EP0671560A1 - Holding device for a fuel injection valve as well as holding device for an individual injection pump acting on that fuel injection valve - Google Patents

Holding device for a fuel injection valve as well as holding device for an individual injection pump acting on that fuel injection valve Download PDF

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Publication number
EP0671560A1
EP0671560A1 EP95102643A EP95102643A EP0671560A1 EP 0671560 A1 EP0671560 A1 EP 0671560A1 EP 95102643 A EP95102643 A EP 95102643A EP 95102643 A EP95102643 A EP 95102643A EP 0671560 A1 EP0671560 A1 EP 0671560A1
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EP
European Patent Office
Prior art keywords
clamping bracket
cylinder head
nozzle holder
nozzle
clamping
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
EP95102643A
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German (de)
French (fr)
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EP0671560B1 (en
Inventor
Dieter Dipl. Ing. Reitz
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Adam Opel GmbH
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Adam Opel GmbH
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Publication date
Priority claimed from DE4408385A external-priority patent/DE4408385A1/en
Application filed by Adam Opel GmbH filed Critical Adam Opel GmbH
Publication of EP0671560A1 publication Critical patent/EP0671560A1/en
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Publication of EP0671560B1 publication Critical patent/EP0671560B1/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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to a holding device for a fuel injection valve of a diesel engine according to patent application P 43 18 434.0 and a holder for a single injection pump acting on a fuel injection valve held in this way.
  • a separate injection pump is required in addition to the tensioning bracket, which supplies the fuel to the tensioning bracket via an externally laid injection line and, via this, to the nozzle holder and thus to the injection nozzle.
  • Sufficient additional installation space must be provided for this injection pump.
  • An injection line must lead from the injection pump to each tensioning bracket, the individual injection lines being as long as possible with one another in order to achieve the same pressure requirements at each injection nozzle.
  • the injection nozzle and the single injection pump are arranged coaxially one above the other and therefore require a considerable overall height.
  • an engine height is produced which, in particular in motor vehicle construction, often precludes application.
  • the invention is therefore based on the object of further developing a holding device of the type mentioned in such a way that, in addition to the advantages of the pump-nozzle unit, a flat engine type, which is particularly useful for motor vehicles, is also possible with the injection nozzle arranged centrally to the combustion chamber and below a camshaft .
  • This connecting line can run completely inside the pump housing if the pump housing and the clamping bracket start from a common flange attached to the cylinder head.
  • each cylinder is assigned an injection nozzle 11, which is held in a chamber 9 of the cylinder head 1 by a nozzle holder 10.
  • the nozzle holder 10 is supported by a seal 13 on a sealing surface 12 of the chamber 9.
  • a ball 22 in a depression of the nozzle holder 10 holds the nozzle holder 10 in a defined position in connection with a groove 24 in the wall of the chamber 9.
  • the upper end face 15 of the nozzle holder 10 projects only slightly beyond the upper region 14 of the cylinder head 1.
  • a clamping bracket 29 which is attached to the sealing cone on the end face 15 of the nozzle holder 10 with a ball socket 30 is supported and which is connected at one of its two ends to a flange 46 and can be clamped at its other free end by a clamping screw 31 to the nozzle holder 10.
  • the flange 46 and thus also the clamping bracket 29 are supported in a receiving opening 28 of a web 26 at the edge of the cylinder head 1.
  • a single injection pump 47 Connected to the flange 46 is a single injection pump 47, the central axis of which runs approximately parallel to the longitudinal direction of the clamping bracket 29 at the level of the camshaft 6.
  • a roller tappet 48 of the pump piston 49 is operatively connected to a cam of the camshaft 6.
  • the single injection pump 47 is in on known manner connected to an electronically controlled solenoid valve 50, which relieves the pressure chamber 51 of the single injection pump 47 at the end of injection or at zero delivery.
  • the pressure chamber 51 is connected to a channel 52 in the flange 46 directly to the pressure channel 33 in the clamping bracket 29 and thus to the injection nozzle 11.
  • the leak oil bore 20 is connected via a leak oil bore 40 running in the clamping bracket 29 to a fuel supply line 53 which is at a low delivery pressure.
  • a channel 54 in the flange 46 leads from the fuel supply line 53 to the pressure chamber 51, the mouth of this channel 54 in the pressure chamber 51 being passed over when the pump piston 49 is immersed, so that the required
  • the flange 46 is inserted together with the single injection pump 47 attached to it and the clamping bracket 29 into the receiving opening 28 at a slight incline, so that the ball socket 30 on the clamping bracket 29 passes over the sealing cone on the end face 15 of the nozzle holder 10.
  • This inclined position is made possible by the elastic sealing ring 32, which seals the flange 46 with respect to the web 26.
  • the flange 46 can then be fixed relative to the web 26 of the cylinder head 1 by means of flange fastening screws 55.
  • the ball socket 30 of the clamping bracket 29 can be pressed onto the end face 15 of the nozzle holder 10, the clamping bracket 29 being deformed elastically over its length.
  • the clamping bracket 29 thus acts as a spiral spring and keeps the clamping force on the nozzle holder 10 almost constant even with different thermal expansions of the nozzle holder 10 and cylinder head 1.
  • the nozzle holders 10 are arranged directly below the single camshaft 6, it can also be in the immediate vicinity of the Injection nozzles 11 arranged single injection pumps 47 are used, which due to their mounting do not increase the engine height.
  • the advantages of the short injection lines known in the case of individual injection pumps, which in the present exemplary embodiment only consist of the channel 52 in the flange 46, the pressure channel 33 in the clamping bracket 29 and the pressure channel 17 in the nozzle holder 10, are retained.
  • the clamping bracket 29 can be held in a separate receiving opening on the web 26 of the cylinder head 1 in addition to a further flange receptacle in the web 26 for the single injection pump 47.
  • the separate receiving opening for the clamping bracket 29 can also be provided in the flange for fastening the single injection pump 47. In such designs, however, a short additional pressure line connection between the single injection pump and the clamping bracket is then required.

