EP2166219B1 - Decoupling element - Google Patents

Decoupling element Download PDF

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Publication number
EP2166219B1
EP2166219B1 EP20090170825 EP09170825A EP2166219B1 EP 2166219 B1 EP2166219 B1 EP 2166219B1 EP 20090170825 EP20090170825 EP 20090170825 EP 09170825 A EP09170825 A EP 09170825A EP 2166219 B1 EP2166219 B1 EP 2166219B1
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EP
European Patent Office
Prior art keywords
fuel injector
decoupling element
annular
pad
metall
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP20090170825
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German (de)
French (fr)
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EP2166219A1 (en
Inventor
Eduard Schmoll
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.)
Hutchinson Stop Choc GmbH and Co KG
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Stop Choc Schwingungstechnik GmbH and Co KG
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Publication of EP2166219A1 publication Critical patent/EP2166219A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • 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
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • the invention relates to a decoupling element for a fuel injector in a guide bore of a cylinder head of an internal combustion engine.
  • the DE 10 2006 009 094 A1 discloses a damping device for arrangement between a cylinder head of an internal combustion engine and a fuel injector mounted thereon, wherein in the cylinder head a guide bore with a support surface and on the fuel injector is provided a parallel to this support surface and coaxial contact surface.
  • a decoupling element of an annular metal pad and two respective shell and annular housing parts made of sheet metal, between which the metal pad is enclosed, is provided for decoupling the fuel injector from the guide bore between the support surface and the coaxial contact surface.
  • US-A-2004/0 040 543 discloses a seal disposed between a fuel injector and a cylinder head of compressible polymer layers and non-compressible, flat metal layers sandwiched between the polymer layers.
  • a polymer body is disposed radially inward and is integral with the polymer layers.
  • the object of the invention is to provide a decoupling element for a fuel injector in a guide bore, which holds the fuel injector sealingly in the guide bore and improves noise reduced.
  • the solution is provided with a decoupling element for a fuel injector with the features of claim 1.
  • the annular seal is made of elastomer for improved tightness.
  • the annular seal consists of a made of compressed wire mesh and impregnated with graphite metal pad, which is integrated into the decoupling element for reliable damping and sealing function at elevated pressures up to 160 bar and elevated temperatures up to 900 ° C.
  • the annular seal is plugged or vulcanized on the outer ring of the decoupling element.
  • the annular seal is formed as O, D or X ring.
  • the annular seal is flat at the free end of the shell and annular housing part and the fuel injector on and on the support surface of the guide bore, so that without widening the guide bore by z.
  • boring seals with relatively large cross-sections can be used at the small gap of about 0.4 mm between the fuel injector and guide bore.
  • FIG. 1 The left side of a longitudinal axis II shown first variant of a decoupling element 1 for a fuel injector 2 in a guide bore 3 of a metallic cylinder head 4 of an internal combustion engine (not shown) has an annular all-metal pad 5, which is substantially coaxial with the fuel injector 2 in two coaxial, respectively - And annular housing parts 6, 7 made of metal, in particular sheet metal or plastic is bordered.
  • the annular housing parts are each formed as an outer and inner ring 6, 7, wherein the outer ring 6 rests on a support surface 8 between two different diameters of the guide bore 3 and the guide bore 3 and the inner ring 7 at a bearing surface 8 parallel to the contact surface 9 between different diameters of the fuel injector 2 and the fuel injector 2 is applied.
  • the outer ring 6 is provided at its fuel injector 2 facing free end with a flange 10 which is bent centrally between the fuel injector 2 and guide bore 3 in the guide bore 3, so that the flange 10 points away from the all-metal pad 5.
  • a seal 11 made of elastomer or other materials by means of pressing or vulcanization is attached. The seal 11 rests with two essentially symmetrical sealing lips on the fuel injector 2 and on the guide bore 3.
