EP2126335B1 - Injector with additional body - Google Patents

Injector with additional body Download PDF

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Publication number
EP2126335B1
EP2126335B1 EP08701473A EP08701473A EP2126335B1 EP 2126335 B1 EP2126335 B1 EP 2126335B1 EP 08701473 A EP08701473 A EP 08701473A EP 08701473 A EP08701473 A EP 08701473A EP 2126335 B1 EP2126335 B1 EP 2126335B1
Authority
EP
European Patent Office
Prior art keywords
injector
additional body
fuel
injector according
additional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08701473A
Other languages
German (de)
French (fr)
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EP2126335A1 (en
Inventor
Friedrich Boecking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2126335A1 publication Critical patent/EP2126335A1/en
Application granted granted Critical
Publication of EP2126335B1 publication Critical patent/EP2126335B1/en
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding 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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration

Definitions

  • the invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine according to the preamble of independent claim 1 and to an injection device with such an injector according to claim 10.
  • Such an injector is from the DE 100 25 984 A known.
  • a fixing device is provided, which has an additional body which adjoins the injector body and which has a support point for engagement with a clamping claw.
  • additional body which adjoins the injector body and which has a support point for engagement with a clamping claw.
  • the invention is therefore based on the object to propose an injector that can be produced with low material costs. Furthermore, the object is to provide an injection device with an inexpensive producible injector.
  • Fig. 1 a trained as a common rail injector injector 1 is shown.
  • the injector 1 is received in a receiving bore 2 of a cylinder head 3 of an internal combustion engine, wherein a tip 4 of a nozzle body 5 protrudes with a nozzle hole arrangement 6 in the combustion chamber 7 of an internal combustion engine.
  • the injector 1 is acted upon in the axial direction in the direction of a receiving bore floor 8, or in the direction of an annular disc 9 resting on the receiving base 8, by a clamping claw 10 with a clamping force (clamping force).
  • the clamping claw 10 is screwed by means of a clamping screw 11 in an internal thread 12 of a fixing hole 13 in the cylinder head 3.
  • the injector 1 comprises the already mentioned nozzle body 5 with a pressure chamber 14 and an adjustable in the axial direction guided nozzle needle 15.
  • On the nozzle body 5 is a throttle plate 16 and on this turn a valve plate 17.
  • an injector body 18 is arranged with an actuator space 19, wherein within the actuator space 19, an electromagnetic actuator 20 is received with a magnetic coil 21 and a magnet armature 22.
  • the armature 22 is formed integrally with a valve piston 23 of a control valve 24.
  • the nozzle body 5, the throttle plate 16 and the valve plate 17, within which the valve piston 23 of the control valve is received axially adjustable, are clamped by means of a nozzle retaining nut 25 which is penetrated in the axial direction of the tip 4 of the nozzle body 5 against the injector body 18.
  • the injector body 18 is provided with an external thread 26, onto which the nozzle clamping nut 25 is screwed.
  • the injector body 18, the throttle plate 16, the valve plate 17 and the nozzle body 5 are defined in relation to each other via not shown pointing in the axial direction of fixing pins.
  • the fuel pressure in a control chamber 27, in which a force acting on the nozzle needle 15 closing spring 28 is received are influenced in a conventional manner, whereby the nozzle needle 15, with its in the drawing plane upper end face 29, the control chamber 27 limited between a closed position in which the nozzle needle 15 abuts a needle seat 30 and the nozzle hole arrangement 6 blocks and an open position in which the fuel flow from the pressure chamber 14 is released through the nozzle hole arrangement 6 into the combustion chamber, are adjusted.
  • the pressure chamber 14 via a supply channel 31 with high pressure supplied fuel.
  • the control chamber 28 is connected via an inlet throttle 32.
  • a flow restrictor 34 is integrated, wherein the flow cross sections of the inlet throttle 32 and the outlet throttle 34 are coordinated such that when open control valve 24, a net outflow of fuel from the control chamber 27 in a low pressure region 35 (FIGS. Actuator 19) results.
  • the injector body 18 is provided with a high-pressure port 36 pointing in the axial direction, via which the supply channel 31 running in the axial direction can be connected to an external supply line 37 for high-pressure fuel.
  • the supply line 37 or a fastening flange 38 of the supply line 37 is clamped in the axial direction against the injector body 18 by means of a clamping nut 39, which is screwed onto an external thread 40 of the high-pressure connection 36.
  • Adjoining the injector body 18 is an additional body 41, which projects beyond the injector body 18 in the axial direction and which extends substantially parallel to the high-pressure port 36 and the section of the supply line 37 shown in the drawing.
  • the additional body 41 is not formed of high-pressure-resistant steel and has no high-pressure channels or spaces.
  • On a plane in the drawing upper end face 42 of the additional body 41 is a support point 43 is formed for the clamping claw 10, which thus acts directly in the axial direction kraftbeauf provided on the additional body 41, which in turn transmits the Pratzkraft on the adjacent in the axial direction of the injector 18.
  • a running in the axial direction of low pressure passage 44 is introduced, which continues within the injector body 18 into the actuator 19, so that when the control valve 24 open a control amount of fuel from the control chamber 27 through the actuator chamber 19 (low pressure region 35) and can flow from there via the low pressure passage 44 in the auxiliary body 41.
  • the additional body 41 is provided for this purpose in a recess 45 with a return port 46, to which a return line 47 is connected, which passes through the clamping claw 10 in the axial direction.
  • an electrical connection 51 is arranged within the recess 45.
  • Fig. 2 shows the auxiliary body 41 in a sectional view, wherein a lateral recess 52 can be seen, within which the supply line 37 is arranged, which is guided in this way almost in the axial direction by the additional body 41. Furthermore, two spaced-apart centering pins 53 protrude into the additional body 41, which are formed on the injector body 18 and thus align the auxiliary body 41 to the injector body 18 in a defined manner.
  • the additional body 41 is provided with three circumferentially spaced-apart guides, which are provided at an angle of approximately 120 ° to each other arranged guides 54, which serve to rest on a peripheral wall 55 of the receiving bore 2 and thus center the injector 1.

