 is located between the metal layers 20, 21.
  • the metal layer 20 is located between the damping layers 22, 23.
  • the damping layer 22 serves as an external Damping layer 22, while the damping layer 23 serves as an internal damping layer 23.
  • the metal layer 21 serves as the outer metal layer 21, while the metal layer 20 serves as the inner metal layer 20.
  • the first outer side 26 may be formed on the damping layer 22.
  • the second outer side 27 is formed on the metal layer 21 in this case.
  • a reverse embodiment is also conceivable.
  • damping composite elements 11 which in the 4 to 6 are shown in profile, as it is also based on the Fig. 2 and 3 the case is. Starting from this profile, numerous modifications are conceivable. In particular, bending or the configuration of bending edge at one or more locations and / or about one or more axes are possible. A further adaptation of the geometry of the damping composite element 11 is based on Fig. 7 described in more detail.
  • Fig. 7 shows the cup 9, the headband 16 and the damping composite element 11 of an arrangement 1 in a partial, schematic sectional view accordingly a sixth embodiment.
  • the headband 16 is designed as a U-shaped headband 16.
  • the headband 16 has bow sections 17, 17A.
  • the cup 9 has suitable recesses 30, 31, 32, 33, through which the headband 16 can be pushed into the cup 9 to a certain extent.
  • the recesses 30 to 33 may be realized for example by drilling.
  • the two strap sections 17, 17A are preferably oriented parallel to one another.
  • the damping composite element 11 is configured in this embodiment as a partial annular damping composite element 11.
  • the damping composite element 11 has end sections 34, 35.
  • the damping composite element 11 has an arc portion 36 which connects the end portions 34, 35 with each other.
  • the damping composite element 11 is configured at its end portions 34, 35 with a greater width than at its arc portion 36.
  • the end portions 34, 35 are thus configured as widened end portions 34, 35, the wide bearing areas 34, 35 for one hand, the fuel injection valve 3 and the other Ironing sections 17, 17A form.
  • the arc portion 36 forms in comparison to a narrow arc portion 36 as a connecting part (spine).
  • a damping composite element 11 can be selected in a adapted to the particular application embodiment.
  • one or more metal layers 20, 21 and one or more damping layers 22, 23 are provided.
  • an annular or semi-annular configuration is possible.
  • the damping layers 22, 23 may be configured as viscoelastic damping layers 22, 23.
  • the damping layers 22, 23 are preferably designed as thin viscoelastic damping layers 22, 23.
  • the respective intermediate damping layer 22, 23 is dynamically stressed, so that a high proportion of vibration energy is dissipated by the material damping ,
  • the damping layer 22, 23 may be formed of an elastomer here.
  • the dissipation of body sound energy thus leads to a damping of vibration modes of the fuel injection valves 3, 4 and the fuel distributor 2 and thus to a reduction of all body sound components that are transmitted through this layer.
  • This property enables a decoupling or isolation between the fuel injection valves 3, 4 and the fuel distributor 2. Pure metal contacts, via a structure-borne sound transmission would be possible, thus prevented from the outset become. Because the mechanical forces are always transmitted through a damping layer 22, 23.
  • the properties of the damping layer 22, 23, such as a thickness or material-specific properties, may be adjusted with respect to some optimization parameters. Optimization parameters here are above all the frequency contents to be damped and the temperature, in particular the operating temperature.
  • Noises of the fuel distributor 2 are reduced.
  • a relatively rigid connection of the fuel injection valves 3, 4 can be maintained despite the decoupling.
  • the compliance for the fuel injection valves 3, 4 increases only slightly, all functional requirements, in particular a small relative movement, and strength requirements, in particular the wear of an O-ring, are met.
  • acoustic, functional and strength requirements resulting from the design of the fuel injection valves 3, 4 and the fuel distributor 2 can be simultaneously satisfied.
  • the noise damping can be realized in an advantageous manner with a fixation by means of retaining bracket 16.
  • damping layers 22, 23 can be firmly vulcanized as elastomer layers 22, 23 between the metal layers 20, 21 and thus protected from abrasion.
  • the assembly effort is low, since the damping composite elements 11, 12 only have to be inserted before the assembly of the fuel injection valves 3, 4.
  • the decoupling can be realized on a line-connected design of the fuel distributor 2 by the damping composite elements 11, 12 are used at the joint between the suspended fuel injection valves 3, 4 and a functional block for the fuel distributor 2.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Anordnung, insbesondere eine Brennstoffeinspritzanlage zur Hochdruckeinspritzung bei Brennkraftmaschinen, mit einem Brennstoffverteiler und mehreren Brennstoffeinspritzventilen. Speziell betrifft die Erfindung das Gebiet der Brennstoffeinspritzanlagen für gemischverdichtende, fremdgezündete Brennkraftmaschinen, bei denen eine direkte Einspritzung des Brennstoffs in Brennräume erfolgt.The invention relates to an arrangement, in particular a fuel injection system for high-pressure injection in internal combustion engines, with a fuel distributor and a plurality of fuel injection valves. Specifically, the invention relates to the field of fuel injection systems for mixture-compression, spark-ignition internal combustion engines, in which a direct injection of the fuel into combustion chambers takes place.

Aus der EP 2 151 572 A2 sind eine Brennstoffverteilerleiste und mehrere an der Brennstoffverteilerleiste angeordnete Brennstoffeinspritzventile bekannt. Zur Verbindung der Brennstoffeinspritzventile mit der Brennstoffverteilerleiste ist um einen oberen Brennstoffeinlassstutzen ein kragenförmiges Element mit beidseitigen Zungen gefügt. Außerdem ist ein Haltebügel vorgesehen, der einen zylindrischen Körper eines Injektoranschlusses von oben entlang einer Längsachse umgreift, wobei die Zungen des Kragens in Öffnungen des Haltebügels eingreifen. Dadurch ergibt sich eine Befestigung des Brennstoffeinspritzventils an dem zylindrischen Körper des Injektoranschlusses.From the EP 2 151 572 A2 For example, a fuel rail and a plurality of fuel injectors disposed on the fuel rail are known. To connect the fuel injection valves to the fuel distributor strip, a collar-shaped element with tongues on both sides is joined around an upper fuel inlet nozzle. In addition, a retaining clip is provided which engages around a cylindrical body of an injector connector from above along a longitudinal axis, wherein the tongues of the collar engage in openings of the retaining clip. This results in an attachment of the fuel injection valve to the cylindrical body of the injector port.

Die aus der EP 2 151 572 A2 bekannte Ausgestaltung hat den Nachteil, dass die Brennstoffverteilerleiste im Betrieb zu Schwingungen im hörbaren Frequenzbereich angeregt werden kann. Dies geschieht besonders durch Geräuschquellen in den Brennstoffeinspritzventilen. Der Körperschall breitet sich hierbei von den Brennstoffeinspritzventilen über die Injektoranschlüsse, die Brennstoffverteilerleiste und die Railhalter gegebenenfalls auch auf die Anbaustruktur aus, von wo störende Geräusche abgestrahlt werden. Diese störenden Geräusche können unter Umständen sogar bis ins Innere des Fahrzeuges dringen. Die Anbaustruktur, an der die Brennstoffverteilerleiste befestigt ist, kann hierbei beispielsweise der Zylinderkopf sein.The from the EP 2 151 572 A2 known embodiment has the disadvantage that the fuel rail can be excited in operation to oscillations in the audible frequency range. This happens especially by noise sources in the fuel injection valves. The structure-borne sound propagates from the fuel injection valves via the injector connections, the fuel distributor rail and the rail holders, if necessary, to the mounting structure, from where disturbing noises are radiated. Under certain circumstances, these disturbing noises can even penetrate into the interior of the vehicle. The mounting structure to which the fuel rail is attached, this may be, for example, the cylinder head.

