EP2705240B1 - Fuel distributor - Google Patents

Fuel distributor Download PDF

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Publication number
EP2705240B1
EP2705240B1 EP12709847.3A EP12709847A EP2705240B1 EP 2705240 B1 EP2705240 B1 EP 2705240B1 EP 12709847 A EP12709847 A EP 12709847A EP 2705240 B1 EP2705240 B1 EP 2705240B1
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EP
European Patent Office
Prior art keywords
screw element
fuel
screw
housing part
external thread
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
EP12709847.3A
Other languages
German (de)
French (fr)
Other versions
EP2705240A1 (en
Inventor
Markus Feigl
Holger UHRIG
Julian WEISS
Nikolaus Hautmann
Dietmar Uhlenbrock
Martin GOEHNER
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Publication date
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Priority to PL12709847T priority Critical patent/PL2705240T3/en
Publication of EP2705240A1 publication Critical patent/EP2705240A1/en
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Publication of EP2705240B1 publication Critical patent/EP2705240B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the invention relates to a fuel distributor, in particular a fuel distributor strip for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the invention is suitable for fuel injection systems designed as medium-pressure systems.
  • Fuel direct injection fuel rail direct injection fuel injection systems which operate under high pressure and are used for motor vehicles, may use steel or aluminum as the construction material.
  • fuel distribution rails for fuel injection systems with intake manifold injection however, thin-walled steel pipes, plastic pipes or optionally also aluminum pipes can be used.
  • high pressure fuel injection systems operate at about 20 MPa (200 bar) in particular, the low cost fuel injection systems for low pressure applications typically operate at only 0.3 MPa to 0.5 MPa or 3 to 5 bar.
  • a high pressure port may be attached to the steel main pipe by a brazing process.
  • a plastic pipe In a plastic pipe, however, can be made by a suitable welding process, a connection.
  • the fuel distributor in particular for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines, known, comprising a fuel space enclosed by at least one housing part.
  • the fuel distributor has a screw and a sealing ring, wherein on the housing part a recess is provided into which the screw is screwed, wherein the sealing ring between the screw and the housing part forms a seal and wherein the screw has an external thread.
  • an annular groove is designed which receives the sealing ring. From the installation position, the sealing ring rushes into the external thread of the screw element, so that the annular groove is arranged between the external thread of the screw element and an end of the screw element facing the fuel chamber on the screw element.
  • the metallic housing part has an internal thread, which cooperates with the external thread of the screw to a fixed connection when screwing the screw.
  • the fuel distributor according to the invention with the features of claim 1 has the advantage that a connection suitable for medium pressure, in particular for a connection or closure, can be created with comparatively low production costs.
  • the housing part is made of plastic, in particular as a plastic injection molded part.
  • plastic in particular as a plastic injection molded part.
  • the annular groove is advantageous for the annular groove to be arranged between the external thread of the screw element and an end of the screw element facing the fuel chamber on the screw element. It is advantageous that the sealing ring leads the external thread of the screw.
  • the sealing ring seals the region of the external thread of the screw element with respect to the fuel chamber. Chips and other impurities in the area of the external thread can thus not get further inward, that is to say into the fuel space. In addition, these chips and possibly other impurities can not escape to the outside. Thus, existing contaminants remain trapped in the area of the external thread. Impairment of the functionality of the fuel injection system during operation are thereby avoided from the outset.
  • the screw element is configured as a connection element with a connection piece and a through hole leading from the connection piece into the fuel space.
  • a suitable connection for a medium pressure can be realized.
  • a fuel line may be mounted to lead into the fuel space of the fuel manifold under a certain pressure fuel.
  • the connection can be realized in an advantageous manner by screws, in particular self-tapping screwing.
  • the fuel distributor can be configured as an elongate fuel distributor, wherein a connection element is provided at one end and a closure at the other end.
  • the fuel distributor can optionally also be adapted to different installation conditions.
  • the screw has the external thread and that the annular groove is formed on the screw, which receives the sealing ring.
  • an inner diameter of the annular groove is smaller than a threaded inner diameter of the external thread of the screw. This makes it possible that the sealing ring is not loaded when screwing and thus not damaged.
  • the seat of the sealing ring on a smaller diameter is additionally advantageous, as a result of the hydraulically effective diameter smaller and thus the forces are lower.
  • the external thread of the screw has a conical thread form with a steeper angle than a cylindrical or conical shape of the recess of the housing part. Due to the conical thread shape, which has a steeper angle than, for example, a Entformschräge of a plastic injection molding, which forms the housing part, the first thread is formed less in the plastic component than the last thread. Thus arises at the first thread of the screw, which is a possible predetermined breaking point of the preferably tubular housing part, a smaller notch with the advantage of high strength of the housing part, in particular of the tubular housing part, and in the last threads quite a noticeable transmitted load occurs. As a result, the screw can be configured optimally short, so that the cost of materials is reduced and a required space is small.
