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EP2203639B1 - Fuel injection device - Google Patents

Fuel injection device Download PDF

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Publication number
EP2203639B1
EP2203639B1 EP07857303.7A EP07857303A EP2203639B1 EP 2203639 B1 EP2203639 B1 EP 2203639B1 EP 07857303 A EP07857303 A EP 07857303A EP 2203639 B1 EP2203639 B1 EP 2203639B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
fuel
pressure wave
wave conductor
injection device
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
EP07857303.7A
Other languages
German (de)
French (fr)
Other versions
EP2203639A1 (en
Inventor
Michael Fischer
Ulrich Fischer
Peter Lang
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
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Filing date
Publication date
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Publication of EP2203639A1 publication Critical patent/EP2203639A1/en
Application granted granted Critical
Publication of EP2203639B1 publication Critical patent/EP2203639B1/en
Active legal-status Critical Current
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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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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

Definitions

  • the invention relates to a fuel injection device according to the preamble of the main claim.
  • the fuel injection device comprises a plurality of fuel injection valves, a receiving bore in the cylinder head for each fuel injection valve and a respective connection piece of a fuel distributor line, which serves to supply the fuel injection valves with fuel.
  • the fuel injection valve is inserted into the relatively massive connecting piece of the fuel distributor line and sealed by means of a sealing ring.
  • the connecting piece is made in one piece from the actual fuel distributor line.
  • the fuel distribution line is firmly connected to the cylinder head, for example, by screwing. Between the connection piece of the fuel distributor line and the fuel injection valve, a bow-shaped holding-down device is clamped.
  • the hold-down device has a part-ring-shaped basic element, from which an axially compliant hold-down bar extends, which has at least two webs.
  • the fuel injector is particularly suitable for use in fuel injection systems of mixture-compression spark-ignition internal combustion engines. In operation, proportional hydraulic forces are built up against the fuel injection valve and the fuel distributor line via the fuel pressure of the cross-sectional area present in the connecting piece, which can damage the sealing ring and act as a structure-borne noise on the Motor structure can be transmitted and thus lead to unwanted sound radiation ( FIG. 1 ). From the JP2002115631 a fuel injector is known wherein the dynamic pressure fluctuations in the fuel during opening and closing of the fuel valve are avoided by a flexible surface of the fuel rail.
  • the fuel injection device with the characterizing features of claim 1 has the advantage that an improved seal is created by simple measures on the fuel injector and the connecting piece of the fuel rail and a reduced noise is achieved.
  • the dynamic pressure changes in the fuel during opening and closing of the fuel injection valve are largely kept away from the connection piece by being passed through the connection piece directly into the fuel distribution line without triggering dynamic pressure fluctuations in the volume of the connection piece. This is done with a pressure wave guide, which ensures that the formation of dynamic alternating forces is significantly reduced.
  • the result is a reduced wear of the gaskets of the fuel injector and a significantly reduced noise.
  • the slowly changing pressure build-up and dismantling is maintained, since at high load conditions, the force generated by the pressure still supports the holding down of the fuel injection valves by means of holding down against the combustion pressure of the combustion chamber.
  • the attachment of the pressure waveguide to the fuel rail can be done in particular by means of a snap, snap or clip connection.
  • the pressure waveguide projects through the receiving opening of the connecting piece and a significantly smaller diameter flow opening provided upstream of the receiving opening at least partially, in particular completely. This also applies to the discharge opening in the fuel distribution line.
  • annular leakage gap In the region of the outflow opening of the fuel distributor line or the flow opening of the connecting piece, an annular leakage gap is formed. Further advantageous embodiments of the leakage gap can be configured by contouring the surface of the pressure waveguide. The leakage gap between the pressure waveguide and the wall surrounding it allows a slow pressure buildup and dismantling in the connecting piece according to the system pressure, ie a static pressure equalization.
  • FIG. 1 a valve in the form of an injection valve 1 for fuel injection systems of mixture-compression spark-ignited internal combustion engines in a side view.
  • the fuel injection valve 1 is part of the fuel injection device.
  • the fuel injection valve 1 which is designed in the form of a direct-injection injector for injecting fuel directly into a combustion chamber of the internal combustion engine, in a receiving bore of a cylinder head, not shown (cylinder head 9 in FIG. 2 ) built-in.
  • a sealing ring 2 in particular of Teflon®, ensures optimum sealing of the fuel injection valve 1 with respect to the wall of the cylinder head.
  • the fuel injection valve 1 has at its inlet end 3 a plug connection to a fuel rail (fuel rail) 4, which by a sealing ring 5 between a connecting piece 6 of the fuel distributor line 4, which is shown in section, and an inlet nozzle 7 of the fuel injection valve 1 is sealed.
  • the fuel injection valve 1 is inserted into a receiving opening 12 of the relatively massive connection piece 6 of the fuel distribution line 4.
  • the connecting piece 6 is, for example, in one piece from the actual fuel distributor line 4 and has upstream of the receiving opening 12 a smaller diameter flow opening 15 through which the flow of the fuel injection valve 1 takes place.
  • the fuel injection valve 1 has an electrical connection plug 8 for the electrical contacting for actuating the fuel injection valve 1.
  • a holding-down device 10 is provided between the fuel injection valve 1 and the connecting piece 6.
  • the hold-down 10 is designed as a bow-shaped component, e.g. as punching-bending part.
  • the hold-down device 10 has a part-ring-shaped base element 11, from which a hold-down bar 13 extends, which abuts against a downstream end face 14 of the connecting piece 6 on the fuel distributor line 4 in the installed state.
  • FIG. 2 shows a partially illustrated fuel injection device in a second known embodiment.
  • This schematic cross section through a high-pressure injection system illustrates that various design variants of the connecting piece 6 are conceivable.
  • a fuel distributor line 4 is provided, which extends at an offset to the valve longitudinal axes of the fuel injection valves 1.
  • the connecting piece 6 forms a connecting piece between the fuel injection valve 1 and the fuel distributor line 4, this connecting piece being fixedly connected to the fuel distributor line 4.
  • the connecting piece 6 has, as in the in FIG. 1 As shown in the example, an opening, which is composed of a flow opening 15 and a receiving opening 12.
  • the connecting piece 6 is otherwise similar cup-shaped ("Raikltasse").
  • FIG. 3 shows a partially illustrated fuel injection device in a third known embodiment.
  • This known solution is similar to the basic structure of the strong in FIG. 1 shown execution.
  • the connection piece 6 does not come out of the fuel distributor line 4 in one piece. Rather, the connecting piece 6 is its own example deep-drawn cup-shaped component which is connected by means of joining (eg brazing) fixed to the fuel rail 4.
  • the wall thickness of the connecting piece 6 is therefore significantly reduced, whereby the extension length of the flow opening 15 is low.
  • the connecting piece 6 is fastened to the fuel distributor line 4 in such a way that the outflow opening 16 of the fuel distributor line 4, the flow opening 15 and the receiving opening 12 of the connecting piece 6 are aligned with one another.
  • the fuel injection valves 1 are connected via a plug connection with the connecting piece 6 of the fuel distributor line 4.
  • the connector is realized within a run as a rail cup connection piece 6, in which the fuel injection valve 1 is inserted.
  • the sealing to the outside is carried out with an attached to the inlet nozzle 7 of the fuel injection valve 1 elastomeric sealing ring 5.
  • proportional hydraulic forces are built up against the fuel injection valve 1 and the fuel manifold 4 via the voltage applied in the connecting piece 6 fuel pressure of the cross-sectional area. In today's typical designs, this is about 10 N / bar.
  • the high-frequency component of 1 to 5 kHz is transmitted via the fuel injection valves 1 and the fuel distributor line 4 as structure-borne noise to the entire engine structure (inter alia cylinder head 9) and leads there to an unwanted sound radiation, which can lead to audible ticker noises.
  • the highly dynamic pressure changes are largely kept away from the connecting piece 6 by being passed through the connecting piece 6 directly into the fuel distributor line 4, without triggering dynamic pressure fluctuations in the volume of the connecting piece 6.
  • This is done with a pressure waveguide 20, which is tubular.
  • the pressure waveguide 20 ensures that the formation of dynamic alternating forces is significantly reduced. The result is a reduced wear of the sealing rings 2, 5 and a significantly reduced noise.
  • the slowly variable pressure build-up and dismantling is maintained, since at high load conditions, the force generated by the pressure still supports the holding down of the fuel injection valves 1 by means of hold-down 10 against the combustion pressure of the combustion chamber.
  • the invention can also be implemented on a suction tube injection system.
  • FIG. 4 shows a partial view of the fuel injection device in the region of the connection of the connecting piece 6 and the fuel injection valve 1 with the pressure wave guide 20 according to the invention in a schematic diagram, wherein the partial view of the embodiment according to FIG. 3 emanates.
  • the pressure wave guide 20 is designed as a thin tube with a continuous longitudinal opening and with the Fuel injection valve 1 is firmly connected at its inlet end. Starting from the fuel injection valve 1, the pressure waveguide 20 protrudes in the upstream direction through the receiving opening 12, the flow opening 15 and the discharge opening 16 and slightly into the interior of the fuel distributor line 4.
  • the pressure waveguide 20 thus connects the fuel injection valve 1 to the fuel distributor line 4 caused by the opening and closing of the fuel injection valve 1 pressure waves in the fuel passing through the pressure waveguide 20 on the volume of the receiving opening 12 of the connecting piece 6 over, without there pressure fluctuations and thus to generate alternating forces.
  • a complete penetration of the discharge opening 16 through the pressure waveguide 20 is not a mandatory requirement.
  • annular leakage gap 21 In the region of the discharge opening 16 of the fuel distributor line 4, which is penetrated by the pressure waveguide 20, an annular leakage gap 21 is formed.
  • the leakage gap 21 between the pressure waveguide 20 and the wall of the discharge opening 16 allows a slow Druckauf- and -development in the connecting piece 6 according to the system pressure, so a static pressure compensation.
  • This additional, non-tight connection combines the advantages of a real line connection of the fuel injectors 1 to the fuel rail 4 with the simple and inexpensive plug-in solution for connection to the fuel rail 4.
  • FIG. 5 a first embodiment of a pressure waveguide 20 according to the invention is shown schematically.
  • the pressure waveguide 20 for example, made of a media-resistant plastic (polyamide), which is attached to a fuel filter 22 of the fuel injection valve 1 by pressing or clipping or clipping. It is also conceivable to mold the pressure waveguide 20 in one piece with the plastic base body of the fuel filter 22.
  • FIG. 6 a second embodiment of a pressure waveguide 20 according to the invention is shown schematically.
  • the pressure waveguide 20 is made of a metal, for example, wherein the pressure waveguide 20 with a radially outwardly projecting flange 24, for example, to a connection sleeve 23 of the fuel injection valve 1 by gluing, welding, soldering, etc. is attached.
  • a one-piece design is conceivable in which the pressure waveguide 20 emerges directly from a thermoformed or rotated connection sleeve 23.
  • 20 grooves or groove or thread-like recesses may be formed on the outer circumference of the pressure waveguide.
  • FIG. 7 shows a third embodiment of a pressure waveguide 20 according to the invention, in which case the pressure waveguide 20 is fixed to the fuel rail 4 and freely in the fuel injector 1, for example, in the fuel filter 22 hangs.
  • the pressure waveguide 20 is, for example, by a snap, snap, clip connection o.ä. attached to the fuel rail 4.
  • the fixed connection is made such that a leakage gap 21 is maintained.
  • a second leakage gap 21 ' may also be provided, specifically between the pressure waveguide 20 and the fuel filter 22 or another component of the fuel injection valve 1 surrounding the pressure waveguide 20 FIGS.
  • FIG. 8 and 9 show cross sections through the pressure waveguide 20 in the region of the leakage gap 21 ', wherein it can be seen that the outer surface of the pressure waveguide 20 is contoured.
  • the outer surface of the pressure waveguide 20 may, for example, longitudinal ribs 24 ( FIG. 8 ) or longitudinal grooves or grooves 25 (FIG. FIG. 9 ) exhibit.
  • FIGS. 5 to 9 shown pressure waveguide 20 are for a fuel injection device according to FIGS. 1 and 3 suitable. A complete penetration of the discharge opening 16 through the pressure waveguide 20 is not a mandatory requirement in these embodiments.
  • FIG. 10 a fourth embodiment of a pressure waveguide 20 according to the invention is shown, said pressure waveguide 20 for a fuel injection device according to FIG. 2 suitable is.
  • the pressure waveguide 20 is either attached to the fuel filter 22 of the fuel injection valve 1 by pressing or clipping on or integrally mitteilformt on the plastic body of the fuel filter 22.
  • the pressure waveguide 20 can also be connected to the connection sleeve 23 of the fuel injection valve 1 or originate in one piece directly from a deep-drawn or rotated connection sleeve 23.
  • the pressure waveguide 20 protrudes into only a part of the flow opening 15 of the connecting piece 6, but not up to lying at right angles to the discharge opening 16 of the fuel manifold 4. The positive effect of passing the dynamic pressure fluctuations in the volume of Receiving opening 12 of the connecting piece 6 is also achieved here.