Aus der US 7,334,571 B1 ist bereits eine Anordnung, insbesondere Brennstoffeinspritzanlage zur Hochdruckeinspritzung bei Brennkraftmaschinen, bekannt, die einen Brennstoffverteiler und mehrere Brennstoffeinspritzventile umfasst, wobei jedes der Brennstoffeinspritzventile an einer Tasse des Brennstoffverteilers angeordnet ist und wobei zumindest eines der Brennstoffeinspritzventile durch einen Schnappring an der zugeordneten Tasse befestigt ist. Den Sitz für das Brennstoffeinspritzventil bildet ein scheibenförmiges Element, welches auf dem Schnappring ebenfalls in der Tasse eingebracht aufliegt. Der scheibenförmige Ventilsitz besteht vorzugsweise aus einem Elastomermaterial; allerdings werden auch alternative Materialien genannt, u.a. "Composites".From the US 7,334,571 B1 is already an arrangement, in particular fuel injection system for high-pressure injection in internal combustion engines, known comprising a fuel distributor and a plurality of fuel injection valves, wherein each of the fuel injection valves is disposed on a cup of the fuel distributor and wherein at least one of the fuel injection valves is secured by a snap ring on the associated cup. The seat for the fuel injection valve forms a disk-shaped element which rests on the snap ring also introduced in the cup. The disc-shaped valve seat is preferably made of an elastomeric material; however, alternative materials are mentioned, including "composites".

Offenbarung der ErfindungDisclosure of the invention

Die erfindungsgemäße Anordnung mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass eine verbesserte Schwingungsdämpfung gewährleistet ist. Speziell ergibt sich der Vorteil, dass Schwingungen, die insbesondere im Bereich der Brennstoffeinspritzventile entstehen, in Bezug auf eine Übertragung auf den Brennstoffverteiler wirkungsvoll gedämpft werden können und störende Geräusche reduziert werden.The arrangement according to the invention with the features of claim 1 has the advantage that an improved vibration damping is ensured. Specifically, there is the advantage that vibrations, which arise in particular in the field of fuel injection valves, can be effectively damped with respect to a transmission to the fuel distributor and disturbing noises are reduced.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen der im Anspruch 1 angegebenen Anordnung möglich.The measures listed in the dependent claims advantageous developments of the arrangement specified in claim 1 are possible.

Speziell eignet sich die Anordnung für Brennkraftmaschinen zur Benzindirekteinspritzung. Der Brennstoffverteiler kann hierbei insbesondere als Brennstoffverteilerleiste ausgestaltet sein. Der Brennstoffverteiler dient zum Speichern von unter hohem Druck stehenden Brennstoff und zur Verteilung des Brennstoffs auf die Brennstoffeinspritzventile, insbesondere Hochdruckeinspritzventile. Die Brennstoffeinspritzventile spritzen den zum Verbrennungsvorgang notwendigen Brennstoff unter hohem Druck in den jeweiligen Verbrennungsraum ein. Der Brennstoff wird hierbei über eine Hochdruckpumpe verdichtet und mengengesteuert über eine Hochdruckleitung in den Brennstoffverteiler gefördert.Specifically, the arrangement is suitable for internal combustion engines for gasoline direct injection. The fuel distributor can in this case be configured in particular as a fuel distributor strip. The fuel distributor serves to store high-pressure fuel and to distribute the fuel to the fuel injection valves, in particular high-pressure injection valves. The fuel injection valves inject the fuel necessary for the combustion process under high pressure into the respective combustion chamber. The fuel is in this case compressed via a high-pressure pump and quantity-controlled conveyed via a high-pressure line in the fuel distributor.

Die Anordnung kann in vorteilhafter Weise als Brennstoffeinspritzanlage ausgestaltet sein. Hierbei kann der Brennstoffverteiler auf geeignete Weise mit einer Anbaustruktur verbunden werden. Bei der Anbaustruktur kann es sich um den Zylinderkopf der Brennkraftmaschine handeln. Es ist jedoch auch eine Anbindung über Distanzhülsen oder über weitere Verbindungselemente möglich.The arrangement may be configured in an advantageous manner as a fuel injection system. Here, the fuel distributor can be suitably connected to a mounting structure. The mounting structure may be the cylinder head of the internal combustion engine. However, it is also possible to connect via spacers or other connecting elements.

Die Brennstoffeinspritzventile können an den Tassen gewissermaßen aufgehängt werden. Hierbei ist insbesondere eine kardanische Befestigung an den Tassen möglich. Der Haltebügel kann insbesondere als U-förmiger Haltebügel ausgestaltet sein. Über den Haltebügel können quasistatische Kräfte zur Befestigung übertragen werden. Hierbei wird auch gewährleistet, dass die relative Auslenkung der Brennstoffeinspritzventile gegenüber den Tassen unter Einwirkung von Betriebskräften unter einem definierten Grenzwert bleibt, um Dichtelemente, wie beispielsweise eine O-Ringdichtung vor Verschleiß zu schützen.The fuel injectors can be hung on the cups, so to speak. In this case, in particular a gimbal attachment to the cups is possible. The headband may be configured in particular as a U-shaped headband. About the headband quasi-static forces can be transferred for attachment. This also ensures that the relative deflection of the fuel injection valves with respect to the cups under the action of operating forces remains below a defined limit to protect sealing elements, such as an O-ring seal from wear.

Durch das Dämpfungsverbundelement wird darüber hinaus eine schwingungstechnische Entkopplung und Dämpfung zwischen den Brennstoffeinspritzventilen und dem Brennstoffverteiler erzielt, wobei die sonstigen Anforderungen weiterhin gewährleistet sind.The damping composite element furthermore achieves a vibration-related decoupling and damping between the fuel injection valves and the fuel distributor, the other requirements still being guaranteed.

Vorzugsweise ist die Befestigung über einen Haltebügel und ein zugeordnetes Dämpfungsverbundelement bei jedem Brennstoffeinspritzventil vorgesehen.Preferably, the attachment via a headband and an associated damping composite element is provided in each fuel injection valve.

In vorteilhafter Weise ist das Dämpfungsverbundelement zwischen dem Bügelabschnitt des Haltebügels und der Außenseite des Brennstoffeinspritzventils angeordnet. Hierbei ist es ferner vorteilhaft, dass an der Innenseite der Tasse eine Ausnehmung ausgestaltet ist, in die der Bügelabschnitt des Haltebügels eingefügt ist. In Richtung einer Längsachse des Brennstoffeinspritzventils wird hierdurch im montierten Zustand eine formschlüssige Verbindung zwischen dem Bügelabschnitt und der Tasse erzielt. Anstelle einer direkten Anlage des Brennstoffeinspritzventils an dem Bügelabschnitt des Haltebügels ist eine mittelbare Anlage über das Dämpfungsverbundelement realisiert. Im Betrieb auftretende Schwingungen werden dadurch gedämpft. Insbesondere kann das Brennstoffeinspritzventil aufgrund der schnell wiederholten Ansteuerung zu Schwingungen angeregt werden. Eine Übertragung dieser Schwingungen auf die Tasse wird durch das Dämpfungsverbundelement gedämpft. Somit erfolgt eine Bedämpfung der auf den Brennstoffverteiler übertragenen Schwingungen und es kann eine Geräuschreduktion erzielt werden.Advantageously, the damping composite element between the bracket portion of the retaining clip and the outside of the fuel injection valve is arranged. Here, it is also advantageous that on the inside of the cup a recess is configured, in which the bracket portion of the retaining clip is inserted. In the direction of a longitudinal axis of the fuel injection valve, a positive connection between the bracket section and the cup is thereby achieved in the mounted state. Instead of a direct contact of the fuel injection valve to the bracket portion of the retaining clip an indirect investment is realized via the damping composite element. During operation occurring vibrations are damped. In particular, the fuel injection valve can be excited to vibrate due to the rapid repetitive activation. A transmission of these vibrations to the cup is damped by the damping composite element. Thus, there is a damping of the vibrations transmitted to the fuel distributor and a noise reduction can be achieved.