  • longitudinal ribs or transverse ribs are configured on the housing part in a longitudinal direction and / or transverse direction to an axis of the screw element.
  • the stability of the housing part made of plastic can be improved.
  • the wall thickness is limited. It is advantageous that, at least in the region of the screw element, a length of the longitudinal ribs or a spacing of the transverse ribs from one another is greater than a threaded length of the external thread of the screw element screwed into the housing part. As a result, the force can be transmitted beyond the notch of the first thread on the unnotched, higher-strength region of the housing part.
  • Fig. 1 shows a first embodiment of a fuel distributor 1 of the invention in a partial, schematic sectional view.
  • the fuel distributor 1 can in this case be configured in particular in the form of a fuel distributor strip 1.
  • the fuel distributor 1 is particularly suitable for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel distributor 1 is suitable for a medium-pressure system.
  • the mean pressure for such a medium-pressure system can be in the range of 3 MPa to 10 MPa or 30 bar to 100 bar.
  • the mean pressure may be in the range of 5 MPa to 7 MPa or 50 bar to 70 bar.
  • the fuel distributor 1 according to the invention is also suitable for other applications.
  • the fuel distributor 1 has at least one housing part 2, which encloses a fuel space 3.
  • the housing part 2 may form the housing 2 of the fuel distributor 1. However, the housing may also be formed by a plurality of housing parts 2.
  • the housing part 2 has a recess 4, on which an internal thread 5 is configured.
  • a screw 6 which has an external thread 7.
  • the screw 6 is screwed with its external thread 7 in the recess 4 with the internal thread 5.
  • the screw element 6 has a connection piece 8 and a through bore 9 leading from the connection piece 8 into the fuel space 3.
  • an external thread 10 and a cone 11 can be configured on the connecting piece 8.
  • the connection piece 8 can in this case be designed in accordance with a high-pressure connection in order, for example, to allow the connection of a fuel line. Fuel can be fed from a pump into the fuel chamber 3 of the fuel distributor 1 via the fuel line.
  • a screw plate 12 is also provided, which rests in the screwed state on an end face 13 of the housing part 2 and limits the screwing of the screw 6 into the recess 4 of the housing part 2.
  • the screw 6 is designed as a connection element 6.
  • the screw 6 can also be configured as a closure. This eliminates the through hole 9.
  • the connection piece 8 can be omitted.
  • the fuel distributor 1 has a sealing ring 14.
  • the sealing ring 14 forms a seal between the screw element 6 and the housing part 2. As a result, the fuel chamber 3 is sealed in the region of the screw 6 relative to the environment.
  • the sealing ring 14 is preferably configured in the initial state as an O-ring 14 with approximately circular profile.
  • the sealing ring 14 is preferably fuel-resistant, in particular gasoline resistant, designed.
  • the sealing ring 14 is low temperature resistant, preferably to -30 ° C or even at lower temperatures resistant configured.
  • the screw 6 has an annular groove 15 which receives the sealing ring 14.
  • An inner diameter 16 of the annular groove 15 is predetermined smaller than a threaded inner diameter 17 of the external thread 7 of the screw 6.
  • the annular groove 15 is disposed between the external thread 7 of the screw 6 and a fuel chamber 3 facing the end 18 of the screw 6.
  • the sealing ring 14 is therefore first moved along a wall of the recess 4.
  • the cutting of the internal thread 5 of the recess 4 is preferably carried out by self-tapping and self-tapping screwing the screw 6.
  • the sealing ring 14 is therefore moved along a smooth wall, so that it is not actuated.
  • the external thread 10 cuts into the wall of the recess 4, so that the internal thread 5 of the recess 4 is configured.
  • the sealing ring 14 leads the external thread 7 of the screw 6 before.
  • a transverse bore 20 may be provided, which is provided for example between the sealing ring 14 and the external thread 7 of the screwed screw 6 on the housing part 2.
  • the external thread 7 of the screw 6 preferably has a conical thread shape, which tapers in a direction 21 to the fuel chamber 3 out.
  • the recess 4 of the housing part 2 may also have a conical shape.
  • the conical thread form of the external thread 7 of the screw 6 is designed with a steeper angle than a cylindrical or conical shape of the recess 4 of the housing part 2.
  • the sealing ring 14 after assembly has a defined position, in particular with respect to the transverse bore 20.
  • Fig. 2 shows a fuel distributor 1 according to a second embodiment of the invention in a partial, schematic representation.
  • the housing part 2 is formed here as a plastic injection molding.
  • the wall thickness in such a plastic injection molding (plastic injection molded part) 2 is limited.
  • longitudinal ribs 22, 23, 24 and transverse ribs 25, 26 are configured on the housing part 2.
  • the longitudinal ribs 22 to 24 can in this case as axial Huaweirippen 22 to 24 serve.
  • To simplify the illustration are in the Fig. 2 only the ribs 22 to 26 marked.
  • a length 27 of the longitudinal ribs 22 to 24 or a distance 27 of the transverse ribs 25, 26 from each other is greater than a thread length 28 (FIG. Fig. 1 ) of the screwed into the housing part 2 external thread 7 of the screw 6.
  • the force is transmitted beyond the notch of the first thread addition to the reverse, higher-strength region of the screw 6.
  • the housing part 2 is made of plastic, created. The screwing of the screw 6 can in this case via a suitable drive 29, which is designed on the screw 6, take place.
  • the longitudinal ribs 22 to 24 are configured in a longitudinal direction 21 with respect to an axis 31 of the screw element 6.
  • the transverse ribs 25, 26 are configured in a transverse direction 30 with respect to the axis 31 of the screw element 6.

