EP1262652B1 - Cylinder head with injector - Google Patents

Cylinder head with injector Download PDF

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Publication number
EP1262652B1
EP1262652B1 EP20020100564 EP02100564A EP1262652B1 EP 1262652 B1 EP1262652 B1 EP 1262652B1 EP 20020100564 EP20020100564 EP 20020100564 EP 02100564 A EP02100564 A EP 02100564A EP 1262652 B1 EP1262652 B1 EP 1262652B1
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EP
European Patent Office
Prior art keywords
injector
cylinder head
clamping claw
clamping
damping element
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 - Fee Related
Application number
EP20020100564
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German (de)
French (fr)
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EP1262652A2 (en
EP1262652A3 (en
Inventor
Wendelin KLÜGL
Heinz Lixl
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Siemens AG
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Siemens AG
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Publication of EP1262652A3 publication Critical patent/EP1262652A3/en
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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
    • 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or 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
    • F02M2200/09—Fuel-injection apparatus having means for reducing noise
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws

Definitions

  • the invention relates to a cylinder head and an injector mounted thereon, as used in automotive technology.
  • accumulator injection systems are increasingly being used in which very high injection pressures and fast switching speeds are used.
  • fuel is conveyed by means of a high pressure pump in a high-pressure accumulator, from which the fuel is injected by means of injectors in the internal combustion engine.
  • the injector is actuated by an electrically actuated actuator, with the use of piezoelectric actuators in particular has been found to achieve sufficiently short switching times to be advantageous.
  • the extremely fast-switching actuators with switching times in the range of less than 200 microseconds give their high-frequency mechanical vibrations to the surrounding injector housing of the injector. These vibrations then propagate along the injector housing and are directed into the cylinder head of the engine. On the surface of the injector housing and the cylinder head, these mechanical vibrations lead to significant noise that adversely affect ride comfort.
  • US 4327690 discloses a cylinder head and injector mounted thereon, wherein means is provided for clamping by which the injector is biased against the cylinder head at at least one port, with an elastic seal disposed at the interface between the injector and the cylinder head.
  • the invention has for its object to provide a cylinder head and an injector mounted thereon with a low noise emission, with which the above-mentioned disadvantages can be avoided.
  • a cylinder head and an injector mounted thereon with the following features: It is provided a means for clamping, through which the injector is stretched at least one connection point against the cylinder head.
  • a first damping element is arranged which consists essentially of one of the materials graphite, polyformaldehyde, polytetrafluoroethylene, memory metal.
  • the transmission of structure-borne noise from the injector to the cylinder head is strongly damped, so that the airborne sound radiation of the cylinder head is also strongly attenuated.
  • the material of the first damping element must be sound-damping and at the same time be resistant to pressure, as is pressed at the junction by the means for tensioning the injector against the cylinder head with a high force, which is usually between 4 and 12 kN.
  • a flow of the materials mentioned at high power can be well avoided especially in positive connection by means of carrier material.
  • a memory metal is, for example, AlCu titanate.
  • the thickness of the first damping element is about 1/10 mm to 10 mm.
  • the cylinder head has an opening for a combustion chamber.
  • the injector is inserted into the opening in such a way that the nozzle of the injector is directed towards the combustion chamber.
  • the cylinder head has within the opening on a shoulder which forms the connection point and against which the injector is stretched.
  • the first damping element is arranged between the shoulder of the cylinder head and the injector.
  • the first damping element is configured, for example, disc-shaped.
  • the means for tensioning may be attached to the injector and the cylinder head.
  • a further damping element is arranged, which consists essentially of one of the materials graphite, polyformaldehyde, polytetrafluoroethylene, memory metal. Also applies to the further damping element that it should act both sound-absorbing and should be resistant to high pressures.
  • the means for tensioning the injector but not attached to the cylinder head.
  • the means for clamping is attached to another component to which a force can be applied by which the injector can be clamped against the cylinder head.
  • the means for tensioning may comprise a clamping claw.
  • An upper part of the injector, which protrudes from the opening, in this case is covered by the clamping claw.
  • the upper part of the injector has a shoulder against which the clamping claw presses downwards.
  • the means for clamping may comprise a connecting means by which the clamping claw is attached to the cylinder head and with which the distance between the clamping claw and the cylinder head can be adjusted. With the help of the connecting means, the distance between the clamping claw and the cylinder head and thus the force with which the injector is stretched on the cylinder head can be adjusted.
  • a second damping element is arranged between the shoulder of the upper part of the injector and the clamping claw as a further damping element.
  • a fourth damping element is arranged between the clamping claw and the cylinder head as a further damping element. Since the fourth damping element does not have to enclose a component, it does not require a recess and can be designed, for example, in the shape of a cylinder or a cuboid.
  • the connecting means may be configured as a screw which is guided through an opening in the clamping claw.
  • the head of the screw is placed over the clamping claw and presses down against the clamping claw.
  • the thread of the screw is screwed into the cylinder head.
  • a third damping element is preferably arranged, which consists of one of the materials from which the first damping element may consist.
  • the figure shows a cross section through a part of a cylinder head and an injector mounted thereon with a a first opening, a second opening, a first damping element, a second damping element, a third damping element, a fourth damping element, a screw, a clamping claw, a first shoulder and a second shoulder.
  • a cylinder head Z which has a first opening O1, in which a lower part of an injector I is inserted (see figure).
  • the cylinder head Z has, within the first opening O1, a first shoulder A1, against which the injector I is tensioned.
  • the first damping element D1 is disc-shaped and has a thickness of about 1/10 mm.
  • a clamping claw S is provided, which comprises an upper part of the injector I, which protrudes from the first opening O1 of the cylinder head Z.
  • the upper part of the injector I has a second step A2, against which the clamping claw S presses downwards.
  • a second disc-shaped damping element D2 made of graphite with a thickness of about 1/10 mm is arranged.
  • the clamping claw S has a second opening O2, through which a screw SB is guided, whose head is arranged above the clamping claw S, and whose thread is screwed into the cylinder head Z. Between the head of the screw SB and the clamping claw S, a third disc-shaped damping element D3 made of graphite with a thickness of about 1/10 mm is arranged. By turning the screw SB, the distance between the clamping claw S and the cylinder head Z can be adjusted. This distance in turn determines the Force with which the injector I is tensioned against the cylinder head Z by the clamping claw S.
  • a fourth damping element D4 made of graphite with a thickness of about 1/10 mm is arranged between the clamping claw S and the cylinder head Z.
  • the fourth damping element D4 has the shape of a cylinder.