Ferner ist es vorteilhaft, dass an der Außenseite des Brennstoffeinspritzventils eine Stützfläche ausgestaltet ist, die in einem axialen Querschnitt bezüglich der Längsachse des Brennstoffeinspritzventils geneigt ist, dass eine erste Außenseite des Dämpfungsverbundelements mit der Stützfläche an der ersten Außenseite des Brennstoffeinspritzventils zusammen wirkt und dass eine von der ersten Außenseite abgewandte zweite Außenseite des Dämpfungsverbundelements mit dem Bügelabschnitt des Haltebügels zusammen wirkt. Ferner ist es vorteilhaft, dass die Außenseite des Brennstoffeinspritzventils konisch ausgestaltet ist und dass die erste Außenseite des Dämpfungsverbundelements an der konischen Außenseite des Brennstoffeinspritzventils anliegt. Das Dämpfungsverbundelement kann hierbei ein flaches beziehungsweise rechteckiges Profil aufweisen. Hierdurch wird eine möglichst großflächige Anlage des Dämpfungsverbundelements an der Außenseite des Brennstoffeinspritzventils erzielt. Dies ermöglicht eine gleichmäßigere Beanspruchung der Dämpfungsschicht, wodurch sich eine gute Dämpfungswirkung ergibt. Außerdem kann hierdurch die Position des Dämpfungselements relativ zu dem Brennstoffeinspritzventil vorteilhaft festgelegt werden. Dadurch vereinfacht sich die Montage und die Dämpfungswirkung bleibt über die Lebensdauer gewährleistet. Auch ein Toleranzausgleich gegenüber dem Haltebügel ist hierdurch gewährleistet.Furthermore, it is advantageous that on the outer side of the fuel injection valve, a support surface is formed, which is inclined in an axial cross section with respect to the longitudinal axis of the fuel injection valve, that a first outer side of the damping composite element cooperates with the support surface on the first outer side of the fuel injection valve and that one of the first outer side facing away from the second outer side of the damping composite element with the strap portion of the retaining clip cooperates. Further, it is advantageous that the outer side of the fuel injection valve is conical and that the first outer side of the damping composite element bears against the conical outer side of the fuel injection valve. The damping composite element may in this case have a flat or rectangular profile. As a result, the largest possible possible contact of the damping composite element is achieved on the outside of the fuel injection valve. This allows a more uniform loading of the damping layer, resulting in a good damping effect. In addition, this can be advantageously determined the position of the damping element relative to the fuel injection valve. This simplifies the assembly and the damping effect is ensured over the lifetime. A tolerance compensation with respect to the headband is thereby ensured.

Erfindungsgemäß ist vorgesehen, dass der Bügelabschnitt des Haltebügels einen elliptischen oder kreisförmigen Querschnitt aufweist. Vorteilhaft ist es auch, dass die zweite Außenseite des Dämpfungsverbundelements zumindest teilweise an dem Bügelabschnitt anliegt. Hierdurch kann die Position des Dämpfungsverbundelements bezüglich des Bügelabschnitts festgelegt werden. Im Betrieb wird hierdurch eine Verschiebung des Dämpfungsverbundelements relativ zu dem Bügelabschnitt des Haltebügels vermieden. Außerdem wird eine punkt- beziehungsweise linienförmige Belastung und somit Flächenpressung zwischen dem Dämpfungsverbundelement und dem Haltebügel vermieden. Ferner wird ein Toleranzausgleich für die Positionierung des Brennstoffeinspritzventils relativ zu dem Haltebügel und dem Dämpfungsverbundelement ermöglicht.According to the invention, it is provided that the bow section of the retaining clip has an elliptical or circular cross section. It is also advantageous that the second outer side of the damping composite element at least partially rests against the bracket section. As a result, the position of the damping composite element with respect to the bracket portion can be determined. In operation, this prevents a shift of the damping composite element relative to the bracket portion of the retaining clip. In addition, a point or linear load and thus surface pressure between the damping composite element and the headband is avoided. Furthermore, a tolerance compensation for the positioning of the fuel injection valve is made possible relative to the headband and the damping composite element.

Vorteilhaft ist es, dass eine mechanische Kraftübertragung über die mechanische Befestigung zwischen dem Brennstoffeinspritzventil und der zugeordneten Tasse stets über die Dämpfungsschicht des Dämpfungsverbundelements erfolgt. Hierdurch ist eine wirksame Dämpfung erzielt, wobei insbesondere ein direkter Kontakt von beispielsweise Metall auf Metall verhindert ist.It is advantageous that a mechanical power transmission always takes place via the mechanical fastening between the fuel injection valve and the associated cup via the damping layer of the damping composite element. As a result, an effective damping is achieved, wherein in particular direct contact of, for example, metal on metal is prevented.

Vorteilhaft ist es auch, dass das Dämpfungsverbundelement zumindest eine Metallschicht aufweist, die mit der Dämpfungsschicht verbunden ist. Die Dämpfungsschicht kann beispielsweise aus einem viskoelastischen Material gebildet sein. Die Metallschicht kann aus einem Metallblech gebildet sein. Die Dämpfungsschicht kann auf geeignete Weise mit der Metallschicht verbunden sein. Vorzugsweise ist die Dämpfungsschicht direkt mit der Metallschicht verbunden. Hierbei ist eine Verbindung durch Vulkanisieren möglich. Hierfür ist es vorteilhaft, dass die Dämpfungsschicht auf einem Gummiwerkstoff basiert. Der Begriff des Gummiwerkstoffs ist hierbei allgemein zu verstehen und umfasst neben einem Naturkautschuk auch synthetische Gummiwerkstoffe.It is also advantageous that the damping composite element has at least one metal layer which is connected to the damping layer. The damping layer may for example be formed of a viscoelastic material. The metal layer may be formed of a metal sheet. The damping layer may be suitably connected to the metal layer. Preferably, the damping layer is directly connected to the metal layer. In this case, a connection by vulcanization is possible. For this purpose, it is advantageous that the damping layer is based on a rubber material. The term rubber material is to be understood generally and includes not only a natural rubber but also synthetic rubber materials.

Durch den Einsatz des Dämpfungsverbundelements an der Schnittstelle zwischen der Tasse und dem Brennstoffeinspritzventil wird eine Entkopplung beziehungsweise Isolation der am Brennstoffeinspritzventil bestehenden Geräuschquellen gegenüber dem Brennstoffverteiler erzielt. In der Folge werden dadurch auch vom Brennstoffverteiler weniger Körperschallanteile in einen Zylinderkopf oder eine gegebenenfalls vorgesehene sonstige Anbaustruktur übertragen. In Folge dieser beiden Wirkungen wird die Schallabstrahlung und Schallübertragung von der Anordnung auf den Motor reduziert.Through the use of the damping composite element at the interface between the cup and the fuel injection valve, a decoupling or isolation of the fuel injection valve existing noise sources is achieved with respect to the fuel distributor. As a result, less body sound components are also transferred from the fuel distributor into a cylinder head or any other mounting structure provided. As a result of these two effects, the sound radiation and sound transmission from the assembly to the engine is reduced.

Vorteilhaft ist es auch, dass zumindest eine Dämpfungsschicht als außenliegende Dämpfungsschicht ausgestaltet ist. Die außenliegende Dämpfungsschicht kann hierbei direkt an dem Brennstoffeinspritzventil oder direkt an dem Bügelabschnitt des Haltebügels anliegen. Auch eine Ausgestaltung des Dämpfungsverbundelements mit zwei außenliegenden Dämpfungsschichten, die die erste Außenseite und die zweite Außenseite des Dämpfungsverbundelements bilden, ist möglich.It is also advantageous that at least one damping layer is designed as an external damping layer. The outer damping layer can in this case lie directly against the fuel injector or directly to the bracket portion of the retaining clip. An embodiment of the damping composite element with two outer damping layers which form the first outer side and the second outer side of the damping composite element is also possible.

