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EP3165760A1 - Fuel distributor - Google Patents

Fuel distributor Download PDF

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Publication number
EP3165760A1
EP3165760A1 EP16196928.2A EP16196928A EP3165760A1 EP 3165760 A1 EP3165760 A1 EP 3165760A1 EP 16196928 A EP16196928 A EP 16196928A EP 3165760 A1 EP3165760 A1 EP 3165760A1
Authority
EP
European Patent Office
Prior art keywords
tubular body
fuel distributor
support
distributor according
cylinder head
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.)
Granted
Application number
EP16196928.2A
Other languages
German (de)
French (fr)
Other versions
EP3165760B1 (en
Inventor
Jonas Schultz
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP3165760A1 publication Critical patent/EP3165760A1/en
Application granted granted Critical
Publication of EP3165760B1 publication Critical patent/EP3165760B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M55/02—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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/857—Mounting of fuel injection apparatus characterised by mounting fuel or common rail to engine

Definitions

  • the invention relates to a fuel distributor according to the features in the preamble of claim 1.
  • a fuel distributor is part of a fuel supply or a fuel injection system and serves to supply fuel to injection valves of an internal combustion engine.
  • statically compressed fuel is stored in a pressure accumulator tube and distributed to the injectors or injection valves of a cylinder bank.
  • the DE 295 21 402 U1 discloses a fuel rail in which the tubular body of the accumulator tube is formed by forging with forged technically molded connection piece. On the connecting piece diametrically opposite lateral surface of the tubular body fasteners are formed. The fasteners form eyelets in which through holes are made by drilling.
  • the DE 10 2011 079 075 A1 discloses a fuel rail with a pressure accumulator tube, which has a tubular body with a longitudinal cavity and at least one connecting piece or an injector receptacle.
  • a pressure accumulator tube which has a tubular body with a longitudinal cavity and at least one connecting piece or an injector receptacle.
  • the connecting straps are located to the side of the pipe body.
  • the accumulator tube is preferably made by forging.
  • the pressure storage tubes are exposed to high loads. This also applies in particular to the area of connection of the pressure storage tubes to the cylinder head of an internal combustion engine.
  • the mounting points of the fuel rail on the engine block are specified by the manufacturer and vary from model to model.
  • moments are introduced into the connection.
  • the attachment between pressure accumulator tube and cylinder head is particularly difficult if it has to be inclined at an angle. As a result, the fastening means are additionally loaded.
  • the invention is based on the prior art, the task of creating a weight-optimized, production and assembly technology advantageous and improved in load behavior fuel distributor.
  • the fuel rail has an accumulator tube for receiving pressurized fuel.
  • the accumulator tube has a forged tubular body with a longitudinal cavity.
  • the longitudinal cavity usually has one circular cross-section.
  • Uniformly integrally formed on the tubular body support-shaped injector and supports are formed. The supports serve to fix the accumulator tube to a cylinder head of an internal combustion engine.
  • the accumulator tube is forged from a blank.
  • the material used is in particular a stainless steel alloy of the type 1.4307 or 1.4301.
  • the supports are formed in alignment with the injector receptacles on the tubular body.
  • This embodiment enables a forging technology production of the pressure storage tube, the forging blank is process reliably forgeable including the material uniformly integrally formed on the tubular body Injektoritn and the supports.
  • the supports are executed on the forging blank in an axis with the injector receivers within the parting plane of the forging tool. After forging, there is a mechanical processing, in particular a machining of the forged component, including the production of the holes for the longitudinal cavity in the tubular body and the connection holes in the Injektoritn.
  • the supports are aligned with the Injektoritied to this provided below the tubular body.
  • Below the tubular body means with respect to the mounting position of the pressure accumulator tube on the cylinder head that the supports point from the tubular body in the direction of the cylinder head.
  • a support has a leg section extending from the tubular body and, at its cylinder head end, a flange section with a passage for passing through a fastening screw.
  • the flange portion is located at the free end of a support, so it is displaced close to the region of the connection to the cylinder head. hereby shortens the span length of the fastening screws used to determine the fuel rail on the cylinder head.
  • the support has, in particular in its leg portion, a recess extending in its longitudinal direction.
  • the recess is machined in the support, in particular the recess is milled out in the support.
  • the recess forms a free space for mounting the fastening screws.
  • the recess is located in the inner region of the support and ends at the flange portion. Cylinder head side, the recess is bounded by a clamping surface of the flange. The clamping surface is arranged on the side facing away from the cylinder head of the flange. At her lies the screw head of a fastening screw.
  • An essential aspect of the invention is that the screwing takes place via the flange section close to the connection region or the area of fixing the supports to the cylinder head. For this comparatively short screws can be used.
  • the installation of the mounting surface down to the cylinder head also reduces the compliance of the mounting screws.
  • the flange portion has a support surface adapted to the outer contour of the cylinder head.
  • the support surface is made oblique. Due to the slope of the support surface is increased on the cylinder head and so large that the surface pressure remains within a permissible range, at least below a critical surface pressure.
  • Another essential aspect of the invention is that the screw axis, which extends in the longitudinal direction of a fastening screw, and the longitudinal axis of a support at an angle at an angle to each other.
  • a further advantageous aspect is that the longitudinal axis of the support intersects the central longitudinal axis of the tubular body.
  • the clamping surface is within an enveloping circle, which is drawn around the outer circumferential surface of the support.
  • the measured transverse to the longitudinal axis of the tubular body width of the support is smaller than the diameter of the tubular body measured transversely to the longitudinal axis of the tubular body.
  • the measures described above contribute to the compactness of the fuel distributor or its pressure storage tube.
  • the fatigue strength of the accumulator tube is increased.
  • the surface pressure in the connection region of the pressure accumulator tube to the cylinder head to an acceptable level.
  • the fuel distributor according to the invention reliably withstands deformations as a result of bending alternating stresses from operational, static and dynamic loads.
  • the fuel distributor is weight-optimized.
  • An advantageous and stress-optimized effect is when a support is arranged in each case between two injector receptacles in the longitudinal direction of the tubular body.
  • the overall functionality of the fuel distributor is further increased when integrally formed on the tubular body in one piece at least one, usually more coupling pieces for attachment of attachments.
  • the coupling pieces can serve, for example, for receiving sleeves and screw connection means, via which further system components, for example an intake module, can be mounted on the fuel distributor.
  • the fuel rail 1 belongs to the accumulator injection system of an internal combustion engine.
  • the pressure generation and the fuel injection are decoupled from each other in such storage injection systems.
  • a separate high-pressure pump continuously generates pressure. This pressure, which is built up independently of the injection sequence, is permanently available in the fuel distributor 1.
  • the fuel distributor 1 comprises a pressure accumulator tube 2 with a pump-side fuel inlet 3 and a plurality of injector ports 4, 5.
  • the statically compressed fuel is stored in the pressure accumulator tube 2 and distributed through the injector ports 4, 5 the injectors of a cylinder bank available.
  • the pressure accumulator tube 2 has a forged tubular body 6.
  • a longitudinal cavity 7 is introduced by deep drilling.
  • the end of the tubular body 6 is closed by means of plugs 8.
  • Material unitarily forging technology is formed on the tubular body 6 is still a nozzle-shaped receptacle 9 for mounting a pressure sensor.
  • the nozzle-shaped running fuel inlet 3 is uniform material integrally formed forging technology on the tubular body 6. After the production of forging blank this is machined.
  • the connection openings or holes in the injector ports 4, 5, in the fuel inlet 3 and the receptacle 9 are produced.
  • integral unitary supports 11 are formed on the tubular body 6. In the embodiment shown here two supports 11 are provided.
  • the supports 11 are rectified to the Injektoritn 4, 5 and arranged in line with these in the longitudinal direction LR of the tubular body 6. It can be seen that in each case a support 11 is arranged between two injector receptacles 4 and 5 respectively.
  • the longitudinal axes L1 of the supports 11 and the longitudinal axes L2 of the Injektoritn 4, 5 coincide.
  • supports 11 and injector 4, 5 allows an advantageous forging technology production of the tubular body 6.
  • Supports 11 and injector 4, 5 are arranged together in the parting plane of the forging tool or the forging tool halves and oriented rectified. As a result, the risk of tool breakage or cracks and folds in the forged supports 11 is counteracted.
  • Each support 11 has a leg portion 12 extending from the tubular body 6 and, at its cylinder head end 13, a flange portion 14 with a passage 15 for the passage of a fastening screw 16.
  • a leg portion 12 extending from the tubular body 6 and, at its cylinder head end 13, a flange portion 14 with a passage 15 for the passage of a fastening screw 16.
  • In the supports 11 and in the leg portion 12 of the supports 11 is in each case one in the longitudinal direction of the support 11 extending recess 17 is provided. This is machined by milling incorporated into the supports 11.
  • the flange portion 14 has on its side facing away from the cylinder head 10 a clamping surface 18 for the screw heads 19 of the mounting screws 16. Furthermore, the flange portion 14 has a cylinder head side adapted to the outer contour of the cylinder head 10 support surface 20. With the support surface 20 of the flange portion 14 abuts the cylinder head 10.
  • the fastening screws 16 are via the recess 17 and the passages 15 in corresponding threaded holes in the cylinder head 10th screwed. In this case, the screw heads 19 come to rest on the clamping surface 18 of the flange section 14.
  • the support surface 20 of the flange portion 14 is particularly oblique. As a result, the area of the system between the flange portion 14 and the cylinder head 10 can be increased and thus the surface pressure can be reduced.
  • the outer contour of the cylinder head 10 is inclined correspondingly obliquely in the connection region of the fuel rail.
  • the screw axis L3 extending in the longitudinal direction of a fastening screw 16 and the longitudinal axis L1 of a support 11 extend at an angle ⁇ at an angle to one another. Furthermore, the Verschraubungsachse L3 and the longitudinal axis L1 of the support 11 intersect at an intersection SP, the intersection point SP is in the plane of the support surface 20.
  • the geometric configuration of the pressure accumulator tube 2 is further designed so that the longitudinal axes L1 of the supports 11 intersect the central longitudinal axis MLA of the tubular body 6.
  • the transverse to the central longitudinal axis MLA of the tubular body 6 measured width b1 of a support 11 is smaller than that transverse to the longitudinal axis L4 of the tubular body 6 measured diameter d1 of the tubular body. 6
  • the tubular body 6 On the tubular body 6 are further integrally formed integrally coupling pieces 21 for attachment of attachments.
  • the coupling pieces 21 are used to define sleeves 22, as in the FIG. 2 to recognize. Through the sleeves 22 , erharmsstoff 23 can be performed, via which further attachment components can be set on the fuel rail 1.