Abstract

A nozzle holder (10) is inserted from the top in a guiding bore in the cylinder. An injection passage from the individual pump mounted at the side of the head leads to the holder, which extends below the camshaft (6) to a clamping stirrup (29), having at the top end a conical recess from which a fuel passage runs to the nozzle, and a leak-off one to the side. A spherical boss between the stirrup ends fits in the recess, one end fitting in a recess (28) at the side of the head and the other being held by a clamping screw, while an elastic seal fits between the boss and recess. The pump (47) is level with the camshaft and parallel to the stirrup at the side of the head, its plunger being actuated by the camshaft, while its pressure chamber is connected directly by a passage (52) to the pressure passage in the stirrup. The pump housing and stirrup can form a common flange, the pump itself being elastically bent on the holder by the clamping screw.

Description

Die Erfindung betrifft eine Haltevorrichtung für ein Kraftstoffeinspritzventil eines Dieselmotors nach Patentanmeldung P 43 18 434.0 sowie eine Halterung für eine auf ein so gehaltertes Kraftstoffeinspritzventil wirkende Einzeleinspritzpumpe.The invention relates to a holding device for a fuel injection valve of a diesel engine according to patent application P 43 18 434.0 and a holder for a single injection pump acting on a fuel injection valve held in this way.

Bei einer Haltevorrichtung gemäß der Hauptanmeldung ist neben dem Spannbügel eine gesonderte Einspritzpumpe erforderlich, welche den Kraftstoff über eine extern verlegte Einspritzleitung dem Spannbügel und über diesen dem Düsenhalter und somit der Einspritzdüse zuführt. Für diese Einspritzpumpe muß ausreichender zusätzlicher Einbauraum vorgesehen werden. Von der Einspritzpumpe muß zu jedem Spannbügel eine Einspritzleitung führen, wobei die einzelnen Einspritzleitungen untereinander möglichst gleich lang sein sollen, um gleiche Druckvoraussetzungen an jeder Einspritzdüse zu erreichen.In the case of a holding device according to the main application, a separate injection pump is required in addition to the tensioning bracket, which supplies the fuel to the tensioning bracket via an externally laid injection line and, via this, to the nozzle holder and thus to the injection nozzle. Sufficient additional installation space must be provided for this injection pump. An injection line must lead from the injection pump to each tensioning bracket, the individual injection lines being as long as possible with one another in order to achieve the same pressure requirements at each injection nozzle.

