EP1888912B1 - Connection system - Google Patents

Connection system Download PDF

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Publication number
EP1888912B1
EP1888912B1 EP06721183A EP06721183A EP1888912B1 EP 1888912 B1 EP1888912 B1 EP 1888912B1 EP 06721183 A EP06721183 A EP 06721183A EP 06721183 A EP06721183 A EP 06721183A EP 1888912 B1 EP1888912 B1 EP 1888912B1
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EP
European Patent Office
Prior art keywords
connection system
hold
connection
fuel
inflow
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP06721183A
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German (de)
French (fr)
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EP1888912A1 (en
Inventor
Martin Scheffel
Andreas Eckbauer
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1888912A1 publication Critical patent/EP1888912A1/en
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Publication of EP1888912B1 publication Critical patent/EP1888912B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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

Definitions

  • the invention is based on a connection system for a fuel injection valve to be inserted into a receiving bore in a cylinder head according to the preamble of claim 1 (US Pat. U.S. Pat. No. 5,499,612 ).
  • a fastening device for fastening a fuel injection valve for direct injection of fuel into the combustion chamber of a Brennkraflmaschine comprising a hold-down, which is fitted on the fuel injection valve, wherein the hold-down is formed as a flat member and on a fuel injection valve engaging sleeve, the Tolerance compensation when installing the fuel injector serves, supported.
  • the hold-down is tightened by a corresponding tool so tight that the fuel injection valve is not pushed out by the pressure prevailing in the combustion chamber of the engine pressure from the cylinder head.
  • a disadvantage of the known fastening device is in particular the bracing effect of the clamping claw on the fuel injection valve.
  • the force flow generated in the fuel injection valve leads to deformations and thus to changes in the stroke of the valve needle to jamming and to a pressure or bending load of the housing parts, which are generally thin-walled and welded together at several points.
  • each fastening measure leads, for example by a support collar to increase the radial extent of the fuel injection valve and thus to an increased space requirement during installation.
  • the tolerance compensation between the injection valve and the fuel rail is realized by forcibly pulling the pipe to the desired position, causing deformation of the pipe.
  • the forces acting on the injection valve transverse forces are absorbed by the injection valve.
  • the high forces acting on the fuel injection valve can cause the fuel injection valve to be pressed into the receiving bore of the cylinder head so strongly that beads form and the fuel injection valve settles in these beads, which makes further tolerance compensation due to lack of mobility in the cylinder head more difficult.
  • connection system for a fuel injection valve to be inserted into a receiving bore in a cylinder head for connection to a fuel distributor line which comprises a connection to a pipeline leading to a fuel reservoir, with a connection part for connection to the pipeline and the characterizing features of the main claim has the Advantage that when installed on the fuel injection valve no excessive lateral forces act, damaging the valve.
  • the necessary tolerance compensation is carried out on the one hand on the connecting part to the pipe by the spherical end piece according to the invention can be before the tightening of the nut perpendicular to the plane in which the pipe is moving, and thus allows a transversal free installation.
  • a movement of the pipeline along its course caused by axial forces causes elastic or plastic deformation as soon as the pipeline can no longer absorb these axial forces along its course.
  • Fig. 1 shows a side view in a sectional view of a portion of a connection system 1 according to the invention, la for connecting a fuel distributor line 4 to a leading to a fuel reservoir not shown piping. 6
  • connection system 1, 1a for a fuel injection valve 2 to be inserted into a receiving bore in a cylinder head for connection to a fuel distributor line 4, which has a connection 5 to one to a fuel reservoir leading pipe 6, with a connecting part 7 for connection to the pipe 6 is characterized in that a hold down claw 8 at its first end 9 has an elongated opening 10 for receiving a connected to the inlet end of the fuel injection valve fitting 11 to the fuel rail 4 and that the connecting part 7 to the pipe 6 has a pipe fitting 12 with an end piece 13.
  • the end piece 13, which may be formed as a spherical rotary member is before tightening a union nut 23 perpendicular to the direction 37, in which the pipe 6 extends, movable, occurring manufacturing tolerances are compensated.
  • the pipe 6 is free of force with respect to the directions 35, 36 which are perpendicular to the direction 37, in which the pipe 6 extends, mounted on a flange 26 at the inlet end 24 of the fuel manifold 4.
  • the end piece 13 may be embodied in a further embodiment as a rotating part, which deviates from the full spherical symmetry and at its inflow end 29 an inlet-side spherical surface 31 and at its outlet end 30 has a drain-side spherical surface 32, wherein the radii 33, 34 of the inflow-side spherical surface 31 and the drain-side spherical surface 32 are different.
  • the combination of the two connection systems 1, 1a according to the invention causes the connection system 1, 1a to be free of lateral force, which means that the installed fuel injection valve 2 does not receive any forces due to the given manufacturing tolerances of the individual components.
  • Fig. 2 shows a plan view of a part of a connection system 1, 1a according to the invention.
  • a union nut 23, which is part of a necessary for the connection of a fuel rail 4 to a pipe 6 pipe fitting 12 is tightened after the manufacturing tolerances are compensated by the fact that the spherical end piece 13 is displaced so that the fuel injection valve 2 and the fuel rail 4 no Forces more perpendicular to the course of the not shown fuel reservoir leading pipe 6 receives.
  • the arrows 35 and 36 illustrate the directions in which the spherical end piece 13 can be moved for tolerance compensation before tightening the nut 23.
  • Fig. 3 shows a partial section of a portion of a connection system 1, 1a for connecting a fuel distributor line 4 to a not shown fuel reservoir leading pipe 6.
  • the necessary for pipe fitting 12 has a union nut 23, which forms the partially spherical end piece 13 in a cone-shaped Seat 25 presses.
  • the cone-shaped seat 25 limits the inlet-side end 24 of the fuel distributor line 4, which is formed in the form of a flange 26 which forms the inlet to the fuel distributor line 4.