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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)

Abstract

Die Erfindung zeigt einen Kraftstoffverteiler, welcher ein Druckspeicherrohr (2) zur Aufnahme von unter Druck stehendem Kraftstoff aufweist, wobei das Druckspeicherrohr (2) einen geschmiedeten Rohrkörper (6) besitzt, an welchem materialeinheitlich einstückig stutzenförmige Injektoraufnahmen (4, 5) sowie Stützen (11) ausgeformt sind und das Druckspeicherrohr (2) über die Stützen (11) mittels Befestigungsschrauben (16) am Zylinderkopf (18) einer Brennkraftmaschine festlegbar ist. Die Stützen (11) sind fluchtend zu den Injektoraufnahmen (4, 5) am Rohrkörper (6) angeordnet.The invention relates to a fuel distributor, which has a pressure accumulator tube (2) for receiving pressurized fuel, wherein the pressure accumulator tube (2) has a forged tubular body (6) on which integrally nozzle-shaped injector receptacles (4, 5) and supports (11 ) are formed and the pressure accumulator tube (2) via the supports (11) by means of fastening screws (16) on the cylinder head (18) of an internal combustion engine can be fixed. The supports (11) are arranged in alignment with the injector receptacles (4, 5) on the tubular body (6).

Description

Die Erfindung betrifft einen Kraftstoffverteiler gemäß den Merkmalen im Oberbegriff von Patentanspruch 1.The invention relates to a fuel distributor according to the features in the preamble of claim 1.