Um diese Forderungen zu erfüllen, ist erheblicher technischer Aufwand erforderlich. Infolge der baulich bedingten Länge der Einspritzleitungen kann sich insbesondere bei Direkteinspritzung ein zu großes hydraulisches Totvolumen ergeben, so daß eine exakte Zumessung der Kraftstoffmengen nicht mehr möglich ist. Um die erforderlichen extrem hohen Einspritzdrücke für Dieselbrennkraftmaschinen mit Direkteinspritzung erzielen zu können, ist es bekannt, jeder Einspritzdüse eine Einzeleinspritzpumpe zuzuordnen und diese dann mit einer Nockenwelle anzutreiben (DE Zeitschrift Mot 12/93, Beilage Jufa, Seite 10 bis 13). Bei solchen Pumpe-Düse-Einheiten sind keine gesondert verlegten Einspritzleitungen erforderlich. Sie haben dadurch ein sehr kleines hydraulisches Totvolumen und sind für höchste Einspritzdrücke gut geeignet. Bei den bekannten Ausführungen ohne zusätzliche Einspritzleitungen zwischen Einzeleinspritzpumpe und Einspritzdüse sind Einspritzdüse und Einzeleinspritzpumpe aber gleichachsig übereinander angeordnet und erfordern so eine erhebliche Bauhöhe. Bei einer Anordnung einer solchen Pumpe-Düse-Einheit unter einer im Zylinderkopf angeordneten Nockenwelle entsteht eine Motorbauhöhe, die insbesondere im Kraftfahrzeugbau oft einer Anwendung entgegensteht.To meet these requirements, considerable technical effort is required. Due to the structural length of the injection lines, too large a hydraulic dead volume can result, particularly in the case of direct injection, so that an exact metering of the fuel quantities is no longer possible. To the required extreme To be able to achieve high injection pressures for diesel internal combustion engines with direct injection, it is known to assign a single injection pump to each injection nozzle and then drive it with a camshaft (DE magazine Mot 12/93, Beilage Jufa, pages 10 to 13). With such pump-nozzle units, no separately laid injection lines are required. As a result, they have a very small hydraulic dead volume and are well suited for the highest injection pressures. In the known designs without additional injection lines between the single injection pump and the injection nozzle, the injection nozzle and the single injection pump are arranged coaxially one above the other and therefore require a considerable overall height. When such a pump-nozzle unit is arranged under a camshaft arranged in the cylinder head, an engine height is produced which, in particular in motor vehicle construction, often precludes application.

Der Erfindung liegt somit die Aufgabe zugrunde, eine Haltevorrichtung der eingangs genannten Art derart weiterzuentwickeln, daß neben den Vorteilen der Pumpe-Düse-Einheit auch eine flache, insbesondere für Kraftfahrzeuge brauchbare Motorbauart auch bei Anordnung der Einspritzdüse zentral zum Brennraum und unterhalb einer Nockenwelle möglich ist.The invention is therefore based on the object of further developing a holding device of the type mentioned in such a way that, in addition to the advantages of the pump-nozzle unit, a flat engine type, which is particularly useful for motor vehicles, is also possible with the injection nozzle arranged centrally to the combustion chamber and below a camshaft .

Erfindungsgemäß wird dies durch die im Hauptanspruch genannten Merkmale der Erfindung gelöst.According to the invention, this is solved by the features of the invention mentioned in the main claim.

Da so die Einzeleinspritzpumpen seitlich neben der Nockenwelle liegen, tragen sie zur Bauhöhe des Motors nicht bei. Ein weiterer Vorteil ergibt sich dadurch, daß bei einer solchen Anordnung die Druckseite der Pumpe unmittelbar benachbart an der Mündungsstelle des Druckkanals des Spannbügels liegt und somit eine nur sehr kurze Verbindungsleitung erforderlich ist.Since the individual injection pumps are located to the side of the camshaft, they do not contribute to the overall height of the engine. A further advantage results from the fact that with such an arrangement the pressure side of the pump is located directly adjacent to the mouth of the pressure channel of the tensioning bracket and therefore only a very short connecting line is required.