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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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

Die Erfindung betrifft einen Zylinderkopf und einen daran montierten Injektor, wie sie in der Automobiltechnik Verwendung finden.The invention relates to a cylinder head and an injector mounted thereon, as used in automotive technology.

Zur Kraftstoffversorgung von Brennkraftmaschinen werden zunehmend Speichereinspritzsysteme eingesetzt, bei denen mit sehr hohen Einspritzdrücken und schnellen Schaltgeschwindigkeiten gearbeitet wird. Bei diesen Speichereinspritzsystemen wird Kraftstoff mittels einer Hochdruckpumpe in einen Hochdruckspeicher gefördert, von dem aus der Kraftstoff mit Hilfe von Injektoren in die Brennkraftmaschine eingespritzt wird. Der Injektor wird dabei von einem elektrisch angesteuerten Aktor betätigt, wobei sich vor allem der Einsatz von piezoelektrischen Aktoren zum Erzielen ausreichend kurzer Schaltzeiten als vorteilhaft erwiesen hat.For fuel supply of internal combustion engines, accumulator injection systems are increasingly being used in which very high injection pressures and fast switching speeds are used. In these accumulator injection systems fuel is conveyed by means of a high pressure pump in a high-pressure accumulator, from which the fuel is injected by means of injectors in the internal combustion engine. The injector is actuated by an electrically actuated actuator, with the use of piezoelectric actuators in particular has been found to achieve sufficiently short switching times to be advantageous.