  • the seal 11 is designed as an O-ring and rests on its circumference both on the fuel injector 2 and on the guide bore 3.
  • Fig. 2 Corresponding features are indicated by the reference numerals Fig. 1 designated.
  • the left of the longitudinal axis II shown third variant of the decoupling element 1 differs from the previous variants by the shape of the outer ring 6 and the seal 11.
  • the outer ring 6 is at its fuel injector 2 facing the free end 12 in the direction of the all-metal pad 5 so inflected that the O-ring 11 with a segment of its circumference rests flat on the projecting into the guide bore 3, the free end 12 of the outer ring 6, the fuel injector 2 and the guide bore 3.
  • the right of the longitudinal axis II shown fourth variant of the decoupling element 1 has shell and annular housing parts 6, 7 made of sheet metal, in which outer and inner ring 6, 7 are formed so that the outer ring 6, including its the fuel injector 2 facing free end 12th on the support surface 8 up close to the guide bore 3 rests on and the inner ring 7 extends to the contact surface 9 of the fuel injector 2 to close to the outer ring 6.
  • O-ring 11 is located at each of the free ends 12 of the outer and inner rings 6, 7, on the support surface. 8 the guide bore 3 and the fuel injector 2 at.
  • Fig. 3 Corresponding features are denoted by the reference numerals Fig. 1 and 2 designated.
  • the left of the longitudinal axis II shown fifth variant of the decoupling element 1 differs from the previous variants by shell and annular housing parts 6, 7 made of sheet metal, in which outer and inner ring 6, 7 are formed so that each standing substantially perpendicular to each other Leg of both outer and inner ring 6, 7 facing the fuel injector 2 and the guide bore 3 and abut the all-metal pad 5.
  • the approximately rectangular shaped seal 11 made of elastomer or other materials is applied to the fuel injector 2, the all-metal pad 5, the inner end of the inner ring 7 and the outer ring 6 at the free end 12.
  • the right of the longitudinal axis I-I illustrated sixth variant of the decoupling element 1 has shell and annular housing parts 6, 7 according to the fourth variant.
  • the seal 11 is formed approximately rectangular and the all-metal pad 5, adapted to seal 11, cut at right angles from the inner ring 7 to the free end 12 of the outer ring 6. Seal 11 is located at the free ends 12 of the outer and inner rings 6, 7, respectively the bearing surface 8 of the guide bore 3 and the fuel injector 2 at.
  • Fig. 4 Corresponding features are denoted by the reference numerals Fig. 1 . 2 and 3 designated.
  • the left of the longitudinal axis II shown seventh variant of the decoupling element 1 differs from the previous variants by opposing shell and annular housing parts 6, 7 made of sheet metal, which are formed substantially U-shaped, the all-metal pad 5 each comprise three sides and both the fuel injector 2 and the guide bore 3 are facing.
  • shell and annular housing parts 6 is at its fuel injector 2 facing the free end 12 in the direction of the all-metal pad 5 with a substantially constant curvature so inflected that it the O-ring 11 via about a Quarter of its cross-sectional circumference includes.
  • O-ring 11 is flat at the free end 12 of the shell and annular housing part 6 and the fuel injector 2 on and on the support surface 8 of the guide bore 3.
  • the right of the longitudinal axis II shown eighth variant of the decoupling element 1 has a shell and annular housing parts 7, which is formed substantially U-shaped and the all-metal pad 5 includes from three sides and the legs of both the fuel injector 2 and the guide hole. 3 are facing.
  • shell and annular housing parts 6 is inflected at its fuel injector 2 facing the free end 12 in the direction of the all-metal pad 5 at a substantially 90 ° angle that there is a substantially rectangular seal 11 over approx comprises two sides of its cross-sectional circumference. Seal 11 is flat on the free end 12 of the shell and annular housing part 6 and the fuel injector 2 on and on the support surface 8 of the guide bore 3.
  • the all-metal pad 5 is adapted to seal 11, cut at right angles to the free end 12 of the shell and annular housing part 6. Seal 11 is located at the free end 12 of the shell and annular housing part 6, on the support surface 8 of the guide bore 3 and with a curved Side on the fuel injector 2 on.