Vorteilhaft ist es auch, dass zumindest eine weitere Metallschicht vorgesehen ist, und dass zumindest eine Dämpfungsschicht zwischen der Metallschicht und der weiteren Metallschicht angeordnet ist. Hierbei ist auch eine Ausgestaltung mit mehreren Dämpfungsschichten möglich. Durch die Anordnung einer Dämpfungsschicht zwischen zwei Metallschichten ist ein vorteilhafter Schutz dieser Dämpfungsschicht gegenüber der Umgebung und gegenüber mechanischem Abrieb möglich.It is also advantageous that at least one further metal layer is provided, and that at least one damping layer is arranged between the metal layer and the further metal layer. In this case, an embodiment with several damping layers is possible. By arranging a damping layer between two metal layers, an advantageous protection of this damping layer from the environment and against mechanical abrasion is possible.

Ferner ist es vorteilhaft, dass das Dämpfungsverbundelement als teilringförmiges Dämpfungsverbundelement ausgestaltet ist, dass das Dämpfungsverbundelement Endabschnitte und einen die Endabschnitte verbindenden Bogenabschnitt aufweist und dass das Dämpfungsverbundelement an seinen Endabschnitten mit einer größeren Breite ausgestaltet ist als an seinem Bogenabschnitt. Durch die Endabschnitte können somit breite Auflagebereiche gewährleistet werden, an denen eine wirksame Dämpfung erzielt ist. Der Bogenabschnitt ermöglicht demgegenüber eine hohe Flexibilität des Dämpfungsverbundelements, da dieser vergleichsweise schmal ausgeführt ist. Speziell in Kombination mit einem U-förmigen Haltebügel kann somit an den beiden Bügelabschnitten des Haltebügels eine Dämpfung über die breiten Endabschnitte erzielt werden, während der schmale Bogenabschnitt des Dämpfungsverbundelements einen Toleranzausgleich ermöglicht.Furthermore, it is advantageous that the damping composite element is designed as a partial annular damping composite element, that the damping composite element has end sections and an arc section connecting the end sections, and that the damping composite element is configured with a greater width at its end sections than at its arc section. By the end portions thus broad contact areas can be guaranteed, where an effective damping is achieved. In contrast, the arc section allows a high degree of flexibility of the damping composite element, since this is made comparatively narrow. Especially in combination with a U-shaped headband can thus be achieved on the two strap portions of the retaining clip damping over the wide end portions, while the narrow arc portion of the damping composite element allows tolerance compensation.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Bevorzugte Ausführungsbeispiele der Erfindung sind in der nachfolgenden Beschreibung unter Bezugnahme auf die beigefügten Zeichnungen, in denen sich entsprechende Elemente mit übereinstimmenden Bezugszeichen versehen sind, näher erläutert. Es zeigt:

  • Fig. 1 eine Anordnung mit einem Brennstoffverteiler und mehreren Brennstoffeinspritzventilen in einer schematischen Schnittdarstellung entsprechend einem ersten Ausführungsbeispiel der Erfindung;
  • Fig. 2 eine auszugsweise, schematische Schnittdarstellung der in Fig. 1 dargestellten Anordnung entsprechend dem ersten Ausführungsbeispiel der Erfindung;
  • Fig. 3 den in Fig. 2 dargestellten Ausschnitt entsprechend einem zweiten Ausführungsbeispiel der Erfindung;
  • Fig. 4 ein in Fig. 2 dargestelltes Dämpfungsverbundelement in einer schematischen Schnittdarstellung entsprechend einem dritten Ausführungsbeispiel der Erfindung;
  • Fig. 5 das in Fig. 4 dargestellte Dämpfungsverbundelement in einer schematischen Schnittdarstellung entsprechend einem vierten Ausführungsbeispiel der Erfindung;
  • Fig. 6 das in Fig. 4 dargestellte Dämpfungsverbundelement in einer schematischen Schnittdarstellung entsprechend einem fünften Ausführungsbeispiel der Erfindung und
  • Fig. 7 eine Tasse, einen Haltebügel und ein Dämpfungsverbundelement der in Fig. 1 dargestellten Anordnung in einer auszugsweisen, schematischen Schnittdarstellung entsprechend einem sechsten Ausführungsbeispiel der Erfindung.
Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with identical reference numerals. It shows:
  • Fig. 1 an arrangement with a fuel distributor and a plurality of fuel injection valves in a schematic sectional view according to a first embodiment of the invention;
  • Fig. 2 an excerpts, schematic sectional view of in Fig. 1 illustrated arrangement according to the first embodiment of the invention;
  • Fig. 3 the in Fig. 2 illustrated section according to a second embodiment of the invention;
  • Fig. 4 a in Fig. 2 illustrated damping composite element in a schematic sectional view according to a third embodiment of the invention;
  • Fig. 5 this in Fig. 4 illustrated damping composite element in a schematic sectional view according to a fourth embodiment of the invention;
  • Fig. 6 this in Fig. 4 illustrated damping composite element in a schematic sectional view according to a fifth embodiment of the invention and
  • Fig. 7 a cup, a headband and a damping composite element of Fig. 1 illustrated arrangement in a partial, schematic sectional view according to a sixth embodiment of the invention.

Ausführungsformen der ErfindungEmbodiments of the invention

Fig. 1 zeigt eine Anordnung 1 mit einem Brennstoffverteiler 2 und mehreren Brennstoffeinspritzventilen 3, 4 in einer schematischen Schnittdarstellung. Die Anordnung 1 kann insbesondere als Brennstoffeinspritzanlage zur Hochdruckeinspritzung bei Brennkraftmaschinen dienen. Der Brennstoffverteiler 2 kann an vorgegebenen Anschraubpunkten über Halter 5, 6 oder dergleichen an einer Anbaustruktur 7, insbesondere einem Zylinderkopf 7, befestigt werden. In der Fig. 1 sind zur Vereinfachung der Darstellung nur zwei Brennstoffeinspritzventile 3, 4 dargestellt. Es kann jedoch auch eine größere Anzahl an Brennstoffeinspritzventilen vorgesehen sein. Der Brennstoffverteiler 2 ist in diesem Ausführungsbeispiel als Brennstoffverteilerleiste 2 mit einem länglichen, insbesondere rohrförmigen, Grundkörper ausgestaltet. An dem Brennstoffverteiler 2 ist eine Hochdruckleitung 8 angeschlossen, über die im Betrieb unter hohem Druck stehender Brennstoff in den Brennstoffverteiler 2 geführt wird. Fig. 1 shows an arrangement 1 with a fuel distributor 2 and a plurality of fuel injection valves 3, 4 in a schematic sectional view. The arrangement 1 can serve in particular as a fuel injection system for high-pressure injection in internal combustion engines. The fuel distributor 2 can be attached to a mounting structure 7, in particular a cylinder head 7, at predetermined attachment points via holders 5, 6 or the like. In the Fig. 1 For simplicity of illustration only two fuel injectors 3, 4 are shown. However, it may also be provided a larger number of fuel injection valves. The fuel distributor 2 is designed in this embodiment as a fuel distributor strip 2 with an elongated, in particular tubular, base body. At the fuel distributor 2, a high-pressure line 8 is connected, is guided through the fuel in the high pressure fuel in the fuel distributor 2 during operation.

Der Brennstoffverteiler 2 weist mehrere Tassen 9, 10 auf. An der Tasse 9 ist das Brennstoffeinspritzventil 3 angeordnet. An der Tasse 10 ist das Brennstoffeinspritzventil 4 angeordnet. Die Brennstoffeinspritzventile 3, 4 sind nicht direkt, sondern nur mittelbar mit den Tassen 9, 10 des Brennstoffverteilers 2 verbunden. Die mechanische Kraftübertragung erfolgt hierbei jeweils mittels eines Dämpfungsverbundelements 11, 12. In der Fig. 1 ist schematisch der Kraftübertragungspfad veranschaulicht. Die konstruktive Ausgestaltung der Verbindung zwischen dem Brennstoffverteiler 2 und den Brennstoffeinspritzventilen 3, 4 entsprechend dem ersten Ausführungsbeispiel ist nachfolgend anhand der Fig. 2 näher beschrieben.The fuel distributor 2 has a plurality of cups 9, 10. On the cup 9, the fuel injection valve 3 is arranged. On the cup 10, the fuel injection valve 4 is arranged. The fuel injection valves 3, 4 are not directly, but only indirectly connected to the cups 9, 10 of the fuel distributor 2. The mechanical power transmission takes place in each case by means of a damping composite element 11, 12. In the Fig. 1 is schematically illustrated the power transmission path. The structural design of the connection between the fuel distributor 2 and the fuel injection valves 3, 4th according to the first embodiment is described below with reference to the Fig. 2 described in more detail.