Insbesondere die extrem schnell schaltenden Aktoren mit Schaltzeiten im Bereich von unter 200 Mikrosekunden geben jedoch ihre hochfrequenten mechanischen Schwingungen an das umgebende Injektorgehäuse des Injektors ab. Diese Schwingungen pflanzen sich dann entlang des Injektorgehäuses fort und werden in den Zylinderkopf der Brennkraftmaschine geleitet. Auf der Oberfläche des Injektorgehäuses und des Zylinderkopfes führen diese mechanischen Schwingungen zu erheblichen Störgeräuschen, die den Fahrkomfort negativ beeinflussen.In particular, the extremely fast-switching actuators with switching times in the range of less than 200 microseconds, however, give their high-frequency mechanical vibrations to the surrounding injector housing of the injector. These vibrations then propagate along the injector housing and are directed into the cylinder head of the engine. On the surface of the injector housing and the cylinder head, these mechanical vibrations lead to significant noise that adversely affect ride comfort.

Die US 4327 690 offenbart einen Zylinderkopf und daran montierter Injektor, wobei ein Mittel zum Spannen vorgesehen ist, durch das der Injektor an mindestens einer Anschlußstelle gegen den Zylinderkopf gespannt ist, wobei an der Anschlußstelle zwischen dem Injektor und dem Zylinderkopf eine elastische Dichtung angeordnet ist.US 4327690 discloses a cylinder head and injector mounted thereon, wherein means is provided for clamping by which the injector is biased against the cylinder head at at least one port, with an elastic seal disposed at the interface between the injector and the cylinder head.

Zur Verringerung der Geräuschemission wurde bereits vorgeschlagen, reduzierte Energie bei der Bestromung des piezoelektrischen Aktors zu verwenden, und aufeinander abgestimmte Spritzbeginne durchzuführen. Dieser Lösungsansatz reduziert die Geräuschemission jedoch nur ungenügend.To reduce the noise emission has already been proposed to use reduced energy in the energization of the piezoelectric actuator, and perform coordinated injection starts. However, this approach only insufficiently reduces the noise emission.

Ferner ist bereits vorgeschlagen worden, den piezoelektrischen Aktor mit einer Abdeckhaube zu versehen. Dieser Lösungsansatz erfordert jedoch eine aufwendige Montage. Darüber hinaus vergrößert sich das Volumen des Injektors durch die Abdeckhaube.Furthermore, it has already been proposed to provide the piezoelectric actuator with a cover. However, this approach requires a complex assembly. In addition, the volume of the injector increases through the cover.

Der Erfindung liegt die Aufgabe zugrunde, einen Zylinderkopf und einen daran montierten Injektor mit einer geringen Geräuschemission anzugeben, mit denen die oben genannten Nachteile vermieden werden können.The invention has for its object to provide a cylinder head and an injector mounted thereon with a low noise emission, with which the above-mentioned disadvantages can be avoided.

Die Aufgabe wird gelöst durch einen Zylinderkopf und einen daran montierten Injektor mit folgenden Merkmalen: Es ist ein Mittel zum Spannen vorgesehen, durch das der Injektor an mindestens einer Anschlußstelle gegen den Zylinderkopf gespannt ist. An der Anschlußstelle zwischen dem Injektor und dem Zylinderkopf ist ein erstes Dämpfungselement angeordnet das im wesentlichen aus einem der Materialien Graphit, Polyformaldehyd, Polytetrafluorethylen, Memorymetall besteht.The object is achieved by a cylinder head and an injector mounted thereon with the following features: It is provided a means for clamping, through which the injector is stretched at least one connection point against the cylinder head. At the junction between the injector and the cylinder head, a first damping element is arranged which consists essentially of one of the materials graphite, polyformaldehyde, polytetrafluoroethylene, memory metal.

Durch das erste Dämpfungselement wird die Übertragung von Körperschall vom Injektor auf den Zylinderkopf stark gedämpft, so dass die Luftschallabstrahlung des Zylinderkopfs ebenfalls stark gedämpft wird.By the first damping element, the transmission of structure-borne noise from the injector to the cylinder head is strongly damped, so that the airborne sound radiation of the cylinder head is also strongly attenuated.

Das Material des ersten Dämpfungselements muss schalldämpfend wirken und zugleich gegen Druck resistent sein, da an der Anschlussstelle durch das Mittel zum Spannen der Injektor gegen den Zylinderkopf mit einer hohen Kraft, die in Regel zwischen 4 und 12 kN beträgt, gedrückt wird.The material of the first damping element must be sound-damping and at the same time be resistant to pressure, as is pressed at the junction by the means for tensioning the injector against the cylinder head with a high force, which is usually between 4 and 12 kN.