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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 geht aus von einer Brennstoffeinspritzvorrichtung nach der Gattung des Hauptanspruchs.The invention relates to a fuel injection device according to the preamble of the main claim.

Aus der DE 10 2004 048 401 A1 ist bereits eine Brennstoffeinspritzvorrichtung bekannt. Die Brennstoffeinspritzvorrichtung umfasst mehrere Brennstoffeinspritzventile, eine Aufnahmebohrung im Zylinderkopf für jedes Brennstoffeinspritzventil und jeweils einen Anschlussstutzen einer Brennstoffverteilerleitung, die der Versorgung der Brennstoffeinspritzventile mit Brennstoff dient. Das Brennstoffeinspritzventil ist in den relativ massiven Anschlussstutzen der Brennstoffverteilerleitung eingeschoben und mittels eines Dichtrings abgedichtet. Der Anschlussstutzen geht einteilig aus der eigentlichen Brennstoffverteilerleitung hervor. Die Brennstoffverteilerleitung ist beispielsweise durch Verschrauben fest mit dem Zylinderkopf verbunden. Zwischen dem Anschlussstutzen der Brennstoffverteilerleitung und dem Brennstoffeinspritzventil ist ein bügelförmiger Niederhalter eingespannt. Der Niederhalter weist ein teilringförmiges Grundelement auf, von dem sich aus abgebogen ein axial nachgiebiger Niederhaltebügel erstreckt, der wenigstens zwei Stege besitzt. Die Brennstoffeinspritzvorrichtung eignet sich besonders für den Einsatz in Brennstoffeinspritzanlagen von gemischverdichtenden fremdgezündeten Brennkraftmaschinen. Im Betrieb werden über den in dem Anschlussstutzen anliegenden Brennstoffdruck der Querschnittsfläche proportionale hydraulische Kräfte gegen das Brennstoffeinspritzventil und die Brennstoffverteilerleitung aufgebaut, die dem Dichtring schaden können und die als Körperschall auf die Motorstruktur übertragen werden können und so zu unerwünschter Schallabstrahlung führen (Figur 1). Aus der JP2002115631 ist ein Brennstoffeinspritzvorrichtung bekannt wobei die dynamische Druckschwankungen im Brennstoff beim Öffnen und Schließen des Brennstoffventils vermieden werden durch eine flexibele Oberfläche der Brennstoffverteilerleitung.From the DE 10 2004 048 401 A1 is already known a fuel injection device. The fuel injection device comprises a plurality of fuel injection valves, a receiving bore in the cylinder head for each fuel injection valve and a respective connection piece of a fuel distributor line, which serves to supply the fuel injection valves with fuel. The fuel injection valve is inserted into the relatively massive connecting piece of the fuel distributor line and sealed by means of a sealing ring. The connecting piece is made in one piece from the actual fuel distributor line. The fuel distribution line is firmly connected to the cylinder head, for example, by screwing. Between the connection piece of the fuel distributor line and the fuel injection valve, a bow-shaped holding-down device is clamped. The hold-down device has a part-ring-shaped basic element, from which an axially compliant hold-down bar extends, which has at least two webs. The fuel injector is particularly suitable for use in fuel injection systems of mixture-compression spark-ignition internal combustion engines. In operation, proportional hydraulic forces are built up against the fuel injection valve and the fuel distributor line via the fuel pressure of the cross-sectional area present in the connecting piece, which can damage the sealing ring and act as a structure-borne noise on the Motor structure can be transmitted and thus lead to unwanted sound radiation ( FIG. 1 ). From the JP2002115631 a fuel injector is known wherein the dynamic pressure fluctuations in the fuel during opening and closing of the fuel valve are avoided by a flexible surface of the fuel rail.