Abstract

The invention relates to an injector (1) for injecting fuel into combustion chambers (7) of internal combustion engines, in particular a common-rail injector, having an injector body (18), which holds an actuator (20), with a high-pressure connection (36) for fuel. According to the invention, it is provided that the injector body (18) is adjoined by an additional body (41) with a support point (43) for contact against a clamping bracket (10).

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Injektor zum Einspritzen von Kraftstoff in einen Brennraum einer Brennkraftmaschine nach dem Oberbegriff des unabhängigen Anspruchs 1 sowie eine Einspritzvorrichtung mit einem derartigen Injektor gemäß Anspruch 10.The invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine according to the preamble of independent claim 1 and to an injection device with such an injector according to claim 10.

Ein derartiger Injektor ist aus der DE 100 25 984 A bekannt. Bei dem bekannten Injektor ist eine Fixiervorrichtung vorgesehen, die einen Zusatzkörper aufweist, der an den Injektorkörper angrenzt und der eine Auflagestelle zur Anlage an einer Spannpratze aufweist. Weitere Zusatzfunktionen des Zusatzkörpers sind der oben genannten Schrift jedoch nicht entnehmbar.Such an injector is from the DE 100 25 984 A known. In the known injector, a fixing device is provided, which has an additional body which adjoins the injector body and which has a support point for engagement with a clamping claw. However, further additional functions of the additional body can not be deduced from the above-mentioned document.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Injektor vorzuschlagen, der mit geringen Materialkosten herstellbar ist. Ferner besteht die Aufgabe darin, eine Einspritzvorrichtung mit einem kostengünstig herstellbaren Injektor bereitzustellen.The invention is therefore based on the object to propose an injector that can be produced with low material costs. Furthermore, the object is to provide an injection device with an inexpensive producible injector.

Diese Aufgabe wird bei Injektoren mit den Merkmalen des unabhängigen Anspruchs gelöst. Vorteilhafte Weiterbildungen des jeweiligen Injektors sind in den zugeordneten Unteransprüchen aufgeführt.This object is achieved in injectors with the features of the independent claim. Advantageous developments of the respective injector are listed in the associated subclaims.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele, siehe anhand der Zeichnungen. Diese zeigen in:

Fig. 1:
eine geschnittene Ansicht einer Einspritzvorrichtung mit einem einen Injektorkörper sowie einen Zusatzkörper aufweisenden Injektor und
Fig. 2:
eine Schnittdarstellung entlang der Schnittlinie A-A gemäß Fig. 1.
Further advantages, features and details of the invention will become apparent from the following description Exemplary embodiments, see with reference to the drawings. These show in:
Fig. 1:
a sectional view of an injection device with an injector body and an additional body having injector and
Fig. 2:
a sectional view along the section line AA according to Fig. 1 ,

Ausführungsform der ErfindungEmbodiment of the invention

In den Figuren sind gleiche Bauteile und Bauteile mit der gleichen Funktion mit den gleichen Bezugszeichen gekennzeichnet.In the figures, the same components and components with the same function with the same reference numerals.