Es hat sich gezeigt, dass Graphit, Polyformaldehyd, Polytetrafluorethylen und Memorymetalle geeignete Materialien für das erste Dämpfungselement sind.It has been found that graphite, polyformaldehyde, polytetrafluoroethylene and memory metals are suitable materials for the first damping element.

Ein Verfließen der genannten Materialien bei hoher Kraft lässt sich besonders bei formschlüssiger Verbindung mittels Trägermaterial gut vermeiden.A flow of the materials mentioned at high power can be well avoided especially in positive connection by means of carrier material.

Ein Memorymetall ist beispielsweise AlCu-Titanat.A memory metal is, for example, AlCu titanate.

Vorzugsweise beträgt die Dicke des ersten Dämpfungselements etwa 1/10 mm bis 10mm.Preferably, the thickness of the first damping element is about 1/10 mm to 10 mm.

In der Regel weist der Zylinderkopf eine Öffnung für einem Brennraum auf. Der Injektor ist derart in die Öffnung eingeschoben, dass die Düse des Injektors zum Brennraum hin gerichtet ist. Der Zylinderkopf weist innerhalb der Öffnung einen Absatz auf, der die Anschlußstelle bildet und gegen den der Injektor gespannt ist. Vorzugsweise ist zwischen dem Absatz des Zylinderkopfes und dem Injektor das erste Dämpfungselement angeordnet. Das erste Dämpfungselement ist beispielsweise scheibenförmig ausgestaltet.As a rule, the cylinder head has an opening for a combustion chamber. The injector is inserted into the opening in such a way that the nozzle of the injector is directed towards the combustion chamber. The cylinder head has within the opening on a shoulder which forms the connection point and against which the injector is stretched. Preferably, the first damping element is arranged between the shoulder of the cylinder head and the injector. The first damping element is configured, for example, disc-shaped.

Das Mittel zum Spannen kann am Injektor und am Zylinderkopf befestigt sein. In diesem Fall ist zwischen dem Mittel zum Spannen und dem Injektor und/oder zwischen dem Mittel zum Spannen und dem Zylinderkopf ein weiteres Dämpfungselement angeordnet, das im wesentlichen aus einem der Materialien Graphit, Polyformaldehyd, Polytetrafluorethylen, Memorymetall besteht. Auch für das weitere Dämpfungselement gilt, daß es sowohl schalldämmend wirken sollte als auch gegen hohe Drücke resistent sein sollte.The means for tensioning may be attached to the injector and the cylinder head. In this case, between the means for clamping and the injector and / or between the means for clamping and the cylinder head, a further damping element is arranged, which consists essentially of one of the materials graphite, polyformaldehyde, polytetrafluoroethylene, memory metal. Also applies to the further damping element that it should act both sound-absorbing and should be resistant to high pressures.

Alternativ ist das Mittel zum Spannen zwar am Injektor jedoch nicht am Zylinderkopf befestigt. Statt dessen ist das Mittel zum Spannen an einem anderen Bauteil befestigt, an dem eine Kraft angesetzt werden kann, durch die der Injektor gegen den Zylinderkopf gespannt werden kann.Alternatively, the means for tensioning the injector but not attached to the cylinder head. Instead, the means for clamping is attached to another component to which a force can be applied by which the injector can be clamped against the cylinder head.

Das Mittel zum Spannen kann eine Spannpratze aufweisen. Ein oberer Teil des Injektors, der aus der Öffnung herausragt, wird in diesem Fall von der Spannpratze umfasst. Der obere Teil des Injektors weist einen Absatz auf, gegen den die Spannpratze nach unten drückt. Das Mittel zum Spannen kann ein Verbindungsmittel aufweisen, durch das die Spannpratze am Zylinderkopf befestigt wird und mit dem der Abstand zwischen der Spannpratze und dem Zylinderkopf verstellt werden kann. Mit Hilfe des Verbindungsmittels kann der Abstand zwischen der Spannpratze und dem Zylinderkopf und damit die Kraft, mit der der Injektor auf den Zylinderkopf gespannt ist, eingestellt werden.The means for tensioning may comprise a clamping claw. An upper part of the injector, which protrudes from the opening, in this case is covered by the clamping claw. The upper part of the injector has a shoulder against which the clamping claw presses downwards. The means for clamping may comprise a connecting means by which the clamping claw is attached to the cylinder head and with which the distance between the clamping claw and the cylinder head can be adjusted. With the help of the connecting means, the distance between the clamping claw and the cylinder head and thus the force with which the injector is stretched on the cylinder head can be adjusted.