  • the union nut 23, the end piece 13 and the cone-shaped seat 25, which is arranged at an inflow-side end 24 of the fuel distributor line 4, form a frictional connection.
  • Fig. 4 shows a partial section of a second embodiment of a portion of a connection system 1, 1A for connecting a fuel distribution line 4 to a leading to a fuel reservoir not shown pipe 6.
  • the inflow-side end 24 of the fuel distribution line 4 is formed in the form of a recess 27, in which the at least partially spherical end piece 13 is inserted and in which the end piece 13 for tolerance compensation along the directions 35 and 36 can be moved back and forth before it is fixed by means of a flat blank holder 28 which is placed around the terminal and the end piece 13 and with at least two screws 38, 39 is screwed into the fuel distributor line 4.
  • the screws 38, 39 are preferably arranged symmetrically to a longitudinal axis 40 of the recess 27. If the screws 38, 39 are tightened on the fuel distributor line 4, the end piece 13 is pressed onto the cone-shaped seat 25, which delimits the recess 27 of the inlet-side end 24 of the fuel distributor line 4.
  • Fig. 5 shows a side view of a hold down claw 8 in a perspective view, which is part of a connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2.
  • the hold-down claw 8 is a bent and stamped component made of sheet metal, which is screwed with at least one screw 41 on a not-shown end face of the cylinder head.
  • the holding-down claw 8 has an elongate opening 10 which completely encloses the inlet-side connecting piece 11 provided with an external thread 42 to the fuel distributor line 4. On the provided with the external thread 42 fitting 11 of the female thread 43 provided with a pipe connection 44 is placed and screwed.
  • the manufacturing tolerances in the direction 37 which is parallel to the course of the fuel reservoir leading to the pipe 6 by the fuel injection valve 2 is displaced in the elongated opening 10 of the hold down claw 8 by a small length along a longitudinal axis 18 of the elongated opening 10
  • This translational movement of the fuel injector 2 along the longitudinal axis 18 of the elongated opening 10 constitutes a rotational movement of the fuel injector 2 with respect to the cylinder head seal 45, causing the inventive port system 1, 1a transversely and non-restraint installation of the fuel injector 2 into one further illustrated receiving bore of the cylinder head allows.
  • Fig. 6 shows a plan view of a holding down claw 8, which is part of a connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2, wherein in this Fig. Side of the plug connection 21 for the electrical contacting is clear.
  • the hold-down claw 8 is fixed with a screw 41 on the cylinder head not shown.
  • the elongated opening 10 at a first end 9 of the hold-down clamp 8 fixes the inlet-side connecting piece 11 provided with an external thread 42, which is inserted into the fuel injection valve 2 for connection to the fuel distributor line 4.
  • the connection of the fuel injection valve 2 to the fuel rail 4 is made by fitting the pipe fitting 44 provided with an internal thread 43 with the tolerance compensation 48 in a direction parallel to the pipe joint 44 by shifting the fuel injection valve 2 to the fitting-side fitting 11 and screwing it becomes.
  • the diameter of the elongated opening formed by a partial circle 14 and two secants 15 10 perpendicular to a longitudinal axis 18 of the hold-down claw 8 extending corresponds to the spanner size 49 of the wrench to be applied for screwing. This diameter corresponds to the distance between the parallel secants 15, which run parallel to the longitudinal axis 18 of the hold-down claw 8.
  • a further embodiment of the elongate opening 10 extends to a partial ellipse and two secants running parallel to their large semiaxis.
  • the partial ellipse and the Both secants define the circumference 17 of the elongated opening 10 with the major half axis and the longitudinal axis 18 of the hold down claw 8 coinciding.
  • a second end 20 of the hold-down claw 8 rests on a not-shown end face of the cylinder head, wherein at the second end 20 of the hold-down claw 8 at least one opening 22 is provided, which receives the screw 41, the second end 20 of the hold down claw 8 at the Not shown end face of the cylinder head fixed.
  • Fig. 7 shows a partial view of a hold-8 with fuel injector 2 in a perspective view
  • the hold-8 is part of the connection system 1, la according to the invention for the connection of a fuel distributor line 4 to a fuel injection valve 2.
  • the plug connection 21 can be seen, which enables electrical contacting of the fuel injection valve 2.
  • the pipe connection 44 is placed on the inserted into the fuel injection valve 2, inlet side, tubular fitting 11 and not yet screwed completely, so that the fuel injection valve 2 in the provided in the hold 8 elongated opening 10 to compensate for manufacturing tolerances parallel to the longitudinal axis 18 of the hold 8th can be moved.
  • Fig. 8 shows a perspective view of an overall view of a hold-8 with fuel injector 2, which is part of a connection system 1, la according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2.
  • the pipe connection 44 is placed and screwed onto the inserted into the fuel injector 2 tubular fitting 11 after the fuel injection valve 2 has been moved in the elongated opening 10 to compensate for manufacturing tolerances parallel to the longitudinal axis 18 of the hold 8.
  • Fig. 9 shows a perspective view of a partial view of a hold-8 with fuel injector 2, which is part of the connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2.
  • the elongated opening 10 in the holding-down claw 8 surrounds the tubular, provided with an external thread 42 inlet-side fitting 11, which in the inlet end of the Fuel injection valve 2 is inserted.
  • At a second end 20 of the hold down claw 8 there is at least one opening for receiving a screw 41, which fixes the hold-down claw 8 with its second end 20 on a non-illustrated end face of the cylinder head.
  • Fig. 10 shows an overall view of an inlet-side, tubular fitting 11, which connects the fuel injection valve 2 to the fuel rail 4.
  • the tubular inlet-side fitting 11 is provided at its upstream end with an external thread 42 and is inserted with its downstream end in the inflow-side end of the fuel injection valve 2, after a ring 46 whose diameter is dimensioned so that it over the external thread 42 of the tubular , inflow-side connecting piece 11 can be pushed, is welded below the external thread 42.
  • Fig. 11 shows a section through a to be screwed to the tubular, inlet-side connector 11 pipe connection 44 to the fuel rail 4.
  • the pipe connection 44 has an internal thread 43 and is inserted with its outlet end to the tubular inlet-side connector 11 and screwed.
  • the inlet-side end 47 of the pipe connection 44 leads to the fuel distributor line 4.