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

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Brennstoffverteiler, insbesondere eine Brennstoffverteilerleiste für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen. Speziell eignet sich die Erfindung für als Mitteldrucksysteme ausgestaltete Brennstoffeinspritzanlagen.The invention relates to a fuel distributor, in particular a fuel distributor strip for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines. In particular, the invention is suitable for fuel injection systems designed as medium-pressure systems.

Bei Brennstoffverteilerrails für direkteinspritzende Brennstoffeinspritzanlagen, die unter hohem Druck arbeiten und für Kraftfahrzeuge dienen, kann Stahl oder Aluminium als Konstruktionswerkstoff eingesetzt werden. Bei Brennstoffverteilerrails für Brennstoffeinspritzanlagen mit Saugrohreinspritzung können hingegen dünnwandige Stahlrohre, Kunststoffrohre oder gegebenenfalls auch Aluminiumrohre zum Einsatz kommen. Während Brennstoffeinspritzanlagen für Hochdruckanwendungen insbesondere bei etwa 20 MPa (200 bar) arbeiten, sind die kostengünstigen Brennstoffeinspritzanlagen für Niederdruckanwendungen in der Regel bei lediglich 0,3 MPa bis 0,5 MPa beziehungsweise 3 bar bis 5 bar einsetzbar.Fuel direct injection fuel rail direct injection fuel injection systems, which operate under high pressure and are used for motor vehicles, may use steel or aluminum as the construction material. In fuel distribution rails for fuel injection systems with intake manifold injection, however, thin-walled steel pipes, plastic pipes or optionally also aluminum pipes can be used. While high pressure fuel injection systems operate at about 20 MPa (200 bar) in particular, the low cost fuel injection systems for low pressure applications typically operate at only 0.3 MPa to 0.5 MPa or 3 to 5 bar.

Bei einem Brennstoffverteilerrail aus Stahl ist es denkbar, dass ein Hochdruckanschluss durch einen Lötprozess an dem Hauptrohr aus Stahl befestigt wird. Verfahrenstechnisch ist dies bei einem Kunststoffrohr nicht möglich. Bei einem Kunststoffrohr kann allerdings durch einen geeigneten Schweißprozess eine Verbindung hergestellt werden.In a steel fuel rail, it is conceivable that a high pressure port may be attached to the steel main pipe by a brazing process. Technically, this is not possible with a plastic pipe. In a plastic pipe, however, can be made by a suitable welding process, a connection.

Aus der DE 197 56 102 A1 ist bereits ein Brennstoffverteiler, insbesondere für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen, bekannt, der einen von zumindest einem Gehäuseteil umschlossenen Brennstoffraum umfasst. Außerdem besitzt der Brennstoffverteiler ein Schraubelement und einen Dichtring, wobei an dem Gehäuseteil eine Ausnehmung vorgesehen ist, in die das Schraubelement eingeschraubt ist, wobei der Dichtring zwischen dem Schraubelement und dem Gehäuseteil eine Abdichtung ausbildet und wobei das Schraubelement ein Außengewinde aufweist. An dem Schraubelement ist eine Ringnut ausgestaltet, die den Dichtring aufnimmt. Von der Einbauposition her eilt der Dichtring dem Außengewinde des Schraubelements vor, so dass die Ringnut zwischen dem Außengewinde des Schraubelements und einem dem Brennstoffraum zugewandten Ende des Schraubelements an dem Schraubelement angeordnet ist. In der Ausnehmung weist das metallische Gehäuseteil ein Innengewinde auf, das beim Verschrauben des Schraubelements mit dem Außengewinde des Schraubelements zu einer festen Verbindung zusammenwirkt.From the DE 197 56 102 A1 is already a fuel distributor, in particular for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines, known, comprising a fuel space enclosed by at least one housing part. In addition, the fuel distributor has a screw and a sealing ring, wherein on the housing part a recess is provided into which the screw is screwed, wherein the sealing ring between the screw and the housing part forms a seal and wherein the screw has an external thread. At the screw an annular groove is designed which receives the sealing ring. From the installation position, the sealing ring rushes into the external thread of the screw element, so that the annular groove is arranged between the external thread of the screw element and an end of the screw element facing the fuel chamber on the screw element. In the recess, the metallic housing part has an internal thread, which cooperates with the external thread of the screw to a fixed connection when screwing the screw.

Offenbarung der ErfindungDisclosure of the invention

Der erfindungsgemäße Brennstoffverteiler mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass eine für einen Mitteldruck geeignete Verbindung, insbesondere für einen Anschluss oder Verschluss, mit vergleichsweise niedrigen Herstellungskosten geschaffen werden kann.The fuel distributor according to the invention with the features of claim 1 has the advantage that a connection suitable for medium pressure, in particular for a connection or closure, can be created with comparatively low production costs.

In vorteilhafter Weise ist das Gehäuseteil aus Kunststoff, insbesondere als Kunststoffspritzling, ausgebildet. Hierdurch ist eine kostengünstige Herstellung möglich.Advantageously, the housing part is made of plastic, in particular as a plastic injection molded part. As a result, a cost-effective production is possible.

Ferner ist es vorteilhaft, dass die Ringnut zwischen dem Außengewinde des Schraubelements und einem dem Brennstoffraum zugewandten Ende des Schraubelements an dem Schraubelement angeordnet ist. Hierbei ist es vorteilhaft, dass der Dichtring dem Außengewinde des Schraubelements voreilt. Somit kann eine Ausgestaltung realisiert werden, bei der der in der Ringnut angeordnete Dichtring beim Einschrauben des Schraubelements dem Außengewinde voreilt. Spezielle Vorteile ergeben sich hierbei bei einem selbstfurchenden Einschrauben. Der Dichtring dichtet den Bereich des Außengewindes des Schraubelements bezüglich des Brennstoffraums ab. Späne und andere Verunreinigungen im Bereich des Außengewindes können somit nicht weiter nach innen, das heißt in den Brennstoffraum, gelangen. Außerdem können diese Späne und gegebenenfalls andere Verunreinigungen auch nicht nach außen gelangen. Somit bleiben im Bereich des Außengewindes bestehende Verunreinigungen eingeschlossen. Beeinträchtigungen der Funktionsfähigkeit der Brennstoffeinspritzanlage im Betrieb werden hierdurch von vornherein vermieden.Furthermore, it is advantageous for the annular groove to be arranged between the external thread of the screw element and an end of the screw element facing the fuel chamber on the screw element. It is advantageous that the sealing ring leads the external thread of the screw. Thus, a configuration can be realized in which the sealing ring arranged in the annular groove leads the external thread when the screw element is screwed in. Special advantages result from a self-tapping screwing. The sealing ring seals the region of the external thread of the screw element with respect to the fuel chamber. Chips and other impurities in the area of the external thread can thus not get further inward, that is to say into the fuel space. In addition, these chips and possibly other impurities can not escape to the outside. Thus, existing contaminants remain trapped in the area of the external thread. Impairment of the functionality of the fuel injection system during operation are thereby avoided from the outset.