Vorzugsweise ist zwischen dem Absatz des oberen Teils des Injektors und der Spannpratze als weiteres Dämpfungselement ein zweites Dämpfungselement angeordnet.Preferably, a second damping element is arranged between the shoulder of the upper part of the injector and the clamping claw as a further damping element.

Vorzugsweise ist zwischen der Spannpratze und dem Zylinderkopf als weiteres Dämpfungselement ein viertes Dämpfungselement angeordnet. Da das vierte Dämpfungselement kein Bauteil umschließen muß, benötigt es keine Aussparung und kann beispielsweise zylinderförmig oder quaderförmig ausgestaltet sein.Preferably, a fourth damping element is arranged between the clamping claw and the cylinder head as a further damping element. Since the fourth damping element does not have to enclose a component, it does not require a recess and can be designed, for example, in the shape of a cylinder or a cuboid.

Das Verbindungsmittel kann als Schraube ausgestaltet sein, die durch eine Öffnung in der Spannpratze geführt ist. Der Kopf der Schraube ist über der Spannpratze angeordnet und drückt gegen die Spannpratze nach unten. Das Gewinde der Schraube ist in den Zylinderkopf eingeschraubt. Zwischen dem Kopf der Schraube und der Spannpratze ist vorzugsweise ein drittes Dämpfungselement angeordnet, das aus einem der Materialien besteht, aus dem das erste Dämpfungselement bestehen kann.The connecting means may be configured as a screw which is guided through an opening in the clamping claw. The head of the screw is placed over the clamping claw and presses down against the clamping claw. The thread of the screw is screwed into the cylinder head. Between the head of the screw and the clamping claw a third damping element is preferably arranged, which consists of one of the materials from which the first damping element may consist.

Im Folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Figur näher erläutert.In the following an embodiment of the invention will be explained in more detail with reference to FIG.

Die Figur zeigt einen Querschnitt durch einen Teil eines Zylinderkopfes und eines daran montierten Injektors mit einer ersten Öffnung, einer zweiten Öffnung, einem ersten Dämpfungselement, einem zweiten Dämpfungselement, einem dritten Dämpfungselement, einem vierten Dämpfungselement, einer Schraube, einer Spannpratze, einem ersten Absatz und einem zweiten Absatz.The figure shows a cross section through a part of a cylinder head and an injector mounted thereon with a a first opening, a second opening, a first damping element, a second damping element, a third damping element, a fourth damping element, a screw, a clamping claw, a first shoulder and a second shoulder.

Im Ausführungsbeispiel ist ein Zylinderkopf Z vorgesehen, der eine erste Öffnung O1 aufweist, in die ein unterer Teil eines Injektors I eingeschoben ist (siehe Figur).In the exemplary embodiment, a cylinder head Z is provided, which has a first opening O1, in which a lower part of an injector I is inserted (see figure).

Der Zylinderkopf Z weist innerhalb der ersten Öffnung O1 einen ersten Absatz A1 auf, gegen den der Injektor I gespannt ist.The cylinder head Z has, within the first opening O1, a first shoulder A1, against which the injector I is tensioned.

Zwischen dem ersten Absatz A1 des Zylinderkopfs Z und dem Injektor I ist ein erstes Dämpfungselement D1 aus Graphit angeordnet. Das erste Dämpfungselement D1 ist scheibenförmig und weist eine Dicke von ca. 1/10 mm auf.Between the first paragraph A1 of the cylinder head Z and the injector I, a first damping element D1 made of graphite is arranged. The first damping element D1 is disc-shaped and has a thickness of about 1/10 mm.

