EP2657503B1 - Assembly with a fuel distributor and a holder - Google Patents
Assembly with a fuel distributor and a holder Download PDFInfo
- Publication number
- EP2657503B1 EP2657503B1 EP13161900.9A EP13161900A EP2657503B1 EP 2657503 B1 EP2657503 B1 EP 2657503B1 EP 13161900 A EP13161900 A EP 13161900A EP 2657503 B1 EP2657503 B1 EP 2657503B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- damping
- holder
- fuel distributor
- composite element
- layer
- 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.)
- Not-in-force
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Classifications
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- 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
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- 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
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- 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
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
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- 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
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- 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
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- 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
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- 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
- F02M2200/857—Mounting of fuel injection apparatus characterised by mounting fuel or common rail to engine
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 at least one holder, which serves for fastening the fuel distributor to a mounting structure, in particular of the internal combustion engine ( DE-A-10 2008 044 165 ).
- a fuel injector is known.
- the known fuel injection device is characterized by a sound-decoupling design.
- a fuel distributor line is fastened by means of connecting means to a cylinder head of an internal combustion engine.
- at least one damping disk is provided in each case.
- the damping disks are used for decoupling and can be arranged in the region below the screw head with a support directly to the fuel rail or with a support directly on the cylinder head, so that the high-pressure injection system, consisting of the fuel rail and several fuel injection valves, more effectively decoupled towards the cylinder head and soundproofed better is.
- A1 known fuel injection device has the disadvantage that on the tightening torque of the connecting means, a bias of the damping disk or the damping disks is generated, which leads to fatigue over the life of the material of the damping disk or the damping disks. In addition, there is a dependence on the torque or this must be precisely adhered to. If the tightening torque is too high, then premature fatigue of the damping disk occurs. On the other hand, if the tightening torque is too low, then, due to a backlash, premature wear of the components, especially in the fastening area due to shocks and vibrations, can occur.
- the arrangement according to the invention with the features of claim 1 has the advantage that an improved vibration damping over the life is guaranteed. Specifically, there is the advantage that a sufficient noise attenuation is ensured even after a long period of operation.
- 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 can serve for distributing the fuel to a plurality of fuel injection valves, in particular high-pressure injection valves.
- the fuel distributor can serve as a common fuel storage for the high-pressure injectors.
- the injection valves are suitably connected to the fuel distributor and then 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 holder can serve for fastening the fuel distributor to the internal combustion engine or other mounting structure.
- the mounting structure, in particular the internal combustion engine is not necessarily part of the arrangement.
- the arrangement, in particular the fuel injection system can also be manufactured and distributed independently of a mounting structure or an internal combustion engine.
- the fuel distributor can be excited during operation to oscillations in the audible frequency range. This can be done mainly by noise sources in the high pressure injectors, which may be part of the fuel injection system.
- the structure-borne sound propagates from the high-pressure injection valves, for example via rail cups, the fuel distributor and one or more holders, to the mounting structure, from where disturbing noises can be emitted, which may even penetrate into the interior of the vehicle.
- the damping composite element By means of the damping composite element, however, such disturbing noises can be damped. As a result, in particular a noise nuisance inside the vehicle can be prevented.
- the mounting structure can be advantageously formed by a cylinder head of the internal combustion engine. However, it can also be provided via a connection spacers or other connecting elements. In principle, directly disturbing airborne sound can also be radiated from an outside of the fuel distributor, in particular if the fuel distributor is exposed to a motor structure. By connecting the damping composite element with the fuel distributor, a noise damping can be ensured in this regard.
- the damping can be effected in the region of the holder, in the region of the fuel distributor or both in the region of the holder and in the region of the fuel distributor.
- the damping composite element is not necessarily biased by a bias.
- the damping composite element is also applied only locally in the region of an attachment point.
- the elastically deformable damping layer sees no bias. This has a favorable effect on the noise damping over the service life.
- the damping composite elements also allow a vibration damping, without the strength and function relevant rigid connection of the fuel distributor must be reduced via the holder to the mounting structure in comparison to a firmly screwed connection.
- a vibration damping without the strength and function relevant rigid connection of the fuel distributor must be reduced via the holder to the mounting structure in comparison to a firmly screwed connection.
- the damping composite elements can be adapted in size and number to the particular application. As a result, high noise emission requirements for acoustic improvement can be met. This can be a strong damping of vibration modes of the fuel distributor and the so accompanying amplitude reduction of these waveforms can be achieved.
- the damping composite elements can be applied superficially.
- the elastically deformable damping layer can be designed as an elastomer layer and a connection of the damping layer with at least one metal layer of the damping composite element or an adjacent outer side of the fuel distributor can be produced by vulcanization. Thereby, a high damping of the vibrations can be combined with a high reliability.
- the damping layer of the damping composite element can be connected by vulcanization with the holder and / or the fuel distributor.
- the damping layer is formed here in an advantageous manner from a rubber-based material.
- rubber is to be understood generally and includes synthetic rubber as well as natural rubber.
- the holder is integrally connected to the fuel distributor.
- the holder can be soldered to the fuel distributor in an advantageous manner.
- the design of the solder joint can be carried out in a continuous furnace. Downstream, the damping composite element can be connected to the holder and / or the fuel distributor. Thus, a deterioration of the material of the damping layer is prevented by the soldering process from the outset.
- the damping composite element can advantageously be designed in a sandwich construction.
- one or more damping layers can be combined with one or more metal layers to form a composite.
- the metal layers and the damping layers in this case preferably alternate and are connected to one another in a suitable manner.
- the damping composite element can be realized advantageously a mechanical action principle for vibration reduction.
- one or more preferably viscoelastic damping layers can be laminated or vulcanized between two or more metal layers.
- the metal layers can be produced here from metal sheets. Under relative displacements or oscillations of the metal layers, as they occur in particular during flexural vibrations, the elastically deformable damping layer lying between them is stressed dynamically. A high proportion of vibration energy is thereby dissipated via the material damping of the material of the damping layer. The dissipation of body sound energy thus leads to a damping of vibration modes of the fuel distributor and thus indirectly to a reduction of the associated airborne sound.
- the associated structure-borne sound components can be reduced, which are transmitted via the waveforms on the holders and thus from the fuel distributor in the mounting structure. This corresponds to a partial insulation of the fuel distributor with respect to the mounting structure.
- the properties of the elastically deformable damping layer can be adjusted with regard to some optimization parameters, in particular the frequency contents to be damped and the temperature.
- the damping layer may be made of a rubber, in particular a natural rubber or a synthetic rubber.
- the damping layer may also be made of a polymer, in particular a thermoplastic elastomer or a pure thermoplastic. If a plurality of damping layers are provided, then a further adaptation of the properties of the damping composite element to the respective application can be achieved by a combination of different materials.
- the damping composite elements can be adapted in terms of their geometric design to a variety of different fuel manifolds and holders. It is particularly advantageous that the holder is configured as a plate-shaped holder and / or as a bridge. The damping composite element can then be connected over its entire surface to an upper side of the holder. This results in a particularly high damping effect in combination with a planar, thin-walled basic structure of the holder and the damping composite element. In this case, a strong coupling between the damping composite element and the holder can be achieved.
- the damping composite element can be adapted in terms of the layer structure in an advantageous manner to the particular application.
- the damping composite element consists of exactly one metal layer and an elastically deformable damping layer, in particular elastomer layer, connected to the metal layer.
- An adhesive layer is applied to the cushioning layer.
- the application of the adhesive layer can also be done before a bending-punching step, whereby the production is simplified.
- the damping composite element on an inner damping layer, in particular viscoelastic damping layer, on.
- the damping composite element preferably consists of exactly two Metal layers and a holder or the fuel distributor oriented further damping layer.
- An adhesive layer is additionally applied to the damping layer oriented to the holder or fuel distributor. The application of the adhesive layer can in this case take place before the bending-punching step, whereby the production is simplified.
- the damping composite element is connected to the holder or the fuel distributor.
- the damping composite element is superficially joined after the soldering process in which the holder is connected to the fuel distributor.
- the connection between the damping composite element and the fuel distributor or the holder can be effected by an applied adhesive layer.