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

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Anschluss-System für ein in eine Aufnahmebohrung in einen Zylinderkopf einzusetzendes Brennstoffeinspritzventil nach der Gattung des Anspruchs 1 ( US-A-5 499 612 ).The invention is based on a connection system for a fuel injection valve to be inserted into a receiving bore in a cylinder head according to the preamble of claim 1 (US Pat. U.S. Pat. No. 5,499,612 ).

Aus der Druckschrift DE 101 12 665 A1 ist eine Befestigungsvorrichtung zur Befestigung eines Brennstoffeinspritzventils zum direkten Einspritzen von Brennstoff in den Brennraum einer Brennkraflmaschine bekannt, die einen Niederhalter umfasst, der auf das Brennstoffeinspritzventil aufgesteckt ist, wobei der Niederhalter als flaches Bauteil ausgebildet ist und sich an einer das Brennstoffeinspritzventil umgreifenden Hülse, die zum Toleranzausgleich beim Einbau des Brennstoffeinspritzventils dient, abstützt. Der Niederhalter wird mittels eines entsprechenden Werkzeugs so fest angezogen, dass das Brennstoffeinspritzventil nicht durch den im Brennraum der Brennkraftmaschine herrschenden Druck aus dem Zylinderkopf herausgedrückt wird.From the publication DE 101 12 665 A1 a fastening device for fastening a fuel injection valve for direct injection of fuel into the combustion chamber of a Brennkraflmaschine is known, comprising a hold-down, which is fitted on the fuel injection valve, wherein the hold-down is formed as a flat member and on a fuel injection valve engaging sleeve, the Tolerance compensation when installing the fuel injector serves, supported. The hold-down is tightened by a corresponding tool so tight that the fuel injection valve is not pushed out by the pressure prevailing in the combustion chamber of the engine pressure from the cylinder head.

Nachteilig an der bekannten Befestigungsvorrichtung ist insbesondere die verspannende Wirkung der Spannpratze auf das Brennstoffeinspritzventil. Der im Brennstoffeinspritzventil erzeugte Kraftfluss führt zu Verformungen und somit zu Hubänderungen der Ventilnadel bis zum Verklemmen sowie zu einer Druck- oder Biegebelastung der Gehäuseteile, die im allgemeinen dünnwandig sind und an mehreren Stellen miteinander verschweißt sind. Zudem führt jede Befestigungsmaßnahme beispielsweise durch einen Auflagebund zu einer Vergrößerung der radialen Ausdehnung des Brennstoffeinspritzventils und damit zu einem erhöhten Platzbedarf beim Einbau.A disadvantage of the known fastening device is in particular the bracing effect of the clamping claw on the fuel injection valve. The force flow generated in the fuel injection valve leads to deformations and thus to changes in the stroke of the valve needle to jamming and to a pressure or bending load of the housing parts, which are generally thin-walled and welded together at several points. In addition, each fastening measure leads, for example by a support collar to increase the radial extent of the fuel injection valve and thus to an increased space requirement during installation.

Der Toleranzausgleich zwischen dem Einspritzventil und der Brennstoffverteilerleitung wird dadurch realisiert, dass die Rohrleitung gewaltsam auf die gewünschte Position gezogen wird, was eine Verformung der Rohrleitung bewirkt. Die dabei auf das Einspritzventil wirkenden Querkräfte werden von dem Einspritzventil aufgenommen. Des weiteren können die hohen auf das Brennstoffeinspritzventil einwirkenden Kräfte bewirken, dass das Brennstoffeinspritzventil so stark in die Aufnahmebohrung des Zylinderkopfes gedrückt wird, dass sich Sicken bilden und das Brennstoffeinspritzventil sich in diesen Sicken festsetzt, was einen weiteren Toleranzausgleich aufgrund von mangelnder Beweglichkeit im Zylinderkopf erschwert.The tolerance compensation between the injection valve and the fuel rail is realized by forcibly pulling the pipe to the desired position, causing deformation of the pipe. The forces acting on the injection valve transverse forces are absorbed by the injection valve. Furthermore, the high forces acting on the fuel injection valve can cause the fuel injection valve to be pressed into the receiving bore of the cylinder head so strongly that beads form and the fuel injection valve settles in these beads, which makes further tolerance compensation due to lack of mobility in the cylinder head more difficult.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Anschluss-System für ein in eine Aufnahmebohrung in einen Zylinderkopf einzusetzendes Brennstoffeinspritzventil zum Anschluss an eine Brennstoffverteilerleitung, die einen Anschluss zu einer zu einem Brennstoffreservoir führenden Rohrleitung umfasst, mit einem Verbindungsteil zur Verbindung mit der Rohrleitung und den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, dass beim Einbau auf das Brennstoffeinspritzventil keine übermäßigen Querkräfte wirken, die das Ventil schädigen.The connection system according to the invention for a fuel injection valve to be inserted into a receiving bore in a cylinder head for connection to a fuel distributor line which comprises a connection to a pipeline leading to a fuel reservoir, with a connection part for connection to the pipeline and the characterizing features of the main claim has the Advantage that when installed on the fuel injection valve no excessive lateral forces act, damaging the valve.

Der dafür notwendige Toleranzausgleich wird zum einen am Verbindungsteil zur Rohrleitung ausgeführt, indem das erfindungsgemäße kugelförmige Endstück sich vor dem Festziehen der Überwurfmutter senkrecht zur Ebene, in der sich die Rohrleitung befindet, bewegen lässt und somit einen querkräftefreien Einbau ermöglicht. Eine durch Axialkräfte verursachte Bewegung der Rohrleitung entlang ihres Verlaufes bewirkt eine elastische oder plastische Verformung, sobald die Rohrleitung diese Axialkräfte entlang ihres Verlaufes nicht mehr aufnehmen kann.The necessary tolerance compensation is carried out on the one hand on the connecting part to the pipe by the spherical end piece according to the invention can be before the tightening of the nut perpendicular to the plane in which the pipe is moving, and thus allows a transversal free installation. A movement of the pipeline along its course caused by axial forces causes elastic or plastic deformation as soon as the pipeline can no longer absorb these axial forces along its course.

Der Ausgleich dieser Kräfte erfolgt an der erfindungsgemäßen länglichen, als Führung dienenden Öffnung der Niederhaltepratze. Das in axialer Richtung der Aufnahmebohrung des Zylinderkopfes fixierte Brennstoffeinspritzventil kann in dieser als Führung dienenden Öffnung um eine kleine Auslenkung hin und her bewegt werden, was eine Drehbewegung um eine Zylinderkopfabdichtung als Fixpunkt darstellt. Somit ist sichergestellt, dass ein Toleranzausgleich in allen Ebenen möglich ist, und zwar in der Art, dass auf das Brennstoffeinspritzventil keine Quer- oder Längskräfte wirken, die durch Fertigungstoleranzen beim Einbau entstehen können. Dafür muss die Beweglichkeit der Rohrleitung in den Anschlussbereichen ebenfalls gegeben sein, was durch das erfindungsgemäße Anschluss-System für ein Brennstoffeinspritzventil an eine Brennstoffverteilerleitung gewährleistet wirdThe compensation of these forces takes place on the inventive elongated, serving as a guide opening of the holddown claw. The fuel injection valve fixed in the axial direction of the receiving bore of the cylinder head can be moved back and forth in this opening serving as a guide by a small deflection, which represents a rotational movement about a cylinder head seal as a fixed point. This ensures that a tolerance compensation in all levels is possible, in such a way that the fuel injector no transverse or longitudinal forces act, which can be caused by manufacturing tolerances during installation. For the mobility of the pipe in the connection areas must also be given, which is ensured by the inventive connection system for a fuel injection valve to a fuel distribution line

Die Unteransprüche ermöglichen vorteilhafte Weiterbildungen der Erfindung.The dependent claims allow advantageous developments of the invention.

