EP0533962B1 - Internal combustion engine with injection system - Google Patents
Internal combustion engine with injection system Download PDFInfo
- Publication number
- EP0533962B1 EP0533962B1 EP19910114136 EP91114136A EP0533962B1 EP 0533962 B1 EP0533962 B1 EP 0533962B1 EP 19910114136 EP19910114136 EP 19910114136 EP 91114136 A EP91114136 A EP 91114136A EP 0533962 B1 EP0533962 B1 EP 0533962B1
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- EP
- European Patent Office
- Prior art keywords
- pump
- combustion engine
- internal combustion
- thrust piece
- engine according
- 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.)
- Expired - Lifetime
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Classifications
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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
- 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
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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
- 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
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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
Definitions
- the invention relates to an internal combustion engine with an injection system according to the preamble of claim 1.
- Cylinder heads are known from US Pat. No. 3,845,748, in which the fuel is supplied to the injection valve via a line which is led through the cylinder head and is arranged in a pipe casing and is clamped to the injection valve by means of a pressure screw.
- a conical tip of the pipe end is received by a corresponding opening in the valve body.
- the other end of the line is connected to an injection pump, which is arranged approximately parallel to the valve.
- a connecting line between an injection valve and an injection pump is known, which consists of a tube and a subsequent line, which are clamped together. Due to the position of the injection pump to the valve, the exposed line coming from the pump is bent at right angles. Due to their low elasticity, these types of lines have the disadvantage that vibrations can often damage the pump or the valve, or due to the relatively freely movable arrangement of the line, a tight connection u # in the connection area of the line to the pipe is not completely guaranteed.
- the object of the invention is to provide a fuel line between an injection valve and an injection pump, which bridges deviations of the different connection points during assembly and allows elastic movements between the injection pump and cylinder head within limits, without leaks between the lines and to the injection nozzle and the pump .
- the fuel line comprises straight line parts which form tensionable pressure pieces and connect the injection pump to the injection valve.
- the tight connection of the pipelines with the units and with each other takes place in a structurally simple manner via a central clamping bolt in a receiving housing on the cylinder head.
- a certain elasticity or mobility of the two lines with respect to one another is achieved, as a result of which engine deformations and relative movements between the pump and the cylinder head can be compensated for without any sealing problems occurring can.
- the cylinder head takes over the introduction of force for connecting the lines to one another and to the injection valve and to the injection pump.
- Tolerance differences can be easily accommodated in the vertical and transverse directions by sliding on the flat sealing surfaces. Even in the transverse direction, these surfaces can be easily adapted to the injection valve, even by turning it slightly.
- the tolerance compensation in the transverse direction with regard to the meeting of the radial pressure piece and the cross pressure piece is achieved in that, in addition to the exact dimensional adjustment, both the adapter surface on the cross pressure piece is made very elastic, and the diameter design of the radial pressure piece outside the guide in the cylinder head in its cylindrical part towards the cross pressure piece is very great is designed to be elastic.
- the shape of the cylindrical receptacle housing preferably cast on to the cylinder head, is such that it when the radial pressure piece grows under the heat of the heavy oil, it can yield elastically as a tubular spring compared to the colder cylinder head.
- the pump-side receiving housing which holds the transverse pressure piece clamped, is designed as a tubular spring.
- the pressure and tensioning screws can also be shaped with suspension properties, such as, for example, by plate springs.
- An internal combustion engine comprises a cylinder head 1 with an integrated injection system, which essentially comprises an injection valve 2 and an injection pump 3. This is arranged directly adjacent to a receiving housing 4 cast onto the cylinder head 1, which has a receiving channel 5 for a line 7, which is led to the pump 3 and consists of a transverse pressure piece 6, and is held pre-tensioned in a pump housing 3a, 3b by means of a clamping screw 8.
- This cross-pressure piece 6 connects a further line 10, consisting of a radial pressure piece 9, to the injection valve 2 in the meeting corner area 11 of the two lines 7 and 10 and clamped together in a liquid-tight manner by means of the clamping screw 8.