Description

Die Erfindung betrifft ein Entkopplungselement für einen Kraftstoffinjektor in einer Führungsbohrung eines Zylinderkopfs einer Brennkraftmaschine.The invention relates to a decoupling element for a fuel injector in a guide bore of a cylinder head of an internal combustion engine.

Die DE 10 2006 009 094 A1 offenbart eine Dämpfungseinrichtung zur Anordnung zwischen einem Zylinderkopf einer Brennkraftmaschine und einem daran montierten Kraftstoffinjektor, wobei in dem Zylinderkopf eine Führungsbohrung mit einer Auflagefläche und an dem Kraftstoffinjektor eine zu dieser Auflagefläche parallele und koaxiale Anlagefläche vorgesehen ist. Ein Entkopplungselement aus einem ringförmigen Metallkissen und zwei jeweils schalen- und ringförmigen Gehäuseteilen aus Blech, zwischen denen das Metallkissen eingefasst ist, ist zur Entkopplung des Kraftstoffinjektors von der Führungsbohrung zwischen der Auflagefläche und der koaxialen Anlagefläche vorgesehen. Nachteilig bei dieser Dämpfungseinrichtung des Standes der Technik ist die noch ungenügende Geräuschreduktion und die fehlende Dichtigkeit zwischen Kraftstoffinjektor und Führungsbohrung.The DE 10 2006 009 094 A1 discloses a damping device for arrangement between a cylinder head of an internal combustion engine and a fuel injector mounted thereon, wherein in the cylinder head a guide bore with a support surface and on the fuel injector is provided a parallel to this support surface and coaxial contact surface. A decoupling element of an annular metal pad and two respective shell and annular housing parts made of sheet metal, between which the metal pad is enclosed, is provided for decoupling the fuel injector from the guide bore between the support surface and the coaxial contact surface. A disadvantage of this damping device of the prior art, the still insufficient noise reduction and the lack of tightness between fuel injector and guide bore.

US-A-2004/0 040 543 offenbart eine zwischen einer Kraftstoff-Einspritzvorrichtung und einem Zylinderkopf angeordnete Dichtung aus zusammendrückbaren Polymerschichten und nicht zusammendrückbaren, flachen Metalllagen, die sandwichartig angeordnet sind zwischen den Polymerschichten. Ein Polymerkörper ist radial innen angeordnet und ist einteilig mit den Polymerschichten. Aufgabe der Erfindung ist es, ein Entkopplungselement für einen Kraftstoffinjektor in einer Führungsbohrung zu schaffen, das den Kraftstoffinjektor dichtend in der Führungsbohrung hält und verbessert Geräusche reduziert. US-A-2004/0 040 543 discloses a seal disposed between a fuel injector and a cylinder head of compressible polymer layers and non-compressible, flat metal layers sandwiched between the polymer layers. A polymer body is disposed radially inward and is integral with the polymer layers. The object of the invention is to provide a decoupling element for a fuel injector in a guide bore, which holds the fuel injector sealingly in the guide bore and improves noise reduced.

Die Lösung erfolgt mit einem Entkopplungselement für einen Kraftstoffinjektor mit den Merkmalen des Anspruchs 1.The solution is provided with a decoupling element for a fuel injector with the features of claim 1.

Gemäß einer bevorzugten Ausgestaltung der Erfindung ist die ringförmige Dichtung aus Elastomer für verbesserte Dichtigkeit.According to a preferred embodiment of the invention, the annular seal is made of elastomer for improved tightness.

Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung besteht die ringförmige Dichtung aus einem aus komprimiertem Drahtgestrick gefertigten und mit Graphit getränkten Metallkissen, das in das Entkopplungselement integriert ist für zuverlässige Dämpfungs- und Dichtfunktion bei erhöhten Drücken bis 160 bar und erhöhten Temperaturen bis 900° C.According to a further preferred embodiment of the invention, the annular seal consists of a made of compressed wire mesh and impregnated with graphite metal pad, which is integrated into the decoupling element for reliable damping and sealing function at elevated pressures up to 160 bar and elevated temperatures up to 900 ° C.

Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung ist die ringförmige Dichtung auf den Außenring des Entkopplungselements aufgesteckt oder vulkanisiert. Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung ist die ringförmige Dichtung als O-, D- oder X-Ring ausgebildet.According to a further preferred embodiment of the invention, the annular seal is plugged or vulcanized on the outer ring of the decoupling element. According to a further preferred embodiment of the invention, the annular seal is formed as O, D or X ring.

Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung liegt die ringförmige Dichtung flächig am freien Ende des schalen- und ringförmigen Gehäuseteils und am Kraftstoffinjektor an und auf der Auflagefläche der Führungsbohrung auf, so dass ohne Erweitern der Führungsbohrung durch z. B. Aufbohren Dichtungen mit relativ großen Querschnitten verwandt werden können an dem kleinen Spalt von ca. 0,4 mm zwischen Kraftstoffinjektor und Führungsbohrung.According to a further preferred embodiment of the invention, the annular seal is flat at the free end of the shell and annular housing part and the fuel injector on and on the support surface of the guide bore, so that without widening the guide bore by z. B. boring seals with relatively large cross-sections can be used at the small gap of about 0.4 mm between the fuel injector and guide bore.

Die Erfindung wird im Folgenden anhand bevorzugter Ausführungsbeispiele dargestellt. Es zeigen:

Fig. 1:
einen Querschnitt durch ein Entkopplungs- element für einen Kraftstoffinjektor in einer Führungsbohrung gemäß einer ersten und zweiten Variante der Erfindung,
Fig. 2:
einen Querschnitt durch ein Entkopplungs- element für einen Kraftstoffinjektor in einer Führungsbohrung gemäß einer dritten und vierten Variante der Erfindung,
Fig. 3:
einen Querschnitt durch ein Entkopplungs- element für einen Kraftstoffinjektor in einer Führungsbohrung gemäß einer fünften und sechsten Variante der Erfindung und
Fig. 4:
einen Querschnitt durch ein Entkopplungs- element für einen Kraftstoffinjektor in einer Führungsbohrung gemäß einer siebten und achten Variante der Erfindung.
The invention is illustrated below with reference to preferred embodiments. Show it:
Fig. 1:
a cross section through a decoupling element for a fuel injector in a guide bore according to a first and second variant of the invention,
Fig. 2:
a cross section through a decoupling element for a fuel injector in a guide bore according to a third and fourth variant of the invention,
3:
a cross section through a decoupling element for a fuel injector in a guide bore according to a fifth and sixth variant of the invention and
4:
a cross section through a decoupling element for a fuel injector in a guide bore according to a seventh and eighth variant of the invention.

Fig. 1: Die links einer Längsachse I-I dargestellte erste Variante eines Entkopplungselements 1 für einen Kraftstoffinjektor 2 in einer Führungsbohrung 3 eines metallischen Zylinderkopfs 4 einer Brennkraftmaschine (nicht dargestellt) weist ein ringförmiges Ganzmetallkissen 5 auf, das im wesentlichen koaxial zum Kraftstoffinjektor 2 in zwei koaxiale, jeweils schalen- und ringförmige Gehäuseteile 6, 7 aus Metall, insbesondere Blech oder Kunststoff eingefasst ist. Die ringförmigen Gehäuseteile sind je als ein Außen- und Innenring 6, 7 ausgebildet, wobei der Außenring 6 auf einer Auflagefläche 8 zwischen zwei unterschiedlichen Durchmessern der Führungsbohrung 3 und an der Führungsbohrung 3 aufliegt und der Innenring 7 an einer zur Auflagefläche 8 parallelen Anlagefläche 9 zwischen unterschiedlichen Durchmessern des Kraftstoffinjektors 2 und am Kraftstoffinjektor 2 anliegt. Der Außenring 6 ist an seinem dem Kraftstoffinjektor 2 zugewandten freien Ende mit einem Flansch 10 versehen, der mittig zwischen Kraftstoffinjektor 2 und Führungsbohrung 3 in die Führungsbohrung 3 gebogen ist, so dass der Flansch 10 vom Ganzmetallkissen 5 wegweist. An Flansch 10 ist eine Dichtung 11 aus Elastomer oder anderen Materialien mittels Einpressen oder Vulkanisieren befestigt. Die Dichtung 11 liegt mit jeweils zwei im wesentlichen symmetrischen Dichtlippen am Kraftstoffinjektor 2 und an der Führungsbohrung 3 an. Fig. 1 The left side of a longitudinal axis II shown first variant of a decoupling element 1 for a fuel injector 2 in a guide bore 3 of a metallic cylinder head 4 of an internal combustion engine (not shown) has an annular all-metal pad 5, which is substantially coaxial with the fuel injector 2 in two coaxial, respectively - And annular housing parts 6, 7 made of metal, in particular sheet metal or plastic is bordered. The annular housing parts are each formed as an outer and inner ring 6, 7, wherein the outer ring 6 rests on a support surface 8 between two different diameters of the guide bore 3 and the guide bore 3 and the inner ring 7 at a bearing surface 8 parallel to the contact surface 9 between different diameters of the fuel injector 2 and the fuel injector 2 is applied. The outer ring 6 is provided at its fuel injector 2 facing free end with a flange 10 which is bent centrally between the fuel injector 2 and guide bore 3 in the guide bore 3, so that the flange 10 points away from the all-metal pad 5. To flange 10, a seal 11 made of elastomer or other materials by means of pressing or vulcanization is attached. The seal 11 rests with two essentially symmetrical sealing lips on the fuel injector 2 and on the guide bore 3.