Ein Kraftstoffverteiler ist Bestandteil einer Kraftstoffversorgung bzw. eines Kraftstoff-Einspritzsystems und dient zum Zuführen von Kraftstoff zu Einspritzventilen eines Verbrennungsmotors. Hierbei wird statisch komprimierter Kraftstoff in einem Druckspeicherrohr gespeichert und verteilt den Injektoren bzw. Einspritzventilen einer Zylinderbank zur Verfügung gestellt.A fuel distributor is part of a fuel supply or a fuel injection system and serves to supply fuel to injection valves of an internal combustion engine. In this case, statically compressed fuel is stored in a pressure accumulator tube and distributed to the injectors or injection valves of a cylinder bank.

Aus der DE 102 47 524 B4 ist ein Kraftstoffverteiler bekannt mit einem einteilig als Gußteil ausgeführten Druckspeicherrohr.From the DE 102 47 524 B4 is a fuel distributor known with a one-piece designed as a casting accumulator tube.

Die DE 295 21 402 U1 offenbart einen Kraftstoffverteiler, bei dem der Rohrkörper des Druckspeicherrohrs durch Schmieden geformt ist mit schmiedetechnisch angeformten Anschlussstutzen. Auf der den Anschlussstutzen diametral gegenüberliegenden Mantelfläche des Rohrkörpers sind Befestigungselemente angeformt. Die Befestigungselemente bilden Befestigungsösen, in welchen durch Bohren Durchgangslöcher hergestellt sind.The DE 295 21 402 U1 discloses a fuel rail in which the tubular body of the accumulator tube is formed by forging with forged technically molded connection piece. On the connecting piece diametrically opposite lateral surface of the tubular body fasteners are formed. The fasteners form eyelets in which through holes are made by drilling.

Auch die DE 10 2011 079 075 A1 offenbart einen Kraftstoffverteiler mit einem Druckspeicherrohr, welches einen Rohrkörper mit einem Längshohlraum und mindestens einem Anschlussstutzen bzw. einer Injektoraufnahme aufweist. Zum Befestigen des Druckspeicherrohrs in einem Fahrzeug dienen angeformte Anschlusslaschen. Die Anschlusslaschen befinden sich seitlich neben dem Rohrkörper. Das Druckspeicherrohr ist vorzugsweise durch Schmieden hergestellt.Also the DE 10 2011 079 075 A1 discloses a fuel rail with a pressure accumulator tube, which has a tubular body with a longitudinal cavity and at least one connecting piece or an injector receptacle. To fix the pressure accumulator tube in a vehicle serve molded connecting lugs. The connecting straps are located to the side of the pipe body. The accumulator tube is preferably made by forging.

Da innerhalb des Kraftstoff-Einspritzsystems und in den Druckspeicherrohren im Besonderen sehr hohe Drücke entstehen, sind die Druckspeicherrohre hohen Belastungen ausgesetzt. Dies gilt insbesondere auch für den Bereich der Anbindung der Druckspeicherrohre am Zylinderkopf einer Brennkraftmaschine. Die Montagepunkte des Kraftstoffverteilers am Motorblock sind durch den Hersteller vorgegeben und von Modell zu Modell unterschiedlich. Hierbei können je nach Einbaulage, insbesondere bei einseitigen Befestigungsbedingungen, Momente in die Verbindung eingeleitet werden. Besonders schwierig gestaltet sich die Befestigung zwischen Druckspeicherrohr und Zylinderkopf, wenn diese unter einem Winkel schräg erfolgen muss. Hierdurch werden die Befestigungsmittel zusätzlich belastet.Since very high pressures occur within the fuel injection system and in the pressure storage tubes in particular, the pressure storage tubes are exposed to high loads. This also applies in particular to the area of connection of the pressure storage tubes to the cylinder head of an internal combustion engine. The mounting points of the fuel rail on the engine block are specified by the manufacturer and vary from model to model. Here, depending on the installation position, in particular in one-sided fastening conditions, moments are introduced into the connection. The attachment between pressure accumulator tube and cylinder head is particularly difficult if it has to be inclined at an angle. As a result, the fastening means are additionally loaded.

Der Erfindung liegt ausgehend vom Stand der Technik die Aufgabe zugrunde, einen gewichtsoptimierten, fertigungs- sowie montagetechnisch vorteilhaften und im Belastungsverhalten verbesserten Kraftstoffverteiler zu schaffen.The invention is based on the prior art, the task of creating a weight-optimized, production and assembly technology advantageous and improved in load behavior fuel distributor.

Die Lösung dieser Aufgabe besteht nach der Erfindung in einem Kraftstoffverteiler gemäß Patentanspruch 1.The solution to this problem consists according to the invention in a fuel distributor according to claim 1.

Vorteilhafte Ausgestaltungen und Weiterbildungen des erfindungsmäßen Kraftstoffverteilers sind Gegenstand der abhängigen Patentansprüche 2 bis 11.Advantageous embodiments and further developments of the fuel distributor according to the invention are the subject of the dependent claims 2 to 11.

Der Kraftstoffverteiler weist ein Druckspeicherrohr zur Aufnahme von unter Druck stehendem Kraftstoff auf. Das Druckspeicherrohr besitzt einen geschmiedeten Rohrkörper mit einem Längshohlraum. Der Längshohlraum besitzt in der Regel einen kreisförmigen Querschnitt. Materialeinheitlich einstückig sind am Rohrkörper stützenförmige Injektoraufnahmen sowie Stützen ausgeformt. Die Stützen dienen zur Festlegung des Druckspeicherrohrs an einem Zylinderkopf einer Brennkraftmaschine.The fuel rail has an accumulator tube for receiving pressurized fuel. The accumulator tube has a forged tubular body with a longitudinal cavity. The longitudinal cavity usually has one circular cross-section. Uniformly integrally formed on the tubular body support-shaped injector and supports are formed. The supports serve to fix the accumulator tube to a cylinder head of an internal combustion engine.

Das Druckspeicherrohr wird aus einem Rohling geschmiedet. Als Werkstoff kommt insbesondere eine nicht rostende Edelstahllegierung des Werkstofftyps 1.4307 oder 1.4301 zur Anwendung.The accumulator tube is forged from a blank. The material used is in particular a stainless steel alloy of the type 1.4307 or 1.4301.