Weitere bekannte Ausführungsformen von Brennstoffeinspritzvorrichtungen mit andersartigen Anschlussstutzen werden anhand der Figuren 2 und 3 näher beschrieben. Auch diese Lösungen können die zuvor genannten negativen Wirkungen aufweisen.Other known embodiments of fuel injectors with different types of connecting pieces are based on the Figures 2 and 3 described in more detail. These solutions may also have the aforementioned negative effects.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Brennstoffeinspritzvorrichtung mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, dass durch einfache Maßnahmen am Brennstoffeinspritzventil und am Anschlussstutzen der Brennstoffverteilerleitung eine verbesserte Abdichtung geschaffen ist sowie eine reduzierte Geräuschentwicklung erreicht wird. Erfindungsgemäß werden die dynamischen Druckänderungen im Brennstoff beim Öffnen und Schließen des Brennstoffeinspritzventils zum großen Teil von dem Anschlussstutzen ferngehalten, indem sie durch den Anschlussstutzen hindurch direkt in die Brennstoffverteilerleitung geleitet werden, ohne dynamische Druckschwankungen in dem Volumen des Anschlussstutzens auszulösen. Dies geschieht mit einem Druckwellenleiter, der dafür sorgt, dass die Entstehung von dynamischen Wechselkräften deutlich reduziert wird. Die Folge sind ein reduzierter Verschleiß der Dichtringe des Brennstoffeinspritzventils und eine deutlich verringerte Geräuschentwicklung. Der langsam veränderliche Druckauf- und abbau bleibt erhalten, da bei hohen Lastzuständen die durch den Druck erzeugte Kraft die Niederhaltung der Brennstoffeinspritzventile mittels Niederhaltern gegenüber dem Verbrennungsdruck des Brennraums noch unterstützt.The fuel injection device according to the invention with the characterizing features of claim 1 has the advantage that an improved seal is created by simple measures on the fuel injector and the connecting piece of the fuel rail and a reduced noise is achieved. According to the invention, the dynamic pressure changes in the fuel during opening and closing of the fuel injection valve are largely kept away from the connection piece by being passed through the connection piece directly into the fuel distribution line without triggering dynamic pressure fluctuations in the volume of the connection piece. This is done with a pressure wave guide, which ensures that the formation of dynamic alternating forces is significantly reduced. The result is a reduced wear of the gaskets of the fuel injector and a significantly reduced noise. The slowly changing pressure build-up and dismantling is maintained, since at high load conditions, the force generated by the pressure still supports the holding down of the fuel injection valves by means of holding down against the combustion pressure of the combustion chamber.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Brennstoffeinspritzvorrichtung möglich.The measures listed in the dependent claims advantageous refinements and improvements of the claim 1 fuel injection device are possible.

Besonders vorteilhaft ist es, bei einer Befestigung des Druckwellenleiters am Brennstoffeinspritzventil diese an einem Brennstofffilter oder an einer Anschlusshülse des Brennstoffeinspritzventils insbesondere durch eine erweiterte Kunststoffumspritzung oder mittels einer Rast-, Schnapp- oder Clipverbindung vorzunehmen.It is particularly advantageous in a fastening of the pressure waveguide to the fuel injection valve on a fuel filter or on a Connection sleeve of the fuel injection valve in particular by an extended plastic injection or by means of a snap, snap or clip connection make.

Die Befestigung des Druckwellenleiters an der Brennstoffverteilerleitung kann insbesondere mittels einer Rast-, Schnapp- oder Clipverbindung erfolgen.The attachment of the pressure waveguide to the fuel rail can be done in particular by means of a snap, snap or clip connection.

In vorteilhafter Weise durchragt der Druckwellenleiter die Aufnahmeöffnung des Anschlussstutzens und eine stromaufwärts der Aufnahmeöffnung vorgesehene deutlich durchmesserkleinere Strömungsöffnung zumindest teilweise, insbesondere vollständig. Dies gilt auch für die Abströmöffnung in der Brennstoffverteilerleitung.Advantageously, the pressure waveguide projects through the receiving opening of the connecting piece and a significantly smaller diameter flow opening provided upstream of the receiving opening at least partially, in particular completely. This also applies to the discharge opening in the fuel distribution line.

Im Bereich der Abströmöffnung der Brennstoffverteilerleitung oder der Strömungsöffnung des Anschlussstutzens ist ein ringförmiger Leckagespalt gebildet. Weitere vorteilhafte Ausführungsformen des Leckagespaltes können durch eine Konturierung der Oberfläche des Druckwellenleiters ausgestaltet sein. Der Leckagespalt zwischen dem Druckwellenleiter und der ihn umgebenden Wandung erlaubt einen langsamen Druckauf- und -abbau in dem Anschlussstutzen entsprechend dem Systemdruck, also einen statischen Druckausgleich.In the region of the outflow opening of the fuel distributor line or the flow opening of the connecting piece, an annular leakage gap is formed. Further advantageous embodiments of the leakage gap can be configured by contouring the surface of the pressure waveguide. The leakage gap between the pressure waveguide and the wall surrounding it allows a slow pressure buildup and dismantling in the connecting piece according to the system pressure, ie a static pressure equalization.