Die rechts der Längsachse I-I dargestellte zweite Variante des Entkopplungselements 1 unterscheidet sich von der ersten Variante durch die Art der Dichtung 11. Dichtung 11 ist als O-Ring ausgebildet und liegt an seinem Umfang sowohl am Kraftstoffinjektor 2 als auch an der Führungsbohrung 3 an.The second variant of the decoupling element 1, shown on the right of the longitudinal axis II, differs from the first variant by the type of seal 11. The seal 11 is designed as an O-ring and rests on its circumference both on the fuel injector 2 and on the guide bore 3.

Fig. 2: Entsprechende Merkmale sind mit den Bezugszeichen aus Fig. 1 bezeichnet. Die links der Längsachse I-I dargestellte dritte Variante des Entkopplungselements 1 unterscheidet sich von den vorhergehenden Varianten durch die Form des Außenrings 6 und die Dichtung 11. Der Außenring 6 ist an seinem dem Kraftstoffinjektor 2 zugewandten freien Ende 12 in Richtung zum Ganzmetallkissen 5 so eingebogen, dass der O-Ring 11 mit einem Segment seines Umfangs flächig am in die Führungsbohrung 3 ragenden, freien Ende 12 des Außenrings 6, am Kraftstoffinjektor 2 und der Führungsbohrung 3 anliegt. Fig. 2 Corresponding features are indicated by the reference numerals Fig. 1 designated. The left of the longitudinal axis II shown third variant of the decoupling element 1 differs from the previous variants by the shape of the outer ring 6 and the seal 11. The outer ring 6 is at its fuel injector 2 facing the free end 12 in the direction of the all-metal pad 5 so inflected that the O-ring 11 with a segment of its circumference rests flat on the projecting into the guide bore 3, the free end 12 of the outer ring 6, the fuel injector 2 and the guide bore 3.

Die rechts der Längsachse I-I dargestellte vierte Variante des Entkopplungselements 1 weist schalen- und ringförmige Gehäuseteile 6, 7 aus Blech auf, bei denen Außen- und Innenring 6, 7 so ausgebildet sind, dass der Außenring 6 einschließlich seinem dem Kraftstoffinjektor 2 zugewandten freien Ende 12 auf der Auflagefläche 8 bis nahe an die Führungsbohrung 3 heran aufliegt und der Innenring 7 an der Anlagefläche 9 des Kraftstoffinjektors 2 bis nahe an den Außenring 6 reicht. Das Ganzmetallkissen 5 ist, angepasst an den O-Ring 11, konkav ausgeschnitten vom Innenring 7 zum freien Ende 12 des Außenrings 6. O-Ring 11 liegt jeweils an den freien Enden 12 der Außen- und Innenringe 6, 7, auf der Auflagefläche 8 der Führungsbohrung 3 und am Kraftstoffinjektor 2 an.The right of the longitudinal axis II shown fourth variant of the decoupling element 1 has shell and annular housing parts 6, 7 made of sheet metal, in which outer and inner ring 6, 7 are formed so that the outer ring 6, including its the fuel injector 2 facing free end 12th on the support surface 8 up close to the guide bore 3 rests on and the inner ring 7 extends to the contact surface 9 of the fuel injector 2 to close to the outer ring 6. The all-metal pad 5, adapted to the O-ring 11, concave cut from the inner ring 7 to the free end 12 of the outer ring 6. O-ring 11 is located at each of the free ends 12 of the outer and inner rings 6, 7, on the support surface. 8 the guide bore 3 and the fuel injector 2 at.