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

Vorteilhaft ist es, dass das Schraubelement als Anschlusselement mit einem Anschlussstück und einer von dem Anschlussstück in den Brennstoffraum führenden Durchgangsbohrung ausgestaltet ist. Hierdurch kann ein für einen Mitteldruck geeigneter Anschluss realisiert werden. An solch einem Anschluss kann eine Brennstoffleitung montiert werden, um in den Brennstoffraum des Brennstoffverteilers unter einem gewissen Druck stehenden Brennstoff zu führen. Der Anschluss kann hierbei in vorteilhafter Weise durch Schrauben, insbesondere selbstfurchendes Einschrauben, realisiert werden.It is advantageous that the screw element is configured as a connection element with a connection piece and a through hole leading from the connection piece into the fuel space. As a result, a suitable connection for a medium pressure can be realized. At such a port, a fuel line may be mounted to lead into the fuel space of the fuel manifold under a certain pressure fuel. The connection can be realized in an advantageous manner by screws, in particular self-tapping screwing.

Vorteilhaft ist es allerdings auch, dass zumindest ein Schraubelement als Verschluss ausgestaltet ist. Beispielsweise kann der Brennstoffverteiler als länglicher Brennstoffverteiler ausgestaltet sein, wobei an einem Ende ein Anschlusselement und an dem anderen Ende ein Verschluss vorgesehen sind. Hierdurch kann der Brennstoffverteiler gegebenenfalls auch an unterschiedliche Einbauverhältnisse angepasst werden.However, it is also advantageous that at least one screw element is designed as a closure. For example, the fuel distributor can be configured as an elongate fuel distributor, wherein a connection element is provided at one end and a closure at the other end. As a result, the fuel distributor can optionally also be adapted to different installation conditions.

Vorteilhaft ist es, dass das Schraubelement das Außengewinde aufweist und dass an dem Schraubelement die Ringnut ausgestaltet ist, die den Dichtring aufnimmt. Hierbei ist es ferner vorteilhaft, dass ein Innendurchmesser der Ringnut kleiner ist als ein Gewindeinnendurchmesser des Außengewindes des Schraubelements. Hierdurch ist es möglich, dass der Dichtring beim Einschrauben nicht belastet und damit nicht beschädigt wird. Der Sitz des Dichtrings auf einem kleineren Durchmesser ist zusätzlich vorteilhaft, da hierdurch der hydraulisch wirksame Durchmesser kleiner und damit die auftretenden Kräfte geringer sind.It is advantageous that the screw has the external thread and that the annular groove is formed on the screw, which receives the sealing ring. Here, it is also advantageous that an inner diameter of the annular groove is smaller than a threaded inner diameter of the external thread of the screw. This makes it possible that the sealing ring is not loaded when screwing and thus not damaged. The seat of the sealing ring on a smaller diameter is additionally advantageous, as a result of the hydraulically effective diameter smaller and thus the forces are lower.

Ferner ist es vorteilhaft, dass das Außengewinde des Schraubelements eine konische Gewindeform mit einem steileren Winkel als eine zylindrische oder konische Form der Ausnehmung des Gehäuseteils aufweist. Durch die konische Gewindeform, die einen steileren Winkel als beispielsweise eine Entformschräge eines Kunststoffspritzlings, der das Gehäuseteil bildet, aufweist, ist der erste Gewindegang geringer in das Kunststoffbauteil eingefurcht als der letzte Gewindegang. Somit entsteht am ersten Gewindegang der Schraube, an dem eine mögliche Sollbruchstelle des vorzugsweise rohrförmigen Gehäuseteils besteht, eine geringere Kerbe mit dem Vorteil einer hohen Festigkeit des Gehäuseteils, insbesondere des rohrförmigen Gehäuseteils, und bei den letzten Gewindegängen tritt durchaus noch eine erkennbare übertragene Last auf. Hierdurch kann das Schraubelement optimal kurz ausgestaltet werden, so dass der Materialaufwand verringert und ein benötigter Bauraum gering sind.Furthermore, it is advantageous that the external thread of the screw has a conical thread form with a steeper angle than a cylindrical or conical shape of the recess of the housing part. Due to the conical thread shape, which has a steeper angle than, for example, a Entformschräge of a plastic injection molding, which forms the housing part, the first thread is formed less in the plastic component than the last thread. Thus arises at the first thread of the screw, which is a possible predetermined breaking point of the preferably tubular housing part, a smaller notch with the advantage of high strength of the housing part, in particular of the tubular housing part, and in the last threads quite a noticeable transmitted load occurs. As a result, the screw can be configured optimally short, so that the cost of materials is reduced and a required space is small.

Ferner ist es vorteilhaft, dass an dem Gehäuseteil in einer Längsrichtung und/oder Querrichtung zu einer Achse des Schraubelements Längsrippen beziehungsweise Querrippen ausgestaltet sind. Dadurch kann die Stabilität des aus Kunststoff hergestellten Gehäuseteils verbessert werden. Speziell bei einem Kunststoffspritzling ist die Wandstärke begrenzt. Vorteilhaft ist es, dass zumindest im Bereich des Schraubelements eine Länge der Längsrippen beziehungsweise ein Abstand der Querrippen voneinander größer ist als eine in das Gehäuseteil eingeschraubte Gewindelänge des Außengewindes des Schraubelements. Hierdurch kann die Kraft über die Kerbe des ersten Gewindegangs hinaus auf den ungekerbten, höherfesten Bereich des Gehäuseteils übertragen werden.Furthermore, it is advantageous that longitudinal ribs or transverse ribs are configured on the housing part in a longitudinal direction and / or transverse direction to an axis of the screw element. As a result, the stability of the housing part made of plastic can be improved. Especially with a plastic injection molding, the wall thickness is limited. It is advantageous that, at least in the region of the screw element, a length of the longitudinal ribs or a spacing of the transverse ribs from one another is greater than a threaded length of the external thread of the screw element screwed into the housing part. As a result, the force can be transmitted beyond the notch of the first thread on the unnotched, higher-strength region of the housing part.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