- the pressure pieces 6 and 9 are arranged at right angles to one another, the radial pressure piece 9 being guided in a bore 12 in the cylinder head 1 up to the injection valve 2. It opens into the cast-on housing 4 with its free end 13 facing away from the valve 2. Starting from this housing 4, the transverse pressure piece 6 extends as far as the pump housing 3a, 3b in that its free end 13a is clamped against a pump element 16 by means of a pressure screw 15 .
- the receiving housing 4 is connected to the pump housing 3a, 3b via a sliding sleeve 17, through which the transverse pressure piece 6 also runs encapsulated.
- the radial thrust piece 9 has circumferentially spaced circumferential rings 18 which position it exactly in the bore 12, with an exact position of the thrust pieces 6 via the tension screw 8 arranged coaxially with this thrust piece 9 in cooperation with the pressure screw 15 in the pump housing 3a, 3b , 9 is set at right angles to each other.
- the line connection is made via flat sealing surfaces 19, 20, which are each aligned parallel to one another, e.g. is shown in more detail in Fig. 4.
- the sealing surfaces 21, 22 between the injection valve 2 and the radial pressure piece 9 and the sealing surfaces 23, 24 between the cross pressure piece 6 and the pump 3 are formed.
- the receptacle housing 4 and the pump housing 3b form so-called tubular springs which, due to their defined configuration as tubular elements in cross section, are elastically flexible within certain limits, in particular when the radial pressure piece 9 or the transverse pressure piece 6 is elongated.
- the lines 7 and 10 formed from the pressure pieces 6 and 9 are encapsulated by the pump 3 to the injection valve 2 either via the housing 3a, 3b, 4 and via the sliding sleeve 17 and via the bore 12 in the cylinder head 1, so that an exit from Medium is prevented from the outside.
- tensioning or pressure screws 8 and 15 tension the pressure pieces 6 and 9 over flat end faces 25, 26.
- ball elements which are not shown in more detail, can also be arranged in the end face of the screws 8 and 15, which are then directed towards the pressure pieces 6 and 9.
- connection of the transverse pressure piece 6 to the injection pump 3 can, as shown in FIGS. 2 and 3, be selected in various forms.
- a flat high-pressure seal is preferably also used here, but a hardened cone connection (cone 16a) is also conceivable.
- the housing 3a is preferably designed as a tubular spring. However, it can also get the pressure screw 15 assigned elastic properties.
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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
Die Erfindung bezieht sich auf eine Brennkraftmaschine mit einem Einspritzsystem nach dem Oberbegriff des Anspruchs 1.The invention relates to an internal combustion engine with an injection system according to the preamble of claim 1.
Es sind Zylinderköpfe aus der US-PS 3 845 748 bekannt, bei denen die Kraftstoffzufuhr zum Einspritzventil über eine durch den Zylinderkopf geführte Leitung erfolgt, die in einer Rohrverschalung angeordnet ist und mit dem Einspritzventil über eine Druckschraube verspannt wird. Hierbei wird eine kegelige Spitze des Rohrendes von einer entsprechenden Öffnung im Ventilkörper aufgenommen. Das andere Ende der Leitung ist mit einer Einspritzpumpe, die etwa parallel liegend zum Ventil angeordnet ist, verbunden. Desweiteren ist aus der DE-A 31 28 523 eine Verbindungsleitung zwischen einem Einspritzventil und einer Einspritzpumpe bekannt, die aus einem Rohr und einer anschließenden Leitung besteht, welche miteinander verspannt werden. Aufgrund der Lage der Einspritzpumpe zum Ventil ist die von der Pumpe abgehende freiliegende Leitung rechtwinklig abgebogen. Diese Art von Leitungen haben durch eine geringe Elastizität den Nachteil, daß Vibrationen häufig zu Beschädigungen der Pumpe bzw. des Ventils führen können bzw. durch die relativ freibewegliche Anordnung der Leitung ist eine dichte Verbindung u#im Anschlußbereich der Leitung zum Rohr nicht vollständig gewährleistet.Cylinder heads are known from US Pat. No. 3,845,748, in which the fuel is supplied to the injection valve via a line which is led through the cylinder head and is arranged in a pipe casing and is clamped to the injection valve by means of a pressure screw. Here, a conical tip of the pipe end is received by a corresponding opening in the valve body. The other end of the line is connected to an injection pump, which is arranged approximately parallel to the valve. Furthermore, from DE-A 31 28 523 a connecting line between an injection valve and an injection pump is known, which consists of a tube and a subsequent line, which are clamped together. Due to the position of the injection pump to the valve, the exposed line coming from the pump is bent at right angles. Due to their low elasticity, these types of lines have the disadvantage that vibrations can often damage the pump or the valve, or due to the relatively freely movable arrangement of the line, a tight connection u # in the connection area of the line to the pipe is not completely guaranteed.