Fig. 3: Entsprechende Merkmale sind mit den Bezugszeichen aus den Fig. 1 und 2 bezeichnet. Die links der Längsachse I-I dargestellte fünfte Variante des Entkopplungselements 1 unterscheidet sich von den vorhergehenden Varianten durch schalen- und ringförmige Gehäuseteile 6, 7 aus Blech, bei denen Außen- und Innenring 6, 7 so ausgebildet sind, dass die jeweils im wesentlichen senkrecht zueinander stehenden Schenkel von sowohl Außen- und Innenring 6, 7 dem Kraftstoffinjektor 2 und der Führungsbohrung 3 zugewandt sind und am Ganzmetallkissen 5 anliegen. Die annähernd rechteckig geformte Dichtung 11 aus Elastomer oder anderen Materialien liegt am Kraftstoffinjektor 2, am Ganzmetallkissen 5, am freien Ende 12 von Innenring 7 und am Außenring 6 an. Fig. 3 Corresponding features are denoted by the reference numerals Fig. 1 and 2 designated. The left of the longitudinal axis II shown fifth variant of the decoupling element 1 differs from the previous variants by shell and annular housing parts 6, 7 made of sheet metal, in which outer and inner ring 6, 7 are formed so that each standing substantially perpendicular to each other Leg of both outer and inner ring 6, 7 facing the fuel injector 2 and the guide bore 3 and abut the all-metal pad 5. The approximately rectangular shaped seal 11 made of elastomer or other materials is applied to the fuel injector 2, the all-metal pad 5, the inner end of the inner ring 7 and the outer ring 6 at the free end 12.

Die rechts der Längsachse I-I dargestellte sechste Variante des Entkopplungselements 1 weist schalen- und ringförmige Gehäuseteile 6, 7 entsprechend der vierten Variante auf. Die Dichtung 11 ist annähernd rechteckig geformt und das Ganzmetallkissen 5 ist, angepasst an Dichtung 11, rechtwinklig ausgeschnitten vom Innenring 7 zum freien Ende 12 des Außenrings 6. Dichtung 11 liegt jeweils an den freien Enden 12 der Außen- und Innenringe 6, 7, auf der Auflagefläche 8 der Führungsbohrung 3 und am Kraftstoffinjektor 2 an.The right of the longitudinal axis I-I illustrated sixth variant of the decoupling element 1 has shell and annular housing parts 6, 7 according to the fourth variant. The seal 11 is formed approximately rectangular and the all-metal pad 5, adapted to seal 11, cut at right angles from the inner ring 7 to the free end 12 of the outer ring 6. Seal 11 is located at the free ends 12 of the outer and inner rings 6, 7, respectively the bearing surface 8 of the guide bore 3 and the fuel injector 2 at.

Fig. 4: Entsprechende Merkmale sind mit den Bezugszeichen aus den Fig. 1, 2 und 3 bezeichnet. Die links der Längsachse I-I dargestellte siebte Variante des Entkopplungselements 1 unterscheidet sich von den vorhergehenden Varianten durch sich gegenüberliegende schalen- und ringförmige Gehäuseteile 6, 7 aus Blech, die im wesentlichen U-förmig ausgebildet sind, das Ganzmetallkissen 5 jeweils von drei Seiten umfassen und dabei sowohl dem Kraftstoffinjektor 2 als auch der Führungsbohrung 3 zugewandt sind. Das mit seinem Scheitel auf der Führungsbohrung 3 aufliegende, schalen- und ringförmige Gehäuseteile 6 ist an seinem dem Kraftstoffinjektor 2 zugewandten freien Ende 12 in Richtung zum Ganzmetallkissen 5 mit im wesentlichen konstanter Krümmung so eingebogen, dass es den O-Ring 11 über ca. ein Viertel seines Querschnittsumfangs umfasst. O-Ring 11 liegt flächig am freien Ende 12 des schalen- und ringförmigen Gehäuseteils 6 und am Kraftstoffinjektor 2 an und auf der Auflagefläche 8 der Führungsbohrung 3 auf. Fig. 4 Corresponding features are denoted by the reference numerals Fig. 1 . 2 and 3 designated. The left of the longitudinal axis II shown seventh variant of the decoupling element 1 differs from the previous variants by opposing shell and annular housing parts 6, 7 made of sheet metal, which are formed substantially U-shaped, the all-metal pad 5 each comprise three sides and both the fuel injector 2 and the guide bore 3 are facing. The resting with its apex on the guide bore 3, shell and annular housing parts 6 is at its fuel injector 2 facing the free end 12 in the direction of the all-metal pad 5 with a substantially constant curvature so inflected that it the O-ring 11 via about a Quarter of its cross-sectional circumference includes. O-ring 11 is flat at the free end 12 of the shell and annular housing part 6 and the fuel injector 2 on and on the support surface 8 of the guide bore 3.