Zeichnungdrawing

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

Fig. 1
eine Seitenansicht in Schnittdarstellung eines Teils eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an eine zu einem Brennstoffreservoir führende Rohrleitung;
Fig. 2
eine Draufsicht auf ein Teil eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an eine zu einem Brennstoffreservoir führende Rohrleitung;
Fig. 3
einen Teilschnitt eines Teils eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an eine zu einem Brennstoffreservoir führende Rohrleitung;
Fig. 4
einen Teilschnitt eines zweiten Ausführungsbeispiels eines Teils eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an eine zu einem Brennstoffreservoir führende Rohrleitung;
Fig. 5
eine Seitenansicht einer Niederhaltepratze, die Teil eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an ein Brennstoffeinspritzventil ist;
Fig. 6
eine Draufsicht auf eine Niederhaltepratze, die Teil eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an ein Brennstoffeinspritzventil ist;
Fig. 7
eine Teilansicht einer Niederhaltepratze mit Brennstoffeinspritzventil, die Teil eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an ein Brennstoffeinspritzventil ist;
Fig. 8
eine Gesamtansicht einer Niederhaltepratze mit Brennstoffeinspritzventil, die Teil eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an ein Brennstoffeinspritzventil ist;
Fig. 9
eine Teilansicht einer Niederhaltepratze mit Brennstoffeinspritzventil, die Teil eines erfindungsgemäßen Anschluss-Systems zum Anschluss einer Brennstoffverteilerleitung an ein Brennstoffeinspritzventil ist;
Fig. 10
eine Gesamtansicht eines Anschlussstücks zum Anschluss eines Brennstoffeinspritzventils an eine Brennstoffverteilerleitung und
Fig. 11
einen Schnitt durch einen mit dem Anschlussstück zu verschraubenden Rohranschluss zur Brennstoffverteilerleitung.
Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Fig. 1
a side view in a sectional view of a portion of a connection system according to the invention for connecting a fuel distribution line to a pipe leading to a fuel reservoir pipe;
Fig. 2
a plan view of a portion of a connection system according to the invention for connecting a fuel distribution line to a pipe leading to a fuel reservoir pipe;
Fig. 3
a partial section of a portion of a connection system according to the invention for connecting a fuel distribution line to a leading to a fuel reservoir pipe;
Fig. 4
a partial section of a second embodiment of a portion of a connection system according to the invention for connecting a fuel distribution line to a leading to a fuel reservoir pipe;
Fig. 5
a side view of a hold-down claw, which is part of a connection system according to the invention for connecting a fuel distribution line to a fuel injection valve;
Fig. 6
a plan view of a hold-down claw, which is part of a connection system according to the invention for connecting a fuel distribution line to a fuel injection valve;
Fig. 7
a partial view of a hold-down spray with fuel injection valve, which is part of a connection system according to the invention for connecting a fuel distribution line to a fuel injection valve;
Fig. 8
an overall view of a hold-down sprayer with fuel injection valve, which is part of a connection system according to the invention for connecting a fuel distributor line to a fuel injection valve;
Fig. 9
a partial view of a hold-down spray with fuel injection valve, which is part of a connection system according to the invention for connecting a fuel distribution line to a fuel injection valve;
Fig. 10
an overall view of a connector for connecting a fuel injection valve to a fuel rail and
Fig. 11
a section through a to be screwed with the fitting pipe connection to the fuel rail.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Fig. 1 zeigt eine Seitenansicht in Schnittdarstellung eines Teils eines erfindungsgemäßen Anschluss-Systems 1, la zum Anschluss einer Brennstoffverteilerleitung 4 an eine zu einem nicht weiter dargestellten Brennstoffreservoir führende Rohrleitung 6. Fig. 1 shows a side view in a sectional view of a portion of a connection system 1 according to the invention, la for connecting a fuel distributor line 4 to a leading to a fuel reservoir not shown piping. 6

Das erfindungsgemäße Anschluss-System 1, 1a für ein in eine Aufnahmebohrung in einem Zylinderkopf einzusetzendes Brennstoffeinspritzventil 2 zum Anschluss an eine Brennstoffverteilerleitung 4, die einen Anschluss 5 zu einer zu einem Brennstoffreservoir führenden Rohrleitung 6 umfasst, mit einem Verbindungsteil 7 zur Verbindung mit der Rohrleitung 6 ist dadurch gekennzeichnet, dass eine Niederhaltepratze 8 an ihrem ersten Ende 9 eine längliche Öffnung 10 zur Aufnahme eines mit dem zulaufseitigen Ende des Brennstoffeinspritzventil verbundenen Anschlussstückes 11 zur Brennstoffverteilerleitung 4 aufweist und dass das Verbindungsteil 7 zur Rohrleitung 6 eine Rohrverschraubung 12 mit einem Endstück 13 aufweist.The connection system 1, 1a according to the invention for a fuel injection valve 2 to be inserted into a receiving bore in a cylinder head for connection to a fuel distributor line 4, which has a connection 5 to one to a fuel reservoir leading pipe 6, with a connecting part 7 for connection to the pipe 6 is characterized in that a hold down claw 8 at its first end 9 has an elongated opening 10 for receiving a connected to the inlet end of the fuel injection valve fitting 11 to the fuel rail 4 and that the connecting part 7 to the pipe 6 has a pipe fitting 12 with an end piece 13.