Aufgabe der Erfindung ist es, eine Kraftstoffleitung zwischen einem Einspritzventil und einer Einspritzpumpe zu schaffen, die bei einer Montage Abweichungen der verschiedenen Anschlußpunkte überbrückt und elastische Bewegungen zwischen Einspritzpumpe und Zylinderkopf in Grenzen zuläßt, ohne daß Undichtigkeiten zwischen den Leitungen sowie zur Einspritzdüse und zur Pumpe auftreten.The object of the invention is to provide a fuel line between an injection valve and an injection pump, which bridges deviations of the different connection points during assembly and allows elastic movements between the injection pump and cylinder head within limits, without leaks between the lines and to the injection nozzle and the pump .
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Merkmale beinhalten die Unteransprüche.This object is achieved according to the invention by the characterizing features of claim 1. The dependent claims contain further advantageous features.
Die mit der Erfindung hauptsächlich erzielten Vorteile bestehen darin, daß die Kraftstoffleitung gerade Leitungsteile umfaßt, die spannbare Druckstücke bilden und die Einspritzpumpe mit dem Einspritzventil verbinden. Die dichte Verbindung der Rohrleitungen mit den Aggregaten und untereinander erfolgt in baulich einfacher Weise über einen zentralen Spannbolzen in einem Aufnahmegehäuse am Zylinderkopf. Hierdurch wird insbesondere aufgrund einer speziellen Verbindung zwischen den Leitungen und Aggregaten über planparallele Dichtflächen einerseits und planen bzw. kugelförmigen Druckelementen andererseits eine gewisse Elastizität bzw. Beweglichkeit der beiden Leitungen zueinander erzielt, wodurch Motordeformationen und Relativbewegungen zwischen Pumpe und Zylinderkopf ausgleichbar sind, ohne daß Dichtungsprobleme auftreten können.The main advantages achieved with the invention are that the fuel line comprises straight line parts which form tensionable pressure pieces and connect the injection pump to the injection valve. The tight connection of the pipelines with the units and with each other takes place in a structurally simple manner via a central clamping bolt in a receiving housing on the cylinder head. As a result, in particular due to a special connection between the lines and units via plane-parallel sealing surfaces on the one hand and planar or spherical pressure elements on the other hand, a certain elasticity or mobility of the two lines with respect to one another is achieved, as a result of which engine deformations and relative movements between the pump and the cylinder head can be compensated for without any sealing problems occurring can.
Der Zylinderkopf übernimmt durch die erfindungsgemäße Ausbildung und Anordnung der beiden Leitungen die Krafteinleitung für die Verbindung der Leitungen untereinander und mit dem Einspritzventil und mit der Einspritzpumpe.Due to the design and arrangement of the two lines according to the invention, the cylinder head takes over the introduction of force for connecting the lines to one another and to the injection valve and to the injection pump.