In Fig. 1 ist ein als Common-Rail-Injektor ausgebildeter Injektor 1 gezeigt. Der Injektor 1 ist in einer Aufnahmebohrung 2 eines Zylinderkopfes 3 einer Brennkraftmaschine aufgenommen, wobei eine Spitze 4 eines Düsenkörpers 5 mit einer Düsenlochanordnung 6 in den Brennraum 7 einer Brennkraftmaschine hineinragt.In Fig. 1 a trained as a common rail injector injector 1 is shown. The injector 1 is received in a receiving bore 2 of a cylinder head 3 of an internal combustion engine, wherein a tip 4 of a nozzle body 5 protrudes with a nozzle hole arrangement 6 in the combustion chamber 7 of an internal combustion engine.

Der Injektor 1 wird in axialer Richtung in Richtung eines Aufnahmebohrungsbodens 8, bzw. in Richtung auf eine auf dem Aufnahmeboden 8 aufliegende Ringscheibe 9 von einer Spannpratze 10 mit einer Pratzkraft (Spannkraft) beaufschlagt. Dabei ist die Spannpratze 10 mittels einer Spannschraube 11 in ein Innengewinde 12 einer Fixierbohrung 13 im Zylinderkopf 3 verschraubt.The injector 1 is acted upon in the axial direction in the direction of a receiving bore floor 8, or in the direction of an annular disc 9 resting on the receiving base 8, by a clamping claw 10 with a clamping force (clamping force). In this case, the clamping claw 10 is screwed by means of a clamping screw 11 in an internal thread 12 of a fixing hole 13 in the cylinder head 3.

Der Injektor 1 umfasst den bereits erwähnten Düsenkörper 5 mit einem Druckraum 14 und einer in axialer Richtung verstellbar geführten Düsennadel 15. Auf dem Düsenkörper 5 liegt eine Drosselplatte 16 und auf dieser wiederum eine Ventilplatte 17 auf. In der Zeichnungsebene oberhalb der Ventilplatte 17 ist ein Injektorkörper 18 mit einem Aktuatorraum 19 angeordnet, wobei innerhalb des Aktuatorraums 19 ein elektromagnetischer Aktuator 20 mit einer Magnetspule 21 und einem Magnetanker 22 aufgenommen ist. Der Magnetanker 22 ist einstückig mit einem Ventilkolben 23 eines Steuerventils 24 ausgebildet. Der Düsenkörper 5, die Drosselplatte 16 und die Ventilplatte 17, innerhalb derer der Ventilkolben 23 des Steuerventils axial verstellbar aufgenommen ist, werden mittels einer Düsenspannmutter 25, die in axialer Richtung von der Spitze 4 des Düsenkörpers 5 durchsetzt ist, gegen den Injektorkörper 18 verspannt. Hierzu ist der Injektorkörper 18 mit einem Außengewinde 26 versehen, auf das die Düsenspannmutter 25 aufgeschraubt ist. Der Injektorkörper 18, die Drosselplatte 16, die Ventilplatte 17 und der Düsenkörper 5 sind definiert zueinander über nicht dargestellte in axialer Richtung weisende Fixierstifte ausgerichtet.The injector 1 comprises the already mentioned nozzle body 5 with a pressure chamber 14 and an adjustable in the axial direction guided nozzle needle 15. On the nozzle body 5 is a throttle plate 16 and on this turn a valve plate 17. In the drawing plane above the valve plate 17, an injector body 18 is arranged with an actuator space 19, wherein within the actuator space 19, an electromagnetic actuator 20 is received with a magnetic coil 21 and a magnet armature 22. The armature 22 is formed integrally with a valve piston 23 of a control valve 24. The nozzle body 5, the throttle plate 16 and the valve plate 17, within which the valve piston 23 of the control valve is received axially adjustable, are clamped by means of a nozzle retaining nut 25 which is penetrated in the axial direction of the tip 4 of the nozzle body 5 against the injector body 18. For this purpose, the injector body 18 is provided with an external thread 26, onto which the nozzle clamping nut 25 is screwed. The injector body 18, the throttle plate 16, the valve plate 17 and the nozzle body 5 are defined in relation to each other via not shown pointing in the axial direction of fixing pins.