Zeichnungdrawing

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

Figur 1
eine teilweise dargestellte Brennstoffeinspritzvorrichtung in einer ersten bekannten Ausführung,
Figur 2
eine teilweise dargestellte Brennstoffeinspritzvorrichtung in einer zweiten bekannten Ausführung,
Figur 3
eine teilweise dargestellte Brennstoffeinspritzvorrichtung in einer dritten bekannten Ausführung,
Figur 4
eine Teilansicht der Brennstoffeinspritzvorrichtung im Bereich der Verbindung von Anschlussstutzen und Brennstoffeinspritzventil mit einem erfindungsgemäßen Druckwellenleiter in einer Prinzipdarstellung,
Figur 5
eine erste Ausführung eines erfindungsgemäßen Druckwellenleiters,
Figur 6
eine zweite Ausführung eines erfindungsgemäßen Druckwellenleiters,
Figur 7
eine dritte Ausführung eines erfindungsgemäßen Druckwellenleiters, wobei die in den Figuren 5 bis 7 gezeigten Druckwellenleiter für eine Brennstoffeinspritzvorrichtung gemäß Figuren 1 und 3 geeignet sind,
Figur 8
einen Querschnitt durch einen Druckwellenleiter im Bereich eines Leckagespaltes,
Figur 9
einen weiteren Querschnitt durch einen Druckwellenleiter im Bereich eines Leckagespaltes und
Figur 10
eine vierte Ausführung eines erfindungsgemäßen Druckwellenleiters, wobei dieser Druckwellenleiter für eine Brennstoffeinspritzvorrichtung gemäß Figur 2 geeignet ist.
Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it
FIG. 1
a partially illustrated fuel injector in a first known embodiment,
FIG. 2
a partially illustrated fuel injection device in a second known embodiment,
FIG. 3
a partially illustrated fuel injection device in a third known embodiment,
FIG. 4
a partial view of the fuel injection device in the region of the connection of connecting piece and fuel injection valve with a pressure waveguide according to the invention in a schematic representation,
FIG. 5
A first embodiment of a pressure waveguide according to the invention,
FIG. 6
A second embodiment of a pressure waveguide according to the invention,
FIG. 7
a third embodiment of a pressure wave guide according to the invention, wherein in the FIGS. 5 to 7 shown pressure waveguide for a fuel injection device according to FIGS. 1 and 3 are suitable,
FIG. 8
a cross section through a pressure wave guide in the region of a leakage gap,
FIG. 9
a further cross section through a pressure wave guide in the region of a leakage gap and
FIG. 10
a fourth embodiment of a pressure waveguide according to the invention, said pressure waveguide for a fuel injection device according to FIG. 2 suitable is.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Zum Verständnis der Erfindung werden im Folgenden anhand der Figuren 1 bis 3 drei bekannte Ausführungsformen von Brennstoffeinspritzvorrichtungen mit unterschiedlichen Anschlussstutzen 6 einer Brennstoffverteilerleitung 4 zur Aufnahme und Brennstoffversorgung eines Brennstoffeinspritzventils 1 näher beschrieben. In der Figur 1 ist als ein Ausführungsbeispiel ein Ventil in der Form eines Einspritzventils 1 für Brennstoffeinspritzanlagen von gemischverdichtenden fremdgezündeten Brennkraftmaschinen in einer Seitenansicht dargestellt. Das Brennstoffeinspritzventil 1 ist Teil der Brennstoffeinspritzvorrichtung. Mit einem stromabwärtigen Ende ist das Brennstoffeinspritzventil 1, das in Form eines direkt einspritzenden Einspritzventils zum direkten Einspritzen von Brennstoff in einen Brennraum der Brennkraftmaschine ausgeführt ist, in eine Aufnahmebohrung eines nicht dargestellten Zylinderkopfes (Zylinderkopf 9 in Figur 2) eingebaut. Ein Dichtring 2, insbesondere aus Teflon ®, sorgt für eine optimale Abdichtung des Brennstoffeinspritzventils 1 gegenüber der Wandung des Zylinderkopfes.For the understanding of the invention are described below with reference to the FIGS. 1 to 3 three known embodiments of fuel injectors with different connecting pieces 6 a fuel distributor line 4 for receiving and fuel supply of a fuel injection valve 1 described in more detail. In the FIG. 1 is shown as an embodiment, a valve in the form of an injection valve 1 for fuel injection systems of mixture-compression spark-ignited internal combustion engines in a side view. The fuel injection valve 1 is part of the fuel injection device. With a downstream end, the fuel injection valve 1, which is designed in the form of a direct-injection injector for injecting fuel directly into a combustion chamber of the internal combustion engine, in a receiving bore of a cylinder head, not shown (cylinder head 9 in FIG FIG. 2 ) built-in. A sealing ring 2, in particular of Teflon®, ensures optimum sealing of the fuel injection valve 1 with respect to the wall of the cylinder head.

Das Brennstoffeinspritzventil 1 weist an seinem zulaufseitigen Ende 3 eine Steckverbindung zu einer Brennstoffverteilerleitung (Fuel Rail) 4 auf, die durch einen Dichtring 5 zwischen einem Anschlussstutzen 6 der Brennstoffverteilerleitung 4, der im Schnitt dargestellt ist, und einem Zulaufstutzen 7 des Brennstoffeinspritzventils 1 abgedichtet ist. Das Brennstoffeinspritzventil 1 ist in eine Aufnahmeöffnung 12 des relativ massiven Anschlussstutzens 6 der Brennstoffverteilerleitung 4 eingeschoben. Der Anschlussstutzen 6 geht dabei z.B. einteilig aus der eigentlichen Brennstoffverteilerleitung 4 hervor und besitzt stromaufwärts der Aufnahmeöffnung 12 eine durchmesserkleinere Strömungsöffnung 15, über die die Anströmung des Brennstoffeinspritzventils 1 erfolgt. Das Brennstoffeinspritzventil 1 verfügt über einen elektrischen Anschlussstecker 8 für die elektrische Kontaktierung zur Betätigung des Brennstoffeinspritzventils 1.The fuel injection valve 1 has at its inlet end 3 a plug connection to a fuel rail (fuel rail) 4, which by a sealing ring 5 between a connecting piece 6 of the fuel distributor line 4, which is shown in section, and an inlet nozzle 7 of the fuel injection valve 1 is sealed. The fuel injection valve 1 is inserted into a receiving opening 12 of the relatively massive connection piece 6 of the fuel distribution line 4. The connecting piece 6 is, for example, in one piece from the actual fuel distributor line 4 and has upstream of the receiving opening 12 a smaller diameter flow opening 15 through which the flow of the fuel injection valve 1 takes place. The fuel injection valve 1 has an electrical connection plug 8 for the electrical contacting for actuating the fuel injection valve 1.

Um das Brennstoffeinspritzventil 1 und die Brennstoffverteilerleitung 4 weitgehend radialkraftfrei voneinander zu beabstanden und das Brennstoffeinspritzventil 1 sicher in der Aufnahmebohrung des Zylinderkopfes niederzuhalten, ist ein Niederhalter 10 zwischen dem Brennstoffeinspritzventil 1 und dem Anschlussstutzen 6 vorgesehen. Der Niederhalter 10 ist als bügelförmiges Bauteil ausgeführt, z.B. als Stanz-Biege-Teil. Der Niederhalter 10 weist ein teilringförmiges Grundelement 11 auf, von dem aus abgebogen ein Niederhaltebügel 13 verläuft, der an einer stromabwärtigen Endfläche 14 des Anschlussstutzens 6 an der Brennstoffverteilerleitung 4 im eingebauten Zustand anliegt.In order to space the fuel injection valve 1 and the fuel distributor line 4 substantially free of radial force from one another and to hold down the fuel injection valve 1 securely in the receiving bore of the cylinder head, a holding-down device 10 is provided between the fuel injection valve 1 and the connecting piece 6. The hold-down 10 is designed as a bow-shaped component, e.g. as punching-bending part. The hold-down device 10 has a part-ring-shaped base element 11, from which a hold-down bar 13 extends, which abuts against a downstream end face 14 of the connecting piece 6 on the fuel distributor line 4 in the installed state.

Figur 2 zeigt eine teilweise dargestellte Brennstoffeinspritzvorrichtung in einer zweiten bekannten Ausführung. Dieser schematische Querschnitt durch ein Hochdruck-Einspritzsystem gemäß dem Stand der Technik verdeutlicht, dass verschiedene Gestaltungsvarianten des Anschlussstutzens 6 denkbar sind. Zur Versorgung der Brennstoffeinspritzventile 1 ist eine Brennstoffverteilerleitung 4 vorgesehen, die mit Versatz zu den Ventillängsachsen der Brennstoffeinspritzventile 1 verläuft. Der Anschlussstutzen 6 bildet ein Verbindungsstück zwischen dem Brennstoffeinspritzventil 1 und der Brennstoffverteilerleitung 4, wobei dieses Verbindungsstück fest mit der Brennstoffverteilerleitung 4 verbunden ist. Der Anschlussstutzen 6 weist dabei wie in dem in Figur 1 gezeigten Beispiel eine Öffnung auf, die sich aus einer Strömungsöffnung 15 und einer Aufnahmeöffnung 12 zusammensetzt. Im Gegensatz zum Anschlussstutzen 6 gemäß Figur 1 ist die Strömungsöffnung 15 winklig, z.B. rechtwinklig ausgeführt, so dass die Abströmöffnung 16 der Brennstoffverteilerleitung 4 und die Aufnahmeöffnung 12 des Anschlussstutzens 6 nicht fluchtend zueinander liegen. Der Anschlussstutzen 6 ist ansonsten ähnlich tassenförmig ausgeführt ("Raikltasse"). FIG. 2 shows a partially illustrated fuel injection device in a second known embodiment. This schematic cross section through a high-pressure injection system according to the prior art illustrates that various design variants of the connecting piece 6 are conceivable. To supply the fuel injection valves 1, a fuel distributor line 4 is provided, which extends at an offset to the valve longitudinal axes of the fuel injection valves 1. The connecting piece 6 forms a connecting piece between the fuel injection valve 1 and the fuel distributor line 4, this connecting piece being fixedly connected to the fuel distributor line 4. The connecting piece 6 has, as in the in FIG. 1 As shown in the example, an opening, which is composed of a flow opening 15 and a receiving opening 12. In contrast to the connection piece 6 according to FIG. 1 is the Flow opening 15 at an angle, for example, executed at right angles, so that the discharge opening 16 of the fuel rail 4 and the receiving opening 12 of the connecting piece 6 are not in alignment with each other. The connecting piece 6 is otherwise similar cup-shaped ("Raikltasse").