Die rechts der Längsachse I-I dargestellte achte Variante des Entkopplungselements 1 weist ein schalen- und ringförmiges Gehäuseteile 7 auf, das im wesentlichen U-förmig ausgebildet ist und das Ganzmetallkissen 5 von drei Seiten umfasst und dessen Schenkel dabei sowohl dem Kraftstoffinjektor 2 als auch der Führungsbohrung 3 zugewandt sind. Das mit seinem Scheitel auf der Führungsbohrung 3 aufliegende, schalen- und ringförmige Gehäuseteile 6 ist an seinem dem Kraftstoffinjektor 2 zugewandten freien Ende 12 in Richtung zum Ganzmetallkissen 5 mit einem im wesentlichen 90° Winkel eingebogen, dass es eine im wesentlichen rechteckige Dichtung 11 über ca. zwei Seiten ihres Querschnittsumfangs umfasst. Dichtung 11 liegt flächig am freien Ende 12 des schalen- und ringförmigen Gehäuseteils 6 und am Kraftstoffinjektor 2 an und auf der Auflagefläche 8 der Führungsbohrung 3 auf. Das Ganzmetallkissen 5 ist, angepasst an Dichtung 11, rechtwinklig ausgeschnitten zum freien Ende 12 des schalen- und ringförmigen Gehäuseteils 6. Dichtung 11 liegt am freien Ende 12 des schalen- und ringförmigen Gehäuseteiles 6, auf der Auflagefläche 8 der Führungsbohrung 3 und mit einer gewölbten Seite am Kraftstoffinjektor 2 an.The right of the longitudinal axis II shown eighth variant of the decoupling element 1 has a shell and annular housing parts 7, which is formed substantially U-shaped and the all-metal pad 5 includes from three sides and the legs of both the fuel injector 2 and the guide hole. 3 are facing. The resting with its apex on the guide bore 3, shell and annular housing parts 6 is inflected at its fuel injector 2 facing the free end 12 in the direction of the all-metal pad 5 at a substantially 90 ° angle that there is a substantially rectangular seal 11 over approx comprises two sides of its cross-sectional circumference. Seal 11 is flat on the free end 12 of the shell and annular housing part 6 and the fuel injector 2 on and on the support surface 8 of the guide bore 3. The all-metal pad 5 is adapted to seal 11, cut at right angles to the free end 12 of the shell and annular housing part 6. Seal 11 is located at the free end 12 of the shell and annular housing part 6, on the support surface 8 of the guide bore 3 and with a curved Side on the fuel injector 2 on.

Claims (6)