Fig. 2 zeigt einen auszugsweisen, schematischen Schnitt der in Fig. 1 dargestellten Anordnung 1 entsprechend dem ersten Ausführungsbeispiel. Hierbei ist das Brennstoffeinspritzventil 3 teilweise in die Tasse 9 eingefügt. Eine Längsachse 15 des Brennstoffeinspritzventils 3 erstreckt sich hierbei vorzugsweise mittig durch die Tasse 9. Zur Befestigung des Brennstoffeinspritzventils 3 an der Tasse 9 wird im eingefügten Zustand ein Haltebügel 16 an der Tasse 9 montiert. Im montierten Zustand befindet sich ein Bügelabschnitt 17 des Haltebügels 16 dann zwischen einer Innenseite 18 der Tasse 9 und ohne direkte Anlage an einer Außenseite 19 des Brennstoffeinspritzventils 3. Ferner ist das Dämpfungsverbundelement 11 zwischen dem Bügelabschnitt 17 des Haltebügels 16 und der Außenseite 19 des Brennstoffeinspritzventils 3 angeordnet. Fig. 2 shows an excerpt, schematic section of the in Fig. 1 illustrated arrangement 1 according to the first embodiment. Here, the fuel injection valve 3 is partially inserted into the cup 9. A longitudinal axis 15 of the fuel injection valve 3 in this case preferably extends centrally through the cup 9. For fastening the fuel injection valve 3 to the cup 9, a retaining clip 16 is mounted on the cup 9 in the inserted state. In the assembled state, a bracket portion 17 of the retaining clip 16 is then between an inner side 18 of the cup 9 and without direct contact with an outer side 19 of the fuel injection valve 3. Further, the damping composite element 11 between the bracket portion 17 of the retaining clip 16 and the outer side 19 of the fuel injection valve third arranged.

In diesem Ausführungsbeispiel weist das Dämpfungsverbundelement 11 Metallschichten 20, 21 und eine Dämpfungsschicht 22 auf. Die Dämpfungsschicht 22 ist hierbei zwischen den Metallschichten 20, 21 angeordnet. Die Dämpfungsschicht 22 kann hierbei mit den Metallschichten 20, 21 verbunden sein. Bei dieser Ausgestaltung ist die Dämpfungsschicht 22 vorteilhaft gegenüber der Umgebung und gegen Abrieb geschützt. Außerdem ergibt sich eine vorteilhafte Kraftübertragung. Speziell können die übertragenen Kräfte homogenisiert werden und punkt- beziehungsweise linienförmige Spitzenbelastungen werden vermieden. Hierdurch ist ein vorteilhaftes Dämpfungsverhalten über die Lebensdauer gewährleistet.In this exemplary embodiment, the damping composite element 11 has metal layers 20, 21 and a damping layer 22. The damping layer 22 is in this case arranged between the metal layers 20, 21. The damping layer 22 may in this case be connected to the metal layers 20, 21. In this embodiment, the damping layer 22 is advantageously protected from the environment and against abrasion. In addition, there is an advantageous power transmission. Specifically, the transmitted forces can be homogenized and punctiform or linear peak loads are avoided. As a result, an advantageous damping behavior over the life is guaranteed.

An der Außenseite 19 des Brennstoffeinspritzventils 3 ist eine Stützfläche 25 ausgestaltet. Die Stützfläche 25 ist in einem axialen Querschnitt bezüglich der Längsachse 15 des Brennstoffeinspritzventils 3 geneigt. Insbesondere kann die Stützfläche 25 als konische Stützfläche 25 ausgestaltet sein. Das Dämpfungsverbundelement 11 weist eine erste Außenseite 26 und eine zweite Außenseite 27 auf, die voneinander abgewandt sind. Die erste Außenseite 26 des Dämpfungsverbundelements 11 wirkt mit der Stützfläche 25 der Außenseite 19 des Brennstoffeinspritzventils 3 zusammen. Hierbei liegt das Dämpfungsverbundelement 11 mit seiner ersten Außenseite 26 flächig an der Stützfläche 25 des Brennstoffeinspritzventils 3 an. Hierdurch ist eine vorteilhafte Kraftübertragung gewährleistet. Außerdem ist eine örtliche Positionierung des Dämpfungsverbundelements 11 relativ zu dem Brennstoffeinspritzventil 3 gewährleistet. Die zweite Außenseite 27 des Dämpfungsverbundelements 11 wirkt mit dem Bügelabschnitt 17 des Haltebügels 16 zusammen. Der Bügelabschnitt 17 des Haltebügels 16 weist einen zumindest näherungsweise kreisförmigen Querschnitt auf. Der Querschnitt des Bügelabschnitts 17 kann auch zumindest näherungsweise elliptisch ausgestaltet sein. An der Innenseite 18 der Tasse 9 ist eine Ausnehmung 28 ausgestaltet, in die der Bügelabschnitt 17 des Haltebügels 16 eingefügt ist. Hierdurch ist der Haltebügel 16 relativ zu der Tasse 9 fixiert. Mittels des Dämpfungsverbundelements 11 ist somit auch das Brennstoffeinspritzventil 3 bezüglich der Tasse 9 fixiert.On the outer side 19 of the fuel injection valve 3, a support surface 25 is configured. The support surface 25 is inclined in an axial cross section with respect to the longitudinal axis 15 of the fuel injection valve 3. In particular, the support surface 25 may be configured as a conical support surface 25. The damping composite element 11 has a first outer side 26 and a second outer side 27, which are remote from each other. The first outer side 26 of the damping composite element 11 cooperates with the support surface 25 of the outer side 19 of the fuel injection valve 3. In this case, the damping composite element 11 lies with its first outer side 26 flat against the support surface 25 of the fuel injection valve 3. As a result, an advantageous power transmission is ensured. In addition, a local positioning of the damping composite element 11 is ensured relative to the fuel injection valve 3. The second outer side 27 of the damping composite element 11 cooperates with the bow section 17 of the retaining clip 16. The bracket portion 17 of the retaining clip 16 has an at least approximately circular cross-section. The cross section of the bracket portion 17 may also be configured at least approximately elliptical. On the inside 18 of the Cup 9 is a recess 28 configured, in which the bracket portion 17 of the retaining clip 16 is inserted. As a result, the headband 16 is fixed relative to the cup 9. By means of the damping composite element 11 is thus also the fuel injection valve 3 with respect to the cup 9 fixed.

Somit ist eine Befestigung des Brennstoffeinspritzventils 3 an dem Brennstoffverteiler 2 gewährleistet. Insbesondere durch die Betätigung des Brennstoffeinspritzventils 3 erzeugte Schwingungen werden hierbei auf dem Übertragungspfad zur Tasse 9 von dem Dämpfungsverbundelement 11 gedämpft. Somit ist eine wirksame Geräuschverminderung möglich.Thus, an attachment of the fuel injection valve 3 is ensured at the fuel distributor 2. In particular, vibrations generated by the operation of the fuel injection valve 3 are attenuated here on the transmission path to the cup 9 of the damping composite element 11. Thus, an effective noise reduction is possible.