Es ist eine Spannpratze S vorgesehen, die einen oberen Teil des Injektors I, der aus der ersten Öffnung O1 des Zylinderkopfs Z herausragt, umfasst. Der obere Teil des Injektors I weist einen zweiten Absatz A2 auf, gegen den die Spannpratze S nach unten drückt. Zwischen der Spannpratze S und dem zweiten Absatz A2 des Injektors I ist ein zweites scheibenförmiges Dämpfungselement D2 aus Graphit mit einer Dicke von ca. 1/10 mm angeordnet.A clamping claw S is provided, which comprises an upper part of the injector I, which protrudes from the first opening O1 of the cylinder head Z. The upper part of the injector I has a second step A2, against which the clamping claw S presses downwards. Between the clamping claw S and the second paragraph A2 of the injector I, a second disc-shaped damping element D2 made of graphite with a thickness of about 1/10 mm is arranged.

Die Spannpratze S weist eine zweite Öffnung O2 auf, durch die eine Schraube SB geführt ist, deren Kopf über der Spannpratze S angeordnet ist, und deren Gewinde in den Zylinderkopf Z eingeschraubt ist. Zwischen dem Kopf der Schraube SB und der Spannpratze S ist ein drittes scheibenförmiges Dämpfungselement D3 aus Graphit mit einer Dicke von ca. 1/10 mm angeordnet. Durch Drehen an der Schraube SB kann der Abstand zwischen der Spannpratze S und dem Zylinderkopf Z eingestellt werden. Dieser Abstand bestimmt wiederum die Kraft, mit der der Injektor I gegen den Zylinderkopf Z durch die Spannpratze S gespannt wird.The clamping claw S has a second opening O2, through which a screw SB is guided, whose head is arranged above the clamping claw S, and whose thread is screwed into the cylinder head Z. Between the head of the screw SB and the clamping claw S, a third disc-shaped damping element D3 made of graphite with a thickness of about 1/10 mm is arranged. By turning the screw SB, the distance between the clamping claw S and the cylinder head Z can be adjusted. This distance in turn determines the Force with which the injector I is tensioned against the cylinder head Z by the clamping claw S.

Zwischen der Spannpratze S und dem Zylinderkopf Z ist ein viertes Dämpfungselement D4 aus Graphit mit einer Dicke von ca. 1/10 mm angeordnet. Das vierte Dämpfungselement D4 hat die Form eines Zylinders.Between the clamping claw S and the cylinder head Z, a fourth damping element D4 made of graphite with a thickness of about 1/10 mm is arranged. The fourth damping element D4 has the shape of a cylinder.

Claims (9)

  1. Cylinder head and injector mounted thereon,
    - with a means for clamping being provided through which the injector (I) is clamped at at least one connecting point against the cylinder head (Z),
    - with a first damping element (D1) which is essentially made of one of the materials graphite, polyformaldehyde, polytetrafluorethylene, memory metal, being arranged at the connecting point between the injector (I) and the cylinder head (Z).
  2. Cylinder head and injector in accordance with claim 1,
    - with the cylinder head (Z) featuring an opening (01) for a combustion chamber,
    - with the injector (I) being inserted into the opening (01) such that the nozzle of the injector (I) is directed towards the combustion chamber,
    - with the cylinder head (Z) featuring a shoulder (A1) within the opening which forms the connection point.
  3. Cylinder head and injector in accordance with claim 1 or 2,
    - with the means for clamping being attached to the injector (I) and to the cylinder head (Z),
    - with a further damping element (D2, D4), which essentially consists of one of the materials graphite, polyformaldehyde, polytetrafluorethylene, memory metal, being arranged between the means for clamping and the injector (I) and/or between the means for clamping and the cylinder head (Z).
  4. Cylinder head and injector in accordance with claim 3,
    - with the means for clamping featuring a clamping claw (S), with an upper part of the injector (I) which protrudes from the (01) opening being surrounded by the clamping claw (S),
    - with the upper part of the injector (I) featuring a shoulder (A2), against which the clamping claw (S) presses downwards,
    - with the means for clamping featuring a connecting means through which the clamping claw (S) is attached to the cylinder head (Z) and with which the space between the clamping claw (S) and the cylinder head (Z) can be adjusted.
  5. Cylinder head and injector in accordance with claim 4,
    - with a second damping element (D2), which is essentially made of one of the materials graphite, polyformaldehyde, polytetrafluorethylene, memory metal, being arranged between the shoulder of the upper part of the injector (I) and the clamping claw (S).
  6. Cylinder head and injector in accordance with claim 4 or 5,
    - with a fourth damping element (D4), which is essentially made of one of the materials graphite, polyformaldehyde, polytetrafluorethylene, memory metal, being arranged between the clamping claw (S) and the cylinder head (Z).
  7. Cylinder head and injector in accordance with one of the claims 4 to 6,
    - with the connecting means be embodied as a screw (SB) which is fed through an opening (02) in the clamping claw (S),
    - with the head of the screw (SB) being arranged above the clamping claw (S) and pressing downwards against the clamping claw (S)
    - with the thread of the screw (SB) being screwed into the cylinder head (Z),
    - with a third damping element (D3), which is essentially a made of one of the materials graphite, polyformaldehyde, polytetrafluorethylene, memory metal, being arranged between the head of the screw (SB) and the clamping claw (S).
  8. Cylinder head and injector in accordance with one of the claims 1 to 7,
    - with the damping elements (D1, D2, D3, D4) being between 0.1 mm and 10 mm thick.
  9. Cylinder head and injector in accordance with one of the claims 1 to 8,
    - with AlCu-titanium being used as the memory metal.
EP20020100564 2001-05-30 2002-05-28 Cylinder head with injector Expired - Fee Related EP1262652B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10126336 2001-05-30
DE2001126336 DE10126336A1 (en) 2001-05-30 2001-05-30 Cylinder head and injector attached to it

