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EP1262652A2 - Cylinder head with injector - Google Patents

Cylinder head with injector Download PDF

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Publication number
EP1262652A2
EP1262652A2 EP02100564A EP02100564A EP1262652A2 EP 1262652 A2 EP1262652 A2 EP 1262652A2 EP 02100564 A EP02100564 A EP 02100564A EP 02100564 A EP02100564 A EP 02100564A EP 1262652 A2 EP1262652 A2 EP 1262652A2
Authority
EP
European Patent Office
Prior art keywords
cylinder head
injector
clamping claw
damping element
tensioning
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
EP02100564A
Other languages
German (de)
French (fr)
Other versions
EP1262652A3 (en
EP1262652B1 (en
Inventor
Wendelin KLÜGL
Heinz Lixl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1262652A2 publication Critical patent/EP1262652A2/en
Publication of EP1262652A3 publication Critical patent/EP1262652A3/en
Application granted granted Critical
Publication of EP1262652B1 publication Critical patent/EP1262652B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14Arrangements of injectors with respect to engines; Mounting of injectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/24Cylinder heads
    • F02F1/242Arrangement of spark plugs or injectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/09Fuel-injection apparatus having means for reducing noise
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85Mounting of fuel injection apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85Mounting of fuel injection apparatus
    • F02M2200/855Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws

Definitions

  • the invention relates to a cylinder head and to it mounted injector as used in automotive engineering Find use.
  • the invention has for its object a cylinder head and an injector mounted on it with a small one Specify noise emissions with which the above Disadvantages can be avoided.
  • a cylinder head and a injector mounted thereon with the following features: It is a Means for tensioning are provided through which the injector at least one connection point against the cylinder head is excited. At the junction between the injector and a first damping element is arranged on the cylinder head which essentially consists of one of the materials graphite, Polyformaldehyde, polytetrafluoroethylene, memory metal.
  • the transmission of Structure-borne noise from the injector to the cylinder head is strong dampened, so that the airborne sound radiation from the cylinder head is also strongly dampened.
  • the material of the first damping element must be sound absorbing act and at the same time be resistant to pressure, because at the Connection point through the means for tensioning the injector against the cylinder head with a high force, which is usually is between 4 and 12 kN.
  • a flowing of the materials mentioned with high force can be used especially with a positive connection Avoid backing material well.
  • a memory metal is, for example, AlCu titanate.
  • the thickness of the first damping element is preferably about 1/10 mm to 10mm.
  • the cylinder head has an opening for one Combustion chamber on.
  • the injector is in the opening inserted that the injector nozzle towards the combustion chamber is directed.
  • the cylinder head faces inside the opening a paragraph that forms the junction and against the the injector is cocked.
  • the first Damping element arranged.
  • the first damping element is for example, disc-shaped.
  • the means for clamping can be on the injector and on the cylinder head be attached.
  • another damping element arranged which essentially consists of one of the materials Graphite, polyformaldehyde, polytetrafluoroethylene, memory metal consists. It also applies to the further damping element that it should have a sound-absorbing effect as well as against high pressures should be resistant.
  • the means for tensioning is on the injector not attached to the cylinder head. Instead, that's the means attached to another component for clamping, on which one Force can be applied by which the injector against the Cylinder head can be clamped.
  • the means for clamping can have a clamping claw. On upper part of the injector protruding from the opening, in this case is covered by the clamp. The upper Part of the injector has a paragraph against which the Clamping claw pushes down.
  • the means of tension can have a connecting means through which the clamping claw on Cylinder head is fixed 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 the injector is clamped on the cylinder head can be set.
  • a second damping element is arranged.
  • the fourth damping element no component has to enclose, it does not require a recess and can be cylindrical or cuboid, for example be designed.
  • the connecting means can be designed as a screw, which is passed through an opening in the clamping claw.
  • the The head of the screw is arranged over the clamping claw and presses down against the clamp.
  • the thread of the The screw is screwed into the cylinder head.
  • Between the The head of the screw and the claw is preferably a third damping element arranged, which consists of one of the Materials consists of which the first damping element can exist.
  • the figure shows a cross section through part of a Cylinder head and an injector mounted thereon with a first opening, a second opening, a first Damping element, a second damping element, one third damping element, a fourth damping element, a screw, a clamp, a first paragraph and a second paragraph.
  • a cylinder head Z which has a first opening O1 into which a lower part of a Injector I is inserted (see figure).
  • the cylinder head Z has inside the first opening O1 a first paragraph A1 against which the injector I cocked is.
  • the first damping element D1 is disk-shaped and has a thickness of approx. 1/10 mm.
  • a clamping claw S is provided, which has an upper part of the injector I, which from the first opening O1 of the Cylinder head Z protrudes, includes.
  • the upper part of the Injector I has a second paragraph A2 against which the Clamping claw S presses down.
  • a second disc-shaped damping element D2 made of graphite with a Thickness of approx. 1/10 mm arranged.
  • the clamping claw S has a second opening O2 through which a screw SB is guided, the head of which over the clamping claw S is arranged, and the thread in the cylinder head Z is screwed in.
  • a third disc-shaped one Damping element D3 made of graphite with a thickness of approx. 1/10 mm arranged.
  • fourth damping element D4 made of graphite with a thickness of arranged about 1/10 mm.
  • the fourth damping element D4 has the shape of a cylinder.