- an adhesive layer is applied to the damping composite element in advance. Then, the damping composite element can be formed with the applied adhesive layer and then applied to the outside of the fuel distributor or on an upper side of the holder and glued.
- the damping composite element is preferably deformed and then fixed in a device together with the fuel distributor and the holder, so that a gap between the two joining partners is formed.
- the raw material for the damping layer serving as the connecting layer is then passed into the gap and cured in a subsequent process step.
- an elastomeric raw material can be used.
- the damping layer formed thereby is then part of the damping composite element.
- the damping layer then allows an advantageous damping effect and at the same time forms the connection to the fuel distributor or the holder.
- modifications in the production are possible.
- one or more damping composite elements in a suitable geometric configuration and suitable positioning on the holder and / or the Fuel distributor are attached.
- a damping composite element can in principle be applied to all surfaces of the holder or of the fuel distributor.
- the damping composite element is configured adapted to the outer contour of the joining partner. This can be prepared by a suitable bending-punching process.
- the damping composite elements are applied to thin holders.
- the holders can in this case be designed in particular by thin metal sheets.
- the degree of coverage here is preferably as large as possible.
- a holder which consists of a large-area sheet metal blank in the form of a bridge with several attachment points. This allows the attachment of the fuel distributor with a single holder, on which a correspondingly shaped damping composite element is applied. As a result, continuous vibration modes, for example, bending vibrations of a tubular body of the fuel distributor, can be damped.
- the damping composite elements can also be applied to the outside of a tubular body of the fuel distributor, which then preferably extend along the longitudinal axis of the fuel distributor and are connected to the outside of the fuel distributor.
- the damping composite element can extend at least substantially over the entire length of a fuel distributor designed as a fuel distributor strip.
- the noise transmissions from the fuel distributor into the mounting structure can be reduced. As a result, a partial decoupling can be achieved.
- the vibration load of the fuel distributor and the high-pressure injectors due to the vibration load of the engine decreases, since the vibration transmission is attenuated in this direction. This results in advantages in terms of the design and reliability of these components.
- damping composite element can easily be used in existing systems, with no or only minor adjustments are required. This results in a broad scope.
- Fig. 1 shows an arrangement 1 with a fuel distributor 2 and a holder 3, which serves for fastening the fuel distributor 2 to a mounting structure 4, in an excerptive, schematic sectional view according to a first embodiment.
- the arrangement 1 can be configured in particular as a fuel injection system for high-pressure injection in internal combustion engines.
- the mounting structure 4 may in particular be an internal combustion engine.
- the mounting structure 4 may be the cylinder head of an internal combustion engine 4.
- the arrangement 1 is particularly suitable for mixture-compression, spark-ignited internal combustion engines.
- the fuel distributor 2 has a tubular main body 5 in this exemplary embodiment.
- the fuel distributor 2 is designed here as a fuel distributor strip 2, which stores a high-pressure fuel quantity and leads to a plurality of fuel injection valves, not shown.
- the holder 3 is suitably connected to the fuel distributor 2.
- the holder 3 is soldered to the fuel distributor 2, wherein soldering points 6, 7 are shown for illustration. The soldering can be done in a continuous furnace.
- the arrangement 1 also has a damping composite element 8.
- the damping composite element 8 is connected to the holder 3.
- the connection of the damping composite element 8 with the holder 3 is preferably carried out after establishing the connection between the holder 3 and the fuel distributor 2. As a result, a thermal impairment of the damping composite element 8 is prevented.
- the damping composite element 8 has in this embodiment, a metal layer 9, which is at least substantially formed of a metallic material, an elastically deformable damping layer 10 and a further metal layer 11, which is at least substantially formed of a metallic material.
- the damping layer 10 is arranged in this embodiment between the metal layers 9, 11.
- the damping layer 10 is connected on the one hand to the metal layer 9 and on the other hand to the metal layer 11.
- the compound of the damping layer 10 with the metal layers 9, 11 can be made by lamination or vulcanization.
- an adhesive layer 12 is provided between the damping composite element 8 and the holder 3.
- the adhesive layer 12 may in this case first be applied to the damping composite element 8. Then, the damping composite element 8 can be first cut to the adhesive layer 12, for example via a stamping process, and then connected to an upper side 13 of the holder 3.
- the holder 3 is preferably formed from a metal sheet.
- the damping composite element 8 is preferably connected over its entire area with the upper side 13 of the holder 3. Accordingly, in this exemplary embodiment, the adhesive layer 12 is configured as completely as possible between the damping composite element 8 and the holder 3.
- the fastening of the fuel distributor 2 to the mounting structure 4 can take place via one or more fastening means 14.
- the fastening means 14 may be configured in particular as a screw 14.
- the damping layer 10 and the metal layers 9, 11 may be integrally connected to each other.
- a connection of the damping composite element 8 with the top 13 of the holder 3 can be achieved.
- the metal layer 9 of the damping composite element 8 is connected via the adhesive layer 12 with the top 13 of the holder 3.
- a damping composite element 8 can also be connected to the fuel distributor 2.
- a damping composite element 8 can also be applied to an outer side 15 of the tubular base body 5.
- An application to both the holder 3 and the fuel distributor 2 is possible.
- the damping composite element 8 is then partially connected to the outside 15 of the fuel distributor 2 and partially to the top 13 of the holder 3.
- a damping composite element 8 can also be attached to an underside 16 of the holder 3.
- a plurality of damping composite elements 8 can also be connected to the fuel distributor 2 and / or the holder 3.
- Fig. 2 shows a damping composite element 8 and a holder of in Fig. 1 illustrated arrangement 1 according to a second embodiment in an excerpt, schematic representation.
- the elastically deformable damping layer 10 is connected via the adhesive layer 12 with the top 13 of the holder 3.
- an embodiment with exactly one metal layer 9 and exactly one damping layer 10 is possible.
- the elastically deformable damping layer 10 is in this case protected by the metal layer 9 from the environment.
- Fig. 3 shows that in Fig. 2 illustrated damping composite element 8 and the holder 3 according to a third embodiment.
- the damping composite element 8 has the metal layer 9, the further metal layer 11, the elastically deformable damping layer 10 and a further elastically deformable damping layer 17.
- the further elastically deformable damping layer 17 is arranged between the metal layers 9, 11.
- the elastically deformable damping layer 10 is on the one hand connected to the metal layer 9 and on the other hand facing the holder 3.
- the damping layer 10 is connected via the adhesive layer 12 to the top 13 of the holder 3.
- the damping composite element 8, which is formed from the metal layers 9, 11 and the damping layers 10, 17, is connected to the holder 3.
- a damping composite element 8 having a plurality of metal layers 9, 11 and a plurality of damping layers 10, 17 can be configured.
- the metal layers 9, 11 can also be formed from different metallic materials.
- the damping composite elements 8, 17 may in particular be formed from a material based on rubber or a polymer. In this case, the damping layers 10, 17 may also be formed of different materials.
- Fig. 4 shows the in Fig. 1 illustrated arrangement 1 in an excerpt, schematic sectional view according to a fourth embodiment.
- the damping composite element 8 has the metal layer 9 and the elastically deformable damping layer 10.
- the elastically deformable damping layer 10 is connected directly to the top 13 of the holder 3. This can be achieved by a subsequent vulcanization of the damping layer 10.
- the holder 3 connected to the fuel distributor 2 can be fixed together with the metal layer 9 via a suitable device.
- the damping composite element 8 is then formed from the metal layer 9 and the damping layer 10. Furthermore, the damping layer 10 is then connected on the one hand to the metal layer 9 and on the other hand to the holder 3.
- the cushion layer 10 of the cushion composite member 8 may be bonded to the holder 3 by vulcanization.
- Fig. 5 shows the in Fig. 1 illustrated arrangement 1 in a schematic representation of the designated V direction of view according to a fifth embodiment.
- the holder 3 is preferably formed from a strip-shaped metal sheet. In this case, a suitable through hole is formed in the holder 3, through which the fastening means 14 extends.
- the upper side 13 is connected in this embodiment approximately over the entire surface with the damping composite element 8.
- the holders 3, 3A, 3B are arranged distributed along a longitudinal axis 18 on the tubular base body 5 and soldered to the tubular base body 5.