Diese Verbindungsleitung kann vollständig innerhalb des Pumpengehäuses verlaufen, wenn das Pumpengehäuse und der Spannbügel von einem gemeinsamen am Zylinderkopf befestigten Flansch ausgehen.This connecting line can run completely inside the pump housing if the pump housing and the clamping bracket start from a common flange attached to the cylinder head.

Ein Ausführungsbeispiel der Erfindung ist nachstehend anhand einer Zeichnung näher beschrieben.An embodiment of the invention is described below with reference to a drawing.

In einem Zylinderkopf 1 eines Dieselmotors ist jedem Zylinder eine Einspritzdüse 11 zugeordnet, die in einer Kammer 9 des Zylinderkopfes 1 von einem Düsenhalter 10 gehalten ist. Der Düsenhalter 10 stützt sich über eine Dichtung 13 auf einer Dichtfläche 12 der Kammer 9 ab. Eine Kugel 22 in einer Einsenkung des Düsenhalters 10 hält in Verbindung mit einer Nut 24 in der Wand der Kammer 9 den Düsenhalter 10 in einer definierten Lage. An der oberen Stirnseite 15 des Düsenhalters 10 befindet sich ein Dichtkonus, von dessen Zentrum aus ein Druckkanal 17 zur Einspritzdüse 11 führt und von dessen Randbereich eine Leckölbohrung 20 zu den Leckölbereichen des Düsenhalters 10 führt. Die obere Stirnseite 15 des Düsenhalters 10 überragt nur geringfügig den oberen Bereich 14 des Zylinderkopfes 1. Über dem Düsenhalter 10, jedoch unterhalb der Nockenwelle 6, liegt ein Spannbügel 29, der sich mit einem Kugelstutzen 30 auf dem Dichtkonus an der Stirnseite 15 des Düsenhalters 10 abstützt und der an einem seiner beiden Enden mit einem Flansch 46 verbunden ist und mit seinem anderen freien Ende durch eine Spannschraube 31 zu dem Düsenhalter 10 hin spannbar ist. Der Flansch 46 und somit auch der Spannbügel 29 stützen sich in einer Aufnahmeöffnung 28 eines Steges 26 am Rand des Zylinderkopfes 1 ab. Mit dem Flansch 46 verbunden ist eine Einzeleinspritzpumpe 47, deren Mittelachse annähernd parallel zur Längsrichtung des Spannbügels 29 in Höhe der Nockenwelle 6 verläuft. Ein Rollenstößel 48 des Pumpenkolbens 49 steht mit einem Nocken der Nockenwelle 6 in Wirkverbindung. Die Einzeleinspritzpumpe 47 ist in an sich bekannter Weise mit einem elektronisch gesteuerten Magnetventil 50 verbunden, welches den Druckraum 51 der Einzeleinspritzpumpe 47 bei Einspritzende bzw. bei Nullförderung entlastet. Der Druckraum 51 ist mit einem Kanal 52 im Flansch 46 direkt mit dem Druckkanal 33 im Spannbügel 29 und somit mit der Einspritzdüse 11 verbunden. Die Leckölbohrung 20 steht über eine im Spannbügel 29 verlaufende Leckölbohrung 40 mit einer unter geringem Förderdruck stehenden Kraftstoffzuführleitung 53 in Verbindung. Von der Kraftstoffzuführleitung 53 führt ein Kanal 54 im Flansch 46 zum Druckraum 51, wobei die Mündung dieses Kanals 54 im Druckraum 51 bei Eintauchen des Pumpenkolbens 49 überfahren wird, so daß sich im Druckraum 51 der erforderliche Einspritzdruck aufbauen kann.In a cylinder head 1 of a diesel engine, each cylinder is assigned an injection nozzle 11, which is held in a chamber 9 of the cylinder head 1 by a nozzle holder 10. The nozzle holder 10 is supported by a seal 13 on a sealing surface 12 of the chamber 9. A ball 22 in a depression of the nozzle holder 10 holds the nozzle holder 10 in a defined position in connection with a groove 24 in the wall of the chamber 9. On the upper end face 15 of the nozzle holder 10 there is a sealing cone, from the center of which a pressure channel 17 leads to the injection nozzle 11 and from the edge region of which a leak oil hole 20 leads to the leak oil regions of the nozzle holder 10. The upper end face 15 of the nozzle holder 10 projects only slightly beyond the upper region 14 of the cylinder head 1. Above the nozzle holder 10, but below the camshaft 6, there is a clamping bracket 29, which is attached to the sealing cone on the end face 15 of the nozzle holder 10 with a ball socket 30 is supported and which is connected at one of its two ends to a flange 46 and can be clamped at its other free end by a clamping screw 31 to the nozzle holder 10. The flange 46 and thus also the clamping bracket 29 are supported in a receiving opening 28 of a web 26 at the edge of the cylinder head 1. Connected to the flange 46 is a single injection pump 47, the central axis of which runs approximately parallel to the longitudinal direction of the clamping bracket 29 at the level of the camshaft 6. A roller tappet 48 of the pump piston 49 is operatively connected to a cam of the camshaft 6. The single injection pump 47 is in on known manner connected to an electronically controlled solenoid valve 50, which relieves the pressure chamber 51 of the single injection pump 47 at the end of injection or at zero delivery. The pressure chamber 51 is connected to a channel 52 in the flange 46 directly to the pressure channel 33 in the clamping bracket 29 and thus to the injection nozzle 11. The leak oil bore 20 is connected via a leak oil bore 40 running in the clamping bracket 29 to a fuel supply line 53 which is at a low delivery pressure. A channel 54 in the flange 46 leads from the fuel supply line 53 to the pressure chamber 51, the mouth of this channel 54 in the pressure chamber 51 being passed over when the pump piston 49 is immersed, so that the required injection pressure can build up in the pressure chamber 51.