Erfindungsgemäß sind die Stützen fluchtend zu den Injektoraufnahmen am Rohrkörper ausgeformt. Das bedeutet, die Injektoraufnahmen und die Stützen des Druckspeicherrohrs sind gleichgerichtet quer vom Rohrkörper ausgehend und entlang einer geraden Linie in der Mittellängsebene angeordnet. Diese Ausgestaltung ermöglicht eine schmiedetechnische Herstellung des Druckspeicherrohrs, wobei der Schmiederohling prozesssicher schmiedbar ist einschließlich der am Rohrkörper materialeinheitlich einstückig ausgeformten Injektoraufnahmen und der Stützen. Die Stützen werden am Schmiederohling in einer Achse mit den Injektoraufnahmen innerhalb der Trennebene des Schmiedewerkzeugs ausgeführt. Nach dem Schmieden erfolgt eine mechanische Bearbeitung, insbesondere eine spanabhebende Bearbeitung des geschmiedeten Bauteils, einschließlich der Herstellung der Bohrungen für den Längshohlraum im Rohrkörper sowie der Anschlussbohrungen in den Injektoraufnahmen.According to the invention, the supports are formed in alignment with the injector receptacles on the tubular body. This means that the Injektoraufnahmen and the supports of the accumulator tube are rectified transversely from the tubular body and arranged along a straight line in the central longitudinal plane. This embodiment enables a forging technology production of the pressure storage tube, the forging blank is process reliably forgeable including the material uniformly integrally formed on the tubular body Injektoraufnahmen and the supports. The supports are executed on the forging blank in an axis with the injector receivers within the parting plane of the forging tool. After forging, there is a mechanical processing, in particular a machining of the forged component, including the production of the holes for the longitudinal cavity in the tubular body and the connection holes in the Injektoraufnahmen.

Die Stützen sind fluchtend zu den Injektoraufnahmen gleichgerichtet zu diesen unterhalb des Rohrkörpers vorgesehen. Unterhalb des Rohrkörpers bedeutet in Bezug auf die Montageposition des Druckspeicherrohrs am Zylinderkopf, dass die Stützen vom Rohrkörper ausgehend in Richtung zum Zylinderkopf weisen.The supports are aligned with the Injektoraufnahmen rectified to this provided below the tubular body. Below the tubular body means with respect to the mounting position of the pressure accumulator tube on the cylinder head that the supports point from the tubular body in the direction of the cylinder head.

Ein Aspekt der Erfindung sieht vor, dass eine Stütze einen vom Rohrkörper ausgehenden Schenkelabschnitt sowie an ihrem zylinderkopfseitigen Ende einen Flanschabschnitt mit einem Durchgang zur Durchführung einer Befestigungsschraube aufweist. Der Flanschabschnitt befindet sich am freien Ende einer Stütze, ist also nahe in den Bereich der Anbindung an den Zylinderkopf verlagert. Hierdurch verkürzt sich die Spannlänge der zur Festlegung des Kraftstoffverteilers am Zylinderkopf eingesetzten Befestigungsschrauben.One aspect of the invention provides that a support has a leg section extending from the tubular body and, at its cylinder head end, a flange section with a passage for passing through a fastening screw. The flange portion is located at the free end of a support, so it is displaced close to the region of the connection to the cylinder head. hereby shortens the span length of the fastening screws used to determine the fuel rail on the cylinder head.

Besonders vorteilhaft weist die Stütze insbesondere in ihrem Schenkelabschnitt eine sich in ihrer Längsrichtung erstreckende Ausnehmung auf. Die Ausnehmung ist spanabhebend in der Stütze hergestellt, insbesondere ist die Ausnehmung in der Stütze ausgefräst. Die Ausnehmung bildet einen Freiraum für die Montage der Befestigungsschrauben. Die Ausnehmung befindet sich im inneren Bereich der Stütze und endet am Flanschabschnitt. Zylinderkopfseitig wird die Ausnehmung von einer Spannfläche des Flanschabschnitts begrenzt. Die Spannfläche ist an der dem Zylinderkopf abgewandten Seite des Flanschabschnitts angeordnet. An ihr liegt der Schraubenkopf einer Befestigungsschraube an. Ein wesentlicher Aspekt der Erfindung besteht darin, dass die Verschraubung über den Flanschabschnitt nahe im Verbindungsbereich bzw. dem Bereich der Festlegung der Stützen am Zylinderkopf erfolgt. Hierzu können vergleichsweise kurze Schrauben eingesetzt werden. Die Verlegung der Anschraubfläche nach unten zum Zylinderkopf hin reduziert zudem die Nachgiebigkeit der Befestigungsschrauben.Particularly advantageously, the support has, in particular in its leg portion, a recess extending in its longitudinal direction. The recess is machined in the support, in particular the recess is milled out in the support. The recess forms a free space for mounting the fastening screws. The recess is located in the inner region of the support and ends at the flange portion. Cylinder head side, the recess is bounded by a clamping surface of the flange. The clamping surface is arranged on the side facing away from the cylinder head of the flange. At her lies the screw head of a fastening screw. An essential aspect of the invention is that the screwing takes place via the flange section close to the connection region or the area of fixing the supports to the cylinder head. For this comparatively short screws can be used. The installation of the mounting surface down to the cylinder head also reduces the compliance of the mounting screws.

Eine für die Praxis besonders vorteilhafte Ausgestaltung sieht vor, dass der Flanschabschnitt eine an die Außenkontur des Zylinderkopfs angepasste Abstützfläche aufweist. Insbesondere ist die Abstützfläche schräg ausgeführt. Durch die Schräge wird die Abstützfläche auf dem Zylinderkopf vergrößert und so groß, dass die Flächenpressung in einem zulässigen Bereich, jedenfalls unterhalb einer kritischen Flächenpressung bleibt.A particularly advantageous embodiment for the practice provides that the flange portion has a support surface adapted to the outer contour of the cylinder head. In particular, the support surface is made oblique. Due to the slope of the support surface is increased on the cylinder head and so large that the surface pressure remains within a permissible range, at least below a critical surface pressure.

Ein weiterer wesentlicher Aspekt der Erfindung besteht darin, dass die Verschraubungsachse, die sich in Längsrichtung einer Befestigungsschraube erstreckt, und die Längsachse einer Stütze in einem Winkel schräg zueinander verlaufen.Another essential aspect of the invention is that the screw axis, which extends in the longitudinal direction of a fastening screw, and the longitudinal axis of a support at an angle at an angle to each other.