  1. A decoupling element (1) for a fuel injector (2) in a guide drilling (3) of a cylinder head (4) of an internal combustion engine with an annular metall pad (5) provided for abutment against the guide drilling (3) and the fuel injector (2) and two respectively shell-shaped and annular casing components (6, 7) of metal encompassing the metall pad (5), characterized in that the metall pad (5) is conceived as all-metall pad and in that an annular bushing (11) is provided coaxially with regard to the guide drilling (3), said annular bushing (11) being integrated into the all-metall pad (5) or being fixed to at least one of the shell-shaped and annular casing components (6, 7).
  2. The decoupling element (1) according to claim 1, characterized in that the annular bushing (11) is made of elastomer.
  3. The decoupling element (1) according to claim 1, characterized in that the annular bushing (11) consists of a metall pad soaked with graphit and made of a compressed wire fabric, encompassed between the respectively shell-shaped and annular casing components (6, 7).
  4. The decoupling element (1) according to claim 1, characterized in that the annular bushing (11) is conceived as an O-, D- or X-ring.
  5. The decoupling element (1) according to claim 1, characterized in that the annular bushing (11) is particularly clipped or cured on a flange (10) of the outer ring (6).
  6. The decoupling element (1) according to claim 1, characterized in that the annular bushing (11) is lying plane on the free end (12) of the shell-shaped and annular casing component (6) and the fuel injector (2) and on the supporting surface (8) of the guide drilling (3).
EP20090170825 2008-09-20 2009-09-21 Decoupling element Not-in-force EP2166219B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008048173A DE102008048173A1 (en) 2008-09-20 2008-09-20 decoupling element

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EP2166219A1 EP2166219A1 (en) 2010-03-24
EP2166219B1 true EP2166219B1 (en) 2012-06-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9303447B1 (en) 2012-05-15 2016-04-05 Aviation Devices & Electronic Components LLC Elastomeric gasket for fuel access door of an aircraft wing and a method for making the same
US9751244B2 (en) 2012-05-15 2017-09-05 The Patent Well LLC Elastomeric gasket for fuel access door of an aircraft wing and a method for making the same
US10837555B2 (en) 2015-04-08 2020-11-17 Aviation Devices & Electronic Components, L.L.C. Metal mesh with a low electrical resistance conversion coating for use with aircraft structures

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FR2954963A1 (en) * 2010-01-06 2011-07-08 Peugeot Citroen Automobiles Sa Vibration dampener for fuel injector of e.g. diesel engine of i.e. car, has liner cooperating with another liner to improve dissipation of vibrations in frequential domain and/or to dissipate vibrations in another given frequential domain
EP2405126B1 (en) 2010-07-09 2013-04-03 Stop-Choc Schwingungstechnik GmbH & Co. KG Decoupling element with sealing function
JP5270714B2 (en) * 2011-04-27 2013-08-21 トヨタ自動車株式会社 Damping insulator for fuel injection valve
DE102012206194A1 (en) 2012-04-16 2013-10-17 Robert Bosch Gmbh Multi-part insulation element, in particular for a fuel injection device
CN107299872A (en) * 2017-06-21 2017-10-27 重庆长安汽车股份有限公司 A kind of fuel injector support ring of effective reduction gasoline direct injection engine operating noise

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US3695235A (en) * 1970-08-26 1972-10-03 Mcculloch Corp Heat seal for fuel injection nozzles
US6866026B2 (en) 2002-08-28 2005-03-15 Federal-Mogul World Wide, Inc. Gasket for fuel injector
DE102004060462A1 (en) * 2004-12-16 2006-03-23 Daimlerchrysler Ag Fuel injection device for internal combustion engine has damping elements of metal foam accommodated at respective connecting points between injector and cylinder head and between fuel rail and injector
US7591246B2 (en) * 2006-01-17 2009-09-22 Gm Global Technology Operations, Inc. Isolated fuel delivery system
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9303447B1 (en) 2012-05-15 2016-04-05 Aviation Devices & Electronic Components LLC Elastomeric gasket for fuel access door of an aircraft wing and a method for making the same
US9751244B2 (en) 2012-05-15 2017-09-05 The Patent Well LLC Elastomeric gasket for fuel access door of an aircraft wing and a method for making the same
US10166703B2 (en) 2012-05-15 2019-01-01 The Patent Well LLC Elastomeric gasket with multiple skeletons for placement between two parts of an aircraft and a method for making the same
US10603822B2 (en) 2012-05-15 2020-03-31 The Patent Well LLC Elastomeric gasket for fuel access door of an aircraft wing and a method for making the same
US10837555B2 (en) 2015-04-08 2020-11-17 Aviation Devices & Electronic Components, L.L.C. Metal mesh with a low electrical resistance conversion coating for use with aircraft structures

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EP2166219A1 (en) 2010-03-24
DE102008048173A1 (en) 2010-04-08

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