Bei der Montage wird der Flansch 46 zusammen mit der an ihm befestigten Einzeleinspritzpumpe 47 und dem Spannbügel 29 in geringer Schräglage in die Aufnahmeöffnung 28 eingeführt, so, daß der Kugelstutzen 30 am Spannbügel 29 über den Dichtkonus auf der Stirnseite 15 des Düsenhalters 10 gelangt. Diese Schräglage wird durch den elastischen Dichtring 32 ermöglicht, der den Flansch 46 gegenüber dem Steg 26 abdichtet. Danach kann der Flansch 46 gegenüber dem Steg 26 des Zylinderkopfes 1 mittels Flanschbefestigungsschrauben 55 festgelegt werden. Jetzt kann durch Anziehen der Spannschraube 31 der Kugelstutzen 30 des Spannbügels 29 auf die Stirnseite 15 des Düsenhalters 10 gepreßt werden, wobei sich der Spannbügel 29 über seine Länge biegeelastisch verformen wird. Der Spannbügel 29 wirkt so als Biegefeder und hält auch bei unterschiedlichen Wärmedehnungen von Düsenhalter 10 und Zylinderkopf 1 die Spannkraft auf den Düsenhalter 10 nahezu konstant.During assembly, the flange 46 is inserted together with the single injection pump 47 attached to it and the clamping bracket 29 into the receiving opening 28 at a slight incline, so that the ball socket 30 on the clamping bracket 29 passes over the sealing cone on the end face 15 of the nozzle holder 10. This inclined position is made possible by the elastic sealing ring 32, which seals the flange 46 with respect to the web 26. The flange 46 can then be fixed relative to the web 26 of the cylinder head 1 by means of flange fastening screws 55. Now, by tightening the clamping screw 31, the ball socket 30 of the clamping bracket 29 can be pressed onto the end face 15 of the nozzle holder 10, the clamping bracket 29 being deformed elastically over its length. The clamping bracket 29 thus acts as a spiral spring and keeps the clamping force on the nozzle holder 10 almost constant even with different thermal expansions of the nozzle holder 10 and cylinder head 1.