Weiterhin trägt zur Erhöhung der Dauerfestigkeit und damit der Lebensdauer und Betriebssicherheit bei, wenn sich die Verschraubungsachse und die Längsachse der Stütze in einem Schnittpunkt schneiden, wobei der Schnittpunkt in der Abstützfläche liegt.Furthermore contributes to increasing the fatigue strength and thus the life and reliability when the Verschraubungsachse and the longitudinal axis of the support intersect at an intersection, the intersection is in the support surface.

Ein weiterhin vorteilhafter Aspekt besteht darin, dass die Längsachse der Stütze die Mittellängsachse des Rohrkörpers schneidet.A further advantageous aspect is that the longitudinal axis of the support intersects the central longitudinal axis of the tubular body.

Die Spannfläche liegt innerhalb eines Hüllkreises, der um die Außenmantelfläche der Stütze gezogen ist. Hierbei ist die quer zur Längsachse des Rohrkörpers gemessene Breite der Stütze kleiner als der quer zur Längsachse des Rohrkörpers gemessener Durchmesser des Rohrkörpers.The clamping surface is within an enveloping circle, which is drawn around the outer circumferential surface of the support. Here, the measured transverse to the longitudinal axis of the tubular body width of the support is smaller than the diameter of the tubular body measured transversely to the longitudinal axis of the tubular body.

Insgesamt tragen die vorbeschriebenen Maßnahmen zur Kompaktheit des Kraftstoffverteilers bzw. dessen Druckspeicherrohrs bei. Die Dauerfestigkeit des Druckspeicherrohrs ist erhöht. Ferner ist die Flächenpressung im Anbindungsbereich des Druckspeicherrohrs an den Zylinderkopf in einem zulässigen Maß. Der erfindungsgemäße Kraftstoffverteiler hält Verformungen in Folge von Biegewechselspannungen aus betrieblichen, statischen sowie dynamischen Belastungen zuverlässig Stand. Weiterhin ist der Kraftstoffverteiler gewichtsoptimiert.Overall, the measures described above contribute to the compactness of the fuel distributor or its pressure storage tube. The fatigue strength of the accumulator tube is increased. Furthermore, the surface pressure in the connection region of the pressure accumulator tube to the cylinder head to an acceptable level. The fuel distributor according to the invention reliably withstands deformations as a result of bending alternating stresses from operational, static and dynamic loads. Furthermore, the fuel distributor is weight-optimized.

Vorteilhaft und belastungsoptimiert wirkt sich aus, wenn eine Stütze in Längsrichtung des Rohrkörpers jeweils zwischen zwei Injektoraufnahmen angeordnet ist.An advantageous and stress-optimized effect is when a support is arranged in each case between two injector receptacles in the longitudinal direction of the tubular body.

Die Gesamtfunktionalität des Kraftstoffverteilers wird weiterhin erhöht, wenn am Rohrkörper materialeinheitlich einstückig zumindest ein, in der Regel mehrere Koppelstücke zur Befestigung von Anbauteilen ausgebildet sind. Die Koppelstücke können beispielsweise zur Aufnahme von Hülsen und Schraubverbindungsmittel dienen, über welche weitere Anlagenkomponenten, beispielsweise ein Ansaugmodul am Kraftstoffverteiler, montiert werden können.The overall functionality of the fuel distributor is further increased when integrally formed on the tubular body in one piece at least one, usually more coupling pieces for attachment of attachments. The coupling pieces can serve, for example, for receiving sleeves and screw connection means, via which further system components, for example an intake module, can be mounted on the fuel distributor.

Die Erfindung ist nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher beschrieben. Es zeigen:

Figur 1
einen erfindungsgemäßen Kraftstoffverteiler in einer perspektivischen Ansicht;
Figur 2
den Kraftstoffverteiler gemäß der Figur 1 montiert an einem technisch schematisiert dargestellten Zylinderkopf;
Figur 3
eine Seitenansicht auf die Darstellung des Kraftstoffverteilers entsprechend der Figur 2 und
Figur 4
einen vertikalen Querschnitt durch den Kraftstoffverteiler im Bereich einer Stütze.
The invention is described below with reference to an embodiment shown in the drawings. Show it:
FIG. 1
a fuel distributor according to the invention in a perspective view;
FIG. 2
the fuel distributor according to the FIG. 1 mounted on a cylinder head shown technically schematized;
FIG. 3
a side view of the representation of the fuel rail according to the FIG. 2 and
FIG. 4
a vertical cross section through the fuel rail in the region of a support.

Anhand der Figur 1 bis Figur 4 ist ein erfindungsgemäßer Kraftstoffverteiler 1 beschrieben.Based on FIG. 1 to FIG. 4 an inventive fuel distributor 1 is described.

Der Kraftstoffverteiler 1 gehört zum Speichereinspritzsystem eines Verbrennungsmotors. Die Druckerzeugung und die Kraftstoffeinspritzung sind bei solchen Speichereinspritzsystemen voneinander entkoppelt. Eine separate Hochdruckpumpe erzeugt kontinuierlich Druck. Dieser unabhängig von der Einspritzfolge aufgebaute Druck steht im Kraftstoffverteiler 1 permanent zur Verfügung.The fuel rail 1 belongs to the accumulator injection system of an internal combustion engine. The pressure generation and the fuel injection are decoupled from each other in such storage injection systems. A separate high-pressure pump continuously generates pressure. This pressure, which is built up independently of the injection sequence, is permanently available in the fuel distributor 1.

Der Kraftstoffverteiler 1 umfasst ein Druckspeicherrohr 2 mit einem pumpenseitigen Kraftstoffeinlass 3 und mehreren Injektoranschlüssen 4, 5. Der statisch komprimierte Kraftstoff wird im Druckspeicherrohr 2 gespeichert und über die Injektoranschlüsse 4, 5 verteilt den Injektoren einer Zylinderbank zur Verfügung gestellt.The fuel distributor 1 comprises a pressure accumulator tube 2 with a pump-side fuel inlet 3 and a plurality of injector ports 4, 5. The statically compressed fuel is stored in the pressure accumulator tube 2 and distributed through the injector ports 4, 5 the injectors of a cylinder bank available.