Mittels des Steuerventils 24 kann in an sich bekannter Weise der Kraftstoffdruck in einer Steuerkammer 27, in der auch eine auf die Düsennadel 15 wirkende Schließfeder 28 aufgenommen ist, beeinflusst werden, wodurch die Düsennadel 15, die mit ihrer in der Zeichnungsebene oberen Stirnseite 29 die Steuerkammer 27 begrenzt zwischen einer Schließstellung, in der die Düsennadel 15 an einem Nadelsitz 30 anliegt und die Düsenlochanordnung 6 versperrt und einer Öffnungsstellung, in der der Kraftstofffluss aus dem Druckraum 14 durch die Düsenlochanordnung 6 hindurch in den Brennraum freigegeben wird, verstellt werden. Dabei wird der Druckraum 14 über einen Versorgungskanal 31 mit unter Hochdruck stehendem Kraftstoff versorgt. An diesen Versorgungskanal 31 ist die Steuerkammer 28 über eine Zulaufdrossel 32 angeschlossen. In dem mittels des Steuerventils 24 öffnenbaren und schließbaren Kraftstoffablaufkanal 33 ist eine Ablaufdrossel 34 integriert, wobei die Durchflussquerschnitte der Zulaufdrossel 32 und der Ablaufdrossel 34 derart aufeinander abgestimmt sind, dass bei geöffnetem Steuerventil 24 ein Nettoabfluss von Kraftstoff aus der Steuerkammer 27 in einen Niederdruckbereich 35 (Aktuatorraum 19) resultiert.By means of the control valve 24, the fuel pressure in a control chamber 27, in which a force acting on the nozzle needle 15 closing spring 28 is received, are influenced in a conventional manner, whereby the nozzle needle 15, with its in the drawing plane upper end face 29, the control chamber 27 limited between a closed position in which the nozzle needle 15 abuts a needle seat 30 and the nozzle hole arrangement 6 blocks and an open position in which the fuel flow from the pressure chamber 14 is released through the nozzle hole arrangement 6 into the combustion chamber, are adjusted. In this case, the pressure chamber 14 via a supply channel 31 with high pressure supplied fuel. At this supply channel 31, the control chamber 28 is connected via an inlet throttle 32. In the openable and closable by means of the control valve 24 fuel drain passage 33, a flow restrictor 34 is integrated, wherein the flow cross sections of the inlet throttle 32 and the outlet throttle 34 are coordinated such that when open control valve 24, a net outflow of fuel from the control chamber 27 in a low pressure region 35 (FIGS. Actuator 19) results.

Der Injektorkörper 18 ist mit einem in axialer Richtung weisenden Hochdruckanschluss 36 versehen, über den der in axialer Richtung verlaufende Versorgungskanal 31 an eine externe Versorgungsleitung 37 für unter Hochdruck stehenden Kraftstoff anschließbar ist. Die Versorgungsleitung 37 bzw. ein Befestigungsflansch 38 der Versorgungsleitung 37 ist hierzu mittels einer Spannmutter 39, die auf ein Außengewinde 40 des Hochdruckanschlusses 36 verschraubt ist, in axialer Richtung gegen den Injektorkörper 18 verspannt.The injector body 18 is provided with a high-pressure port 36 pointing in the axial direction, via which the supply channel 31 running in the axial direction can be connected to an external supply line 37 for high-pressure fuel. For this purpose, the supply line 37 or a fastening flange 38 of the supply line 37 is clamped in the axial direction against the injector body 18 by means of a clamping nut 39, which is screwed onto an external thread 40 of the high-pressure connection 36.