- Fig. 6 shows the in Fig. 5 illustrated arrangement 1 in a schematic representation according to a sixth embodiment.
- the holder 3 is formed from a large-area sheet metal blank which extends at least substantially over the entire length of the tubular base body 5 of the fuel distributor 2.
- tabs 20, 21, 22 are configured.
- the damping composite element 8 is approximately the entire surface connected to the top 13 of the holder 3.
- the damping composite element 8 also extends along the axis 18 over almost the entire length of the tubular main body 5 of the fuel distributor 2 configured as a fuel distributor strip 2.
- Fig. 7 shows the in Fig. 5 illustrated arrangement 1 in a schematic representation according to a seventh embodiment.
- the fuel distributor 2 is likewise configured as a fuel distributor strip 2, which extends along the longitudinal axis 18.
- the damping composite element 8 extends along the longitudinal axis 18 of the fuel distributor 2 and is connected to the outer side 15 of the tubular base body 5 of the fuel distributor 2.
- a further damping composite element 8A is provided in this embodiment, which also extends along the longitudinal axis 18 of the fuel distributor 2 and is connected to the outer side 15 of the tubular base body 5 of the fuel distributor 2.
- damping composite element 8 in a bending shape is possible, which encloses the tubular body 5 of the fuel distributor 2 circumferentially at least substantially.
- the function of the two damping composite elements 8, 8A can then be achieved by a single damping composite element 8.
- suitable recesses for rail cups or leading to the fuel injection valves connecting lines are required.
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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
Die Erfindung betrifft eine Anordnung, insbesondere eine Brennstoffeinspritzanlage zur Hochdruckeinspritzung bei Brennkraftmaschinen, mit einem Brennstoffverteiler und zumindest einem Halter, der zum Befestigen des Brennstoffverteilers an einer Anbaustruktur, insbesondere der Brennkraftmaschine, dient (
Aus der
Die aus
Die erfindungsgemäße Anordnung mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass eine verbesserte Schwingungsdämpfung über die Lebensdauer gewährleistet ist. Speziell ergibt sich der Vorteil, dass eine ausreichende Geräuschdämpfung auch nach einer hohen Betriebsdauer gewährleistet ist.The arrangement according to the invention with the features of claim 1 has the advantage that an improved vibration damping over the life is guaranteed. Specifically, there is the advantage that a sufficient noise attenuation is ensured even after a long period of operation.
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 kann zum einen zur Verteilung des Brennstoffs auf mehrere Brennstoffeinspritzventile, insbesondere Hochdruckeinspritzventile, dienen. Zum anderen kann der Brennstoffverteiler als gemeinsamer Brennstoffspeicher für die Hochdruck-Einspritzventile dienen. Die Einspritzventile sind auf geeignete Weise mit dem Brennstoffverteiler verbunden und spritzen den zum Verbrennungsvorgang notwendigen Brennstoff dann 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 can serve for distributing the fuel to a plurality of fuel injection valves, in particular high-pressure injection valves. On the other hand, the fuel distributor can serve as a common fuel storage for the high-pressure injectors. The injection valves are suitably connected to the fuel distributor and then 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 Halter zum Befestigen des Brennstoffverteilers an der Brennkraftmaschine oder auch einer sonstigen Anbaustruktur dienen. Die Anbaustruktur, insbesondere die Brennkraftmaschine, ist hierbei nicht notwendigerweise Bestandteil der Anordnung. Insbesondere kann die Anordnung, insbesondere die Brennstoffeinspritzanlage, auch unabhängig von einer Anbaustruktur beziehungsweise einer Brennkraftmaschine hergestellt und vertrieben werden.The arrangement may be configured in an advantageous manner as a fuel injection system. Here, the holder can serve for fastening the fuel distributor to the internal combustion engine or other mounting structure. The mounting structure, in particular the internal combustion engine, is not necessarily part of the arrangement. In particular, the arrangement, in particular the fuel injection system, can also be manufactured and distributed independently of a mounting structure or an internal combustion engine.
Der Brennstoffverteiler kann im Betrieb zu Schwingungen im hörbaren Frequenzbereich angeregt werden. Dies kann vor allem durch Geräuschquellen in den Hochdruck-Einspritzventilen, die Bestandteil der Brennstoffeinspritzanlage sein können, geschehen. Der Körperschall breitet sich hierbei von den Hochdruck-Einspritzventilen beispielsweise über Railtassen, den Brennstoffverteiler und einen oder mehrere Halter auf die Anbaustruktur aus, von wo störende Geräusche abgestrahlt werden können, die unter Umständen sogar bis ins Innere des Fahrzeugs dringen. Durch das Dämpfungsverbundelement können solche störenden Geräusche jedoch gedämpft werden. Dadurch kann insbesondere eine Geräuschbelästigung im Inneren des Fahrzeugs verhindert werden.The fuel distributor can be excited during operation to oscillations in the audible frequency range. This can be done mainly by noise sources in the high pressure injectors, which may be part of the fuel injection system. In this case, the structure-borne sound propagates from the high-pressure injection valves, for example via rail cups, the fuel distributor and one or more holders, to the mounting structure, from where disturbing noises can be emitted, which may even penetrate into the interior of the vehicle. By means of the damping composite element, however, such disturbing noises can be damped. As a result, in particular a noise nuisance inside the vehicle can be prevented.
Die Anbaustruktur kann in vorteilhafter Weise durch einen Zylinderkopf der Brennkraftmaschine gebildet sein. Es kann jedoch auch eine Anbindung über Distanzhülsen oder über weitere Verbindungselemente vorgesehen sein. Auch von einer Außenseite des Brennstoffverteilers kann prinzipiell direkt störender Luftschall abgestrahlt werden, insbesondere wenn der Brennstoffverteiler exponiert an einer Motorstruktur angebracht ist. Durch Verbinden des Dämpfungsverbundelements mit dem Brennstoffverteiler kann diesbezüglich eine Geräuschdämpfung gewährleistet werden.The mounting structure can be advantageously formed by a cylinder head of the internal combustion engine. However, it can also be provided via a connection spacers or other connecting elements. In principle, directly disturbing airborne sound can also be radiated from an outside of the fuel distributor, in particular if the fuel distributor is exposed to a motor structure. By connecting the damping composite element with the fuel distributor, a noise damping can be ensured in this regard.
Somit kann in Bezug auf den jeweiligen Anwendungsfall durch ein oder mehrere Dämpfungsverbundelemente eine vorteilhafte Geräuschdämpfung erzielt werden. Die Dämpfung kann hierbei je nach Anwendungsfall im Bereich des Halters, im Bereich des Brennstoffverteilers oder sowohl im Bereich des Halters und im Bereich des Brennstoffverteilers erfolgen.Thus, with respect to the particular application by one or more damping composite elements, an advantageous noise attenuation can be achieved. Depending on the application, the damping can be effected in the region of the holder, in the region of the fuel distributor or both in the region of the holder and in the region of the fuel distributor.
Ein weiterer Vorteil besteht darin, dass das Dämpfungsverbundelement nicht notwendigerweise durch eine Vorspannung beaufschlagt ist. Gegebenenfalls wird das Dämpfungsverbundelement auch nur lokal im Bereich einer Befestigungsstelle beaufschlagt. Somit sieht die elastisch verformbare Dämpfungsschicht keine Vorspannung. Dies wirkt sich günstig auf die Geräuschdämpfung über die Lebensdauer aus. Außerdem besteht ein größerer Freiheitsgrad für die Wahl des Werkstoffs für die elastisch verformbare Dämpfungsschicht.Another advantage is that the damping composite element is not necessarily biased by a bias. Optionally, the damping composite element is also applied only locally in the region of an attachment point. Thus, the elastically deformable damping layer sees no bias. This has a favorable effect on the noise damping over the service life. In addition, there is a greater degree of freedom for the choice of material for the elastically deformable damping layer.