Es hat sich als vorteilhaft herausgestellt, daß bei Höchstdruckverbindungen ebene Dichtflächen erforderlich sind. Diese haben genau auf die Druckkräfte ausgelegte Ringflächen, die zwar ein geringfügiges elastoplastisches Deformieren gestatten, aber unter den notwendigen Vorspannkräften ein Setzen im größeren Maße nicht aufweisen. Um diese ebenen Dichtflächen gezielt einzusetzen, muß darauf geachtet werden, daß diese Flächen im Montagezustand so planparallel wie möglich aufeinander treffen können. Aus diesem Grund wird das Radialdruckstück im Zylinderkopf genau geführt, um seine rechtwinklige Lage gegenüber der Achse des Einspritzventils im Zylinderkopf zu erzwingen. Ebenso wird die Länge des Radialdruckstückes gegenüber der Einspritzpumpe so bestimmt, daß das Querdruckstück exakt rechtwinklig zum Radialdruckstück verläuft. Toleranzunterschiede können in Hoch- und Querrichtung durch Rutschen auf den ebenen Dichtflächen ohne weiteres aufgenommen werden. Auch in Querrichtung ist am Einspritzventil selbst durch leichtes Drehen desselben eine Anpassung dieser Flächen ohne weiteres möglich. Der Toleranzausgleich in Querrichtung bezüglich des Zusammentreffens von Radialdruckstück und Querdruckstück wird dadurch erzielt, daß neben der exakten maßlichen Abstimmung sowohl die Anpaßfläche am Querdruckstück sehr elastisch ausgeführt wird, als auch die Durchmessergestaltung des Radialdruckstückes außerhalb der Führung im Zylinderkopf in seinem zylindrischen Teil zum Querdruckstück hin sehr elastisch gestaltet wird.It has been found to be advantageous that flat sealing surfaces are required for high-pressure connections. These have ring surfaces designed precisely for the compressive forces, which, although they allow a slight elastoplastic deformation, do not show any greater setting under the necessary prestressing forces. In order to use these flat sealing surfaces in a targeted manner, care must be taken that these surfaces can meet each other as plane-parallel as possible in the assembled state. For this reason, the radial pressure piece is precisely guided in the cylinder head in order to force it to be at right angles to the axis of the injection valve in the cylinder head. Likewise, the length of the radial pressure piece relative to the injection pump is determined in such a way that the transverse pressure piece runs exactly at right angles to the radial pressure piece. Tolerance differences can be easily accommodated in the vertical and transverse directions by sliding on the flat sealing surfaces. Even in the transverse direction, these surfaces can be easily adapted to the injection valve, even by turning it slightly. The tolerance compensation in the transverse direction with regard to the meeting of the radial pressure piece and the cross pressure piece is achieved in that, in addition to the exact dimensional adjustment, both the adapter surface on the cross pressure piece is made very elastic, and the diameter design of the radial pressure piece outside the guide in the cylinder head in its cylindrical part towards the cross pressure piece is very great is designed to be elastic.
Gegenüber den im Motorbetrieb auftretenden low-cycle and high-cycle-Beanspruchungen ist in den Radialdruckstücken und im Querdruckstück eine hinreichende Elastizität zum gegenseitigen Anpassen gegeben. Das vorzugsweise am Zylinderkopf angegossene zylinderförmige Aufnahmegehäuse ist in seiner Form so gestaltet, daß es beim Wachsen des Radialdruckstücks unter der Wärme des Schweröls gegenüber dem kälteren Zylinderkopf als Rohrfeder elastisch nachgeben kann. Ebenfalls ist aus diesem Grund das pumpenseitige Aufnahmegehäuse, welches das Querdruckstück eingespannt hält, als Rohrfeder ausgeführt. In besonderer Ausgestaltung der Erfindung können aber auch die Druck- und Spannschrauben mit Federungseigenschaften, wie z.B. durch Tellerfedern, geprägt sein.Compared to the low-cycle and high-cycle stresses that occur during engine operation, there is sufficient elasticity in the radial pressure pieces and in the transverse pressure piece for mutual adaptation. The shape of the cylindrical receptacle housing, preferably cast on to the cylinder head, is such that it when the radial pressure piece grows under the heat of the heavy oil, it can yield elastically as a tubular spring compared to the colder cylinder head. For this reason, too, the pump-side receiving housing, which holds the transverse pressure piece clamped, is designed as a tubular spring. In a special embodiment of the invention, however, the pressure and tensioning screws can also be shaped with suspension properties, such as, for example, by plate springs.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:
- Fig. 1
- eine Ansicht auf die als Radial- und Querdruckstück ausgebildete Verbindungsleitung zwischen Pumpe und Einspritzventil,
- Fig. 2
- eine vergrößerte Darstellung einer Spannverbindung des Querdruckstücks durch eine Druckschraube an einer Pumpe mit planen Dicht- und Preßflächen,
- Fig. 3
- eine vergrößerte Darstellung der Verbindung zwischen der Pumpe mit Konusaufnahme am Querdruckstück,
- Fig. 4
- eine Darstellung des Radialdruckstücks mit Verbindung zum Querdruckstück,
- Fig. 5
- eine Darstellung des als Rohrfeder ausgebildeten pumpenseitigen Aufnahmegehäuses und
- Fig. 6
- eine Draufsicht zu Fig. 5.