An dem Injektorkörper 18 liegt ein Zusatzkörper 41 an, der den Injektorkörper 18 in axialer Richtung überragt und der sich im Wesentlichen parallel zu dem Hochdruckanschluss 36 und dem in der Zeichnung gezeigten Abschnitt der Versorgungsleitung 37 erstreckt. Im Gegensatz zu dem Injektorkörper 18 ist der Zusatzkörper 41 nicht aus hochdruckfestem Stahl ausgebildet und weist keine Hochdruckkanäle oder -räume auf. Auf einer in der Zeichnungsebene oberen Stirnseite 42 des Zusatzkörpers 41 ist eine Auflagestelle 43 für die Spannpratze 10 ausgebildet, die somit unmittelbar in axialer Richtung kraftbeaufschlagend auf den Zusatzkörper 41 wirkt, der wiederum die Pratzkraft auf den in axialer Richtung benachbarten Injektorkörper 18 überträgt.Adjoining the injector body 18 is an additional body 41, which projects beyond the injector body 18 in the axial direction and which extends substantially parallel to the high-pressure port 36 and the section of the supply line 37 shown in the drawing. In contrast to the injector body 18, the additional body 41 is not formed of high-pressure-resistant steel and has no high-pressure channels or spaces. On a plane in the drawing upper end face 42 of the additional body 41 is a support point 43 is formed for the clamping claw 10, which thus acts directly in the axial direction kraftbeaufschlagend on the additional body 41, which in turn transmits the Pratzkraft on the adjacent in the axial direction of the injector 18.

In den Zusatzkörper 41 ist ein in axialer Richtung verlaufender Niederdruckkanal 44 eingebracht, der sich innerhalb des Injektorkörpers 18 bis in den Aktuatorraum 19 fortsetzt, so dass bei geöffnetem Steuerventil 24 eine Steuermenge an Kraftstoff aus der Steuerkammer 27 durch den Aktuatorraum 19 (Niederdruckbereich 35) und von dort aus über den Niederdruckkanal 44 im Zusatzkörper 41 abfließen kann. Der Zusatzkörper 41 ist zu diesem Zweck in einer Ausnehmung 45 mit einem Rücklaufanschluss 46 versehen, an den eine Rücklaufleitung 47 angeschlossen ist, die die Spannpratze 10 in axialer Richtung durchsetzt.In the additional body 41, a running in the axial direction of low pressure passage 44 is introduced, which continues within the injector body 18 into the actuator 19, so that when the control valve 24 open a control amount of fuel from the control chamber 27 through the actuator chamber 19 (low pressure region 35) and can flow from there via the low pressure passage 44 in the auxiliary body 41. The additional body 41 is provided for this purpose in a recess 45 with a return port 46, to which a return line 47 is connected, which passes through the clamping claw 10 in the axial direction.

Ferner ist in den Zusatzkörper 41, im Wesentlichen parallel zu dem Niederdruckkanal 44 verlaufend ein weiterer Kanal 48 zur Aufnahme von elektrischen Leitungen 49 zur Stromversorgung des Aktuators 20 vorgesehen. Zum Anschluss der elektrischen Leitungen 49 an eine externe elektrische Versorgungsleitung 50 ist innerhalb der Ausnehmung 45 ein elektrischer Anschluss 51 angeordnet.Further, in the additional body 41, substantially parallel to the low pressure passage 44 extending another channel 48 for receiving electrical leads 49 for the power supply of the actuator 20 is provided. To connect the electrical lines 49 to an external electrical supply line 50, an electrical connection 51 is arranged within the recess 45.

Fig. 2 zeigt den Zusatzkörper 41 in einer Schnittansicht, wobei eine seitliche Aussparung 52 zu erkennen ist, innerhalb derer die Versorgungsleitung 37 angeordnet, die auf diese Weise quasi in axialer Richtung durch den Zusatzkörper 41 hindurchgeführt ist. Ferner ragen in den Zusatzkörper 41 zwei beabstandete Zentrierstifte 53 hinein, die an den Injektorkörper 18 angeformt sind und somit den Zusatzkörper 41 definiert zu dem Injektorkörper 18 ausrichten. Fig. 2 shows the auxiliary body 41 in a sectional view, wherein a lateral recess 52 can be seen, within which the supply line 37 is arranged, which is guided in this way almost in the axial direction by the additional body 41. Furthermore, two spaced-apart centering pins 53 protrude into the additional body 41, which are formed on the injector body 18 and thus align the auxiliary body 41 to the injector body 18 in a defined manner.

Randseitig ist der Zusatzkörper 41 mit drei in Umfangsrichtung voneinander beabstandet, in einem Winkel von jeweils etwa 120° zueinander angeordneten Führungen 54 versehen, die zur Anlage an einer Umfangswand 55 der Aufnahmebohrung 2 dienen und somit den Injektor 1 zentrieren.On the edge side, the additional body 41 is provided with three circumferentially spaced-apart guides, which are provided at an angle of approximately 120 ° to each other arranged guides 54, which serve to rest on a peripheral wall 55 of the receiving bore 2 and thus center the injector 1.