Das Endstück 13, das als kugelförmiges Drehteil ausgebildet sein kann, ist vor dem Festziehen einer Überwurfmutter 23 senkrecht zu der Richtung 37, in der die Rohrleitung 6 verläuft, beweglich, wobei auftretende Fertigungstoleranzen ausgeglichen werden. Dabei ist die Rohrleitung 6 kräftefrei bezüglich der Richtungen 35, 36, die senkrecht sind zur Richtung 37, in der die Rohrleitung 6 verläuft, an einen Flansch 26 am zulaufseitigen Ende 24 der Brennstoffverteilerleitung 4 montiert. Das Endstück 13 kann in einem weiteren Ausführungsbeispiel als Drehteil ausgeführt sein, das von der vollständigen Kugelsymmetrie abweicht und an seinem zulaufseitigen Ende 29 eine zulaufseitige Kugelfläche 31 und an seinem ablaufseitigen Ende 30 eine ablaufseitige Kugelfläche 32 aufweist, wobei die Radien 33, 34 der zulaufseitigen Kugelfläche 31 und der ablaufseitigen Kugelfläche 32 unterschiedlich sind. Die Kombination der beiden erfindungsgemäßen Anschluss-Systeme 1, 1a bewirkt, dass das Anschluss-System 1, 1a querkraftfrei ist, was bedeutet, dass das eingebaute Brennstoffeinspritzventil 2 keine Kräfte aufgrund der gegebenen Fertigungstoleranzen der einzelnen Bauteile aufnimmt.The end piece 13, which may be formed as a spherical rotary member is before tightening a union nut 23 perpendicular to the direction 37, in which the pipe 6 extends, movable, occurring manufacturing tolerances are compensated. In this case, the pipe 6 is free of force with respect to the directions 35, 36 which are perpendicular to the direction 37, in which the pipe 6 extends, mounted on a flange 26 at the inlet end 24 of the fuel manifold 4. The end piece 13 may be embodied in a further embodiment as a rotating part, which deviates from the full spherical symmetry and at its inflow end 29 an inlet-side spherical surface 31 and at its outlet end 30 has a drain-side spherical surface 32, wherein the radii 33, 34 of the inflow-side spherical surface 31 and the drain-side spherical surface 32 are different. The combination of the two connection systems 1, 1a according to the invention causes the connection system 1, 1a to be free of lateral force, which means that the installed fuel injection valve 2 does not receive any forces due to the given manufacturing tolerances of the individual components.

Fig. 2 zeigt eine Draufsicht auf ein Teil eines erfindungsgemäßen Anschluss-Systems 1, 1a. Eine Überwurfmutter 23, die Bestandteil einer für den Anschluss einer Brennstoffverteilerleitung 4 an eine Rohrleitung 6 notwendigen Rohrverschraubung 12 ist, wird festgezogen, nachdem die Fertigungstoleranzen dadurch ausgeglichen sind, dass das kugelförmige Endstück 13 so verschoben wird, dass das Brennstoffeinspritzventil 2 und die Brennstoffverteilerleitung 4 keine Kräfte mehr senkrecht zum Verlauf der zum nicht weiter dargestellten Brennstoffreservoir führenden Rohrleitung 6 aufnimmt. Die Pfeile 35 und 36 verdeutlichen die Richtungen, in die das kugelförmige Endstück 13 zum Toleranzausgleich vor dem Festziehen der Überwurfmutter 23 bewegt werden kann. Fig. 2 shows a plan view of a part of a connection system 1, 1a according to the invention. A union nut 23, which is part of a necessary for the connection of a fuel rail 4 to a pipe 6 pipe fitting 12 is tightened after the manufacturing tolerances are compensated by the fact that the spherical end piece 13 is displaced so that the fuel injection valve 2 and the fuel rail 4 no Forces more perpendicular to the course of the not shown fuel reservoir leading pipe 6 receives. The arrows 35 and 36 illustrate the directions in which the spherical end piece 13 can be moved for tolerance compensation before tightening the nut 23.

Fig. 3 zeigt einen Teilschnitt eines Teils eines Anschluss-Systems 1, 1a zum Anschluss einer Brennstoffverteilerleitung 4 an eine zu einem nicht weiter dargestellten Brennstoffreservoir führende Rohrleitung 6. Die dafür nötige Rohrverschraubung 12 weist eine Überwurfmutter 23 auf, die das teilweise kugelförmig ausgebildete Endstück 13 in einen konusförmigen Sitz 25 drückt. Der konusförmige Sitz 25 begrenzt das zulaufseitige Ende 24 der Brennstoffverteilerleitung 4, das in Form eines Flansches 26 ausgebildet ist, der den Zulauf zur Brennstoffverteilerleitung 4 bildet. Die Überwurfmutter 23, das Endstück 13 und der konusförmige Sitz 25, der an einem zulaufseitigen Ende 24 der Brennstoffverteilerleitung 4 angeordnet ist, bilden eine kraftschlüssige Verbindung. Fig. 3 shows a partial section of a portion of a connection system 1, 1a for connecting a fuel distributor line 4 to a not shown fuel reservoir leading pipe 6. The necessary for pipe fitting 12 has a union nut 23, which forms the partially spherical end piece 13 in a cone-shaped Seat 25 presses. The cone-shaped seat 25 limits the inlet-side end 24 of the fuel distributor line 4, which is formed in the form of a flange 26 which forms the inlet to the fuel distributor line 4. The union nut 23, the end piece 13 and the cone-shaped seat 25, which is arranged at an inflow-side end 24 of the fuel distributor line 4, form a frictional connection.

Fig. 4 zeigt einen Teilschnitt eines zweiten Ausführungsbeispiels eines Teils eines Anschluss-Systems 1, 1A zum Anschluss einer Brennstoffverteilerleitung 4 an eine zu einem nicht weiter dargestellten Brennstoffreservoir führende Rohrleitung 6. Das zulaufseitige Ende 24 der Brennstoffverteilerleitung 4 ist in Form einer Ausnehmung 27 ausgebildet, in die das zumindest teilweise kugelförmige Endstück 13 eingelegt wird und in der das Endstück 13 zum Toleranzausgleich entlang der Richtungen 35 und 36 hin und her bewegt werden kann, bevor es mittels eines flachen Niederhalters 28 fixiert wird, der um den Anschluss und das Endstück 13 gelegt wird und mit zumindest zwei Schrauben 38, 39 in die Brennstoffverteilerleitung 4 eingeschraubt wird. Die Schrauben 38, 39 sind vorzugsweise symmetrisch zu einer Längsachse 40 der Ausnehmung 27 angeordnet. Werden die Schrauben 38, 39 an der Brennstoffverteilerleitung 4 angezogen, so wird das Endstück 13 auf den konusförmigen Sitz 25 gepresst, der die Ausnehmung 27 des zulaufseitigen Ende 24 der Brennstoffverteilerleitung 4 begrenzt. Fig. 4 shows a partial section of a second embodiment of a portion of a connection system 1, 1A for connecting a fuel distribution line 4 to a leading to a fuel reservoir not shown pipe 6. The inflow-side end 24 of the fuel distribution line 4 is formed in the form of a recess 27, in which the at least partially spherical end piece 13 is inserted and in which the end piece 13 for tolerance compensation along the directions 35 and 36 can be moved back and forth before it is fixed by means of a flat blank holder 28 which is placed around the terminal and the end piece 13 and with at least two screws 38, 39 is screwed into the fuel distributor line 4. The screws 38, 39 are preferably arranged symmetrically to a longitudinal axis 40 of the recess 27. If the screws 38, 39 are tightened on the fuel distributor line 4, the end piece 13 is pressed onto the cone-shaped seat 25, which delimits the recess 27 of the inlet-side end 24 of the fuel distributor line 4.