Mit einer derartigen Haltevorrichtung kann nicht nur eine geringe Motorbauhöhe erzielt werden, obwohl die Düsenhalter 10 direkt unterhalb der einzigen Nockenwelle 6 angeordnet sind, es können auch in unmittelbarer Nähe der Einspritzdüsen 11 angeordnete Einzeleinspritzpumpen 47 verwendet werden, die infolge ihrer Halterung die Motorbauhöhe nicht vergrößern. Die bei Einzeleinspritzpumpen bekannten Vorteile der kurzen Einspritzleitungen, die bei dem vorliegenden Ausführungsbeispiel lediglich aus dem Kanal 52 im Flansch 46, dem Druckkanal 33 im Spannbügel 29 und dem Druckkanal 17 im Düsenhalter 10 besteht, bleiben erhalten.With such a holding device, not only can a low engine height be achieved, although the nozzle holders 10 are arranged directly below the single camshaft 6, it can also be in the immediate vicinity of the Injection nozzles 11 arranged single injection pumps 47 are used, which due to their mounting do not increase the engine height. The advantages of the short injection lines known in the case of individual injection pumps, which in the present exemplary embodiment only consist of the channel 52 in the flange 46, the pressure channel 33 in the clamping bracket 29 and the pressure channel 17 in the nozzle holder 10, are retained.

Die Erfindung ist jedoch nicht auf das beschriebene Ausführungsbeispiel beschränkt. So kann der Spannbügel 29 in einer separaten Aufnahmeöffnung am Steg 26 des Zylinderkopfes 1 neben einer weiteren Flanschaufnahme im Steg 26 für die Einzeleinspritzpumpe 47 gehalten sein. Die separate Aufnahmeöffnung für den Spannbügel 29 kann auch im Flansch für die Befestigung der Einzeleinspritzpumpe 47 vorgesehen sein. Bei derartigen Ausführungen wird dann allerdings eine kurze zusätzliche Druckleitungsverbindung zwischen Einzeleinspritzpumpe und Spannbügel erforderlich.However, the invention is not restricted to the exemplary embodiment described. Thus, the clamping bracket 29 can be held in a separate receiving opening on the web 26 of the cylinder head 1 in addition to a further flange receptacle in the web 26 for the single injection pump 47. The separate receiving opening for the clamping bracket 29 can also be provided in the flange for fastening the single injection pump 47. In such designs, however, a short additional pressure line connection between the single injection pump and the clamping bracket is then required.

Claims (2)