Claims (10)

  1. Injector for injecting fuel into a combustion chamber (7) of an internal combustion engine, in particular common-rail injector, having an injector body (18) which accommodates an actuator (20) and which has a high-pressure connection (36) for fuel, and having an additional body (41), wherein the injector body (18) is adjoined by the additional body (41) which has a support point (43) for making contact with a clamping bracket (10),
    characterized
    in that a supply line (37), which leads to the high-pressure connection (36), of the injector (1) is guided as a separate component past the additional body (41) and/or through the latter, in particular axially through a lateral recess (52).
  2. Injector according to Claim 1, characterized in that the support point (43) is arranged on an end side (42), which faces away from a nozzle needle tip of the injector (1), of the additional body (41).
  3. Injector according to Claim 1 or 2, characterized in that at least one alignment means is provided for aligning the additional body (41) relative to the injector body (18).
  4. Injector according to Claim 3, characterized in that the alignment means is designed as at least one centring pin (53).
  5. Injector according to either of Claims 3 and 4, characterized in that the alignment means is formed by the in particular eccentrically arranged high-pressure connection (36) and/or by the supply line (37) which leads to the high-pressure connection (36).
  6. Injector according to one of the preceding claims, characterized in that at least one fuel low-pressure duct (44) is provided in the additional body (41).
  7. Injector according to Claim 6, characterized in that on the additional body (41) there is arranged a return connection (46) for a fuel control quantity and/or a fuel leakage quantity.
  8. Injector according to one of the preceding claims, characterized in that an electrical line (49) for providing a supply to the actuator (20) is guided through the additional body (41).
  9. Injector according to Claim 8, characterized in that an electrical terminal (51) for connecting the electrical line (49) to an electrical supply line (50) is provided on the additional body (41).
  10. Injection device having an injector (10) with the features of one of the preceding claims and having a clamping bracket (10) which bears against the contact point of the additional body (41).
EP08701473A 2007-02-19 2008-01-15 Injector with additional body Not-in-force EP2126335B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007008146A DE102007008146A1 (en) 2007-02-19 2007-02-19 Injector with additional body
PCT/EP2008/050361 WO2008101748A1 (en) 2007-02-19 2008-01-15 Injector with additional body

Publications (2)

Publication Number Publication Date
EP2126335A1 EP2126335A1 (en) 2009-12-02
EP2126335B1 true EP2126335B1 (en) 2012-03-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08701473A Not-in-force EP2126335B1 (en) 2007-02-19 2008-01-15 Injector with additional body

Country Status (4)

Country Link
EP (1) EP2126335B1 (en)
AT (1) ATE549509T1 (en)
DE (1) DE102007008146A1 (en)
WO (1) WO2008101748A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012205701A1 (en) 2012-04-05 2013-10-10 Robert Bosch Gmbh Arrangement comprising a housing part of an internal combustion engine, a fuel injector and a clamping claw
DE102012206486A1 (en) 2012-04-19 2013-10-24 Robert Bosch Gmbh A clamping claw for securing a fuel injector to a cylinder head on an internal combustion engine, comprising an assembly comprising a clamping claw and fuel injection system comprising a clamping claw

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10025984B4 (en) * 2000-05-25 2014-07-03 Continental Automotive Gmbh Clamping means for clamping an injection valve
DE10155678A1 (en) 2001-11-13 2003-05-22 Bosch Gmbh Robert Clamp, to lock a fuel injection valve in its drilling through the cylinder head of an IC motor, has a clamp paw which presses symmetrically against a linear bearing surface without a tilting movement
JP2006037866A (en) * 2004-07-28 2006-02-09 Nissan Motor Co Ltd Fixing construction of fuel injection valve
DE102005011574A1 (en) * 2005-03-14 2006-09-21 Robert Bosch Gmbh Intermediate element for a fuel injection valve
EP1884657B1 (en) * 2006-08-04 2009-07-15 Continental Automotive GmbH Fixing device for fixing a fuel injector in a cylinder head of a combustion engine

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EP2126335A1 (en) 2009-12-02
WO2008101748A1 (en) 2008-08-28
ATE549509T1 (en) 2012-03-15
DE102007008146A1 (en) 2008-08-21

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