Die Dämpfungsverbundelemente ermöglichen außerdem eine schwingungstechnische Dämpfung, ohne dass die festigkeits- und funktionsrelevante steife Anbindung des Brennstoffverteilers über den Halter an die Anbaustruktur im Vergleich zu einer fest verschraubten Verbindung verringert werden muss. Bei einer effektiven Ausführung, die insbesondere durch eine Überdeckung an blechförmig ausgestalteten Haltern realisiert sein kann, kann gleichzeitig auch eine Reduzierung der in die Anbaustruktur, insbesondere den Zylinderkopf, übertragenen Körperschallanteile realisiert werden. Hierdurch kann eine strukturdynamische Teilentkoppelung gewährleistet werden.The damping composite elements also allow a vibration damping, without the strength and function relevant rigid connection of the fuel distributor must be reduced via the holder to the mounting structure in comparison to a firmly screwed connection. In an effective embodiment, which can be realized in particular by an overlap on sheet-metal configured holders, at the same time a reduction of the transmitted into the mounting structure, in particular the cylinder head, structure-borne sound components can be realized. As a result, a structurally dynamic partial decoupling can be ensured.
Die Dämpfungsverbundelemente können in ihrer Größe und Anzahl an den jeweiligen Anwendungsfall angepasst werden. Hierdurch können hohe Anforderungen hinsichtlich der Geräuschemission zur akustischen Verbesserung erfüllt werden. Hierbei kann eine starke Bedämpfung von Schwingungsformen des Brennstoffverteilers und der damit einhergehenden Amplitudenreduzierung dieser Schwingungsformen erzielt werden. Die Dämpfungsverbundelemente können hierbei oberflächlich aufgebracht werden. Die elastisch verformbare Dämpfungsschicht kann als Elastomerschicht ausgestaltet sein und eine Verbindung der Dämpfungsschicht mit zumindest einer Metallschicht des Dämpfungsverbundelements beziehungsweise einer angrenzenden Außenseite des Brennstoffverteilers kann durch Aufvulkanisieren hergestellt werden. Dadurch kann eine hohe Bedämpfung der Schwingungen mit einer hohen Zuverlässigkeit kombiniert werden. Somit kann die Dämpfungsschicht des Dämpfungsverbundelements durch Vulkanisieren mit dem Halter und/oder dem Brennstoffverteiler verbunden sein. Die Dämpfungsschicht ist hierbei in vorteilhafter Weise aus einem auf einem Gummi basierenden Werkstoff gebildet. Der Begriff des Gummis ist hierbei allgemein zu verstehen und umfasst neben einem Naturkautschuk auch synthetische Gummiwerkstoffe.The damping composite elements can be adapted in size and number to the particular application. As a result, high noise emission requirements for acoustic improvement can be met. This can be a strong damping of vibration modes of the fuel distributor and the so accompanying amplitude reduction of these waveforms can be achieved. The damping composite elements can be applied superficially. The elastically deformable damping layer can be designed as an elastomer layer and a connection of the damping layer with at least one metal layer of the damping composite element or an adjacent outer side of the fuel distributor can be produced by vulcanization. Thereby, a high damping of the vibrations can be combined with a high reliability. Thus, the damping layer of the damping composite element can be connected by vulcanization with the holder and / or the fuel distributor. The damping layer is formed here in an advantageous manner from a rubber-based material. The term rubber is to be understood generally and includes synthetic rubber as well as natural rubber.
Erfindungsgemäß ist der Halter stoffschlüssig mit dem Brennstoffverteiler verbunden. Hierbei kann der Halter mit dem Brennstoffverteiler in vorteilhafter Weise verlötet sein. Das Ausgestalten der Lötverbindung kann hierbei im Durchlaufofen erfolgen. Nachgeordnet kann das Dämpfungsverbundelement mit dem Halter und/oder dem Brennstoffverteiler verbunden werden. Somit ist eine Beeinträchtigung des Werkstoffs der Dämpfungsschicht durch den Lötprozess von vornherein verhindert. Es sind auch andere Möglichkeiten zur Verbindung des Halters mit dem Brennstoffverteiler denkbar, insbesondere durch Verschweißen.According to the invention, the holder is integrally connected to the fuel distributor. Here, the holder can be soldered to the fuel distributor in an advantageous manner. The design of the solder joint can be carried out in a continuous furnace. Downstream, the damping composite element can be connected to the holder and / or the fuel distributor. Thus, a deterioration of the material of the damping layer is prevented by the soldering process from the outset. There are also other ways to connect the holder with the fuel distributor conceivable, in particular by welding.
Das Dämpfungsverbundelement kann in vorteilhafter Weise in einer Sandwichbauweise ausgestaltet sein. Hierbei können ein oder mehrere Dämpfungsschichten mit einer oder mehreren Metallschichten zu einem Verbund zusammengefügt werden. Die Metallschichten und die Dämpfungsschichten wechseln sich hierbei vorzugsweise ab und sind auf geeignete Weise miteinander verbunden.The damping composite element can advantageously be designed in a sandwich construction. In this case, one or more damping layers can be combined with one or more metal layers to form a composite. The metal layers and the damping layers in this case preferably alternate and are connected to one another in a suitable manner.
Durch das Dämpfungsverbundelement kann in vorteilhafter Weise ein mechanisches Wirkprinzip zur Schwingungsreduzierung realisiert werden. Zwischen zwei oder mehreren Metallschichten können hierbei eine oder mehrere vorzugsweise viskoelastische Dämpfungsschichten einlaminiert oder vulkanisiert werden. Die Metallschichten können hierbei aus Metallblechen hergestellt werden. Unter Relativverschiebungen beziehungsweise Schwingungen der Metallschichten, wie sie insbesondere bei Biegeschwingungen auftreten, wird die dazwischen liegende elastisch verformbare Dämpfungsschicht dynamisch stark beansprucht. Ein hoher Teil an Vibrationsenergie wird dadurch über die Materialdämpfung des Werkstoffs der Dämpfungsschicht dissipiert. Die Dissipation von Körperschallenergie führt somit zu einer Bedämpfung von Schwingungsformen des Brennstoffverteilers und damit indirekt zu einer Reduzierung des damit verbundenen Luftschalls. Außerdem können die zugehörigen Körperschallanteile reduziert werden, die über die Schwingungsformen an den Haltern und somit vom Brennstoffverteiler in die Anbaustruktur übertragen werden. Dies entspricht einer Teilisolation des Brennstoffverteilers gegenüber der Anbaustruktur.By the damping composite element can be realized advantageously a mechanical action principle for vibration reduction. In this case, one or more preferably viscoelastic damping layers can be laminated or vulcanized between two or more metal layers. The metal layers can be produced here from metal sheets. Under relative displacements or oscillations of the metal layers, as they occur in particular during flexural vibrations, the elastically deformable damping layer lying between them is stressed dynamically. A high proportion of vibration energy is thereby dissipated via the material damping of the material of the damping layer. The dissipation of body sound energy thus leads to a damping of vibration modes of the fuel distributor and thus indirectly to a reduction of the associated airborne sound. In addition, the associated structure-borne sound components can be reduced, which are transmitted via the waveforms on the holders and thus from the fuel distributor in the mounting structure. This corresponds to a partial insulation of the fuel distributor with respect to the mounting structure.
Die Eigenschaften der elastisch verformbaren Dämpfungsschicht, insbesondere eine Dicke oder die Werkstoffeigenschaften, können hinsichtlich einiger Optimierungsparameter, insbesondere der zu dämpfenden Frequenzinhalte und der Temperatur, angepasst werden. Die Dämpfungsschicht kann aus einem Gummi, insbesondere einem Naturkautschuk oder einem synthetischen Gummi, ausgestaltet sein. Die Dämpfungsschicht kann auch aus einem Polymer, insbesondere einem thermoplastischen Elastomer oder einem reinen Thermoplasten, ausgestaltet sein. Wenn mehrere Dämpfungsschichten vorgesehen sind, dann kann durch eine Kombination unterschiedlicher Werkstoffe eine weitere Anpassung der Eigenschaften des Dämpfungsverbundelements an den jeweiligen Anwendungsfall erfolgen.The properties of the elastically deformable damping layer, in particular a thickness or the material properties, can be adjusted with regard to some optimization parameters, in particular the frequency contents to be damped and the temperature. The damping layer may be made of a rubber, in particular a natural rubber or a synthetic rubber. The damping layer may also be made of a polymer, in particular a thermoplastic elastomer or a pure thermoplastic. If a plurality of damping layers are provided, then a further adaptation of the properties of the damping composite element to the respective application can be achieved by a combination of different materials.