Fig. 3 zeigt den in Fig. 2 dargestellten Ausschnitt der Anordnung 1 mit dem Brennstoffeinspritzventil 3, der Tasse 9 des Brennstoffverteilers 2, dem Haltebügel 16 und dem Dämpfungsverbundelement 11 entsprechend einem zweiten Ausführungsbeispiel. In diesem Ausführungsbeispiel ist das Dämpfungsverbundelement 11 so zwischen dem Bügelabschnitt 17 des Haltebügels 16 und der Außenseite 19 des Brennstoffeinspritzventils 3 angeordnet, dass das Dämpfungsverbundelement 11 sich teilweise an der Stützfläche 25 und teilweise an einem zylindermantelförmigen Teil 29 der Außenseite 19 abstützt. Hierbei ist das Dämpfungsverbundelement 11 im Profil gesehen gebogen ausgestaltet. Die zweite Außenseite 27 des Dämpfungsverbundelements 11 liegt nämlich zumindest teilweise an dem Bügelabschnitt 17 des Haltebügels 16 an. Fig. 3 shows the in Fig. 2 illustrated section of the arrangement 1 with the fuel injection valve 3, the cup 9 of the fuel distributor 2, the headband 16 and the damping composite element 11 according to a second embodiment. In this exemplary embodiment, the damping composite element 11 is arranged between the bow section 17 of the retaining clip 16 and the outer side 19 of the fuel injection valve 3 such that the damping composite element 11 is supported in part on the support surface 25 and partly on a cylinder jacket-shaped part 29 of the outer side 19. Here, the damping composite element 11 is designed bent in profile seen. The second outer side 27 of the damping composite element 11 is namely at least partially against the strap portion 17 of the retaining clip 16.

Durch die Anordnung des Dämpfungsverbundelements 11, wie sie beispielsweise anhand der Fig. 2 und 3 beschrieben ist, ist gewährleistet, dass eine mechanische Kraftübertragung über die mechanische Befestigung zwischen dem Brennstoffeinspritzventil 3 und der zugeordneten Tasse 9 des Brennstoffverteilers 2 stets über die Dämpfungsschicht 22 des Dämpfungsverbundelements 11 erfolgt. Schwingungen werden dadurch zuverlässig durch die Dämpfungsschicht 22 gedämpft. Eine entsprechende Ausgestaltung ist für das Brennstoffeinspritzventil 4 und die zugeordnete Tasse 10 vorgesehen. Vorzugsweise ist somit für jedes der Brennstoffeinspritzventile 3, 4 der Anordnung 1 solch eine Befestigung mit einem zugeordneten Dämpfungsverbundelement 11, 12 vorgesehen.Due to the arrangement of the damping composite element 11, as for example based on the Fig. 2 and 3 is described, it is ensured that a mechanical power transmission via the mechanical attachment between the fuel injection valve 3 and the associated cup 9 of the fuel distributor 2 always via the damping layer 22 of the damping composite element 11 takes place. Vibrations are thereby reliably damped by the damping layer 22. A corresponding embodiment is provided for the fuel injection valve 4 and the associated cup 10. Preferably, therefore, for each of the fuel injection valves 3, 4 of the arrangement 1, such an attachment with an associated damping composite element 11, 12 is provided.

Fig. 4 zeigt das in Fig. 2 dargestellte Dämpfungsverbundelement 11 in einer schematischen Schnittdarstellung entsprechend einem dritten Ausführungsbeispiel. In diesem Ausführungsbeispiel besteht das Dämpfungsverbundelement 11 aus einer Metallschicht 20 und einer Dämpfungsschicht 22. Die Dämpfungsschicht 22 ist hierbei mit der Metallschicht 20 verbunden. Beispielsweise kann die erste Außenseite 26 des Dämpfungsverbundelements 11 an der Dämpfungsschicht 22 vorgesehen sein, während die zweite Außenseite 27 an der Metallschicht 20 vorgesehen ist. Dann liegt die Dämpfungsschicht 22 an der Stützfläche 25 der Außenseite 19 des Brennstoffeinspritzventils 3 an. Allerdings ist auch eine umgekehrte Ausgestaltung beziehungsweise Anordnung möglich. Ferner kann das Dämpfungsverbundelement 11 auch gebogen ausgestaltet sein, wie es anhand der Fig. 3 veranschaulicht ist. Fig. 4 shows that in Fig. 2 illustrated damping composite element 11 in a schematic sectional view according to a third embodiment. In this exemplary embodiment, the damping composite element 11 consists of a metal layer 20 and a damping layer 22. In this case, the damping layer 22 is connected to the metal layer 20. For example, the first outer side 26 of the damping composite element 11 may be provided on the cushioning layer 22 while the second outer side 27 is provided on the metal layer 20. Then, the damping layer 22 abuts against the support surface 25 of the outer side 19 of the fuel injection valve 3. However, a reverse configuration or arrangement is possible. Furthermore, the damping composite element 11 can also be designed bent, as it is based on the Fig. 3 is illustrated.

Fig. 5 zeigt das in Fig. 4 dargestellte Dämpfungsverbundelement 11 in einer schematischen Schnittdarstellung entsprechend einem vierten Ausführungsbeispiel. In diesem Ausführungsbeispiel weist das Dämpfungsverbundelement 11 eine Metallschicht 20 und Dämpfungsschichten 22, 23 auf. Die erste Außenseite 26 des Dämpfungsverbundelements 11 ist an der Dämpfungsschicht 22 ausgebildet. Die zweite Außenseite 27 ist an der Dämpfungsschicht 23 ausgebildet. Bei dieser Ausgestaltung liegen somit die Dämpfungsschichten 22, 23 außen, während die Metallschicht 20 innen liegt. Somit ist innerhalb gewisser Grenzen eine Anpassung an die Kontaktpartner, nämlich einerseits das Brennstoffeinspritzventil 3 und andererseits den Haltebügel 16, möglich. Fig. 5 shows that in Fig. 4 illustrated damping composite element 11 in a schematic sectional view according to a fourth embodiment. In this exemplary embodiment, the damping composite element 11 has a metal layer 20 and damping layers 22, 23. The first outer side 26 of the damping composite element 11 is formed on the damping layer 22. The second outer side 27 is formed on the damping layer 23. In this embodiment, therefore, the damping layers 22, 23 are outside, while the metal layer 20 is located inside. Thus, within certain limits, an adaptation to the contact partners, namely on the one hand the fuel injection valve 3 and on the other hand, the headband 16, possible.

Fig. 6 zeigt das in Fig. 4 dargestellte Dämpfungsverbundelement 11 in einer schematischen Schnittdarstellung entsprechend einem fünften Ausführungsbeispiel. In diesem Ausführungsbeispiel besteht das Dämpfungsverbundelement 11 aus zwei Metallschichten 20, 21 und zwei Dämpfungsschichten 22, 23. Die Dämpfungsschicht 23 befindet sich zwischen den Metallschichten 20, 21. Die Metallschicht 20 befindet sich zwischen den Dämpfungsschichten 22, 23. Die Dämpfungsschicht 22 dient als außenliegende Dämpfungsschicht 22, während die Dämpfungsschicht 23 als innenliegende Dämpfungsschicht 23 dient. Die Metallschicht 21 dient als außenliegende Metallschicht 21, während die Metallschicht 20 als innenliegende Metallschicht 20 dient. Beispielsweise kann die erste Außenseite 26 an der Dämpfungsschicht 22 ausgebildet sein. Die zweite Außenseite 27 ist in diesem Fall an der Metallschicht 21 ausgebildet. Allerdings ist auch eine umgekehrte Ausgestaltung denkbar. Fig. 6 shows that in Fig. 4 illustrated damping composite element 11 in a schematic sectional view according to a fifth embodiment. In this embodiment, the damping composite element 11 consists of two metal layers 20, 21 and two damping layers 22, 23. The damping layer 23 is located between the metal layers 20, 21. The metal layer 20 is located between the damping layers 22, 23. The damping layer 22 serves as an external Damping layer 22, while the damping layer 23 serves as an internal damping layer 23. The metal layer 21 serves as the outer metal layer 21, while the metal layer 20 serves as the inner metal layer 20. For example, the first outer side 26 may be formed on the damping layer 22. The second outer side 27 is formed on the metal layer 21 in this case. However, a reverse embodiment is also conceivable.