Fig. 5 zeigt eine Seitenansicht einer Niederhaltepratze 8 in perspektivischer Darstellung, die Teil eines erfindungsgemäßen Anschluss-Systems 1, 1a zum Anschluss einer Brennstoffverteilerleitung 4 an ein Brennstoffeinspritzventil 2 ist. Die Niederhaltepratze 8 ist ein aufgebogenes und gestanztes Bauteil aus Blech, das mit zumindest einer Schraube 41 an einer nicht weiter dargestellten Stirnseite des Zylinderkopfes festgeschraubt ist. Die Niederhaltepratze 8 weist eine längliche Öffnung 10 auf, die das mit einem Außengewinde 42 versehene zulaufseitige Anschlussstück 11 zur Brennstoffverteilerleitung 4 vollständig umfasst. Auf das mit dem Außengewinde 42 versehene Anschlussstück 11 wird der mit einem Innengewinde 43 versehene Rohranschluss 44 aufgesetzt und verschraubt. Bevor der Rohranschluss 44 verschraubt wird, werden die Fertigungstoleranzen in der Richtung 37 ausgeglichen, die parallel zum Verlauf der zum Brennstoffreservoir führenden Rohrleitung 6 liegt, indem das Brennstoffeinspritzventil 2 in der länglichen Öffnung 10 der Niederhaltepratze 8 um eine kleine Länge, entlang einer Längsachse 18 der länglichen Öffnung 10 verschoben wird Diese translatorische Bewegung des Brennstoffeinspritzventils 2 entlang der Längsachse 18 der länglichen Öffnung 10 stellt eine Drehbewegung des Brennstoffeinspritzventils 2 bezüglich der Zylinderkopfabdichtung 45 dar, was bewirkt, dass das erfindungsgemäße Anschluss-System 1, 1a einen quer- und längskraftfreien Einbau des Brennstoffeinspritzventils 2 in eine nicht weiter dargestellte Aufnahmebohrung des Zylinderkopfes ermöglicht. Fig. 5 shows a side view of a hold down claw 8 in a perspective view, which is part of a connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2. The hold-down claw 8 is a bent and stamped component made of sheet metal, which is screwed with at least one screw 41 on a not-shown end face of the cylinder head. The holding-down claw 8 has an elongate opening 10 which completely encloses the inlet-side connecting piece 11 provided with an external thread 42 to the fuel distributor line 4. On the provided with the external thread 42 fitting 11 of the female thread 43 provided with a pipe connection 44 is placed and screwed. Before the pipe connection 44 screwed is compensated, the manufacturing tolerances in the direction 37, which is parallel to the course of the fuel reservoir leading to the pipe 6 by the fuel injection valve 2 is displaced in the elongated opening 10 of the hold down claw 8 by a small length along a longitudinal axis 18 of the elongated opening 10 This translational movement of the fuel injector 2 along the longitudinal axis 18 of the elongated opening 10 constitutes a rotational movement of the fuel injector 2 with respect to the cylinder head seal 45, causing the inventive port system 1, 1a transversely and non-restraint installation of the fuel injector 2 into one further illustrated receiving bore of the cylinder head allows.

Fig. 6 zeigt eine Draufsicht auf eine Niederhaltepratze 8, die Teil eines erfindungsgemäßen Anschluss-Systems 1, 1a zum Anschluss einer Brennstoffverteilerleitung 4 an ein Brennstoffeinspritzventil 2 ist, wobei in dieser Fig. seitlich der Steckanschluss 21 für die elektrische Kontaktierung deutlich wird. Die Niederhaltepratze 8 ist mit einer Schraube 41 am nicht weiter dargestellten Zylinderkopf fixiert. Die längliche Öffnung 10 an einem ersten Ende 9 der Niederhaltepratze 8 fixiert das mit einem Außengewinde 42 versehene zulaufseitige Anschlussstück 11, das in das Brennstoffeinspritzventil 2 zum Anschluss an die Brennstoffverteilerleitung 4 gesteckt wird. Fig. 6 shows a plan view of a holding down claw 8, which is part of a connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2, wherein in this Fig. Side of the plug connection 21 for the electrical contacting is clear. The hold-down claw 8 is fixed with a screw 41 on the cylinder head not shown. The elongated opening 10 at a first end 9 of the hold-down clamp 8 fixes the inlet-side connecting piece 11 provided with an external thread 42, which is inserted into the fuel injection valve 2 for connection to the fuel distributor line 4.

Der Anschluss des Brennstoffeinspritzventils 2 zur Brennstoffverteilerleitung 4 wird dadurch hergestellt, dass der mit einem Innengewinde 43 versehene Rohranschluss 44, nachdem der Toleranzausgleich 48 in einer zum Rohranschluss 44 parallelen Richtung 37 durch Verschieben des Brennstoffeinspritzventils 2 durchgeführt wurde, auf das zulaufseitige Anschlussstück 11 aufgesteckt und verschraubt wird. Der Durchmesser der länglichen von einem Teilkreis 14 und zwei Sekanten 15 gebildeten Öffnung 10 senkrecht zu einer Längsachse 18 der Niederhaltepratze 8 verlaufend entspricht der Schlüsselweite 49 des zum Verschrauben anzusetzenden Schraubenschlüssels. Dieser Durchmesser entspricht dem Abstand der parallel verlaufenden Sekanten 15, die parallel zur Längsachse 18 der Niederhaltepratze 8 verlaufen.The connection of the fuel injection valve 2 to the fuel rail 4 is made by fitting the pipe fitting 44 provided with an internal thread 43 with the tolerance compensation 48 in a direction parallel to the pipe joint 44 by shifting the fuel injection valve 2 to the fitting-side fitting 11 and screwing it becomes. The diameter of the elongated opening formed by a partial circle 14 and two secants 15 10 perpendicular to a longitudinal axis 18 of the hold-down claw 8 extending corresponds to the spanner size 49 of the wrench to be applied for screwing. This diameter corresponds to the distance between the parallel secants 15, which run parallel to the longitudinal axis 18 of the hold-down claw 8.