Das Druckspeicherrohr 2 weist einen geschmiedeten Rohrkörper 6 auf. Im Rohrkörper 6 ist mittels Tiefbohren ein Längshohlraum 7 eingebracht. Endseitig ist der Rohrkörper 6 mittels Stopfen 8 verschlossen. Materialeinheitlich schmiedetechnisch am Rohrkörper 6 angeformt ist weiterhin eine stutzenförmige Aufnahme 9 zur Montage eines Drucksensors. Auch der stutzenförmig ausgeführte Kraftstoffeinlass 3 ist materialeinheitlich einstückig schmiedetechnisch am Rohrkörper 6 angeformt. Nach der Herstellung des Schmiederohlings wird dieser mechanisch bearbeitet. Hierbei werden unter anderem die Anschlussöffnungen bzw. -bohrungen in den Injektoranschlüssen 4, 5, im Kraftstoffeinlass 3 sowie der Aufnahme 9 hergestellt.The pressure accumulator tube 2 has a forged tubular body 6. In the tubular body 6, a longitudinal cavity 7 is introduced by deep drilling. The end of the tubular body 6 is closed by means of plugs 8. Material unitarily forging technology is formed on the tubular body 6 is still a nozzle-shaped receptacle 9 for mounting a pressure sensor. Also, the nozzle-shaped running fuel inlet 3 is uniform material integrally formed forging technology on the tubular body 6. After the production of forging blank this is machined. Among other things, the connection openings or holes in the injector ports 4, 5, in the fuel inlet 3 and the receptacle 9 are produced.

Zur Festlegung bzw. Montage des Kraftstoffverteilers 1 am Zylinderkopf 10 eines Kraftfahrzeugs sind am Rohrkörper 6 materialeinheitlich einstückig Stützen 11 ausgeformt. Bei dem hier dargestellten Ausführungsbeispiel sind zwei Stützen 11 vorgesehen.For fixing or mounting of the fuel rail 1 on the cylinder head 10 of a motor vehicle 6 integral unitary supports 11 are formed on the tubular body 6. In the embodiment shown here two supports 11 are provided.

Die Stützen 11 sind gleichgerichtet zu den Injektoraufnahmen 4, 5 und in einer Linie fluchtend zu diesen in Längsrichtung LR des Rohrkörpers 6 angeordnet. Man erkennt, dass jeweils eine Stütze 11 zwischen zwei Injektoraufnahmen 4 bzw. 5 angeordnet ist. Bei der stirnseitigen Ansicht auf das Druckspeicherrohr 2, wie in den Figuren 3 und 4 dargestellt, decken sich die Längsachsen L1 der Stützen 11 und die Längsachsen L2 der Injektoraufnahmen 4, 5.The supports 11 are rectified to the Injektoraufnahmen 4, 5 and arranged in line with these in the longitudinal direction LR of the tubular body 6. It can be seen that in each case a support 11 is arranged between two injector receptacles 4 and 5 respectively. In the front view of the accumulator tube 2, as in the FIGS. 3 and 4 illustrated, the longitudinal axes L1 of the supports 11 and the longitudinal axes L2 of the Injektoraufnahmen 4, 5 coincide.

Die fluchtende und gleichgerichtete Anordnung von Stützen 11 und Injektoraufnahmen 4, 5 ermöglicht eine vorteilhafte schmiedetechnische Herstellung des Rohrkörpers 6. Stützen 11 und Injektoraufnahmen 4, 5 sind gemeinsam in der Trennebene des Schmiedewerkzeugs bzw. der Schmiedewerkzeughälften angeordnet und gleichgerichtet orientiert. Hierdurch wird der Gefahr von Werkzeugbruch oder Anrissen und Fältungen in den ausgeschmiedeten Stützen 11 entgegengewirkt.The aligned and rectified arrangement of supports 11 and injector 4, 5 allows an advantageous forging technology production of the tubular body 6. Supports 11 and injector 4, 5 are arranged together in the parting plane of the forging tool or the forging tool halves and oriented rectified. As a result, the risk of tool breakage or cracks and folds in the forged supports 11 is counteracted.

Jede Stütze 11 weist einen vom Rohrkörper 6 ausgehenden Schenkelabschnitt 12 und an ihrem zylinderkopfseitigen Ende 13 einen Flanschabschnitt 14 mit einem Durchgang 15 zur Durchführung einer Befestigungsschraube 16 auf. In den Stützen 11 bzw. im Schenkelabschnitt 12 der Stützen 11 ist jeweils eine sich in Längsrichtung der Stütze 11 erstreckende Ausnehmung 17 vorgesehen. Diese ist spanabhebend durch Fräsen in die Stützen 11 eingearbeitet.Each support 11 has a leg portion 12 extending from the tubular body 6 and, at its cylinder head end 13, a flange portion 14 with a passage 15 for the passage of a fastening screw 16. In the supports 11 and in the leg portion 12 of the supports 11 is in each case one in the longitudinal direction of the support 11 extending recess 17 is provided. This is machined by milling incorporated into the supports 11.

Der Flanschabschnitt 14 weist an seiner dem Zylinderkopf 10 abgewandten Seite eine Spannfläche 18 für die Schraubenköpfe 19 der Befestigungsschrauben 16 auf. Weiterhin weist der Flanschabschnitt 14 zylinderkopfseitig eine an die Außenkontur des Zylinderkopfs 10 angepasste Abstützfläche 20 auf. Mit der Abstützfläche 20 liegt der Flanschabschnitt 14 am Zylinderkopf 10 an.The flange portion 14 has on its side facing away from the cylinder head 10 a clamping surface 18 for the screw heads 19 of the mounting screws 16. Furthermore, the flange portion 14 has a cylinder head side adapted to the outer contour of the cylinder head 10 support surface 20. With the support surface 20 of the flange portion 14 abuts the cylinder head 10.