Figur 3 zeigt eine teilweise dargestellte Brennstoffeinspritzvorrichtung in einer dritten bekannten Ausführung. Diese bekannte Lösung ähnelt vom grundsätzlichen Aufbau her stark der in Figur 1 gezeigten Ausführung. Im Unterschied zur Figur 1 geht hier jedoch der Anschlussstutzen 6 nicht einteilig aus der Brennstoffverteilerleitung 4 hervor. Vielmehr stellt der Anschlussstutzen 6 ein eigenes z.B. tiefgezogenes becherförmiges Bauteil dar, das mittels Fügen (z.B. Hartlöten) fest mit der Brennstoffverteilerleitung 4 verbunden ist. Die Wandungsstärke des Anschlussstutzens 6 ist deshalb deutlich herabgesetzt, wodurch auch die Erstreckungslänge der Strömungsöffnung 15 gering ist. Der Anschlussstutzen 6 ist dabei so an der Brennstoffverteilerleitung 4 befestigt, dass die Abströmöffnung 16 der Brennstoffverteilerleitung 4, die Strömungsöffnung 15 und die Aufnahmeöffnung 12 des Anschlussstutzens 6 miteinander fluchten. FIG. 3 shows a partially illustrated fuel injection device in a third known embodiment. This known solution is similar to the basic structure of the strong in FIG. 1 shown execution. In contrast to FIG. 1 However, here the connection piece 6 does not come out of the fuel distributor line 4 in one piece. Rather, the connecting piece 6 is its own example deep-drawn cup-shaped component which is connected by means of joining (eg brazing) fixed to the fuel rail 4. The wall thickness of the connecting piece 6 is therefore significantly reduced, whereby the extension length of the flow opening 15 is low. The connecting piece 6 is fastened to the fuel distributor line 4 in such a way that the outflow opening 16 of the fuel distributor line 4, the flow opening 15 and the receiving opening 12 of the connecting piece 6 are aligned with one another.

Zusammenfassend kann also Folgendes festgehalten werden. Bei fast allen bekannten Systemen der Benzin-Direkteinspritzung werden die Brennstoffeinspritzventile 1 über eine Steckverbindung mit dem Anschlussstutzen 6 der Brennstoffverteilerleitung 4 verbunden. Die Steckverbindung ist dabei innerhalb eines als Railtasse ausgeführten Anschlussstutzens 6 realisiert, in den das Brennstoffeinspritzventil 1 eingeschoben wird. Die Abdichtung nach außen erfolgt mit einem am Zulaufstutzen 7 des Brennstoffeinspritzventils 1 angebrachten Elastomer-Dichtring 5. Im Betrieb werden über den in dem Anschlussstutzen 6 anliegenden Brennstoffdruck der Querschnittsfläche proportionale hydraulische Kräfte gegen das Brennstoffeinspritzventil 1 und die Brennstoffverteilerleitung 4 aufgebaut. Bei heutigen typischen Auslegungen sind dies ca. 10 N/bar. Der Druck ändert sich zum einen langsam durch den Auf- und Abbau des Systemdrucks abhängig von den Fahrzuständen, wobei dies typischerweise zwischen 50 bar im Leerlauf und 200 bar bei Volllast geschieht. Zum anderen erfolgt eine hochdynamische Änderung des Drucks bei jeder Einspritzung durch die dabei ausgelösten Druckwellen im Brennstoffeinspritzventil 1 (typisch 10 bis 40 bar peakpeak-Amplitude).In summary, therefore, the following can be stated. In almost all known systems of gasoline direct injection, the fuel injection valves 1 are connected via a plug connection with the connecting piece 6 of the fuel distributor line 4. The connector is realized within a run as a rail cup connection piece 6, in which the fuel injection valve 1 is inserted. The sealing to the outside is carried out with an attached to the inlet nozzle 7 of the fuel injection valve 1 elastomeric sealing ring 5. In operation, proportional hydraulic forces are built up against the fuel injection valve 1 and the fuel manifold 4 via the voltage applied in the connecting piece 6 fuel pressure of the cross-sectional area. In today's typical designs, this is about 10 N / bar. The pressure changes slowly on the one hand by the construction and dismantling of the system pressure depending on the driving conditions, which typically happens between 50 bar at idle and 200 bar at full load. On the other hand, there is a highly dynamic change in the pressure at each injection by the case triggered pressure waves in the fuel injector 1 (typically 10 to 40 bar peak peak amplitude).

Die hochdynamischen Druckänderungen, die im Betrieb der Brennstoffeinspritzventile 1 ausgelöst werden, erzeugen starke Wechselkräfte auf die Brennstoffverteilerleitung 4 und die Brennstoffeinspritzventile 1. Der tieffrequente Anteil < 1 kHz kann der Dichtfunktion des Dichtrings 5 im Anschlussstutzen 6 sowie der Abdichtung der Brennstoffeinspritzventile 1 gegenüber dem Brennraum mit dem Dichtring 2 durch die erzwungenen Relativbewegungen spürbar schaden. Der hochfrequente Anteil von 1 bis 5 kHz wiederum wird über die Brennstoffeinspritzventile 1 und die Brennstoffverteilerleitung 4 als Körperschall auf die gesamte Motorstruktur (u.a. Zylinderkopf 9) übertragen und führt dort zu einer unerwünschten Schallabstrahlung, die zu hörbaren Tickergeräuschen führen kann.The highly dynamic pressure changes that are triggered in the operation of the fuel injection valves 1, generate strong alternating forces on the fuel rail 4 and the fuel injectors 1. The low-frequency component <1 kHz, the sealing function of the sealing ring 5 in the connection piece 6 and the sealing of the fuel injection valves 1 with respect to the combustion chamber with the sealing ring 2 by the forced relative movements noticeably damage. The high-frequency component of 1 to 5 kHz, in turn, is transmitted via the fuel injection valves 1 and the fuel distributor line 4 as structure-borne noise to the entire engine structure (inter alia cylinder head 9) and leads there to an unwanted sound radiation, which can lead to audible ticker noises.

Erfindungsgemäß werden die hochdynamischen Druckänderungen zum großen Teil von dem Anschlussstutzen 6 ferngehalten, indem sie durch den Anschlussstutzen 6 hindurch direkt in die Brennstoffverteilerleitung 4 geleitet werden, ohne dynamische Druckschwankungen in dem Volumen des Anschlussstutzens 6 auszulösen. Dies geschieht mit einem Druckwellenleiter 20, der röhrenförmig ausgebildet ist. Der Druckwellenleiter 20 sorgt dafür, dass die Entstehung von dynamischen Wechselkräften deutlich reduziert wird. Die Folge sind ein reduzierter Verschleiß der Dichtringe 2, 5 und eine deutlich verringerte Geräuschentwicklung. Der langsam veränderliche Druckauf- und abbau bleibt erhalten, da bei hohen Lastzuständen die durch den Druck erzeugte Kraft die Niederhaltung der Brennstoffeinspritzventile 1 mittels Niederhalter 10 gegenüber dem Verbrennungsdruck des Brennraums noch unterstützt. Prinzipiell ist die Erfindung auch an einem Saugrohreinspritzsystem realisierbar.According to the invention, the highly dynamic pressure changes are largely kept away from the connecting piece 6 by being passed through the connecting piece 6 directly into the fuel distributor line 4, without triggering dynamic pressure fluctuations in the volume of the connecting piece 6. This is done with a pressure waveguide 20, which is tubular. The pressure waveguide 20 ensures that the formation of dynamic alternating forces is significantly reduced. The result is a reduced wear of the sealing rings 2, 5 and a significantly reduced noise. The slowly variable pressure build-up and dismantling is maintained, since at high load conditions, the force generated by the pressure still supports the holding down of the fuel injection valves 1 by means of hold-down 10 against the combustion pressure of the combustion chamber. In principle, the invention can also be implemented on a suction tube injection system.