Es ist anzumerken, dass die Dämpfungsverbundelemente 11, die in den Fig. 4 bis 6 dargestellt sind, im Profil gezeigt sind, wie es auch anhand der Fig. 2 und 3 der Fall ist. Ausgehend von diesem Profil sind zahlreiche Abwandlungen denkbar. Insbesondere sind Verbiegungen oder die Ausgestaltung von Biegekante an ein oder mehreren Stellen und/oder um ein oder mehrere Achsen möglich. Eine weitere Anpassung der Geometrie des Dämpfungsverbundelements 11 ist anhand der Fig. 7 näher beschrieben.It should be noted that the damping composite elements 11, which in the 4 to 6 are shown in profile, as it is also based on the Fig. 2 and 3 the case is. Starting from this profile, numerous modifications are conceivable. In particular, bending or the configuration of bending edge at one or more locations and / or about one or more axes are possible. A further adaptation of the geometry of the damping composite element 11 is based on Fig. 7 described in more detail.

Fig. 7 zeigt die Tasse 9, den Haltebügel 16 und das Dämpfungsverbundelement 11 einer Anordnung 1 in einer auszugsweisen, schematischen Schnittdarstellung entsprechend einem sechsten Ausführungsbeispiel. Zur Vereinfachung der Darstellung ist hierbei das zugeordnete Brennstoffeinspritzventil 3 nicht dargestellt. Der Haltebügel 16 ist als U-förmiger Haltebügel 16 ausgestaltet. Der Haltebügel 16 weist Bügelabschnitte 17, 17A auf. Die Tasse 9 weist geeignete Ausnehmungen 30, 31, 32, 33 auf, durch die der Haltebügel 16 gewissermaßen in die Tasse 9 einschiebbar ist. Die Ausnehmungen 30 bis 33 können beispielsweise durch Bohrungen realisiert sein. Die beiden Bügelabschnitte 17, 17A sind vorzugsweise parallel zueinander orientiert. Fig. 7 shows the cup 9, the headband 16 and the damping composite element 11 of an arrangement 1 in a partial, schematic sectional view accordingly a sixth embodiment. To simplify the illustration, in this case the associated fuel injection valve 3 is not shown. The headband 16 is designed as a U-shaped headband 16. The headband 16 has bow sections 17, 17A. The cup 9 has suitable recesses 30, 31, 32, 33, through which the headband 16 can be pushed into the cup 9 to a certain extent. The recesses 30 to 33 may be realized for example by drilling. The two strap sections 17, 17A are preferably oriented parallel to one another.

Das Dämpfungsverbundelement 11 ist in diesem Ausführungsbeispiel als teilringförmiges Dämpfungsverbundelement 11 ausgestaltet. Hierbei weist das Dämpfungsverbundelement 11 Endabschnitte 34, 35 auf. Außerdem weist das Dämpfungsverbundelement 11 einen Bogenabschnitt 36 auf, der die Endabschnitte 34, 35 miteinander verbindet. Das Dämpfungsverbundelement 11 ist an seinen Endabschnitten 34, 35 mit einer größeren Breite ausgestaltet als an seinem Bogenabschnitt 36. Die Endabschnitte 34, 35 sind somit als verbreiterte Endabschnitte 34, 35 ausgestaltet, die breite Auflagebereiche 34, 35 für einerseits das Brennstoffeinspritzventil 3 und andererseits die Bügelabschnitte 17, 17A bilden. Der Bogenabschnitt 36 bildet im Vergleich dazu einen schmalen Bogenabschnitt 36 als Verbindungsteil (Rückgrat).The damping composite element 11 is configured in this embodiment as a partial annular damping composite element 11. In this case, the damping composite element 11 has end sections 34, 35. In addition, the damping composite element 11 has an arc portion 36 which connects the end portions 34, 35 with each other. The damping composite element 11 is configured at its end portions 34, 35 with a greater width than at its arc portion 36. The end portions 34, 35 are thus configured as widened end portions 34, 35, the wide bearing areas 34, 35 for one hand, the fuel injection valve 3 and the other Ironing sections 17, 17A form. The arc portion 36 forms in comparison to a narrow arc portion 36 as a connecting part (spine).

Somit kann ein Dämpfungsverbundelement 11 in einer an den jeweiligen Anwendungsfall angepassten Ausgestaltung gewählt werden. Hierbei sind ein oder mehrere Metallschichten 20, 21 sowie ein oder mehrere Dämpfungsschichten 22, 23 vorgesehen. Außerdem ist eine ringförmige oder teilringförmige Ausgestaltung möglich. Die Dämpfungsschichten 22, 23 können als viskoelastische Dämpfungsschichten 22, 23 ausgestaltet sein. Die Dämpfungsschichten 22, 23 sind vorzugsweise als dünne viskoelastische Dämpfungsschichten 22, 23 ausgestaltet. Bei einer Relativverschiebung der Metallschichten 20, 21 und/oder der benachbarten Bauteile, nämlich des Haltebügels 16 beziehungsweise des Brennstoffeinspritzventils 3, gegeneinander wird die jeweils dazwischen liegende Dämpfungsschicht 22, 23 dynamisch stark beansprucht, so dass ein hoher Anteil an Vibrationsenergie durch die Materialdämpfung dissipiert wird. Speziell kann die Dämpfungsschicht 22, 23 hierbei aus einem Elastomer gebildet sein.Thus, a damping composite element 11 can be selected in a adapted to the particular application embodiment. Here, one or more metal layers 20, 21 and one or more damping layers 22, 23 are provided. In addition, an annular or semi-annular configuration is possible. The damping layers 22, 23 may be configured as viscoelastic damping layers 22, 23. The damping layers 22, 23 are preferably designed as thin viscoelastic damping layers 22, 23. In a relative displacement of the metal layers 20, 21 and / or the adjacent components, namely the holding bracket 16 and the fuel injection valve 3, against each other, the respective intermediate damping layer 22, 23 is dynamically stressed, so that a high proportion of vibration energy is dissipated by the material damping , Specifically, the damping layer 22, 23 may be formed of an elastomer here.

Die Dissipation von Körperschallenergie führt somit zu einer Bedämpfung von Schwingformen der Brennstoffeinspritzventile 3, 4 und des Brennstoffverteilers 2 und damit zu einer Reduzierung aller Körperschallanteile, die durch diese Schicht übertragen werden. Diese Eigenschaft ermöglicht eine Entkopplung beziehungsweise Isolation zwischen den Brennstoffeinspritzventilen 3, 4 und dem Brennstoffverteiler 2. Reine Metallkontakte, über die eine Körperschallübertragung möglich wäre, können somit von vornherein verhindert werden. Denn die mechanischen Kräfte werden stets über eine Dämpfungsschicht 22, 23 übertragen.The dissipation of body sound energy thus leads to a damping of vibration modes of the fuel injection valves 3, 4 and the fuel distributor 2 and thus to a reduction of all body sound components that are transmitted through this layer. This property enables a decoupling or isolation between the fuel injection valves 3, 4 and the fuel distributor 2. Pure metal contacts, via a structure-borne sound transmission would be possible, thus prevented from the outset become. Because the mechanical forces are always transmitted through a damping layer 22, 23.

Die Eigenschaften der Dämpfungsschicht 22, 23, wie beispielsweise eine Dicke oder materialspezifische Eigenschaften, können hinsichtlich einiger Optimierungsparameter angepasst werden. Optimierungsparameter sind hierbei vor allem die zu bedämpfenden Frequenzinhalte und die Temperatur, insbesondere die Betriebstemperatur.The properties of the damping layer 22, 23, such as a thickness or material-specific properties, may be adjusted with respect to some optimization parameters. Optimization parameters here are above all the frequency contents to be damped and the temperature, in particular the operating temperature.