Zur Montage bzw. Festlegung des Kraftstoffverteilers 1 am Zylinderkopf 10 können kurze Befestigungsschrauben 16 eingesetzt werden. Hierdurch wird auch die Nachgiebigkeit an den Schrauben 16 und damit in der Schraubverbindung insgesamt verringert. Die Befestigungsschrauben 16 werden über die Ausnehmung 17 und die Durchgänge 15 in entsprechende Gewindebohrungen im Zylinderkopf 10 eingeschraubt. Hierbei gelangen die Schraubenköpfe 19 an der Spannfläche 18 des Flanschabschnitts 14 zur Anlage.For mounting or fixing the fuel rail 1 on the cylinder head 10 short mounting screws 16 can be used. As a result, the flexibility of the screws 16 and thus in the screw connection is also reduced overall. The fastening screws 16 are via the recess 17 and the passages 15 in corresponding threaded holes in the cylinder head 10th screwed. In this case, the screw heads 19 come to rest on the clamping surface 18 of the flange section 14.

Die Abstützfläche 20 des Flanschabschnitts 14 ist insbesondere schräg ausgeführt. Hierdurch kann die Fläche der Anlage zwischen Flanschabschnitt 14 und Zylinderkopf 10 vergrößert und damit die Flächenpressung reduziert werden. Die Außenkontur des Zylinderkopfs 10 ist im Anbindungsbereich des Kraftstoffverteilers entsprechend schräg geneigt.The support surface 20 of the flange portion 14 is particularly oblique. As a result, the area of the system between the flange portion 14 and the cylinder head 10 can be increased and thus the surface pressure can be reduced. The outer contour of the cylinder head 10 is inclined correspondingly obliquely in the connection region of the fuel rail.

Die sich in Längsrichtung einer Befestigungsschraube 16 erstreckende Verschraubungsachse L3 und die Längsachse L1 einer Stütze 11 verlaufen in einem Winkel α schräg zueinander. Weiterhin schneiden sich die Verschraubungsachse L3 und die Längsachse L1 der Stütze 11 in einem Schnittpunkt SP, wobei der Schnittpunkt SP in der Ebene der Abstützfläche 20 liegt. Die geometrische Konfiguration des Druckspeicherrohrs 2 ist ferner so ausgelegt, dass die Längsachsen L1 der Stützen 11 die Mittellängsachse MLA des Rohrkörpers 6 schneiden.The screw axis L3 extending in the longitudinal direction of a fastening screw 16 and the longitudinal axis L1 of a support 11 extend at an angle α at an angle to one another. Furthermore, the Verschraubungsachse L3 and the longitudinal axis L1 of the support 11 intersect at an intersection SP, the intersection point SP is in the plane of the support surface 20. The geometric configuration of the pressure accumulator tube 2 is further designed so that the longitudinal axes L1 of the supports 11 intersect the central longitudinal axis MLA of the tubular body 6.

Die Verschraubung bzw. Festlegung des Druckspeicherrohrs 2 am Zylinderkopf 10 über die Befestigungsschrauben 16 erfolgt über die Flanschabschnitte 14 der Stützen 11 unterhalb des Rohrkörpers 6. Die quer zur Mittellängsachse MLA des Rohrkörpers 6 gemessene Breite b1 einer Stütze 11 ist kleiner als der quer zur Längsachse L4 des Rohrkörpers 6 gemessene Durchmesser d1 des Rohrkörpers 6.The screw connection or fixing of the pressure accumulator tube 2 on the cylinder head 10 via the fastening screws 16 via the flange 14 of the supports 11 below the tubular body 6. The transverse to the central longitudinal axis MLA of the tubular body 6 measured width b1 of a support 11 is smaller than that transverse to the longitudinal axis L4 of the tubular body 6 measured diameter d1 of the tubular body. 6

Am Rohrkörper 6 sind weiterhin materialeinheitlich einstückig Koppelstücke 21 zur Befestigung von Anbauteilen ausgebildet. Die Koppelstücke 21 dienen zur Festlegung von Hülsen 22, wie in der Figur 2 zu erkennen. Durch die Hülsen 22 können Schraubverbindungsmittel 23 geführt werden, über welche weitere Anbaukomponenten am Kraftstoffverteiler 1 festgelegt werden können.On the tubular body 6 are further integrally formed integrally coupling pieces 21 for attachment of attachments. The coupling pieces 21 are used to define sleeves 22, as in the FIG. 2 to recognize. Through the sleeves 22 Schraubverbindungsmittel 23 can be performed, via which further attachment components can be set on the fuel rail 1.

Bezugszeichen:Reference numerals:

1 -1 -
KraftstoffverteilerFuel distributor
2 -2 -
DruckspeicherrohrAccumulator pipe
3 -3 -
KraftstoffeinlassFuel inlet
4 -4 -
Injektoranschlussinjector port
5 -5 -
Injektoranschlussinjector port
6 -6 -
Rohrkörperpipe body
7 -7 -
Längshohlraumlongitudinal cavity
8 -8th -
StopfenPlug
9 -9 -
Aufnahmeadmission
10 -10 -
Zylinderkopfcylinder head
11 -11 -
StützenSupport
12 -12 -
Schenkelabschnittleg portion
13 -13 -
EndeThe End
14 -14 -
Flanschabschnittflange
15 -15 -
Durchgangpassage
16 -16 -
Befestigungsschraubefixing screw
17 -17 -
Ausnehmungrecess
18 -18 -
Spannflächeclamping surface
19 -19 -
Schraubenkopfscrew head
20 -20 -
Abstützflächesupporting
21 -21 -
Koppelstückcoupling piece
22 -22 -
Hülseshell
23 -23 -
Schraubverbindungsmittelscrew fastening
b1 -b1 -
Breitewidth
d1 -d1 -
Durchmesserdiameter
L1 -L1 -
Längsachselongitudinal axis
L2 -L2 -
Längsachselongitudinal axis
L3 -L3 -
Verschraubungsachsescrewing axis
LR -LR -
Längsrichtunglongitudinal direction
MLA -MLA -
Mittellängsachsecentral longitudinal axis
SP -SP -
Schnittpunktintersection
α -α -
Winkelangle

Claims (11)