Die Dämpfungsverbundelemente können hinsichtlich ihrer geometrischen Ausgestaltung an eine Vielzahl von unterschiedlichen Brennstoffverteilern und Haltern angepasst werden. Besonders vorteilhaft ist es, dass der Halter als blechförmiger Halter und/oder als Brücke ausgestaltet ist. Das Dämpfungsverbundelement kann dann vollflächig mit einer Oberseite des Halters verbunden sein. Somit ergibt sich eine besonders hohe Dämpfungswirkung in Kombination mit einer flächenhaften, dünnwandigen Grundstruktur aus dem Halter und dem Dämpfungsverbundelement. Hierbei kann eine starke Kopplung zwischen dem Dämpfungsverbundelement und dem Halter erzielt werden.The damping composite elements can be adapted in terms of their geometric design to a variety of different fuel manifolds and holders. It is particularly advantageous that the holder is configured as a plate-shaped holder and / or as a bridge. The damping composite element can then be connected over its entire surface to an upper side of the holder. This results in a particularly high damping effect in combination with a planar, thin-walled basic structure of the holder and the damping composite element. In this case, a strong coupling between the damping composite element and the holder can be achieved.
Die Ausgestaltung des Dämpfungsverbundelements kann hinsichtlich des Schichtaufbaus in vorteilhafter Weise an den jeweiligen Anwendungsfall angepasst werden. Gemäß einer vorteilhaften Ausgestaltung besteht das Dämpfungsverbundelement aus genau einer Metallschicht und einer mit der Metallschicht verbundenen elastisch verformbaren Dämpfungsschicht, insbesondere Elastomerschicht. Auf die Dämpfungsschicht wird eine Klebstoffschicht aufgebracht. Das Aufbringen der Klebstoffschicht kann auch vor einem Biege-Stanz-Schritt erfolgen, wodurch sich die Herstellung vereinfacht. Durch Verkleben des Dämpfungsverbundelements mit dem Halter und/oder dem Brennstoffverteiler bildet die dann gewissermaßen innenliegende Dämpfungsschicht eine dämpfende Einlageschicht.The configuration of the damping composite element can be adapted in terms of the layer structure in an advantageous manner to the particular application. According to an advantageous embodiment, the damping composite element consists of exactly one metal layer and an elastically deformable damping layer, in particular elastomer layer, connected to the metal layer. An adhesive layer is applied to the cushioning layer. The application of the adhesive layer can also be done before a bending-punching step, whereby the production is simplified. By gluing the damping composite element to the holder and / or the fuel distributor, the quasi-inner damping layer then forms a damping insert layer.
Gemäß einer weiteren vorteilhaften Ausgestaltung weist das Dämpfungsverbundelement eine innenliegende Dämpfungsschicht, insbesondere viskoelastische Dämpfungsschicht, auf. Das Dämpfungsverbundelement besteht hierbei vorzugsweise aus genau zwei Metallschichten und einer zum Halter beziehungsweise zum Brennstoffverteiler orientierten weiteren Dämpfungsschicht. Auf der zum Halter beziehungsweise Brennstoffverteiler orientierten Dämpfungsschicht ist zusätzlich eine Klebstoffschicht aufgebracht. Das Aufbringen der Klebstoffschicht kann hierbei bereits vor dem Biege-Stanz-Schritt erfolgen, wodurch sich die Herstellung vereinfacht. Über die Klebstoffschicht wird das Dämpfungsverbundelement mit dem Halter beziehungsweise dem Brennstoffverteiler verbunden.According to a further advantageous embodiment, the damping composite element on an inner damping layer, in particular viscoelastic damping layer, on. The damping composite element preferably consists of exactly two Metal layers and a holder or the fuel distributor oriented further damping layer. An adhesive layer is additionally applied to the damping layer oriented to the holder or fuel distributor. The application of the adhesive layer can in this case take place before the bending-punching step, whereby the production is simplified. About the adhesive layer, the damping composite element is connected to the holder or the fuel distributor.
Für die Verbindung des Dämpfungsverbundelements mit dem Halter beziehungsweise dem Brennstoffverteiler kommen unterschiedliche Fügekonzepte in Frage. Vorzugsweise wird das Dämpfungsverbundelement nach dem Lötprozess, bei dem der Halter mit dem Brennstoffverteiler verbunden wird, oberflächlich gefügt. Hierbei kann die Verbindung zwischen dem Dämpfungsverbundelement und dem Brennstoffverteiler beziehungsweise dem Halter durch eine aufgebrachte Klebeschicht erfolgen. Vorzugsweise wird hierbei auf das Dämpfungsverbundelement vorab eine Klebeschicht aufgebracht. Dann kann das Dämpfungsverbundelement mit der aufgebrachten Klebeschicht umformt und anschließend auf die Außenseite des Brennstoffverteilers beziehungsweise auf eine Oberseite des Halters aufgebracht und verklebt werden.For the connection of the damping composite element with the holder or the fuel distributor different joining concepts come into question. Preferably, the damping composite element is superficially joined after the soldering process in which the holder is connected to the fuel distributor. In this case, the connection between the damping composite element and the fuel distributor or the holder can be effected by an applied adhesive layer. Preferably, an adhesive layer is applied to the damping composite element in advance. Then, the damping composite element can be formed with the applied adhesive layer and then applied to the outside of the fuel distributor or on an upper side of the holder and glued.
Möglich ist auch eine Vulkanisation des Dämpfungsverbundelements auf der Oberseite des Halters beziehungsweise der Außenseite des Brennstoffverteilers. Hierbei wird das Dämpfungsverbundelement vorzugsweise umgeformt und dann in einer Vorrichtung gemeinsam mit dem Brennstoffverteiler sowie dem Halter fixiert, so dass ein Spalt zwischen den beiden Fügepartnern entsteht. Das Rohmaterial für die als Verbindungsschicht dienende Dämpfungsschicht wird dann in den Spalt geleitet und in einem nachgeschalteten Prozessschritt ausgehärtet. Hierbei kann insbesondere ein Elastomer-Rohmaterial zum Einsatz kommen. Die hierdurch gebildete Dämpfungsschicht ist dann Bestandteil des Dämpfungsverbundelements. Speziell kann bei dieser Ausgestaltung zunächst nur ein Metallblech oder dergleichen, das die Metallschicht bildet, bezüglich des Brennstoffverteilers und des Halters positioniert werden und anschließend kann durch Einleiten des Rohmaterials die elastisch verformbare Dämpfungsschicht des Dämpfungsverbundelements ausgestaltet werden. Bei dieser Ausgestaltung ermöglicht die Dämpfungsschicht dann eine vorteilhafte dämpfende Wirkung und bildet zugleich die Verbindung zu dem Brennstoffverteiler beziehungsweise dem Halter. Allerdings sind auch Abwandlungen bei der Herstellung möglich.It is also possible vulcanization of the damping composite element on the top of the holder or the outside of the fuel distributor. Here, the damping composite element is preferably deformed and then fixed in a device together with the fuel distributor and the holder, so that a gap between the two joining partners is formed. The raw material for the damping layer serving as the connecting layer is then passed into the gap and cured in a subsequent process step. In this case, in particular, an elastomeric raw material can be used. The damping layer formed thereby is then part of the damping composite element. Specifically, in this embodiment, at first, only a metal sheet or the like constituting the metal layer can be positioned with respect to the fuel distributor and the holder, and then, by introducing the raw material, the elastically deformable cushioning layer of the damping composite member can be configured. In this embodiment, the damping layer then allows an advantageous damping effect and at the same time forms the connection to the fuel distributor or the holder. However, modifications in the production are possible.