- Fig. 1
- 1 shows a view of the connecting line between the pump and the injection valve, which is designed as a radial and transverse pressure piece,
- Fig. 2
- an enlarged view of a clamping connection of the cross pressure piece by a pressure screw on a pump with flat sealing and pressing surfaces,
- Fig. 3
- an enlarged view of the connection between the pump with cone mount on the cross pressure piece,
- Fig. 4
- a representation of the radial pressure piece with connection to the transverse pressure piece,
- Fig. 5
- a representation of the pump-side receiving housing designed as a tubular spring and
- Fig. 6
- 5 shows a top view of FIG. 5.
Eine Brennkraftmaschine umfaßt einen Zylinderkopf 1 mit einem integrierten Einspritzsystem, das im wesentlichen ein Einspritzventil 2 und eine Einspritzpumpe 3 umfaßt. Diese ist unmittelbar benachbart eines am Zylinderkopf 1 angegossenen Aufnahmegehäuses 4 angeordnet, das einen Aufnahmekanal 5 für eine zur Pumpe 3 geführte, aus einem Querdruckstück 6 bestehende Leitung 7 aufweist und in einem Pumpengehäuse 3a,3b mittels einer Spannschraube 8 vorgespannt gehalten ist. Mit diesem Querdruckstück 6 ist eine zum Einspritzventil 2 geführte weitere, aus einem Radialdruckstück 9 bestehende Leitung 10 im zusammentreffenden Eckbereich 11 der beiden Leitungen 7 und 10 verbunden und über die Spannschraube 8 flüssigkeitsdicht zusammengespannt.An internal combustion engine comprises a cylinder head 1 with an integrated injection system, which essentially comprises an
Die Druckstücke 6 und 9 sind rechtwinklig zueinander angeordnet, wobei das Radialdruckstück 9 in einer Bohrung 12 des Zylinderkopfes 1 bis zum Einspritzventil 2 geführt ist. Es mündet mit seinem dem Ventil 2 abgekehrten freien Ende 13 in das angegossene Gehäuse 4. Ausgehend von diesem Gehäuse 4 verläuft das Querdruckstück 6 bis zum Pumpengehäuse 3a,3b, indem es mit seinem freien Ende 13a über eine Druckschraube 15 gegen ein Pumpenelement 16 gespannt ist. Das Aufnahmegehäuse 4 ist mit dem Pumpengehäuse 3a,3b über eine Schiebehülse 17 verbunden, durch das auch das Querdruckstück 6 gekapselt verläuft.The
Das Radialdruckstück 9 weist am Umfang im Abstand angeordnete Umfangsringe 18 auf, die es in der Bohrung 12 exakt positionieren, wobei über die koaxial zu diesem Druckstück 9 angeordnete Spannschraube 8 im Zusammenwirken mit der Druckschraube 15 im Pumpengehäuse 3a,3b eine genaue Lage der Druckstücke 6,9 im rechten Winkel zueinander festgelegt ist.The radial thrust piece 9 has circumferentially spaced
Die Leitungsverbindung erfolgt über plane Dichtflächen 19,20, die jeweils parallel zueinander ausgerichtet sind, wie z.B. in Fig. 4 näher dargestellt ist. Ebenso sind die Dichtflächen 21,22 zwischen Einspritzventil 2 und Radialdruckstück 9 und die Dichtflächen 23,24 zwischen dem Querdruckstück 6 und der Pumpe 3 ausgebildet.The line connection is made via
Das Aufnahmegehäuse 4 sowie das Pumpengehäuse 3b bilden sogenannte Rohrfedern, die aufgrund ihrer definierten Ausbildung als im Querschnitt rohrförmige Elemente, in gewissen Grenzen elastisch nachgiebig sind, insbesondere bei einer Längung des Radialdruckstückes 9 bzw. des Querdruckstückes 6.The receptacle housing 4 and the