Landscapes

  • 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)

Abstract

The cylinder head (Z) with an injector (I) comprises means allowing the injector to be clamped against the cylinder head, and a damping element (D1) which is located between the injector and the cylinder head. The materials of the damping element include plastics, graphite and a metal with shape memory.

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 to it mounted injector as used in automotive engineering Find use.

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 the fuel supply of internal combustion engines memory injection systems are increasingly used, where with very high injection pressures and fast Switching speeds is worked. With these Fuel injection systems use a fuel Pumped high pressure pump into a high pressure accumulator from which out of the fuel with the help of injectors into the Internal combustion engine is injected. The injector will be there actuated by an electrically controlled actuator, whereby especially the use of piezoelectric actuators for Achieve sufficiently short switching times as advantageous has proven.

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.Especially the extremely fast switching actuators Give switching times in the range of less than 200 microseconds however their high frequency mechanical vibrations to the surrounding injector housing of the injector. This Vibrations then plant themselves along the injector housing continue and are in the cylinder head of the internal combustion engine directed. On the surface of the injector housing and the These mechanical vibrations significant noise, which negatively affects driving comfort influence.

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 noise emissions has already been proposed reduced energy when energizing the to use piezoelectric actuator, and one another to carry out coordinated spray starts. This approach reduces the noise emission only insufficiently.

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.It has also been proposed that to provide the piezoelectric actuator with a cover. However, this approach requires a complex one Assembly. In addition, the volume of the Injector 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 a cylinder head and an injector mounted on it with a small one Specify noise emissions with which the above 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 task is solved by a cylinder head and a injector mounted thereon with the following features: It is a Means for tensioning are provided through which the injector at least one connection point against the cylinder head is excited. At the junction between the injector and a first damping element is arranged on the cylinder head which essentially consists 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.Through the first damping element, the transmission of Structure-borne noise from the injector to the cylinder head is strong dampened, so that the airborne sound radiation from the cylinder head is also strongly dampened.

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 absorbing act and at the same time be resistant to pressure, because at the Connection point through the means for tensioning the injector against the cylinder head with a high force, which is usually is 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 shown that graphite, polyformaldehyde, Materials suitable for polytetrafluoroethylene and memory metals are for the first damping element.

Ein Verfließen der genannten Materialien bei hoher Kraft lässt sich besonders bei formschlüssiger Verbindung mittels Trägermaterial gut vermeiden.A flowing of the materials mentioned with high force can be used especially with a positive connection Avoid backing material well.

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.The thickness of the first damping element is preferably about 1/10 mm to 10mm.

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 one Combustion chamber on. The injector is in the opening inserted that the injector nozzle towards the combustion chamber is directed. The cylinder head faces inside the opening a paragraph that forms the junction and against the the injector is cocked. Preferably between Paragraph of the cylinder head and the injector the first Damping element arranged. The first damping element is 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 clamping can be on the injector and on the cylinder head be attached. In this case, between the means to Clamping and the injector and / or between the means for Clamping and the cylinder head another damping element arranged, which essentially consists of one of the materials Graphite, polyformaldehyde, polytetrafluoroethylene, memory metal consists. It also applies to the further damping element that it should have a sound-absorbing effect as well as against high pressures should be resistant.

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 is on the injector not attached to the cylinder head. Instead, that's the means attached to another component for clamping, on which one Force can be applied by which the injector against the Cylinder head can be clamped.

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 clamping can have a clamping claw. On upper part of the injector protruding from the opening, in this case is covered by the clamp. The upper Part of the injector has a paragraph against which the Clamping claw pushes down. The means of tension can have a connecting means through which the clamping claw on Cylinder head is fixed 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 the injector is clamped on the cylinder head can be set.

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

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.Is preferably between the clamp and the A fourth cylinder head as a further damping element Damping element arranged. Because the fourth damping element no component has to enclose, it does not require a recess and can be cylindrical or cuboid, for example be designed.

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 can be designed as a screw, which is passed through an opening in the clamping claw. The The head of the screw is arranged over the clamping claw and presses down against the clamp. The thread of the The screw is screwed into the cylinder head. Between the The head of the screw and the claw is preferably a third damping element arranged, which consists of one of the Materials consists of which the first damping element can exist.