Haltevorrichtung für ein Kraftstoffeinspritzventil eines Dieselmotors, bei der ein Düsenhalter (10) von oben her in eine im Zylinderkopf (1) des Dieselmotors befindlichen Kammer (9) eingesetzt, in dieser durch zylindrische Flächen zentriert und durch Spannmittel mit einem Dichtbund auf eine Dichtfläche (12) der Kammer (9) gepreßt ist und bei der eine von einer Kraftstoffeinspritzpumpe kommende Einspritzleitung (39) seitlich am Zylinderkopf (1) an den Düsenhalter (10) geführt ist, wobei sich der Düsenhalter (10) axial bis zu einem unterhalb einer Nockenwelle (6) quer zur Mittelachse des Düsenhalters (10) angeordneten Spannbügel (29) erstreckt, an seiner oberen Stirnseite (15) einen Dichtkonus aufweist, von dessen Zentrum aus ein Druckkanal (17) zu einer Einspritzdüse (11) führt und von dessen Randbereich eine Leckölbohrung (20) zu einem Leckölbereich führt, der Spannbügel (29) sich mit einem zwischen seinen Enden angeordneten Kugelstutzen (30) auf dem Dichtkonus des Düsenhalters (10), mit einem seiner Endbereiche in einer seitlich am Zylinderkopf (1) befindlichen Aufnahmeöffnung (28) und mit seinem anderen Endbereich über eine Spannschraube (31) am Zylinderkopf (1) abstützt, vom Zentrum des Kugelstutzens (30) ein Druckkanal (33) und vom Randbereich (21) des Kugelstutzens (30) eine Leckölbohrung (40) in den Bereich einer Stirnseite des Spannbügels (29) führen, der Randbereich zwischen Dichtkonus des Düsenhalters (10) und Kugelstutzens (30) des Spannbügels (29) nach außen hin durch eine elastische Dichtung begrenzt ist und im Bereich der Stirnseite des Spannbügels (29) der Druckkanal (33) mit der Einspritzleitung und die Leckölbohrung mit einer Sammelleitung verbunden sind nach Patentanmeldung P 43 18 434.0 sowie eine Halterung für eine auf ein so gehaltertes Kraftstoffeinspritzventil wirkende Einzeleinspritzpumpe, dadurch gekennzeichnet, daß die Einzeleinspritzpumpe (47) in Höhe der Nockenwelle (6) und mit ihrer Mittenachse im wesentlichen parallel zu jedem Spannbügel (29) verlaufend jeweils seitlich am Zylinderkopf (1) angeordnet und befestigt ist, deren Pumpenkolben (49) jeweils von einem Nocken der Nockenwelle (6) beaufschlagt und deren Druckraum (51) über einen Kanal (52) direkt mit dem Druckkanal (17) im Spannbügel (29) verbunden ist.Holding device for a fuel injection valve of a diesel engine, in which a nozzle holder (10) is inserted from above into a chamber (9) located in the cylinder head (1) of the diesel engine, centered in this by cylindrical surfaces and by means of clamping means with a sealing collar on a sealing surface (12 ) of the chamber (9) and in which an injection line (39) coming from a fuel injection pump is guided laterally on the cylinder head (1) to the nozzle holder (10), the nozzle holder (10) extending axially up to one below a camshaft ( 6) extends transversely to the central axis of the nozzle holder (10) arranged clamping bracket (29), on its upper end face (15) has a sealing cone, from the center of which a pressure channel (17) leads to an injection nozzle (11) and from its edge area a leak oil hole (20) leads to a leakage oil area, the clamping bracket (29) with a ball socket (30) arranged between its ends on the sealing cone of the nozzle support (10), with one of its end areas in a side opening on the cylinder head (1) receiving opening (28) and with its other end area via a clamping screw (31) on the cylinder head (1), from the center of the ball socket (30) a pressure channel ( 33) and from the edge area (21) of the ball socket (30) lead a leak oil hole (40) into the area of one end of the clamping bracket (29), the edge area between the sealing cone of the nozzle holder (10) and the ball socket (30) of the clamping bracket (29) is bounded on the outside by an elastic seal and in the area of the end face of the clamping bracket (29) the pressure channel (33) is connected to the injection line and the leakage oil hole is connected to a collecting line according to patent application P 43 18 434.0 and a holder for one on one Mounted fuel injection valve acting single injection pump, characterized in that the single injection pump (47) is arranged at the side of the cylinder head (1) at the level of the camshaft (6) and with its central axis essentially parallel to each clamping bracket (29), the pump piston ( 49) in each case acted upon by a cam of the camshaft (6) and the pressure chamber (51) of which is connected directly to the pressure channel (17) in the clamping bracket (29) via a channel (52). Haltevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse der Einzeleinspritzpumpe (47) und der Spannbügel (29) einen gemeinsamen Flansch (46) bilden, welcher seitlich am Zylinderkopf (1) befestigt ist, wobei der Spannbügel (29) gegenüber dem Flansch (46) und der an ihm befindlichen Einzeleinspritzpumpe (47) unter der Kraft der Spannschraube (31) biegeelastisch auf den Düsenhalter (10) hin verformbar ist.Holding device according to claim 1, characterized in that the housing of the single injection pump (47) and the clamping bracket (29) form a common flange (46) which is attached laterally to the cylinder head (1), the clamping bracket (29) opposite the flange ( 46) and the individual injection pump (47) located on it can be deformed under the force of the clamping screw (31) in a flexible manner towards the nozzle holder (10).
EP95102643A 1994-03-12 1995-02-24 Cylinder head assembly of a diesel engine with a holding device for a fuel injection valve as well as a holding device for an individual injection pump acting on that fuel injection valve Expired - Lifetime EP0671560B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4408385A DE4408385A1 (en) 1993-06-03 1994-03-12 Mounting for fuel injector valve of Diesel engine
DE4408385 1994-03-12