Die aus den Druckstücken 6 und 9 gebildeten Leitungen 7 und 10 sind von der Pumpe 3 bis zum Einspritzventil 2 entweder über die Gehäuse 3a,3b,4 und über die Schiebehülse 17 sowie über die Bohrung 12 im Zylinderkopf 1 gekapselt, so daß ein Austritt von Medium nach außen unterbunden wird.The
Die Spann- bzw. Druckschrauben 8 und 15 spannen die Druckstücke 6 und 9 über plane Stirnflächen 25,26. Nach einer weiteren Ausführung können in der Stirnfläche der Schraube 8 und 15 auch Kugelelemente, was nicht näher gezeigt ist, angeordnet sein, die dann dem Druckstück 6 und 9 zugerichtet sind.The tensioning or
Der Anschluß des Querdruckstücks 6 an der Einspritzpumpe 3 kann, wie in Fig. 2 und 3 näher dargestellt ist, in verschiedenen Formen gewählt werden. Vorzugsweise wird auch hier eine ebene Hochdruckdichtung eingesetzt, es ist aber auch eine gehärtete Konusverbindung (Konus 16a) vorstellbar. Auch hier ist das Gehäuse 3a vorzugsweise als Rohrfeder gestaltet. Es kann jedoch auch die Druckschraube 15 elastische Eigenschaften zugeordnet bekommen.The connection of the
Claims (12)
- Internal combustion engine having an injection system comprising an injection pump and an injection valve, the injection pump being mounted separately from the injection valve and being connected via a fuel line to the injection valve in the cylinder head and said line being held with the aid of connection pieces on the valve and on the injection pump, characterized in that the fuel line comprises two lines (7, 10) made up of straight thrust pieces (6, 9) and disposed at right angles to one another, the transverse thrust piece (6) which is connected to the pump (3) being connected, in the corner region (11) where it meets the radial thrust piece (9) connected to the injection valve, via a plane sealing surface (19) to the radial thrust piece (9) disposed in the cylinder head (1) with the aid of a corresponding parallel sealing surface (20), the transverse thrust piece (6) and the radial thrust piece (9) being held together by means of a clamping screw (8) in a location housing (4) cast onto the cylinder head (1) and the transverse thrust piece (6) being conveyed to the adjacent pump (3) in a sliding sleeve (17) between a pump housing (3a, 3b) and the location housing (4), and that the two housings (4, 3a, 3b) take the form of Bourdon springs which hold the thrust pieces (6, 9) in an elastically resilient manner.
- Internal combustion engine according to claim 1, characterized in that the location housing (4) cast on the cylinder head (1) and the pump housing (3a, 3b) are tubular in cross-section and the walls of the housings (4, 3a, 3b) comprise elastic walls of a defined construction.
- Internal combustion engine according to claim 1, characterized in that the sliding sleeve (17) is disposed so as to be tightly connected to the location housing (4) and to the pump housing (3a, 3b) and forms a covering for the transverse thrust piece (6).
- Internal combustion engine according to one of claims 1 to 3, characterized in that the lines (7, 10) comprising the radial thrust piece (9) and the transverse thrust piece (6) are disposed from the pump (3) to the injection valve (2) enclosed in an encapsulated manner in the cylinder head (1) via the location housing (4), the sliding sleeve (17) and through the pump housing (3a, 3b).