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

  • Fig. 1 einen Brennstoffverteiler in einer auszugsweisen, schematischen Schnittdarstellung entsprechend einem ersten Ausführungsbeispiel der Erfindung und
  • Fig. 2 einen Brennstoffverteiler in einer auszugsweisen, schematischen Darstellung entsprechend einem zweiten Ausführungsbeispiel der Erfindung.
Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with identical reference numerals. It shows:
  • Fig. 1 a fuel distributor in a partial, schematic sectional view according to a first embodiment of the invention and
  • Fig. 2 a fuel distributor in an excerpt, schematic representation according to a second embodiment of the invention.

Ausführungsformen der ErfindungEmbodiments of the invention

Fig. 1 zeigt ein erstes Ausführungsbeispiel eines Brennstoffverteilers 1 der Erfindung in einer auszugsweisen, schematischen Schnittdarstellung. Der Brennstoffverteiler 1 kann hierbei insbesondere in Form einer Brennstoffverteilerleiste 1 ausgestaltet sein. Der Brennstoffverteiler 1 eignet sich besonders für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen. Speziell eignet sich der Brennstoffverteiler 1 hierbei für ein Mitteldrucksystem. Der Mitteldruck für solch ein Mitteldrucksystem kann hierbei im Bereich von 3 MPa bis 10 MPa beziehungsweise 30 bar bis 100 bar liegen. Insbesondere kann der Mitteldruck im Bereich von 5 MPa bis 7 MPa beziehungsweise 50 bar bis 70 bar liegen. Der erfindungsgemäße Brennstoffverteiler 1 eignet sich allerdings auch für andere Anwendungsfälle. Fig. 1 shows a first embodiment of a fuel distributor 1 of the invention in a partial, schematic sectional view. The fuel distributor 1 can in this case be configured in particular in the form of a fuel distributor strip 1. The fuel distributor 1 is particularly suitable for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines. In particular, the fuel distributor 1 is suitable for a medium-pressure system. The mean pressure for such a medium-pressure system can be in the range of 3 MPa to 10 MPa or 30 bar to 100 bar. In particular, the mean pressure may be in the range of 5 MPa to 7 MPa or 50 bar to 70 bar. However, the fuel distributor 1 according to the invention is also suitable for other applications.

Der Brennstoffverteiler 1 weist zumindest ein Gehäuseteil 2 auf, das einen Brennstoffraum 3 umschließt. Das Gehäuseteil 2 kann das Gehäuse 2 des Brennstoffverteilers 1 bilden. Das Gehäuse kann allerdings auch durch mehrere Gehäuseteile 2 gebildet sein. Das Gehäuseteil 2 weist eine Ausnehmung 4 auf, an der ein Innengewinde 5 ausgestaltet ist.The fuel distributor 1 has at least one housing part 2, which encloses a fuel space 3. The housing part 2 may form the housing 2 of the fuel distributor 1. However, the housing may also be formed by a plurality of housing parts 2. The housing part 2 has a recess 4, on which an internal thread 5 is configured.

Ferner ist ein Schraubelement 6 vorgesehen, das ein Außengewinde 7 aufweist. Das Schraubelement 6 ist mit seinem Außengewinde 7 in die Ausnehmung 4 mit dem Innengewinde 5 eingeschraubt.Furthermore, a screw 6 is provided which has an external thread 7. The screw 6 is screwed with its external thread 7 in the recess 4 with the internal thread 5.

In diesem Ausführungsbeispiel weist das Schraubelement 6 ein Anschlussstück 8 und eine von dem Anschlussstück 8 in den Brennstoffraum 3 führende Durchgangsbohrung 9 auf. An dem Anschlussstück 8 können ein Außengewinde 10 und ein Konus 11 ausgestaltet sein. Das Anschlussstück 8 kann hierbei entsprechend einem Hochdruckanschluss ausgebildet sein, um beispielsweise den Anschluss einer Brennstoffleitung zu ermöglichen. Über die Brennstoffleitung kann Brennstoff von einer Pumpe in den Brennstoffraum 3 des Brennstoffverteilers 1 geführt werden.In this exemplary embodiment, the screw element 6 has a connection piece 8 and a through bore 9 leading from the connection piece 8 into the fuel space 3. On the connecting piece 8, an external thread 10 and a cone 11 can be configured. The connection piece 8 can in this case be designed in accordance with a high-pressure connection in order, for example, to allow the connection of a fuel line. Fuel can be fed from a pump into the fuel chamber 3 of the fuel distributor 1 via the fuel line.

An dem Schraubelement 6 ist außerdem ein Schraubenteller 12 vorgesehen, der im eingeschraubten Zustand an einer Stirnseite 13 des Gehäuseteils 2 anliegt und das Einschrauben des Schraubelements 6 in die Ausnehmung 4 des Gehäuseteils 2 begrenzt.On the screw 6, a screw plate 12 is also provided, which rests in the screwed state on an end face 13 of the housing part 2 and limits the screwing of the screw 6 into the recess 4 of the housing part 2.