In vorteilhafter Weise können ein oder mehrere Dämpfungsverbundelemente in geeigneter geometrischer Ausgestaltung und geeigneter Positionierung auf dem Halter und/oder dem Brennstoffverteiler angebracht werden. Ein Dämpfungsverbundelement kann prinzipiell auf allen Oberflächen des Halters beziehungsweise des Brennstoffverteilers aufgebracht werden. Hierzu ist es vorteilhaft, dass das Dämpfungsverbundelement an die Außenkontur des Fügepartners angepasst ausgestaltet wird. Dies kann durch einen geeigneten Biege-Stanz-Prozess vorbereitet werden. Aus akustischer Sicht ist es vorteilhaft, dass die Dämpfungsverbundelemente auf dünne Halter aufgebracht werden. Die Halter können hierbei insbesondere durch dünne Metallbleche ausgestaltet sein. Der Überdeckungsgrad ist hierbei vorzugsweise möglichst groß. Insbesondere ist es vorteilhaft, dass ein Dämpfungsverbundelement die Oberseite des zugeordneten Halters zumindest näherungsweise vollflächig bedeckt. Vorteilhaft ist es auch, dass ein Halter vorgesehen ist, der aus einem großflächigen Blechzuschnitt in Form einer Brücke mit mehreren Befestigungspunkten besteht. Dies ermöglicht die Befestigung des Brennstoffverteilers mit einem einzigen Halter, auf den ein entsprechend ausgeformtes Dämpfungsverbundelement aufgebracht wird. Dadurch können auch durchgängige Schwingungsformen, beispielsweise Biegeschwingungen eines rohrförmigen Grundkörpers des Brennstoffverteilers, gedämpft werden. Die Dämpfungsverbundelemente können auch auf die Außenseite eines rohrförmigen Grundkörpers des Brennstoffverteilers aufgebracht werden, wobei sich diese dann vorzugsweise entlang der Längsachse des Brennstoffverteilers erstrecken und mit der Außenseite des Brennstoffverteilers verbunden sind. Somit kann sich bei dieser Ausgestaltung das Dämpfungsverbundelement zumindest im Wesentlichen über die gesamte Länge eines als Brennstoffverteilerleiste ausgestalteten Brennstoffverteilers erstrecken.Advantageously, one or more damping composite elements in a suitable geometric configuration and suitable positioning on the holder and / or the Fuel distributor are attached. A damping composite element can in principle be applied to all surfaces of the holder or of the fuel distributor. For this purpose, it is advantageous that the damping composite element is configured adapted to the outer contour of the joining partner. This can be prepared by a suitable bending-punching process. From an acoustic point of view, it is advantageous that the damping composite elements are applied to thin holders. The holders can in this case be designed in particular by thin metal sheets. The degree of coverage here is preferably as large as possible. In particular, it is advantageous for a damping composite element to cover the upper side of the associated holder at least approximately over its entire area. It is also advantageous that a holder is provided which consists of a large-area sheet metal blank in the form of a bridge with several attachment points. This allows the attachment of the fuel distributor with a single holder, on which a correspondingly shaped damping composite element is applied. As a result, continuous vibration modes, for example, bending vibrations of a tubular body of the fuel distributor, can be damped. The damping composite elements can also be applied to the outside of a tubular body of the fuel distributor, which then preferably extend along the longitudinal axis of the fuel distributor and are connected to the outside of the fuel distributor. Thus, in this embodiment, the damping composite element can extend at least substantially over the entire length of a fuel distributor designed as a fuel distributor strip.
Je nach Ausgestaltung der Anordnung, insbesondere der Brennstoffeinspritzanlage, ergeben sich somit wesentliche Vorteile. Durch den Einsatz der oberflächlich applizierten Dämpfungsverbundelemente mit mindestens einer elastisch verformbaren Dämpfungsschicht, insbesondere einer viskoelastischen Dämpfungsschicht, können Schwingungen des Brennstoffverteilers stärker gedämpft werden, wodurch die Schallabstrahlung von einer Außenseite des Brennstoffverteilers abnimmt.Depending on the configuration of the arrangement, in particular the fuel injection system, thus resulting in significant advantages. By using the superficially applied damping composite elements with at least one elastically deformable damping layer, in particular a viscoelastic damping layer, vibrations of the fuel distributor can be more strongly damped, whereby the sound radiation decreases from an outside of the fuel distributor.
Ferner können die Geräuschübertragungen vom Brennstoffverteiler in die Anbaustruktur reduziert werden. Hierdurch kann eine Teilentkopplung erzielt werden.Furthermore, the noise transmissions from the fuel distributor into the mounting structure can be reduced. As a result, a partial decoupling can be achieved.
Die Schwingungsbelastung des Brennstoffverteilers und der Hochdruck-Einspritzventile auf Grund der Schwingbelastung des Motors nimmt ab, da auch die Schwingungsübertragung in dieser Richtung gedämpft wird. Dadurch entstehen Vorteile hinsichtlich der Auslegung und Zuverlässigkeit dieser Komponenten.The vibration load of the fuel distributor and the high-pressure injectors due to the vibration load of the engine decreases, since the vibration transmission is attenuated in this direction. This results in advantages in terms of the design and reliability of these components.
Ferner kann das Dämpfungsverbundelement in einfacher Weise bei bestehenden Systemen zum Einsatz kommen, wobei keine oder nur geringfügige Anpassungen erforderlich sind. Somit ergibt sich ein breiter Anwendungsbereich.Furthermore, the damping composite element can easily be used in existing systems, with no or only minor adjustments are required. This results in a broad scope.
Vorteile hinsichtlich der mechanischen Stabilität und dergleichen, wie sie bei einer starren Verschraubung des Brennstoffverteilers möglich sind, können ebenfalls zumindest im Wesentlichen erzielt werden.Advantages in terms of mechanical stability and the like, as are possible with a rigid screw connection of the fuel distributor, can likewise be achieved at least substantially.
Außerdem kann ein bestehendes Montage- und Servicekonzept zumindest weitgehend unverändert übernommen werden, so dass eine kostengünstige Realisierung möglich ist.In addition, an existing assembly and service concept can be adopted at least largely unchanged, so that a cost-effective implementation is possible.
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:
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Fig. 1 eine Anordnung mit einem Brennstoffverteiler und einem Halter, der zum Befestigen des Brennstoffverteilers an einer Anbaustruktur dient, in einer auszugsweisen, schematischen Schnittdarstellung entsprechend einem ersten Ausführungsbeispiel der Erfindung; -
Fig. 2 ein Dämpfungsverbundelement und einen Halter der inFig. 1 dargestellten Anordnung in einer auszugsweisen, schematischen Schnittdarstellung entsprechend einem zweiten Ausführungsbeispiel der Erfindung; -
Fig. 3 das inFig. 2 dargestellte Dämpfungsverbundelement und den Halter in einer auszugsweisen, schematischen Schnittdarstellung entsprechend einem dritten Ausführungsbeispiel der Erfindung; -
Fig. 4 die inFig. 1 dargestellte Anordnung in einer auszugsweisen, schematischen Schnittdarstellung entsprechend einem vierten Ausführungsbeispiel der Erfindung; -
Fig. 5 die inFig. 1 dargestellte Anordnung aus der mit V bezeichneten Blickrichtung in einer schematischen Darstellung entsprechend einem fünften Ausführungsbeispiel der Erfindung; -
Fig. 6 die inFig. 5 dargestellte Anordnung in einer schematischen Darstellung entsprechend einem sechsten Ausführungsbeispiel der Erfindung und -
Fig. 7 die inFig. 5 dargestellte Anordnung in einer schematischen Darstellung entsprechend einem siebten Ausführungsbeispiel der Erfindung.
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Fig. 1 an arrangement with a fuel distributor and a holder, which serves for attaching the fuel distributor to a mounting structure, in an extract, schematic sectional view according to a first embodiment of the invention; -
Fig. 2 a damping composite element and a holder of theFig. 1 arrangement shown in a partial, schematic sectional view according to a second embodiment of the invention; -
Fig. 3 this inFig. 2 shown damping composite element and the holder in a partial, schematic sectional view according to a third embodiment of the invention; -
Fig. 4 in theFig. 1 illustrated arrangement in an excerpt, schematic sectional view according to a fourth embodiment of the invention; -
Fig. 5 in theFig. 1 illustrated arrangement of the V direction of view in a schematic representation according to a fifth embodiment of the invention; -
Fig. 6 in theFig. 5 illustrated arrangement in a schematic representation according to a sixth embodiment of the invention and -
Fig. 7 in theFig. 5 illustrated arrangement in a schematic representation according to a seventh embodiment of the invention.