- Internal combustion engine according to one of claims 1 to 4, characterized in that the clamping screw (8) is disposed in the corner region (11) coaxially to the radial thrust piece (9) and the free end (13b) of the transverse thrust piece (6) is held clamped between the clamping screw (8) and the radial thrust piece (9).
- Internal combustion engine according to one of claims 1 to 5, characterized in that a pressing screw (15) at the housing (3a, 3b) of the injection pump (3) lies radially opposite the end connection piece of the transverse thrust piece (6) at the free end (13a) and said free end (13a) is held clamped between the pressing screw (15) and a cone (16a) of the pump (3).
- Internal combustion engine according to claim 6, characterized in that a spherical element made of a wear-resistant material is disposed between the pressing screw (15) or the clamping screw (8) and the respective connection piece at the free end (13a, 13b) of the transverse thrust piece (6).
- Internal combustion engine according to one of claims 1 to 7, characterized in that the plane sealing surfaces (19, 20, 21, 22, 23, 24) have defined elastoplastic annular surfaces in the connection area of the thrust pieces (6, 9) to one another as well as to the pump (3) and the injection valve (2).
- Internal combustion engine according to one of claims 1 to 8, characterized in that the radial thrust piece (9) is held centred in a bore (12) of the cylinder head (1) by means of spaced-apart, raised peripheral rings (18).
- Internal combustion engine according to claim 9, characterized in that at least the peripheral ring (18) adjacent to the injection valve is of an elastic construction.
- Internal combustion engine according to claim 6, characterized in that the clamping and pressing screws (8, 15) are of an elastic construction in an axial direction.
- Internal combustion engine according to claim 6 or 11, characterized in that cup springs are disposed between the screws (8, 15) and the thrust pieces (6, 9) to provide elastic axial compliance.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904016190 DE4016190C2 (en) | 1990-05-19 | 1990-05-19 | Internal combustion engine with an injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0533962A1 EP0533962A1 (en) | 1993-03-31 |
| EP0533962B1 true EP0533962B1 (en) | 1994-04-06 |
Family
ID=6406806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19910114136 Expired - Lifetime EP0533962B1 (en) | 1990-05-19 | 1991-08-23 | Internal combustion engine with injection system |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0533962B1 (en) |
| DE (1) | DE4016190C2 (en) |
| DK (1) | DK0533962T3 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1937444C3 (en) * | 1969-07-23 | 1974-03-21 | Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | Fuel line connections that can be produced by plug connections on a pump nozzle unit provided for each cylinder of an internal combustion engine |
| US3845748A (en) * | 1972-09-29 | 1974-11-05 | Mack Trucks | Fuel injection nozzle holder installation |
| DE3128523A1 (en) * | 1981-07-18 | 1983-02-03 | Motoren-Werke Mannheim AG vorm. Benz Abt. stationärer Motorenbau, 6800 Mannheim | Cylinder head for an internal combustion engine |
| US4485790A (en) * | 1982-04-19 | 1984-12-04 | Yanmar Diesel Engine Company Limited | Holding construction of a fuel injection valve in an internal combustion engine |
| JPH0533832Y2 (en) * | 1987-06-29 | 1993-08-27 | ||
| JPH03177694A (en) * | 1989-09-27 | 1991-08-01 | Usui Internatl Ind Co Ltd | Branch connected body connecting structure in high pressure fuel rail |
-
1990
- 1990-05-19 DE DE19904016190 patent/DE4016190C2/en not_active Expired - Lifetime
-
1991
- 1991-08-23 EP EP19910114136 patent/EP0533962B1/en not_active Expired - Lifetime
- 1991-08-23 DK DK91114136T patent/DK0533962T3/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE4016190A1 (en) | 1991-11-21 |
| DK0533962T3 (en) | 1994-08-22 |
| EP0533962A1 (en) | 1993-03-31 |
| DE4016190C2 (en) | 1998-08-13 |
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