In diesem Ausführungsbeispiel ist das Schraubelement 6 als Anschlusselement 6 ausgestaltet. Das Schraubelement 6 kann allerdings auch als Verschluss ausgestaltet sein. Hierbei entfällt die Durchgangsbohrung 9. Ferner kann dann auch das Anschlussstück 8 entfallen.In this embodiment, the screw 6 is designed as a connection element 6. However, the screw 6 can also be configured as a closure. This eliminates the through hole 9. Furthermore, then the connection piece 8 can be omitted.

Der Brennstoffverteiler 1 weist einen Dichtring 14 auf. Der Dichtring 14 bildet zwischen dem Schraubelement 6 und dem Gehäuseteil 2 eine Abdichtung. Hierdurch ist der Brennstoffraum 3 im Bereich des Schraubelements 6 gegenüber der Umgebung abgedichtet. Der Dichtring 14 ist im Ausgangszustand vorzugsweise als O-Ring 14 mit näherungsweise kreisförmigem Profil ausgestaltet. Der Dichtring 14 ist vorzugsweise brennstoffbeständig, insbesondere benzinbeständig, ausgestaltet. Ferner ist der Dichtring 14 tieftemperaturbeständig, vorzugsweise bis -30° C oder auch bei tieferen Temperaturen beständig, ausgestaltet.The fuel distributor 1 has a sealing ring 14. The sealing ring 14 forms a seal between the screw element 6 and the housing part 2. As a result, the fuel chamber 3 is sealed in the region of the screw 6 relative to the environment. The sealing ring 14 is preferably configured in the initial state as an O-ring 14 with approximately circular profile. The sealing ring 14 is preferably fuel-resistant, in particular gasoline resistant, designed. Furthermore, the sealing ring 14 is low temperature resistant, preferably to -30 ° C or even at lower temperatures resistant configured.

Das Schraubelement 6 weist eine Ringnut 15 auf, die den Dichtring 14 aufnimmt. Ein Innendurchmesser 16 der Ringnut 15 ist hierbei kleiner als ein Gewindeinnendurchmesser 17 des Außengewindes 7 des Schraubelements 6 vorgegeben. Hierdurch wird der Dichtring 14 beim Einschrauben nicht belastet und damit nicht beschädigt. Außerdem wird ein kleinerer hydraulisch wirksamer Durchmesser erzielt und die auftretenden Kräfte sind geringer.The screw 6 has an annular groove 15 which receives the sealing ring 14. An inner diameter 16 of the annular groove 15 is predetermined smaller than a threaded inner diameter 17 of the external thread 7 of the screw 6. As a result, the sealing ring 14 is not loaded when screwing and thus not damaged. In addition, a smaller hydraulically effective diameter is achieved and the forces are lower.

Die Ringnut 15 ist zwischen dem Außengewinde 7 des Schraubelements 6 und einem dem Brennstoffraum 3 zugewandten Ende 18 des Schraubelements 6 angeordnet. Beim Einschrauben des Schraubelements 6 in die Ausnehmung 4 wird daher zunächst der Dichtring 14 entlang einer Wand der Ausnehmung 4 bewegt. Das Schneiden des Innengewindes 5 der Ausnehmung 4 erfolgt vorzugsweise durch selbstfurchendes und selbstschneidendes Einschrauben des Schraubelements 6. Der Dichtring 14 wird daher entlang einer glatten Wand bewegt, so dass dieser nicht betätigt wird. Nachfolgend schneidet sich das Außengewinde 10 in die Wand der Ausnehmung 4, so dass das Innengewinde 5 der Ausnehmung 4 ausgestaltet wird. Der Dichtring 14 eilt dem Außengewinde 7 des Schraubelements 6 vor.The annular groove 15 is disposed between the external thread 7 of the screw 6 and a fuel chamber 3 facing the end 18 of the screw 6. When screwing the screw 6 into the recess 4, the sealing ring 14 is therefore first moved along a wall of the recess 4. The cutting of the internal thread 5 of the recess 4 is preferably carried out by self-tapping and self-tapping screwing the screw 6. The sealing ring 14 is therefore moved along a smooth wall, so that it is not actuated. Subsequently, the external thread 10 cuts into the wall of the recess 4, so that the internal thread 5 of the recess 4 is configured. The sealing ring 14 leads the external thread 7 of the screw 6 before.

Zwischen dem Dichtring 14 und dem Schraubenteller 12 ist somit eine Abdichtung des Bereichs des Außengewindes 7 des Schraubelements 6 einerseits in Bezug auf den Brennstoffraum 3 und andererseits in Bezug auf die Umgebung gewährleistet. Während des selbstfurchenden und selbstschneidenden Einschraubens entstehende Späne oder andere Fremdkörper bleiben somit eingesperrt und können nicht in den Brennstoffraum 3 gelangen.Between the sealing ring 14 and the screw plate 12 thus a seal of the region of the external thread 7 of the screw 6 is ensured on the one hand with respect to the fuel chamber 3 and on the other hand in relation to the environment. During the self-tapping and self-tapping screwing resulting chips or other foreign matter thus remain locked and can not get into the fuel chamber 3.

Speziell bei glasfaserverstärkten Kunststoffen ist ein selbstschneidendes Einschrauben, das durch Schneidkanten des Schraubelements 6 ermöglicht wird, vorteilhaft.Especially with glass fiber reinforced plastics, a self-tapping screwing, which is made possible by cutting edges of the screw 6, advantageous.

Um die Dichtheitsprüfung der durch den Dichtring 14 gebildeten Abdichtung zu erleichtern, kann eine Querbohrung 20 vorgesehen sein, die beispielsweise zwischen dem Dichtring 14 und dem Außengewinde 7 des eingeschraubten Schraubelements 6 an dem Gehäuseteil 2 vorgesehen ist.In order to facilitate the tightness test of the seal formed by the sealing ring 14, a transverse bore 20 may be provided, which is provided for example between the sealing ring 14 and the external thread 7 of the screwed screw 6 on the housing part 2.