Im Folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Figur näher erläutert.The following is an embodiment of the invention explained in more detail with reference to the figure.

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 part of a Cylinder head and an injector mounted thereon with a first opening, a second opening, a first Damping element, a second damping element, one third damping element, a fourth damping element, a screw, a clamp, a first paragraph and a second paragraph.

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 into which a lower part of a 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 inside the first opening O1 a first paragraph A1 against which the injector I cocked is.

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 is a first damping element D1 made of graphite arranged. The first damping element D1 is disk-shaped and has a thickness of approx. 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 has an upper part of the injector I, which from the first opening O1 of the Cylinder head Z protrudes, includes. The upper part of the Injector I has a second paragraph A2 against which the Clamping claw S presses down. Between the clamping claw S and the second paragraph A2 of the injector I is a second disc-shaped damping element D2 made of graphite with a Thickness of approx. 1/10 mm 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, the head of which over the clamping claw S is arranged, and the thread in the cylinder head Z is screwed in. Between the head of the screw SB and the Clamping claw S is a third disc-shaped one Damping element D3 made of graphite with a thickness of approx. 1/10 mm arranged. By turning the screw SB the Distance between the clamping claw S and the cylinder head Z can be set. This distance in turn determines the Force with which the injector I against the cylinder head Z by the claw S is clamped.

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.There is a between the clamping claw S and the cylinder head Z. fourth damping element D4 made of graphite with a thickness of arranged about 1/10 mm. The fourth damping element D4 has the shape of a cylinder.

Claims (9)