Publications (3)

Publication Number Publication Date
EP1262652A2 EP1262652A2 (en) 2002-12-04
EP1262652A3 EP1262652A3 (en) 2003-07-30
EP1262652B1 true EP1262652B1 (en) 2006-07-26

Family

ID=7686644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020100564 Expired - Fee Related EP1262652B1 (en) 2001-05-30 2002-05-28 Cylinder head with injector

Country Status (2)

Country Link
EP (1) EP1262652B1 (en)
DE (2) DE10126336A1 (en)

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JP4546404B2 (en) * 2006-01-25 2010-09-15 本田技研工業株式会社 Engine fuel injection valve mounting structure
DE102006009094A1 (en) 2006-02-28 2007-08-30 Bayerische Motoren Werke Ag Damper for use between cylinder head and injector in region of injector foot, has sub-functional section e.g. inner ring and outer ring, for fixing injector with respect to cylinder head, where damper is formed as multipart structure
ATE416308T1 (en) 2006-03-23 2008-12-15 Delphi Tech Inc FASTENING ARRANGEMENT FOR AN INJECTOR
EP1862669B1 (en) 2006-06-01 2010-03-03 Continental Automotive GmbH Compensation device and cylinder head arrangement
FR2904059B1 (en) * 2006-07-21 2010-06-18 Peugeot Citroen Automobiles Sa HOLDING FORK OF A THERMAL MOTOR INJECTOR HOLDER.
EP1887215A1 (en) 2006-08-01 2008-02-13 Siemens Aktiengesellschaft Clamping device and cylinder head arrangement
US7682117B2 (en) * 2006-09-27 2010-03-23 Illinois Tool Works Inc. Work piece isolating assembly
DE102007002682A1 (en) 2007-01-18 2008-07-24 Bayerische Motoren Werke Aktiengesellschaft Damping device for damping arrangement of injector of motor vehicle to carrier body, has damping unit for damping, and rings for position-accurate fixing of injector with respect to carrying body, where device includes multipart structure
FR2920488A1 (en) * 2007-09-04 2009-03-06 Peugeot Citroen Automobiles Sa INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE COMPRISING SUCH AN INJECTION DEVICE.
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FR2949247B1 (en) * 2009-08-24 2011-09-16 Renault Sa SYSTEM FOR MOUNTING A RESONANT NEEDLE INJECTION DEVICE.
EP2372140B1 (en) * 2010-03-25 2012-12-12 Continental Automotive GmbH Coupling device
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Also Published As

Publication number Publication date
DE10126336A1 (en) 2002-12-12
EP1262652A2 (en) 2002-12-04
EP1262652A3 (en) 2003-07-30
DE50207596D1 (en) 2006-09-07

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