Ein weiteres Ausführungsbeispiel der länglichen Öffnung 10 erstreckt sich auf eine Teilellipse und zwei parallel zu ihrer großen Halbachse verlaufenden Sekanten. Die Teilellipse und die beiden Sekanten definieren den Umfang 17 der länglichen Öffnung 10, wobei die große Halbachse und die Längsachse 18 der Niederhaltepratze 8 zusammenfallen.A further embodiment of the elongate opening 10 extends to a partial ellipse and two secants running parallel to their large semiaxis. The partial ellipse and the Both secants define the circumference 17 of the elongated opening 10 with the major half axis and the longitudinal axis 18 of the hold down claw 8 coinciding.

Ein zweites Ende 20 der Niederhaltepratze 8 liegt auf einer nicht weiter dargestellten Stirnseite des Zylinderkopfes auf, wobei an dem zweiten Ende 20 der Niederhaltepratze 8 zumindest eine Öffnung 22 vorgesehen ist, die die Schraube 41 aufnimmt, die das zweite Ende 20 der Niederhaltepratze 8 an der nicht weiter dargestellten Stirnseite des Zylinderkopfes fixiert.A second end 20 of the hold-down claw 8 rests on a not-shown end face of the cylinder head, wherein at the second end 20 of the hold-down claw 8 at least one opening 22 is provided, which receives the screw 41, the second end 20 of the hold down claw 8 at the Not shown end face of the cylinder head fixed.

Fig. 7 zeigt eine Teilansicht einer Niederhaltepratze 8 mit Brennstoffeinspritzventil 2 in perspektivischer Darstellung, wobei die Niederhaltepratze 8 Teil des erfindungsgemäßen Anschluss-Systems 1, la zum Anschluss einer Brennstoffverteilerleitung 4 an ein Brennstoffeinspritzventil 2 ist. Im Vordergrund ist der Steckanschluss 21 zu sehen, der eine elektrische Kontaktierung des Brennstoffeinspritzventils 2 ermöglicht. Der Rohranschluss 44 ist auf das in das Brennstoffeinspritzventil 2 eingeschobene, zulaufseitige, rohrförmige Anschlussstück 11 aufgesetzt und noch nicht ganz festgeschraubt, so dass das Brennstoffeinspritzventil 2 in der in der Niederhaltepratze 8 vorgesehenen länglichen Öffnung 10 zum Ausgleich der Fertigungstoleranzen parallel zur Längsachse 18 der Niederhaltepratze 8 verschoben werden kann. Fig. 7 shows a partial view of a hold-8 with fuel injector 2 in a perspective view, the hold-8 is part of the connection system 1, la according to the invention for the connection of a fuel distributor line 4 to a fuel injection valve 2. In the foreground, the plug connection 21 can be seen, which enables electrical contacting of the fuel injection valve 2. The pipe connection 44 is placed on the inserted into the fuel injection valve 2, inlet side, tubular fitting 11 and not yet screwed completely, so that the fuel injection valve 2 in the provided in the hold 8 elongated opening 10 to compensate for manufacturing tolerances parallel to the longitudinal axis 18 of the hold 8th can be moved.

Fig. 8 zeigt in perspektivischer Darstellung eine Gesamtansicht einer Niederhaltepratze 8 mit Brennstoffeinspritzventil 2, die Teil eines erfindungsgemäßen Anschluss-Systems 1, la zum Anschluss einer Brennstoffverteilerleitung 4 an ein Brennstoffeinspritzventil 2 ist. Der Rohranschluss 44 ist auf das in das Brennstoffeinspritzventil 2 eingeschobene rohrförmige Anschlussstück 11 aufgesetzt und festgeschraubt, nachdem das Brennstoffeinspritzventil 2 in der länglichen Öffnung 10 zum Ausgleich der Fertigungstoleranzen parallel zur Längsachse 18 der Niederhaltepratze 8 verschoben worden ist. Fig. 8 shows a perspective view of an overall view of a hold-8 with fuel injector 2, which is part of a connection system 1, la according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2. The pipe connection 44 is placed and screwed onto the inserted into the fuel injector 2 tubular fitting 11 after the fuel injection valve 2 has been moved in the elongated opening 10 to compensate for manufacturing tolerances parallel to the longitudinal axis 18 of the hold 8.

Fig. 9 zeigt in perspektivischer Darstellung eine Teilansicht einer Niederhaltepratze 8 mit Brennstoffeinspritzventil 2, die Teil des erfindungsgemäßen Anschluss-Systems 1, 1a zum Anschluss einer Brennstoffverteilerleitung 4 an ein Brennstoffeinspritzventil 2 ist. Die längliche Öffnung 10 in der Niederhaltepratze 8 umschließt das rohrförmige, mit einem Außengewinde 42 versehene zulaufseitige Anschlussstück 11, das in das zulaufseitige Ende des Brennstoffeinspritzventils 2 eingesteckt ist. An einem zweiten Ende 20 der Niederhaltepratze 8 befindet sich zumindest eine Öffnung für die Aufnahme einer Schraube 41, die die Niederhaltepratze 8 mit ihrem zweiten Ende 20 an einer nicht weiter dargestellten Stirnseite des Zylinderkopfes fixiert. Fig. 9 shows a perspective view of a partial view of a hold-8 with fuel injector 2, which is part of the connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2. The elongated opening 10 in the holding-down claw 8 surrounds the tubular, provided with an external thread 42 inlet-side fitting 11, which in the inlet end of the Fuel injection valve 2 is inserted. At a second end 20 of the hold down claw 8 there is at least one opening for receiving a screw 41, which fixes the hold-down claw 8 with its second end 20 on a non-illustrated end face of the cylinder head.

Fig. 10 zeigt eine Gesamtansicht eines zulaufseitigen, rohrförmigen Anschlussstückes 11, das das Brennstoffeinspritzventil 2 an die Brennstoffverteilerleitung 4 anschließt. Das rohrförmige, zulaufseitige Anschlussstück 11 ist an seinem zulaufseitigen Ende mit einem Außengewinde 42 versehen und wird mit seinem ablaufseitigem Ende in das zulaufseitige Ende des Brennstoffeinspritzventils 2 gesteckt, nachdem ein Ring 46, dessen Durchmesser so bemessen ist, dass er über das Außengewinde 42 des rohrförmigen, zulaufseitigen Anschlussstücks 11 geschoben werden kann, unterhalb des Außengewindes 42 verschweißt ist. Fig. 10 shows an overall view of an inlet-side, tubular fitting 11, which connects the fuel injection valve 2 to the fuel rail 4. The tubular inlet-side fitting 11 is provided at its upstream end with an external thread 42 and is inserted with its downstream end in the inflow-side end of the fuel injection valve 2, after a ring 46 whose diameter is dimensioned so that it over the external thread 42 of the tubular , inflow-side connecting piece 11 can be pushed, is welded below the external thread 42.