Der Brennstoffverteiler 2 weist in diesem Ausführungsbeispiel einen rohrförmigen Grundkörper 5 auf. Der Brennstoffverteiler 2 ist hierbei als Brennstoffverteilerleiste 2 ausgestaltet, die eine unter hohem Druck stehende Brennstoffmenge speichert und zu mehreren nicht dargestellten Brennstoffeinspritzventilen führt. Der Halter 3 ist auf geeignete Weise mit dem Brennstoffverteiler 2 verbunden. In diesem Ausführungsbeispiel ist der Halter 3 mit dem Brennstoffverteiler 2 verlötet, wobei zur Veranschaulichung Lötstellen 6, 7 dargestellt sind. Das Verlöten kann hierbei in einem Durchlaufofen erfolgen.The
Die Anordnung 1 weist außerdem ein Dämpfungsverbundelement 8 auf. Das Dämpfungsverbundelement 8 ist mit dem Halter 3 verbunden. Die Verbindung des Dämpfungsverbundelements 8 mit dem Halter 3 erfolgt vorzugsweise nach dem Herstellen der Verbindung zwischen dem Halter 3 und dem Brennstoffverteiler 2. Dadurch wird eine thermische Beeinträchtigung des Dämpfungsverbundelements 8 verhindert.The arrangement 1 also has a damping composite element 8. The damping composite element 8 is connected to the
Das Dämpfungsverbundelement 8 weist in diesem Ausführungsbeispiel eine Metallschicht 9, die zumindest im Wesentlichen aus einem metallischen Werkstoff gebildet ist, eine elastisch verformbare Dämpfungsschicht 10 und eine weitere Metallschicht 11 auf, die zumindest im Wesentlichen aus einem metallischen Werkstoff gebildet ist. Die Dämpfungsschicht 10 ist in diesem Ausführungsbeispiel zwischen den Metallschichten 9, 11 angeordnet. Die Dämpfungsschicht 10 ist einerseits mit der Metallschicht 9 und andererseits mit der Metallschicht 11 verbunden. Die Verbindung der Dämpfungsschicht 10 mit den Metallschichten 9, 11 kann durch Laminieren oder Vulkanisieren erfolgen. Außerdem ist zwischen dem Dämpfungsverbundelement 8 und dem Halter 3 eine Klebstoffschicht 12 vorgesehen. Die Klebstoffschicht 12 kann hierbei zunächst auf das Dämpfungsverbundelement 8 aufgebracht werden. Dann kann das Dämpfungsverbundelement 8 mit der Klebstoffschicht 12 zunächst zugeschnitten werden, beispielsweise über einen Stanzprozess, und dann mit einer Oberseite 13 des Halters 3 verbunden werden.The damping composite element 8 has in this embodiment, a metal layer 9, which is at least substantially formed of a metallic material, an elastically deformable damping layer 10 and a further metal layer 11, which is at least substantially formed of a metallic material. The damping layer 10 is arranged in this embodiment between the metal layers 9, 11. The damping layer 10 is connected on the one hand to the metal layer 9 and on the other hand to the metal layer 11. The compound of the damping layer 10 with the metal layers 9, 11 can be made by lamination or vulcanization. In addition, an
Der Halter 3 ist vorzugsweise aus einem Metallblech gebildet. Das Dämpfungsverbundelement 8 wird vorzugsweise vollflächig mit der Oberseite 13 des Halters 3 verbunden. Dementsprechend ist in diesem Ausführungsbeispiel auch die Klebstoffschicht 12 möglichst vollflächig zwischen dem Dämpfungsverbundelement 8 und dem Halter 3 ausgestaltet.The
Die Befestigung des Brennstoffverteilers 2 an der Anbaustruktur 4 kann über ein oder mehrere Befestigungsmittel 14 erfolgen. Das Befestigungsmittel 14 kann insbesondere als Schraube 14 ausgestaltet sein.The fastening of the
Somit können die Dämpfungsschicht 10 und die Metallschichten 9, 11 stoffschlüssig miteinander verbunden sein. Außerdem kann über die Klebstoffschicht 12 eine Verbindung des Dämpfungsverbundelements 8 mit der Oberseite 13 des Halters 3 erzielt werden. In diesem Ausführungsbeispiel wird hierbei die Metallschicht 9 des Dämpfungsverbundelements 8 über die Klebstoffschicht 12 mit der Oberseite 13 des Halters 3 verbunden.Thus, the damping layer 10 and the metal layers 9, 11 may be integrally connected to each other. In addition, via the
In entsprechender Weise kann ein Dämpfungsverbundelement 8 auch mit dem Brennstoffverteiler 2 verbunden werden. Speziell kann ein Dämpfungsverbundelement 8 auch auf eine Außenseite 15 des rohrförmigen Grundkörpers 5 aufgebracht werden. Auch eine Aufbringung sowohl auf den Halter 3 als auch auf den Brennstoffverteiler 2 ist möglich. In diesem Fall ist das Dämpfungsverbundelement 8 dann teilweise mit der Außenseite 15 des Brennstoffverteilers 2 und teilweise mit der Oberseite 13 des Halters 3 verbunden. Ferner kann ein Dämpfungsverbundelement 8 auch an einer Unterseite 16 des Halters 3 angebracht werden. Des Weiteren können auch mehrere Dämpfungsverbundelemente 8 mit dem Brennstoffverteiler 2 und/oder dem Halter 3 verbunden werden.In a corresponding manner, a damping composite element 8 can also be connected to the
In entsprechender Weise kann ein Dämpfungsverbundelement 8 mit mehreren Metallschichten 9, 11 und mehreren Dämpfungsschichten 10, 17 ausgestaltet werden. Hierdurch ist eine Anpassung an den jeweiligen Anwendungsfall möglich. Die Metallschichten 9, 11 können hierbei gegebenenfalls auch aus unterschiedlichen metallischen Werkstoffen gebildet sein. Die Dämpfungsverbundelemente 8, 17 können insbesondere aus einem auf Gummi oder einem Polymer basierenden Werkstoff gebildet sein. Hierbei können die Dämpfungsschichten 10, 17 auch aus unterschiedlichen Werkstoffen gebildet sein.In a corresponding manner, a damping composite element 8 having a plurality of metal layers 9, 11 and a plurality of damping layers 10, 17 can be configured. As a result, an adaptation to the particular application is possible. If appropriate, the metal layers 9, 11 can also be formed from different metallic materials. The damping composite elements 8, 17 may in particular be formed from a material based on rubber or a polymer. In this case, the damping layers 10, 17 may also be formed of different materials.
Somit kann die Dämpfungsschicht 10 des Dämpfungsverbundelements 8 durch Vulkanisieren mit dem Halter 3 verbunden sein.Thus, the cushion layer 10 of the cushion composite member 8 may be bonded to the
Außerdem sind weitere Halter 3A, 3B vorgesehen. Die Oberseiten 13A, 13B der weiteren Halter 3A, 3B sind näherungsweise vollflächig mit weiteren Dämpfungsverbundelementen 8A, 8B versehen. Somit ist an einem jeden Halter 3, 3A, 3B eine Schwingungsdämpfung gewährleistet. Über weitere Befestigungsmittel 14A, 14B sind die Halter 3A, 3B an der Anbaustruktur 4 angeschraubt.In addition,
Die Halter 3, 3A, 3B sind entlang einer Längsachse 18 verteilt an dem rohrförmigen Grundkörper 5 angeordnet und mit dem rohrförmigen Grundkörper 5 verlötet.The
Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt.The invention is not limited to the described embodiments.