Somit lassen sich wesentliche Vorteile erzielen. Geräusche des Brennstoffverteilers 2 werden reduziert. Eine relativ steife Anbindung der Brennstoffeinspritzventile 3, 4 kann trotz der Entkopplung beibehalten werden. Die Nachgiebigkeit für die Brennstoffeinspritzventile 3, 4 erhöht sich nämlich nur leicht, wobei alle Funktionsanforderungen, insbesondere eine geringe Relativbewegung, und Festigkeitsanforderungen, insbesondere der Verschleiß eines O-Dichtrings, erfüllt sind. Somit können gleichzeitig Akustik-, Funktions- und Festigkeitsanforderungen, die sich aus dem Design der Brennstoffeinspritzventile 3, 4 und des Brennstoffverteilers 2 ergeben, erfüllt werden.Thus, significant benefits can be achieved. Noises of the fuel distributor 2 are reduced. A relatively rigid connection of the fuel injection valves 3, 4 can be maintained despite the decoupling. The compliance for the fuel injection valves 3, 4 increases only slightly, all functional requirements, in particular a small relative movement, and strength requirements, in particular the wear of an O-ring, are met. Thus, acoustic, functional and strength requirements resulting from the design of the fuel injection valves 3, 4 and the fuel distributor 2 can be simultaneously satisfied.

Die Geräuschdämpfung kann in vorteilhafter Weise bei einer Fixierung mittels Haltebügel 16 realisiert werden.The noise damping can be realized in an advantageous manner with a fixation by means of retaining bracket 16.

Durch eine vorteilhafte Blechausführung können Radien- und/oder Konturanpassungen zu den Tassen 9, 10 und zu den Brennstoffeinspritzventilen 3, 4 vorgenommen werden, um Linienberührungen zu verhindern. Die Dämpfungsschichten 22, 23 können als Elastomerschichten 22, 23 zwischen den Metallschichten 20, 21 fest einvulkanisiert werden und somit vor Abrasion geschützt werden.By an advantageous sheet metal design radii and / or contour adjustments can be made to the cups 9, 10 and the fuel injection valves 3, 4, to prevent line contact. The damping layers 22, 23 can be firmly vulcanized as elastomer layers 22, 23 between the metal layers 20, 21 and thus protected from abrasion.

Der Montageaufwand ist gering, da die Dämpfungsverbundelemente 11, 12 lediglich vor der Montage der Brennstoffeinspritzventile 3, 4 eingelegt werden müssen.The assembly effort is low, since the damping composite elements 11, 12 only have to be inserted before the assembly of the fuel injection valves 3, 4.

Die Entkopplung kann an einem leitungsangebundenen Design des Brennstoffverteilers 2 realisiert werden, indem die Dämpfungsverbundelemente 11, 12 an der Fügestelle zwischen den aufgehängten Brennstoffeinspritzventilen 3, 4 und einem Funktionsblock für den Brennstoffverteiler 2 eingesetzt werden.The decoupling can be realized on a line-connected design of the fuel distributor 2 by the damping composite elements 11, 12 are used at the joint between the suspended fuel injection valves 3, 4 and a functional block for the fuel distributor 2.

Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt.The invention is not limited to the described embodiments.

Claims (11)

  1. Arrangement (1), in particular fuel injection system for high-pressure injection in internal combustion engines, having a fuel distributor (2) and multiple fuel injection valves (3, 4), wherein each of the fuel injection valves (3, 4) is arranged on a cup (9, 10) of the fuel distributor (2), and wherein at least one of the fuel injection valves (3, 4) is fastened to the associated cup (9) by means of a retaining clip (16), wherein at least one damping composite element (11) is provided which has at least one elastically deformable damping layer (22),
    characterized
    in that the retaining clip (16) has at least one clip portion (17) which is arranged between an inner side (18) of the cup (9) and an outer side (19) of the fuel injection valve (3), wherein the retaining clip (16) is of U-like design, and at least the clip portion (17) of the retaining clip (16) has at least approximately elliptical or at least approximately circular cross section, and the at least one damping composite element (11) is arranged between the clip portion (17) of the retaining clip (16) and the outer side (19) of the fuel injection valve (3).
  2. Arrangement according to Claim 1,
    characterized
    in that, on the inner side of the cup (18), there is formed a recess (28) into which the clip portion (17) of the retaining clip (16) is inserted.
  3. Arrangement according to Claim 1 or 2,
    characterized
    in that, on the outer side (19) of the fuel injection valve (3), there is formed a support surface (25) which, in an axial cross section, is inclined relative to a longitudinal axis (15) of the fuel injection valve (3), in that a first outer side (26) of the damping composite element (11) interacts with the support surface (25) on the outer side (19) of the fuel injection valve (3), and in that a second outer side (27), averted from the first outer side (26), of the damping composite element (11) interacts with the clip portion (17) of the retaining clip (16).
  4. Arrangement according to Claim 3,
    characterized
    in that the support surface (25) of the fuel injection valve (3) is of conical design, and in that the first outer side (26) of the damping composite element (11) bears at least substantially against the conical support surface (25) of the fuel injection valve (3).
  5. Arrangement according to Claim 3,
    characterized
    in that the second outer side (27) of the damping composite element (11) bears at least partially against the clip portion (17).
  6. Arrangement according to any of Claims 1 to 5,
    characterized
    in that a mechanical transmission of force via the mechanical fastening between the fuel injection valve (3) and the associated cup (9) always takes place via the damping layer (22) of the damping composite element (11).
  7. Arrangement according to any of Claims 1 to 6,
    characterized
    in that the damping composite element (11) has at least one metal layer (20) which is connected to the damping layer (22).
  8. Arrangement according to Claim 7,
    characterized
    in that at least one damping layer (22, 23) is configured as an outer damping layer (22, 23).
  9. Arrangement according to Claim 7 or 8,
    characterized
    in that at least one further metal layer (21) is provided, and in that at least one damping layer (22, 23) is arranged between the metal layer (20) and the further metal layer (21).
  10. Arrangement according to any of Claims 1 to 9,
    characterized
    in that the damping composite element (11) is configured as a ring-segment-shaped damping composite element (11), and in that the damping composite element (11) has end portions (34, 35) and an arcuate portion (36) which connects the end portions (34, 35).
  11. Arrangement according to Claim 10,
    characterized
    in that the damping composite element (11) is formed with a greater width at its end portions (34, 35) than at its arcuate portion (36).
EP13714602.3A 2012-04-26 2013-03-27 Arrangement with a fuel distributer and multiple fuel injection valves Active EP2841760B1 (en)

Priority Applications (1)

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Applications Claiming Priority (2)

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DE102012206896A DE102012206896A1 (en) 2012-04-26 2012-04-26 Arrangement with a fuel distributor and a plurality of fuel injection valves
PCT/EP2013/056582 WO2013160064A1 (en) 2012-04-26 2013-03-27 Arrangement with a fuel distributer and multiple fuel injection valves

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EP (1) EP2841760B1 (en)
KR (1) KR102109319B1 (en)
CN (1) CN104254684B (en)
DE (1) DE102012206896A1 (en)
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DE102013200728A1 (en) 2013-01-18 2014-07-24 Robert Bosch Gmbh Fuel injection system with a fuel-carrying component, a fuel injection valve and a connecting element
DE102013200982A1 (en) * 2013-01-22 2014-07-24 Robert Bosch Gmbh Fuel injection system with a fuel-carrying component, a fuel injection valve and a suspension
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CN104254684A (en) 2014-12-31
US20150068497A1 (en) 2015-03-12
KR102109319B1 (en) 2020-05-12
DE102012206896A1 (en) 2013-10-31
WO2013160064A1 (en) 2013-10-31
CN104254684B (en) 2017-12-15
KR20150003750A (en) 2015-01-09
US10041460B2 (en) 2018-08-07
EP2841760A1 (en) 2015-03-04
PL2841760T3 (en) 2019-08-30
ES2731098T3 (en) 2019-11-14

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