Fig. 11 zeigt einen Schnitt durch einen mit dem rohrförmigen, zulaufseitigen Anschlussstück 11 zu verschraubenden Rohranschluss 44 zur Brennstoffverteilerleitung 4. Der Rohranschluss 44 weist ein Innengewinde 43 auf und wird mit seinem ablaufseitigen Ende auf das rohrförmige zulaufseitige Anschlussstück 11 gesteckt und verschraubt. Das zulaufseitige Ende 47 des Rohranschlusses 44 führt zur Brennstoffverteilerleitung 4. Fig. 11 shows a section through a to be screwed to the tubular, inlet-side connector 11 pipe connection 44 to the fuel rail 4. The pipe connection 44 has an internal thread 43 and is inserted with its outlet end to the tubular inlet-side connector 11 and screwed. The inlet-side end 47 of the pipe connection 44 leads to the fuel distributor line 4.

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

Claims (18)

  1. Connection system (1, 1a) for a fuel injection valve (2), which is to be inserted into a holding bore in a cylinder head, for connection to a fuel distributor line (4) which comprises a connection (5) to a pipeline (6) leading to a fuel reservoir, having a joining part (7) for joining to the pipeline (6),
    and also having a joining pipe between the fuel distributor line (4) and the fuel injection valve (2), with the fuel injection valve (2) being provided, at the inflow side, with a pipe connection (44) comprising a connection piece (11),
    characterized
    in that a hold-down bracket (8) has, at its first end (9), an elongate opening (10) for holding the connection piece (11), which is joined to the inflow-side end of the fuel injection valve (2), to the fuel distributor line (4),
    in that the connection piece (11) is pushed into the fuel injection valve (2) and is provided, at its inflow-side end, with an external thread (42) and the pipe connection (44) is joined with an internal thread (43) to the connection piece (11) by means of a screw joint,
    and in that the joining part (7) to the pipeline (6) has a screwed pipe joint (12) with an end piece (13), with the end piece (13) being spherical or having an inflow-side spherical surface (31) on an inflow-side end (29) and an outflow-side spherical surface (32) on an outflow-side end (30).
  2. Connection system according to Claim 1,
    characterized in that the connection system (1, 1a) is free from lateral forces.
  3. Connection system according to Claim 1,
    characterized in that the hold-down bracket (8) is a bent-up component.
  4. Connection system according to one of Claims 1 to 3,
    characterized in that the hold-down bracket (8) is made from sheet metal.
  5. Connection system according to one of Claims 1 to 4,
    characterized in that the hold-down bracket (8) is a
    punched component.
  6. Connection system according to one of Claims 1 to 5,
    characterized in that the opening (10) is bordered by a partial circle (14) and two secants (15).
  7. Connection system according to Claim 6,
    characterized in that the two secants (15) are aligned parallel to a longitudinal axis (18) of the hold-down bracket (8).
  8. Connection system according to one of Claims 1 to 4,
    characterized in that a periphery (17) of the elongate opening (10) of the hold-down bracket (8) is formed by a partial ellipse and two secants running parallel to its semimajor axis, with the semimajor axis and the longitudinal axis (18) of the hold-down bracket (8) coinciding.
  9. Connection system according to one of Claims 1 to 8,
    characterized in that a second end (20) of the hold-down bracket (8) bears against an end side of the cylinder head.
  10. Connection system according to one of Claims 1 to 9,
    characterized in that at least one opening (22) for fastening the hold-down bracket (8) to the end side of the cylinder head by means of a screw (41) is provided at a second end (20) of the hold-down bracket (8).
  11. Connection system according to Claim 1,
    characterized in that the screwed pipe joint (12) has a sleeve nut (23).
  12. Connection system according to one of Claims 1 to 11,
    characterized in that the sleeve nut (23), the end piece (13) and a seat (25) which is arranged on an inflow-side end (24) of the fuel distributor line (4) form a non-positively locking joint.
  13. Connection system according to Claim 12,
    characterized in that the inflow-side end (24) of the fuel distributor line (2) is formed in the manner of a
    flange (26).
  14. Connection system according to Claim 12,
    characterized in that the inflow-side end (24) of the fuel distributor line (3) is formed in the manner of a recess (27).
  15. Connection system according to one of Claims 12 to 14,
    characterized in that the seat (25) on the inflow-side end (24) of the fuel distributor line (4) is of conical design.
  16. Connection system according to Claim 14,
    characterized in that the end piece (13) is fixed in the recess (27) of the fuel distributor line (4) by means of a flat hold-down means (28) and at least two screws (38, 39).
  17. Connection system according to Claim 12,
    characterized in that the end piece (13) is a turned part.
  18. Connection system according to Claim 1,
    characterized in that the inflow-side spherical surface (31) and the outflow-side spherical surface (32) have different radii (33, 34).
EP06721183A 2005-05-25 2006-03-27 Connection system Not-in-force EP1888912B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005024053A DE102005024053A1 (en) 2005-05-25 2005-05-25 Connection System
PCT/EP2006/061050 WO2006125686A1 (en) 2005-05-25 2006-03-27 Connection system

Publications (2)

Publication Number Publication Date
EP1888912A1 EP1888912A1 (en) 2008-02-20
EP1888912B1 true EP1888912B1 (en) 2010-06-02

Family

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Family Applications (1)

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EP06721183A Not-in-force EP1888912B1 (en) 2005-05-25 2006-03-27 Connection system

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Country Link
US (1) US7461638B2 (en)
EP (1) EP1888912B1 (en)
JP (1) JP2008542601A (en)
DE (2) DE102005024053A1 (en)
WO (1) WO2006125686A1 (en)

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DE102005024053A1 (en) 2006-11-30
WO2006125686A1 (en) 2006-11-30
DE502006007103D1 (en) 2010-07-15
EP1888912A1 (en) 2008-02-20
US7461638B2 (en) 2008-12-09
JP2008542601A (en) 2008-11-27

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