Claims (12)
- Arrangement (1), in particular fuel injection system for high-pressure injection in internal combustion engines, having a fuel distributor (2) and having at least one holder (3) which serves for the fastening of the fuel distributor (2) to a mounting structure (4),
wherein at least one damping composite element (8) is provided, and the damping composite element (8) has at least one metal layer (9), which is formed at least substantially from a metallic material, and at least one elastically deformable damping layer (10), characterized
in that the holder (3) is formed from a metal sheet and the holder (3) is cohesively connected to the fuel distributor (2) by brazing or welding, and in that the at least one damping composite element (8) is connected to the holder (3), wherein the damping composite element (8) is connected over approximately its full area to a top side (13) of the holder (3). - Arrangement according to Claim 1,
characterized
in that the metal layer (9) and the damping layer (10) are cohesively connected to one another. - Arrangement according to Claim 1 or 2,
characterized in that the metal layer (9) of the damping composite element (8) is connected to the holder (3) and/or to the fuel distributor (2) by way of an adhesive layer (12). - Arrangement according to Claim 1 or 2,
characterized
in that the damping layer (10) of the damping composite element (8) is connected to the holder (3) and/or to the fuel distributor (2) by way of an adhesive layer (12). - Arrangement according to Claim 1 or 2,
characterized
in that the damping layer (10) of the damping composite element (8) is connected to the holder (3) and/or to the fuel distributor (2) by vulcanization. - Arrangement according to one of Claims 1 to 5,
characterized
in that the damping layer (10) is formed from a rubber-based material. - Arrangement according to one of Claims 1 to 6,
characterized
in that the holder (3) is cohesively connected to the fuel distributor (2). - Arrangement according to one of Claims 1 to 7,
characterized in that the damping composite element (8) has at least one further metal layer (11), which is formed at least substantially from a metallic material, and/or at least one further elastically deformable damping layer (17), which is formed from a rubber-based or polymer-based material. - Arrangement according to one of Claims 1 to 8,
characterized
in that the fuel distributor (2) is designed as a fuel distributor rail (2), and in that at least one damping composite element (8) extends along a longitudinal axis (18) of the fuel distributor (2) and is connected to an outer side (15) of the fuel distributor (2). - Method for producing an arrangement (1), in particular of a fuel injection system for high-pressure injection in internal combustion engines, having a fuel distributor (2) and having at least one holder (3) which serves for the fastening of the fuel distributor (2) to a mounting structure (4), wherein at least one damping composite element (8) is provided,
characterized
in that, in a first method step, the holder (3), which is formed from a metal sheet, is cohesively connected to the fuel distributor (2) by brazing or welding, and in that, subsequently, in a second method step, the at least one damping composite element (8) is connected over approximately its full area to a top side (13) of the holder (3), wherein the damping composite element (8) has at least one metal layer (9), which is formed at least substantially from a metallic material, and at least one elastically deformable damping layer (10). - Method according to Claim 10, characterized in that the connection of the damping layer (10) to the at least one metal layer (9, 11) is realized by lamination or vulcanization.
- Method according to Claim 10 or 11, characterized in that an adhesive layer (12) is provided between the damping composite element (8) and the holder (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13161900T PL2657503T3 (en) | 2012-04-26 | 2013-04-02 | Assembly with a fuel distributor and a holder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012206931A DE102012206931A1 (en) | 2012-04-26 | 2012-04-26 | Arrangement with a fuel distributor and a holder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2657503A1 EP2657503A1 (en) | 2013-10-30 |
EP2657503B1 true EP2657503B1 (en) | 2016-01-13 |
Family
ID=48087391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13161900.9A Not-in-force EP2657503B1 (en) | 2012-04-26 | 2013-04-02 | Assembly with a fuel distributor and a holder |
Country Status (5)
Country | Link |
---|---|
US (1) | US9970402B2 (en) |
EP (1) | EP2657503B1 (en) |
DE (1) | DE102012206931A1 (en) |
ES (1) | ES2563462T3 (en) |
PL (1) | PL2657503T3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012206937A1 (en) * | 2012-04-26 | 2013-10-31 | Robert Bosch Gmbh | Arrangement with a fuel distributor and a holder |
DE102012206890A1 (en) * | 2012-04-26 | 2013-10-31 | Robert Bosch Gmbh | Arrangement with a fuel distributor and a plurality of fuel injection valves |
DE102013217810A1 (en) * | 2013-09-06 | 2015-03-12 | Robert Bosch Gmbh | Holder for fixing a fuel distributor to an internal combustion engine and connection method |
US10190557B2 (en) * | 2015-09-14 | 2019-01-29 | Denso International America, Inc. | Fuel injector mounting device and fuel rail |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05293924A (en) * | 1990-12-28 | 1993-11-09 | Nippon Paint Co Ltd | Damping composite metal panel and production thereof |
US5752487A (en) * | 1997-06-11 | 1998-05-19 | Caterpillar Inc. | Injector combustion gas seal |
US6340019B1 (en) * | 2000-09-11 | 2002-01-22 | Delphi Technologies, Inc. | Fuel rail mounting bracket with isolator |
WO2002068508A1 (en) * | 2001-02-23 | 2002-09-06 | The Gates Corporation | Process for directly bonding rubber to at least a second substrate, and the resulting article |
DE102005009740A1 (en) | 2005-03-03 | 2006-09-07 | Robert Bosch Gmbh | Fuel injection device for internal combustion engine, has connecting body arranged so that valve and body are placed at surfaces of hole of cylinder head, and damping plates in connecting area of pipeline for uncoupling valve from head |
US7591246B2 (en) * | 2006-01-17 | 2009-09-22 | Gm Global Technology Operations, Inc. | Isolated fuel delivery system |
US7293550B2 (en) * | 2006-01-31 | 2007-11-13 | Gm Global Technology Operations, Inc. | Fuel injector isolation seat |
FR2909420B1 (en) * | 2006-11-30 | 2012-01-27 | Renault Sas | BARRIER DAMPING THE VIBRATION OF INJECTION PIPES ON AN INTERNAL COMBUSTION ENGINE |
JP4959390B2 (en) * | 2007-03-22 | 2012-06-20 | 東海ゴム工業株式会社 | Fluid filled vibration isolator |
FR2920488A1 (en) * | 2007-09-04 | 2009-03-06 | Peugeot Citroen Automobiles Sa | INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE COMPRISING SUCH AN INJECTION DEVICE. |
US8276528B1 (en) * | 2008-03-17 | 2012-10-02 | Daniel Richard Higgins | Pneumatic fuel distributor for solid fuel boilers |
DE102008044165A1 (en) * | 2008-11-28 | 2010-06-02 | Robert Bosch Gmbh | Fuel distributor |
US7980226B2 (en) * | 2009-03-30 | 2011-07-19 | Hitachi, Ltd | Fuel system for a direct injection engine |
US8307809B2 (en) * | 2009-09-29 | 2012-11-13 | GM Global Technology Operations LLC | Engine assembly including cam cover mounted fuel rail |
US8739763B2 (en) * | 2011-02-16 | 2014-06-03 | Hitachi Automotive Systems Americas Inc. | Fuel injector assembly |
US8875681B2 (en) * | 2011-10-28 | 2014-11-04 | Robert Bosch Gmbh | Fuel rail mounting arrangement |
US8800534B2 (en) * | 2011-11-18 | 2014-08-12 | Robert Bosch Gmbh | Fuel rail mounting arrangement |
DE102012206890A1 (en) * | 2012-04-26 | 2013-10-31 | Robert Bosch Gmbh | Arrangement with a fuel distributor and a plurality of fuel injection valves |
DE102012210369A1 (en) * | 2012-06-20 | 2013-12-24 | Robert Bosch Gmbh | Holder for fixing a fuel distributor to an internal combustion engine and fuel injection system with such a holder. |
US8844502B2 (en) * | 2012-07-24 | 2014-09-30 | Ford Global Technologies, Llc | Fuel rail mount |
US8701632B2 (en) * | 2012-07-24 | 2014-04-22 | Ford Global Technologies, Llc | Fuel injector mount |
JP5622826B2 (en) * | 2012-11-08 | 2014-11-12 | 本田技研工業株式会社 | Fuel pipe mounting structure |
-
2012
- 2012-04-26 DE DE102012206931A patent/DE102012206931A1/en not_active Withdrawn
-
2013
- 2013-04-02 ES ES13161900.9T patent/ES2563462T3/en active Active
- 2013-04-02 EP EP13161900.9A patent/EP2657503B1/en not_active Not-in-force
- 2013-04-02 PL PL13161900T patent/PL2657503T3/en unknown
- 2013-04-26 US US13/871,561 patent/US9970402B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE102012206931A1 (en) | 2013-10-31 |
EP2657503A1 (en) | 2013-10-30 |
US9970402B2 (en) | 2018-05-15 |
US20130284152A1 (en) | 2013-10-31 |
PL2657503T3 (en) | 2016-06-30 |
ES2563462T3 (en) | 2016-03-15 |
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