Figur 4 zeigt eine Teilansicht der Brennstoffeinspritzvorrichtung im Bereich der Verbindung von Anschlussstutzen 6 und Brennstoffeinspritzventil 1 mit dem erfindungsgemäßen Druckwellenleiter 20 in einer Prinzipdarstellung, wobei die Teilansicht von der Ausführung gemäß Figur 3 ausgeht. Der Druckwellenleiter 20 ist als dünnes Rohr mit einer durchgehenden Längsöffnung ausgeführt und mit dem Brennstoffeinspritzventil 1 an dessen zulaufseitigem Ende fest verbunden. Vom Brennstoffeinspritzventil 1 ausgehend ragt der Druckwellenleiter 20 in stromaufwärtiger Richtung durch die Aufnahmeöffnung 12, die Strömungsöffnung 15 und die Abströmöffnung 16 hindurch und geringfügig hinein in das Innere der Brennstoffverteilerleitung 4. Der Druckwellenleiter 20 verbindet auf diese Weise das Brennstoffeinspritzventil 1 mit der Brennstoffverteilerleitung 4. Die durch das Öffnen und Schließen des Brennstoffeinspritzventils 1 verursachten Druckwellen im Brennstoff laufen durch den Druckwellenleiter 20 am Volumen der Aufnahmeöffnung 12 des Anschlussstutzens 6 vorbei, ohne dort Druckschwankungen und damit Wechselkräfte zu erzeugen. Ein vollständiges Durchdringen der Abströmöffnung 16 durch den Druckwellenleiter 20 ist kein zwingendes Erfordernis. FIG. 4 shows a partial view of the fuel injection device in the region of the connection of the connecting piece 6 and the fuel injection valve 1 with the pressure wave guide 20 according to the invention in a schematic diagram, wherein the partial view of the embodiment according to FIG. 3 emanates. The pressure wave guide 20 is designed as a thin tube with a continuous longitudinal opening and with the Fuel injection valve 1 is firmly connected at its inlet end. Starting from the fuel injection valve 1, the pressure waveguide 20 protrudes in the upstream direction through the receiving opening 12, the flow opening 15 and the discharge opening 16 and slightly into the interior of the fuel distributor line 4. The pressure waveguide 20 thus connects the fuel injection valve 1 to the fuel distributor line 4 caused by the opening and closing of the fuel injection valve 1 pressure waves in the fuel passing through the pressure waveguide 20 on the volume of the receiving opening 12 of the connecting piece 6 over, without there pressure fluctuations and thus to generate alternating forces. A complete penetration of the discharge opening 16 through the pressure waveguide 20 is not a mandatory requirement.

Im Bereich der Abströmöffnung 16 der Brennstoffverteilerleitung 4, die vom Druckwellenleiter 20 durchragt wird, ist ein ringförmiger Leckagespalt 21 gebildet. Der Leckagespalt 21 zwischen dem Druckwellenleiter 20 und der Wandung der Abströmöffnung 16 erlaubt einen langsamen Druckauf- und -abbau in dem Anschlussstutzen 6 entsprechend dem Systemdruck, also einen statischen Druckausgleich. Diese zusätzliche, nicht dichte Anbindung kombiniert die Vorteile einer echten Leitungsanbindung der Brennstoffeinspritzventile 1 an die Brennstoffverteilerleitung 4 mit der einfachen und kostengünstigen Stecklösung zur Anbindung an die Brennstoffverteilerleitung 4.In the region of the discharge opening 16 of the fuel distributor line 4, which is penetrated by the pressure waveguide 20, an annular leakage gap 21 is formed. The leakage gap 21 between the pressure waveguide 20 and the wall of the discharge opening 16 allows a slow Druckauf- and -development in the connecting piece 6 according to the system pressure, so a static pressure compensation. This additional, non-tight connection combines the advantages of a real line connection of the fuel injectors 1 to the fuel rail 4 with the simple and inexpensive plug-in solution for connection to the fuel rail 4.

Zur Herstellung der Leitungsanbindung zwischen dem Brennstoffeinspritzventil 1 und dem Volumen der Brennstoffverteilerleitung 4 mittels des Druckwellenleiters 20 sind verschiedene erfindungsgemäße Lösungen denkbar. In Figur 5 ist eine erste Ausführung eines erfindungsgemäßen Druckwellenleiters 20 schematisch dargestellt. Bei diesem Ausführungsbeispiel ist der Druckwellenleiter 20 z.B. aus einem medienbeständigen Kunststoff (Polyamid) gefertigt, der an einem Brennstofffilter 22 des Brennstoffeinspritzventils 1 durch Einpressen oder Ein- bzw. Aufclipsen befestigt ist. Denkbar ist auch, den Druckwellenleiter 20 einteilig am Kunststoffgrundkörper des Brennstofffilters 22 mit anzuformen.Various solutions according to the invention are conceivable for producing the line connection between the fuel injection valve 1 and the volume of the fuel distributor line 4 by means of the pressure waveguide 20. In FIG. 5 a first embodiment of a pressure waveguide 20 according to the invention is shown schematically. In this embodiment, the pressure waveguide 20, for example, made of a media-resistant plastic (polyamide), which is attached to a fuel filter 22 of the fuel injection valve 1 by pressing or clipping or clipping. It is also conceivable to mold the pressure waveguide 20 in one piece with the plastic base body of the fuel filter 22.

In Figur 6 ist eine zweite Ausführung eines erfindungsgemäßen Druckwellenleiters 20 schematisch dargestellt. Bei diesem Ausführungsbeispiel ist der Druckwellenleiter 20 z.B. aus einem Metall gefertigt, wobei der Druckwellenleiter 20 mit einem radial nach außen stehenden Flansch 24 z.B. an einer Anschlusshülse 23 des Brennstoffeinspritzventils 1 durch Kleben, Schweißen, Löten u.a. befestigt ist. Auch hier ist eine einteilige Ausführung denkbar, bei der der Druckwellenleiter 20 unmittelbar aus einer tiefgezogenen oder gedrehten Anschlusshülse 23 hervorgeht. Bei den in den Figuren 5 und 6 gezeigten Ausführungsbeispielen liegt keine feste Verbindung des Druckwellenleiters 20 mit der Brennstoffverteilerleitung 4 vor. Vielmehr handelt es sich um eine Spielpassung zur Bildung des Leckagespaltes 21. Wird jedoch eine Presspassung realisiert, so können am äußeren Umfang des Druckwellenleiters 20 riefen- oder rillen- oder gewindeartige Vertiefungen eingeformt sein.In FIG. 6 a second embodiment of a pressure waveguide 20 according to the invention is shown schematically. In this embodiment, the pressure waveguide 20 is made of a metal, for example, wherein the pressure waveguide 20 with a radially outwardly projecting flange 24, for example, to a connection sleeve 23 of the fuel injection valve 1 by gluing, welding, soldering, etc. is attached. Again, a one-piece design is conceivable in which the pressure waveguide 20 emerges directly from a thermoformed or rotated connection sleeve 23. In the in the FIGS. 5 and 6 In the embodiments shown, there is no fixed connection of the pressure waveguide 20 to the fuel distributor line 4. Rather, it is a clearance fit to form the leakage gap 21. However, if a press fit is realized, 20 grooves or groove or thread-like recesses may be formed on the outer circumference of the pressure waveguide.