Kraftstoffverteiler, welcher ein Druckspeicherrohr (2) zur Aufnahme von unter Druck stehendem Kraftstoff aufweist, wobei das Druckspeicherrohr (2) einen geschmiedeten Rohrkörper (6) besitzt, an welchem materialeinheitlich einstückig stutzenförmige Injektoraufnahmen (4, 5) sowie Stützen (11) ausgeformt sind und das Druckspeicherrohr (2) über die Stützen (11) mittels Befestigungsschrauben (16) am Zylinderkopf (18) einer Brennkraftmaschine festlegbar ist, dadurch gekennzeichnet, dass die Stützen (11) fluchtend zu den Injektoraufnahmen (4, 5) am Rohrkörper (6) angeordnet sind.Fuel distributor, which has a pressure accumulator tube (2) for receiving pressurized fuel, wherein the pressure accumulator tube (2) has a forged tubular body (6) on which uniformly nozzle-shaped Injektoraufnahmen (4, 5) and supports (11) are formed and the pressure accumulator tube (2) via the supports (11) by means of fastening screws (16) on the cylinder head (18) of an internal combustion engine can be fixed, characterized in that the supports (11) in alignment with the Injektoraufnahmen (4, 5) on the tubular body (6) are. Kraftstoffverteiler nach Anspruch 1, dadurch gekennzeichnet, dass jede Stütze (11) einen vom Rohrkörper (6) ausgehenden Schenkelabschnitt (12) und an ihrem zylinderkopfseitigen Ende (13) einen Flanschabschnitt (14) mit einem Durchgang (15) zur Durchführung einer Befestigungsschraube (16) aufweist.Fuel distributor according to Claim 1, characterized in that each support (11) has a leg section (12) extending from the tubular body (6) and a flange section (14) having a passage (15) for passing through a fastening screw (16) at its cylinder head end (13) ) having. Kraftstoffverteiler nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Stütze (11), insbesondere in ihrem Schenkelabschnitt (12), eine sich in ihrer Längsrichtung erstreckende Ausnehmung (17) aufweist.Fuel distributor according to claim 1 or 2, characterized in that the support (11), in particular in its leg portion (12), has a recess (17) extending in its longitudinal direction. Kraftstoffverteiler nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Flanschabschnitt (14) an seiner dem Zylinderkopf (10) abgewandten Seite eine Spannfläche (18) für den Schraubenkopf (19) einer Befestigungsschraube (16) aufweist.Fuel distributor according to one of claims 1 to 3, characterized in that the flange portion (14) on its side facing away from the cylinder head (10) has a clamping surface (18) for the screw head (19) of a fastening screw (16). Kraftstoffverteiler nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Flanschabschnitt (14) eine an die Außenkontur des Zylinderkopfs (10) angepasste Abstützfläche (20) aufweist.Fuel distributor according to one of claims 1 to 4, characterized in that the flange portion (14) has a to the outer contour of the cylinder head (10) adapted supporting surface (20). Kraftstoffverteiler nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die sich in Längsrichtung einer Befestigungsschraube (16) erstreckende Verschraubungsachse (L3) und die Längsachse (L1) einer Stütze (11) in einem Winkel (α) schräg zueinander verlaufen.Fuel distributor according to one of claims 1 to 5, characterized in that extending in the longitudinal direction of a fastening screw (16) Verschraubungsachse (L3) and the longitudinal axis (L1) of a support (11) at an angle (α) obliquely to each other. Kraftstoffverteiler nach Anspruch 6, dadurch gekennzeichnet, dass sich die Verschraubungsachse (L3) und die Längsachse (L1) der Stütze (11) in einem Schnittpunkt (SP) schneiden und der Schnittpunkt (SP) in der Abstützfläche (20) liegt.Fuel distributor according to claim 6, characterized in that the Verschraubungsachse (L3) and the longitudinal axis (L1) of the support (11) intersect at an intersection (SP) and the intersection (SP) in the support surface (20). Kraftstoffverteiler nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Längsachse (L1) der Stütze (11) die Mittellängsachse (MLA) des Rohrkörpers (6) schneidet.Fuel distributor according to one of claims 1 to 7, characterized in that the longitudinal axis (L1) of the support (11) intersects the central longitudinal axis (MLA) of the tubular body (6). Kraftstoffverteiler nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die quer zur Mittellängsachse (MLA) des Rohrkörpers (6) gemessene Breite (b1) der Stütze (11) kleiner ist als der quer zur Mittellängsachse (MLA) des Rohrkörpers (6) gemessene Durchmesser (d1) des Rohrkörpers (6).Fuel distributor according to one of claims 1 to 8, characterized in that the transverse to the central longitudinal axis (MLA) of the tubular body (6) measured width (b1) of the support (11) is smaller than that transverse to the central longitudinal axis (MLA) of the tubular body (6). measured diameters (d1) of the tubular body (6). Kraftstoffverteiler nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass eine Stütze (11) in Längsrichtung (LR) des Rohrkörpers (6) zwischen zwei Injektoraufnahmen (4) bzw. (5) angeordnet ist.Fuel distributor according to one of claims 1 to 9, characterized in that a support (11) in the longitudinal direction (LR) of the tubular body (6) between two injector receptacles (4) and (5) is arranged. Kraftstoffverteiler nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass am Rohrkörper (6) materialeinheitlich einstückig zumindest ein Koppelstück (21) zur Befestigung eines Anbauteils ausgebildet ist.Fuel distributor according to one of claims 1 to 10, characterized in that the tube body (6) of the same material at least one coupling piece (21) is formed integrally for fixing an attachment.
EP16196928.2A 2015-11-09 2016-11-02 Fuel distributor Active EP3165760B1 (en)

Applications Claiming Priority (1)

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DE202015105989.2U DE202015105989U1 (en) 2015-11-09 2015-11-09 Fuel distributor

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EP3165760A1 true EP3165760A1 (en) 2017-05-10
EP3165760B1 EP3165760B1 (en) 2018-10-24

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CN (1) CN106677944B (en)
DE (1) DE202015105989U1 (en)

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DE102019123673B3 (en) * 2019-09-04 2020-12-10 Benteler Automobiltechnik Gmbh Fuel rail
DE102019120742B3 (en) * 2019-07-31 2021-02-04 Benteler Automobiltechnik Gmbh Fuel rail

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US10378499B2 (en) * 2016-12-09 2019-08-13 Caterpillar Inc. Common rail accumulator clamp
DE102018110342B4 (en) * 2018-04-30 2022-09-01 Benteler Automobiltechnik Gmbh Method of manufacturing a fuel rail
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CN106677944A (en) 2017-05-17
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US20170130686A1 (en) 2017-05-11
DE202015105989U1 (en) 2015-12-02

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