Das Außengewinde 7 des Schraubelements 6 hat vorzugsweise eine konische Gewindeform, die sich in einer Richtung 21 zu dem Brennstoffraum 3 hin verjüngt. Die Ausnehmung 4 des Gehäuseteils 2 kann ebenfalls eine konische Form aufweisen. In beiden Fällen ist die konische Gewindeform des Außengewindes 7 des Schraubelements 6 mit einem steileren Winkel als eine zylindrische oder konische Form der Ausnehmung 4 des Gehäuseteils 2 ausgeführt. Somit ergibt sich am ersten Gewindegang des Schraubelements 6 eine geringere Kerbe mit dem Vorteil einer hohen Festigkeit des Schraubelements 6 sowie des Gehäuseteils 2. Ferner wird auch bei den letzten Gewindegängen durchaus noch eine erkennbare Last übertragen. Hierdurch kann die Schraube optimal kurz ausgeführt werden. Andernfalls würden die ersten Gänge einen Großteil der Last tragen, während die hinteren Gewindegänge fast nichts beitragen würden. Das Schraubelement 6 wäre dann auch unnötig lang.The external thread 7 of the screw 6 preferably has a conical thread shape, which tapers in a direction 21 to the fuel chamber 3 out. The recess 4 of the housing part 2 may also have a conical shape. In both cases, the conical thread form of the external thread 7 of the screw 6 is designed with a steeper angle than a cylindrical or conical shape of the recess 4 of the housing part 2. Thus, at the first thread of the screw 6 results in a lower notch with the advantage of high strength of the screw 6 and the housing part 2. Furthermore, even in the last threads quite a noticeable load transmitted. This allows the screw to be optimally short. Otherwise, the first gears would carry a majority of the load, while the rear threads would contribute almost nothing. The screw 6 would then be unnecessarily long.

Der Vorteil der stärkeren Konizität des Schraubelements 6 in Bezug auf das Gehäuseteil 2 ist somit eine verbesserte Festigkeit des Schraubelements 6 mit einem optimal kurzen Außengewinde 7.The advantage of the greater conicity of the screw 6 with respect to the housing part 2 is thus an improved strength of the screw 6 with an optimally short external thread. 7

Durch den Schraubenteller 12, der als Anschlag dient, hat der Dichtring 14 nach der Montage eine definierte Position, insbesondere bezüglich der Querbohrung 20. Außerdem wird durch den Schraubenteller 12 erreicht, dass beim Einschrauben erzeugte Späne auch an diesem Ende am Austreten gehindert werden.By the screw plate 12, which serves as a stop, the sealing ring 14 after assembly has a defined position, in particular with respect to the transverse bore 20. In addition, it is achieved by the screw plate 12 that generated when screwing chips are prevented from escaping at this end.

Fig. 2 zeigt einen Brennstoffverteiler 1 entsprechend einem zweiten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen Darstellung. Das Gehäuseteil 2 ist hierbei als Kunststoffspritzling ausgebildet. Die Wandstärke bei solch einem Kunststoffspritzling (Kunststoffspritzteil) 2 ist begrenzt. Um die Festigkeit zu verbessern, sind Längsrippen 22, 23, 24 und Querrippen 25, 26 an dem Gehäuseteil 2 ausgestaltet. Hierdurch kann die Festigkeit durch eine korbähnliche Anformung von Rippen 22 bis 26 verbessert werden. Die Längsrippen 22 bis 24 können hierbei als axiale Zugrippen 22 bis 24 dienen. Zur Vereinfachung der Darstellung sind in der Fig. 2 nur die Rippen 22 bis 26 gekennzeichnet. Fig. 2 shows a fuel distributor 1 according to a second embodiment of the invention in a partial, schematic representation. The housing part 2 is formed here as a plastic injection molding. The wall thickness in such a plastic injection molding (plastic injection molded part) 2 is limited. To improve the strength, longitudinal ribs 22, 23, 24 and transverse ribs 25, 26 are configured on the housing part 2. As a result, the strength can be improved by a basket-like Anformung of ribs 22 to 26. The longitudinal ribs 22 to 24 can in this case as axial Zugrippen 22 to 24 serve. To simplify the illustration are in the Fig. 2 only the ribs 22 to 26 marked.

Eine Länge 27 der Längsrippen 22 bis 24 beziehungsweise ein Abstand 27 der Querrippen 25, 26 voneinander ist größer als eine Gewindelänge 28 (Fig. 1) des in das Gehäuseteil 2 eingeschraubten Außengewindes 7 des Schraubelements 6. Hierdurch wird die Kraft über die Kerbe des ersten Gewindeganges hinaus auf den umgekehrten, höherfesten Bereich des Schraubelements 6 übertragen. Somit kann basierend auf der vorhandenen Geometrie der Gewindeflanken des selbstfurchenden Schraubelements 6 ein hochfester und dichter Anschluss oder Verschluss für den druckfesten Brennstoffverteiler 1, dessen Gehäuseteil 2 aus Kunststoff hergestellt ist, geschaffen werden. Das Einschrauben des Schraubelements 6 kann hierbei über einen geeigneten Antrieb 29, der an dem Schraubelement 6 ausgestaltet ist, erfolgen.A length 27 of the longitudinal ribs 22 to 24 or a distance 27 of the transverse ribs 25, 26 from each other is greater than a thread length 28 (FIG. Fig. 1 ) of the screwed into the housing part 2 external thread 7 of the screw 6. As a result, the force is transmitted beyond the notch of the first thread addition to the reverse, higher-strength region of the screw 6. Thus, based on the existing geometry of the thread flanks of the self-tapping screw 6, a high-strength and tight connection or closure for the pressure-resistant fuel distributor 1, the housing part 2 is made of plastic, created. The screwing of the screw 6 can in this case via a suitable drive 29, which is designed on the screw 6, take place.