Figur 7 zeigt eine dritte Ausführung eines erfindungsgemäßen Druckwellenleiters 20, wobei hier der Druckwellenleiter 20 an der Brennstoffverteilerleitung 4 befestigt ist und frei in das Brennstoffeinspritzventil 1, z.B. in den Brennstofffilter 22 hineinhängt. Der Druckwellenleiter 20 ist dabei beispielsweise durch eine Rast-, Schnapp-, Clipverbindung o.ä. an der Brennstoffverteilerleitung 4 angebracht. Die feste Verbindung ist derart vorgenommen, dass ein Leckagespalt 21 erhalten bleibt. Alternativ oder unterstützend kann auch ein zweiter Leckagespalt 21' vorgesehen sein, und zwar zwischen dem Druckwellenleiter 20 und dem Brennstofffilter 22 oder einem anderen den Druckwellenleiter 20 umgebenden Bauteil des Brennstoffeinspritzventils 1. Die Figuren 8 und 9 zeigen Querschnitte durch den Druckwellenleiter 20 im Bereich des Leckagespaltes 21', wobei erkennbar ist, dass die äußere Oberfläche des Druckwellenleiters 20 konturiert ist. Die Außenfläche des Druckwellenleiters 20 kann z.B. Längsrippen 24 (Figur 8) oder Längsrillen oder -nuten 25 (Figur 9) aufweisen. FIG. 7 shows a third embodiment of a pressure waveguide 20 according to the invention, in which case the pressure waveguide 20 is fixed to the fuel rail 4 and freely in the fuel injector 1, for example, in the fuel filter 22 hangs. The pressure waveguide 20 is, for example, by a snap, snap, clip connection o.ä. attached to the fuel rail 4. The fixed connection is made such that a leakage gap 21 is maintained. Alternatively or supportively, a second leakage gap 21 'may also be provided, specifically between the pressure waveguide 20 and the fuel filter 22 or another component of the fuel injection valve 1 surrounding the pressure waveguide 20 FIGS. 8 and 9 show cross sections through the pressure waveguide 20 in the region of the leakage gap 21 ', wherein it can be seen that the outer surface of the pressure waveguide 20 is contoured. The outer surface of the pressure waveguide 20 may, for example, longitudinal ribs 24 ( FIG. 8 ) or longitudinal grooves or grooves 25 (FIG. FIG. 9 ) exhibit.

Die in den Figuren 5 bis 9 gezeigten Druckwellenleiter 20 sind für eine Brennstoffeinspritzvorrichtung gemäß Figuren 1 und 3 geeignet. Ein vollständiges Durchdringen der Abströmöffnung 16 durch den Druckwellenleiter 20 ist bei diesen Ausführungsbeispielen kein zwingendes Erfordernis.The in the FIGS. 5 to 9 shown pressure waveguide 20 are for a fuel injection device according to FIGS. 1 and 3 suitable. A complete penetration of the discharge opening 16 through the pressure waveguide 20 is not a mandatory requirement in these embodiments.

In der Figur 10 ist eine vierte Ausführung eines erfindungsgemäßen Druckwellenleiters 20 dargestellt, wobei dieser Druckwellenleiter 20 für eine Brennstoffeinspritzvorrichtung gemäß Figur 2 geeignet ist. Der Druckwellenleiter 20 ist entweder an dem Brennstofffilter 22 des Brennstoffeinspritzventils 1 durch Einpressen oder Ein- bzw. Aufclipsen befestigt oder einteilig am Kunststoffgrundkörper des Brennstofffilters 22 mitangeformt. Alternativ kann der Druckwellenleiter 20 auch mit der Anschlusshülse 23 des Brennstoffeinspritzventils 1 verbunden sein oder einteilig unmittelbar aus einer tiefgezogenen oder gedrehten Anschlusshülse 23 hervorgehen. Im Gegensatz zu den vorher beschriebenen Ausführungsbeispielen ragt der Druckwellenleiter 20 nur in einen Teil der Strömungsöffnung 15 des Anschlussstutzens 6 hinein, nicht aber bis zu der dazu im rechten Winkel liegenden Abströmöffnung 16 der Brennstoffverteilerleitung 4. Der positive Effekt des Vorbeileitens der dynamischen Druckschwankungen am Volumen der Aufnahmeöffnung 12 des Anschlussstutzens 6 wird aber auch hierbei erzielt.In the FIG. 10 a fourth embodiment of a pressure waveguide 20 according to the invention is shown, said pressure waveguide 20 for a fuel injection device according to FIG. 2 suitable is. The pressure waveguide 20 is either attached to the fuel filter 22 of the fuel injection valve 1 by pressing or clipping on or integrally mitteilformt on the plastic body of the fuel filter 22. Alternatively, the pressure waveguide 20 can also be connected to the connection sleeve 23 of the fuel injection valve 1 or originate in one piece directly from a deep-drawn or rotated connection sleeve 23. In contrast to the previously described embodiments, the pressure waveguide 20 protrudes into only a part of the flow opening 15 of the connecting piece 6, but not up to lying at right angles to the discharge opening 16 of the fuel manifold 4. The positive effect of passing the dynamic pressure fluctuations in the volume of Receiving opening 12 of the connecting piece 6 is also achieved here.

Claims (10)

  1. Fuel injection device for fuel injection systems of internal combustion engines, in particular for directly injecting fuel into a combustion chamber, having at least one fuel injection valve (1), having a fuel distributor line (4) with at least one connector piece (6), wherein the fuel injection valve (1) is inserted into a receiving opening (12) of the connector piece (6) and the fuel distributor line (4) has an outflow opening (16) for the discharging of fuel to the fuel injection valve (1),
    characterized
    in that a pressure wave conductor (20) is provided between the fuel injection valve (1) and the fuel distributor line (4) such that dynamic pressure fluctuations in the fuel injection valve (1) can substantially be conducted past the volume of the receiving opening (12) of the connector piece (6), wherein the pressure wave conductor (20) is fastened either to the fuel injection valve (1) or to the fuel distributor line (4), and wherein the pressure wave conductor (20) at least partially extends through the outflow opening (16) of the fuel distributor line (4).
  2. Fuel injection device according to Claim 1,
    characterized
    in that the pressure wave conductor (20) is of tubular form with a continuous longitudinal opening in the interior.
  3. Fuel injection device according to Claim 1 or 2,
    characterized
    in that the pressure wave conductor (20) is manufactured from metal or plastic.
  4. Fuel injection device according to Claim 1,
    characterized
    in that the pressure wave conductor (20) is fastened to a fuel filter (22) or to a connector sleeve (23) of the fuel injection valve (1) or extends in unipartite form from the fuel filter (22) or from the connector sleeve (23) of the fuel injection valve (1).
  5. Fuel injection device according to Claim 4,
    characterized
    in that the pressure wave conductor (20) can be fastened to the fuel filter (22) by being pressed in or by being clipped in or clipped on.
  6. Fuel injection device according to Claim 1,
    characterized
    in that the pressure wave conductor (20) can be fastened to the fuel distributor line (4) by way of a detent, snap-action or clip-type connection.
  7. Fuel injection device according to one of the preceding claims,
    characterized
    in that the connector piece (6) of the fuel distributor line (4) has, upstream of the receiving opening (12), a flow opening (15) which is of considerably smaller diameter than the receiving opening (12) and which is at least partially extended through by the pressure wave conductor (20).
  8. Fuel injection device according to Claim 1,
    characterized
    in that the pressure wave conductor (20) at least partially extends through the outflow opening (16) of the fuel distributor line (4) with a clearance fit, whereby a leakage gap (21) is formed.
  9. Fuel injection device according to Claim 7,
    characterized
    in that the pressure wave conductor (20) at least partially extends through the flow opening (15) of the connector piece (6) of the fuel distributor line (4) with a clearance fit, whereby a leakage gap (21) is formed.
  10. Fuel injection device according to Claim 1,
    characterized
    in that a leakage gap (21, 21') between the pressure wave conductor (20) and the wall surrounding it is formed by groove-like or channel-like or thread-like depressions (24, 25) formed on the outer circumference of the pressure wave conductor (20).
EP07857303.7A 2007-10-15 2007-12-07 Fuel injection device Active EP2203639B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007049357A DE102007049357A1 (en) 2007-10-15 2007-10-15 Fuel injection device
PCT/EP2007/063559 WO2009049687A1 (en) 2007-10-15 2007-12-07 Fuel injection device