Publications (2)

Publication Number Publication Date
EP0671560A1 true EP0671560A1 (en) 1995-09-13
EP0671560B1 EP0671560B1 (en) 1998-04-08

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EP95102643A Expired - Lifetime EP0671560B1 (en) 1994-03-12 1995-02-24 Cylinder head assembly of a diesel engine with a holding device for a fuel injection valve as well as a holding device for an individual injection pump acting on that fuel injection valve

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EP (1) EP0671560B1 (en)
AT (1) ATE164919T1 (en)
ES (1) ES2116003T3 (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE445830C (en) * 1924-07-13 1927-06-18 Maschf Augsburg Nuernberg Ag Training and attachment of an injection nozzle with a central bore for airless injection, especially for vehicle engines
DE694245C (en) * 1935-04-11 1940-07-27 Junkers Flugzeug -und Motorenwerke Akt.-Ges. in Dessau. Arrangement of the injection pumps of internal combustion engines
DE703312C (en) * 1935-10-28 1941-03-06 Saurer Ag Adolph Device for fuel injection in injection internal combustion engines
US2354403A (en) * 1940-07-20 1944-07-25 Caterpillar Tractor Co Fuel injection system
FR2012144A1 (en) * 1968-07-02 1970-03-13 Tatra Np Podnik
DE2948407A1 (en) * 1979-12-01 1981-06-04 Daimler-Benz Ag, 7000 Stuttgart PUMP NOZZLE FOR COMBUSTION ENGINES COMBINED TO ONE BUILDING UNIT
GB2153908A (en) * 1984-02-04 1985-08-29 Lucas Ind Plc Clamping fuel injectors on I.C. engines
DE3728961A1 (en) * 1987-08-29 1989-03-09 Daimler Benz Ag Solenoid valve-controlled injection device comprising pump and nozzle, for multi-cylinder internal combustion engines
FR2670534A1 (en) * 1990-12-12 1992-06-19 Peugeot Device for fixing an injector
DE4318434A1 (en) * 1993-06-03 1994-12-08 Opel Adam Ag Holding device for a fuel injection valve of a diesel engine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE445830C (en) * 1924-07-13 1927-06-18 Maschf Augsburg Nuernberg Ag Training and attachment of an injection nozzle with a central bore for airless injection, especially for vehicle engines
DE694245C (en) * 1935-04-11 1940-07-27 Junkers Flugzeug -und Motorenwerke Akt.-Ges. in Dessau. Arrangement of the injection pumps of internal combustion engines
DE703312C (en) * 1935-10-28 1941-03-06 Saurer Ag Adolph Device for fuel injection in injection internal combustion engines
US2354403A (en) * 1940-07-20 1944-07-25 Caterpillar Tractor Co Fuel injection system
FR2012144A1 (en) * 1968-07-02 1970-03-13 Tatra Np Podnik
DE2948407A1 (en) * 1979-12-01 1981-06-04 Daimler-Benz Ag, 7000 Stuttgart PUMP NOZZLE FOR COMBUSTION ENGINES COMBINED TO ONE BUILDING UNIT
GB2153908A (en) * 1984-02-04 1985-08-29 Lucas Ind Plc Clamping fuel injectors on I.C. engines
DE3728961A1 (en) * 1987-08-29 1989-03-09 Daimler Benz Ag Solenoid valve-controlled injection device comprising pump and nozzle, for multi-cylinder internal combustion engines
FR2670534A1 (en) * 1990-12-12 1992-06-19 Peugeot Device for fixing an injector
DE4318434A1 (en) * 1993-06-03 1994-12-08 Opel Adam Ag Holding device for a fuel injection valve of a diesel engine

Also Published As

Publication number Publication date
ES2116003T3 (en) 1998-07-01
ATE164919T1 (en) 1998-04-15
EP0671560B1 (en) 1998-04-08

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