Die Längsrippen 22 bis 24 sind in einer Längsrichtung 21 bezüglich einer Achse 31 des Schraubelements 6 ausgestaltet. Die Querrippen 25, 26 sind in einer Querrichtung 30 bezüglich der Achse 31 des Schraubelements 6 ausgestaltet.The longitudinal ribs 22 to 24 are configured in a longitudinal direction 21 with respect to an axis 31 of the screw element 6. The transverse ribs 25, 26 are configured in a transverse direction 30 with respect to the axis 31 of the screw element 6.

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

Claims (7)

  1. Fuel distributor (1), in particular for fuel injection systems of mixture-compressing, applied-ignition internal combustion engines, with a fuel chamber (3) enclosed by at least one housing part (2), with at least one screw element (6), and with at least one sealing ring (14), wherein a recess (4), into which the screw element (6) is screwed, is provided on the housing part (2), wherein the sealing ring (14) forms a seal between the screw element (6) and the housing part (2), wherein the screw element (6) has an external thread (7), wherein an annular groove (15), which accommodates the sealing ring (14), is formed on the screw element (6), and wherein the sealing ring (14) leads the external thread (7) of the screw element (6), with the result that the annular groove (15) is arranged on the screw element (6) between the external thread (7) of the screw element (6) and an end (18) of the screw element (6) that faces the fuel chamber (3),
    characterized in that
    the housing part (2) is formed from plastic, in particular as a plastic injection moulding, with the result that the chips produced when the screw element (6) is screwed in in a self-tapping and self-cutting manner do not pass into the fuel chamber (3).
  2. Fuel distributor according to Claim 1,
    characterized in that
    the screw element (6) is configured as a connection element (6) with a connection piece (8) and with a through-bore (9) leading from the connection piece (8) into the fuel chamber (3).
  3. Fuel distributor according to Claim 1 or 2,
    characterized in that
    at least one screw element (6) is configured as a closure (6).
  4. Fuel distributor according to one of Claims 1 to 3,
    characterized in that
    an inside diameter (16) of the annular groove (15) is smaller than a thread inside diameter (17) of the external thread (7) of the screw element (6).
  5. Fuel distributor according to one of Claims 1 to 4,
    characterized in that
    the external thread (7) of the screw element (6) has a conical thread shape with a steeper angle than a cylindrical or conical shape of the recess (4) of the housing part (2).
  6. Fuel distributor according to Claim 1,
    characterized in that
    longitudinal ribs (22-24) and/or transverse ribs (25, 26) are formed on the housing part (2) in a longitudinal direction (21) and/or a transverse direction (30) with respect to an axis (31) of the screw element (6).
  7. Fuel distributor according to Claim 6,
    characterized in that,
    at least in the region of the screw element (6), a length (27) of the longitudinal ribs (22-24) or a spacing (27) of the transverse ribs (25, 26) from one another is greater than a thread length (28) of the external thread (7), which is screwed into the housing part (2), of the screw element (6).
EP12709847.3A 2011-05-02 2012-03-15 Fuel distributor Active EP2705240B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12709847T PL2705240T3 (en) 2011-05-02 2012-03-15 Fuel distributor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011075059A DE102011075059A1 (en) 2011-05-02 2011-05-02 fuel distributor
PCT/EP2012/054516 WO2012150073A1 (en) 2011-05-02 2012-03-15 Fuel distributor

Publications (2)

Publication Number Publication Date
EP2705240A1 EP2705240A1 (en) 2014-03-12
EP2705240B1 true EP2705240B1 (en) 2017-05-10

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ID=45872939

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EP12709847.3A Active EP2705240B1 (en) 2011-05-02 2012-03-15 Fuel distributor

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EP (1) EP2705240B1 (en)
CN (1) CN103502624B (en)
DE (1) DE102011075059A1 (en)
PL (1) PL2705240T3 (en)
RU (1) RU2601012C2 (en)
WO (1) WO2012150073A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6546771B2 (en) * 2015-04-15 2019-07-17 臼井国際産業株式会社 Gasoline direct injection rail

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19758817B4 (en) * 1997-12-17 2010-08-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Holder for a fuel injection valve on the cylinder head of an internal combustion engine
DE19853090A1 (en) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Fuel injection system
DE19932699B4 (en) * 1999-07-15 2005-03-17 Itw Henschel Gmbh Fuel rail for an injection gasoline engine
GB2399392A (en) * 2003-03-13 2004-09-15 Visteon Global Tech Inc I.c. engine moulded fuel rail with crash-resistant protecting structure
JP4438450B2 (en) * 2003-04-07 2010-03-24 株式会社デンソー Piping joint device and assembly method thereof
DE102006020692A1 (en) * 2006-05-04 2007-11-08 Robert Bosch Gmbh Pressure control valve with emergency drive and ventilation function
CN100557227C (en) * 2007-11-27 2009-11-04 无锡威孚高科技股份有限公司 The combined rail that is used for high pressure co-rail system
DE102008017151B3 (en) * 2008-04-03 2009-08-27 Continental Automotive Gmbh Fuel injection system for an internal combustion engine
CN201786519U (en) * 2010-09-20 2011-04-06 合肥恒信汽车发动机部件制造有限公司 Plastic dispenser for fuel oil

Also Published As

Publication number Publication date
EP2705240A1 (en) 2014-03-12
WO2012150073A1 (en) 2012-11-08
CN103502624B (en) 2017-06-09
RU2013153134A (en) 2015-06-10
PL2705240T3 (en) 2017-10-31
CN103502624A (en) 2014-01-08
RU2601012C2 (en) 2016-10-27
DE102011075059A1 (en) 2012-11-08

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