Publications (2)

Publication Number Publication Date
EP2203639A1 EP2203639A1 (en) 2010-07-07
EP2203639B1 true EP2203639B1 (en) 2015-07-08

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Application Number Title Priority Date Filing Date
EP07857303.7A Active EP2203639B1 (en) 2007-10-15 2007-12-07 Fuel injection device

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US (1) US7931007B2 (en)
EP (1) EP2203639B1 (en)
JP (1) JP5145423B2 (en)
KR (1) KR101432566B1 (en)
CN (1) CN101828028B (en)
DE (1) DE102007049357A1 (en)
WO (1) WO2009049687A1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7942132B2 (en) * 2008-07-17 2011-05-17 Robert Bosch Gmbh In-line noise filtering device for fuel system
EP2251541B1 (en) * 2009-05-11 2011-11-30 Continental Automotive GmbH Fuel injector and fuel injection system
US8781186B2 (en) * 2010-05-04 2014-07-15 Pathfinder Therapeutics, Inc. System and method for abdominal surface matching using pseudo-features
DE102011075057A1 (en) * 2011-05-02 2012-11-08 Robert Bosch Gmbh Fuel distributor and system with a fuel injector
JP2013072416A (en) * 2011-09-29 2013-04-22 Otics Corp Fuel delivery pipe
JP5955198B2 (en) * 2012-11-02 2016-07-20 株式会社ケーヒン Support structure for direct injection fuel injection valve
JP6074793B2 (en) 2012-11-05 2017-02-08 株式会社ケーヒン Support structure for fuel injection valve
JP6074794B2 (en) 2012-11-05 2017-02-08 株式会社ケーヒン Support structure for fuel injection valve
DE102012220491A1 (en) * 2012-11-09 2014-05-15 Robert Bosch Gmbh Fuel injection valve and fuel injection system with a fuel injection valve
DE102013200781A1 (en) * 2013-01-18 2014-07-24 Robert Bosch Gmbh Fuel injection system with a fuel-carrying component, a fuel injection valve and a connection arrangement
JP2014196730A (en) * 2013-03-29 2014-10-16 トヨタ自動車株式会社 Fuel supply pipe
DE102013207368A1 (en) * 2013-04-23 2014-10-23 Robert Bosch Gmbh Holder for mounting a fuel distributor to an internal combustion engine and system with such a holder
ES2700356T3 (en) * 2013-06-14 2019-02-15 Fpt Motorenforschung Ag Arrangement of fuel pipes in common-rail fuel supply systems
CN104948277B (en) * 2015-06-30 2018-05-04 苏州派格丽减排系统有限公司 A kind of air-free pump water-cooled nozzle
KR101938481B1 (en) * 2017-06-23 2019-01-14 주식회사 현대케피코 Clip for injector
FR3083829B1 (en) * 2018-07-10 2021-01-08 Senior Flexonics Blois Sas COMMON RAMP INJECTION DEVICE
FR3083830B1 (en) * 2018-07-16 2021-10-01 Senior Flexonics Blois Sas COMMON RAMP INJECTION DEVICE
CN110848061B (en) * 2019-06-28 2025-02-18 潍柴动力股份有限公司 Micro leakage device and common rail pipe
CN112393895B (en) * 2019-08-14 2022-07-15 宝山钢铁股份有限公司 Cold rolling mill fine cooling injection valve dynamic and static characteristic parameter testing device and testing method

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693223A (en) * 1984-06-21 1987-09-15 General Motors Corporation Fuel injection valve connection
US5373824A (en) * 1993-08-06 1994-12-20 Ford Motor Company Acoustical damping device for gaseous fueled automotive engines
US5394850A (en) * 1993-11-19 1995-03-07 Siemens Electric Limited Top-feed fuel injector mounting in an integrated air-fuel system
DE4341368A1 (en) * 1993-12-04 1995-06-08 Bosch Gmbh Robert Damper for pressure oscillations in IC engine fuel circuit
JPH08312495A (en) * 1995-05-11 1996-11-26 Keihin Seiki Mfg Co Ltd Electromagnetic fuel injection valve
JPH09151830A (en) * 1995-11-30 1997-06-10 Mikuni Corp Fuel injection device
JP3831970B2 (en) * 1996-03-14 2006-10-11 株式会社デンソー Fuel injection device for internal combustion engine
US5785022A (en) * 1997-05-28 1998-07-28 Epic Technical Group, Inc. Fuel injector post
JP4156147B2 (en) * 1999-10-05 2008-09-24 臼井国際産業株式会社 Fuel delivery pipe
GB2358898B (en) * 1999-12-09 2002-04-24 Usui Kokusai Sangyo Kk Diesel engine fuel injection pipe
DE60115629T2 (en) * 2000-03-21 2006-06-29 Siemens Ag FUEL INJECTION DEVICE FOR FASTENING AND ORIENTATION OF A FUEL INJECTION VALVE TO A FUEL DISTRIBUTOR
DE10032678A1 (en) * 2000-07-05 2002-01-17 Daimler Chrysler Ag Injection device for internal combustion engine, has pipe-shaped connection integrated to the connecting flange for drawing off fuel or fuel gases
US20020043249A1 (en) * 2000-10-16 2002-04-18 Ki-Ho Lee Fuel rail with intergal dampening features
JP4053340B2 (en) * 2002-04-18 2008-02-27 臼井国際産業株式会社 Fuel delivery pipe
JP4032385B2 (en) * 2002-04-22 2008-01-16 臼井国際産業株式会社 Fuel delivery pipe
JP2004028076A (en) * 2002-05-08 2004-01-29 Usui Kokusai Sangyo Kaisha Ltd Fuel delivery pipe
US6905002B2 (en) * 2002-06-21 2005-06-14 International Engine Intellectual Property Company, Llc Acoustic wave attenuator for a rail
US6742504B2 (en) * 2002-06-21 2004-06-01 International Engine Intellectual Property Company, Llc Pressure wave attenuator for a rail
JP2004027964A (en) * 2002-06-25 2004-01-29 Aisin Seiki Co Ltd Fuel supply device for vehicle
US6761150B2 (en) * 2002-11-05 2004-07-13 Millennium Industries Corp. Fuel rail flow-feed pulse damper
JP2004211637A (en) * 2003-01-07 2004-07-29 Denso Corp High pressure fuel accumulator
US6935314B2 (en) * 2003-12-19 2005-08-30 Millennium Industries Corp. Fuel rail air damper
DE102004048401A1 (en) 2004-10-01 2006-04-06 Robert Bosch Gmbh Downholder for a fuel injector and fuel injector
DE102005026992A1 (en) 2005-06-10 2006-12-14 Robert Bosch Gmbh High pressure accumulator with integrated throttle and filter element
US7093584B1 (en) * 2005-08-19 2006-08-22 Delphi Technologies, Inc. Fuel injector noise mufflers
JP4442567B2 (en) * 2006-01-20 2010-03-31 株式会社デンソー Common rail
US7617991B2 (en) * 2006-03-31 2009-11-17 Delphi Technologies, Inc. Injector fuel filter with built-in orifice for flow restriction
US7406946B1 (en) * 2007-04-02 2008-08-05 Hitachi, Ltd. Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber
US7681553B2 (en) * 2007-08-10 2010-03-23 Pulsco, Inc. Nested three chambers, fluid pulsation dampener

Also Published As

Publication number Publication date
JP2011501020A (en) 2011-01-06
JP5145423B2 (en) 2013-02-20
CN101828028B (en) 2015-05-27
WO2009049687A1 (en) 2009-04-23
KR101432566B1 (en) 2014-08-22
US7931007B2 (en) 2011-04-26
US20100218742A1 (en) 2010-09-02
CN101828028A (en) 2010-09-08
KR20100065193A (en) 2010-06-15
EP2203639A1 (en) 2010-07-07
DE102007049357A1 (en) 2009-04-16

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