Zylinderkopf und daran montierter Injektor, wobei ein Mittel zum Spannen vorgesehen ist, durch das der Injektor (I) an mindestens einer Anschlußstelle gegen den Zylinderkopf (Z) gespannt ist, wobei an der Anschlußstelle zwischen dem Injektor (I) und dem Zylinderkopf (Z) ein erstes Dämpfungselement (D1) angeordnet ist, das im wesentlichen aus einem der Materialien Graphit, Polyformaldehyd, Polytetrafluorethylen, Memorymetall besteht. Cylinder head and injector mounted on it, A means for tensioning is provided, by means of which the injector (I) is tensioned against the cylinder head (Z) at at least one connection point, wherein at the connection point between the injector (I) and the cylinder head (Z) a first damping element (D1) is arranged, which essentially consists of one of the materials graphite, polyformaldehyde, polytetrafluoroethylene, memory metal. Zylinderkopf und Injektor nach Anspruch 1, wobei der Zylinderkopf (Z) eine Öffnung (O1) für einen Brennraum aufweist, wobei der Injektor (I) derart in die Öffnung (O1) eingeschoben ist, daß die Düse des Injektors (I) zum Brennraum hin gerichtet ist, wobei der Zylinderkopf (Z) innerhalb der Öffnung (O1) einen Absatz (A1) aufweist, der die Anschlußstelle bildet. Cylinder head and injector according to claim 1, the cylinder head (Z) having an opening (O1) for a combustion chamber, the injector (I) being pushed into the opening (O1) in such a way that the nozzle of the injector (I) is directed towards the combustion chamber, wherein the cylinder head (Z) has a shoulder (A1) within the opening (O1), which forms the connection point. Zylinderkopf und Injektor nach Anspruch 1 oder 2, wobei das Mittel zum Spannen am Injektor (I) und am Zylinderkopf (Z) befestigt ist, wobei zwischen dem Mittel zum Spannen und dem Injektor (I) und/oder zwischen dem Mittel zum Spannen und dem Zylinderkopf (Z) ein weiteres Dämpfungselement (D2, D4) angeordnet ist, das im wesentlichen aus einem der Materialien Graphit, Polyformaldehyd, Polytetrafluorethylen, Memorymetall besteht. Cylinder head and injector according to claim 1 or 2, the means for tensioning being attached to the injector (I) and to the cylinder head (Z), wherein a further damping element (D2, D4) is arranged between the means for tensioning and the injector (I) and / or between the means for tensioning and the cylinder head (Z), which essentially consists of one of the materials graphite, polyformaldehyde, polytetrafluoroethylene, Memory metal exists. Zylinderkopf und Injektor nach Anspruch 3, wobei das Mittel zum Spannen eine Spannpratze (S) aufweist, wobei ein oberer Teil des Injektors (I), der aus der (O1) Öffnung herausragt, von der Spannpratze (S) umfaßt wird, wobei der obere Teil des Injektors (I) einen Absatz (A2) aufweist, gegen den die Spannpratze (S) nach unten drückt, wobei das Mittel zum Spannen ein Verbindungsmittel aufweist, durch das die Spannpratze (S) am Zylinderkopf (Z) befestigt ist und mit dem der Abstand zwischen der Spannpratze (S) und dem Zylinderkopf (Z) verstellt werden kann. Cylinder head and injector according to claim 3, the means for tensioning having a tensioning claw (S), wherein an upper part of the injector (I), which protrudes from the (O1) opening, is surrounded by the clamping claw (S), the upper part of the injector (I) having a shoulder (A2) against which the clamping claw (S) presses downwards, wherein the means for clamping has a connecting means by which the clamping claw (S) is attached to the cylinder head (Z) and with which the distance between the clamping claw (S) and the cylinder head (Z) can be adjusted. Zylinderkopf und Injektor nach Anspruch 4, wobei zwischen dem Absatz des oberen Teils des Injektors (I) und der Spannpratze (S) ein zweites Dämpfungselement (D2) angeordnet ist, das im wesentlichen aus einem der Materialien Graphit, Polyformaldehyd, Polytetrafluorethylen, Memorymetall besteht. Cylinder head and injector according to claim 4, wherein between the shoulder of the upper part of the injector (I) and the clamping claw (S) a second damping element (D2) is arranged, which essentially consists of one of the materials graphite, polyformaldehyde, polytetrafluoroethylene, memory metal. Zylinderkopf und Injektor nach Anspruch 4 oder 5, wobei zwischen der Spannpratze (S) und dem Zylinderkopf (Z) ein viertes Dämpfungselement (D4) angeordnet ist, das im wesentlichen aus einem der Materialien Graphit, Polyformaldehyd, Polytetrafluorethylen, Memorymetall besteht. Cylinder head and injector according to claim 4 or 5, wherein a fourth damping element (D4) is arranged between the clamping claw (S) and the cylinder head (Z), which essentially consists of one of the materials graphite, polyformaldehyde, polytetrafluoroethylene, memory metal. Zylinderkopf und Injektor nach einem der Ansprüche 4 bis 6, wobei das Verbindungsmittel als Schraube (SB) ausgestaltet ist, die durch eine Öffnung (O2) in der Spannpratze (S) geführt ist, wobei der Kopf der Schraube (SB) über der Spannpratze (S) angeordnet ist und gegen die Spannpratze (S) nach unten drückt, wobei das Gewinde der Schraube (SB) in den Zylinderkopf (Z) eingeschraubt ist, wobei zwischen dem Kopf der Schraube (SB) und der Spannpratze (S) ein drittes Dämpfungselement (D3) angeordnet ist, das im wesentlichen aus einem der Materialien Graphit, Polyformaldehyd,
Polytetrafluorethylen, Memorymetall besteht.
Cylinder head and injector according to one of claims 4 to 6, the connecting means being designed as a screw (SB) which is guided through an opening (O2) in the clamping claw (S), the head of the screw (SB) being arranged above the clamping claw (S) and pressing downwards against the clamping claw (S), the thread of the screw (SB) is screwed into the cylinder head (Z), wherein a third damping element (D3) is arranged between the head of the screw (SB) and the clamping claw (S) and essentially consists of one of the materials graphite, polyformaldehyde,
Polytetrafluoroethylene, there is memory metal.
Zylinderkopf und Injektor nach einem der Ansprüche 1 bis 7, wobei die Dämpfungselemente (D1, D2, D3, D4) zwischen 0,1mm und 10 mm dick sind. Cylinder head and injector according to one of claims 1 to 7, wherein the damping elements (D1, D2, D3, D4) are between 0.1 mm and 10 mm thick. Zylinderkopf und Injektor nach einem der Ansprüche 1 bis 8, wobei als Memorymetall AlCu-Titanat verwendet wird. Cylinder head and injector according to one of claims 1 to 8, AlCu titanate is used as the memory metal.
EP20020100564 2001-05-30 2002-05-28 Cylinder head with injector Expired - Lifetime EP1262652B1 (en)

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WO2014111367A1 (en) * 2013-01-18 2014-07-24 Robert Bosch Gmbh Fuel injection system having a fuel-conducting component, a fuel injection valve and a connection element
JP2016504525A (en) * 2013-01-18 2016-02-12 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング FUEL INJECTION DEVICE PROVIDED WITH FUEL GUIDE ELEMENT, FUEL INJECTION VALVE AND COUPLING ELEMENT
US9797355B2 (en) 2013-01-18 2017-10-24 Robert Bosch Gmbh Fuel injection system having a fuel-conducting component, a fuel injection valve and a connection element

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DE10126336A1 (en) 2002-12-12
EP1262652A3 (en) 2003-07-30
EP1262652B1 (en) 2006-07-26
DE50207596D1 (en) 2006-09-07

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