EP1373713A1 - Fuel injection device, especially injector, for internal combustion engines - Google Patents

Fuel injection device, especially injector, for internal combustion engines

Info

Publication number
EP1373713A1
EP1373713A1 EP02726070A EP02726070A EP1373713A1 EP 1373713 A1 EP1373713 A1 EP 1373713A1 EP 02726070 A EP02726070 A EP 02726070A EP 02726070 A EP02726070 A EP 02726070A EP 1373713 A1 EP1373713 A1 EP 1373713A1
Authority
EP
European Patent Office
Prior art keywords
spherical segment
annular
segment surface
fuel injection
injection device
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
EP02726070A
Other languages
German (de)
French (fr)
Other versions
EP1373713B2 (en
EP1373713B1 (en
Inventor
Michael Kurz
Gerd Wahr
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1373713A1 publication Critical patent/EP1373713A1/en
Application granted granted Critical
Publication of EP1373713B1 publication Critical patent/EP1373713B1/en
Publication of EP1373713B2 publication Critical patent/EP1373713B2/en
Anticipated expiration legal-status Critical
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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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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

Definitions

  • Fuel injection device in particular injector, for internal combustion engines
  • the invention relates to a fuel injection device, in particular an injector, for internal combustion engines, with a base body, with an injection housing, with a tensioning device which comprises at least one tension nut with an annular web and an annular shoulder on the injection housing and which braces the injection housing axially with the base body a fuel inlet and with at least one valve element.
  • Such a fuel injection device is known from DE 197 29 843 AI. There is a
  • Fuel injection valve for internal combustion engines shown which has a clamping nut which rests with an inner, conical ring web on an annular shoulder of an injection housing. In this way, the injection housing is clamped against the base body.
  • the ring shoulder is curved on its side facing the ring web in such a way that, at a predetermined distance from the longitudinal axis of the fuel injection device, there is a ring-shaped circumferential contact point against which the conical ring web rests in the assembled state.
  • the object of the present invention is to improve the seal between the injection housing and the base body in a fuel injection device of the type mentioned at the outset. Furthermore, the scatter of the injection quantity should be reduced. In addition, the uniform axial tensioning reduces the wear on the nozzle needle guide and on the nozzle needle seat.
  • the tensioning device has at least one ring surface facing the ring web of the tension nut, which is convexly curved in the manner of a spherical segment surface.
  • the surface pressure in the contact area between the base body and the injection housing is even, the occurrence of leaks in this contact area is less likely.
  • the likelihood of deformation of the injection housing is also less, so that the injection quantity varies from one fuel injector to another less, if at all.
  • the tensioning device comprises a concave spherical segment surface complementary to the convex spherical segment surface, against which the convex spherical segment surface lies flat.
  • the alignment of the injection housing with respect to the base body is particularly low-power and light when the fuel injection device is installed. This leads to a particularly uniform surface pressure at the connection point between the base body and the injection housing.
  • the clamping device is one of the has convex spherical segment surface facing oblique and flat ring surface on which the spherical segment surface lies linearly.
  • Such an inclined annular surface is easy to manufacture and enables the fuel injector according to the invention to be manufactured inexpensively.
  • the oblique ring surface encloses an angle of approximately 120 °. At such an angle, the axial forces required for a secure connection and sealing are still well transmitted, and on the other hand, such an incline offers a good fit for the convex spherical segment surface.
  • the clamping device comprises an annular disk which is arranged between the injection housing and the clamping nut, either the convex or the concave spherical segment surface or the oblique annular surface being formed on the annular disk.
  • annular disc enables, for example, the use of a conventional clamping nut, which keeps the manufacturing costs of the fuel injection device according to the invention low.
  • the injection housing can also have a conventional ring shoulder, on which there is therefore neither a bevel nor a spherical segment surface if the ring disk according to the invention is provided.
  • the convex spherical segment surface is formed on the ring shoulder of the injection housing.
  • the injection housing is a relatively complex part, on which the additional processing step means comparatively little additional effort.
  • Alignment of the injection housing with respect to the base body is made even easier if the convex Spherical segment surface and the concave spherical segment surface cooperating with this or the oblique ring surface are provided with a low-friction layer, preferably Teflon.
  • FIG. 1 a partial longitudinal section through a first exemplary embodiment of a fuel injection device with a clamping nut and an annular disk;
  • Fig. 2 a section through the washer
  • Fig. 3 a plan view of the clamping nut of the
  • Fig. 4 a partial longitudinal section or a
  • Fig. 5 a section along the line V-V of Fig. 4;
  • FIG. 6 a view similar to FIG. 1 of a second exemplary embodiment of a fuel injection device with a clamping nut and an annular disk;
  • Fig. 7 a plan view of the washer
  • Fig. 8 a section along the line IX-IX of Fig. 7;
  • Fig. 9 a longitudinal section through an area of
  • a fuel injection device bears the overall reference number 10. It includes a base body 12, an injection housing 14 and a clamping nut 16. On the base body 12 there is a thread 18 with which the clamping nut 16 is screwed. In the injection housing 14 there is a recess 20 running in the longitudinal direction thereof, in which a valve needle 22 is arranged. A fuel inlet 24 supplies an annular space 26 between the valve needle 22 and the recess 20 with fuel. Axial movement of the valve needle 22 allows fuel outlet openings (not shown in the figure) to be connected to the annular space 26, so that fuel is emitted from the fuel injection device 10.
  • the fuel injection device 10 is generally used to inject fuel directly into the combustion chamber of an internal combustion engine. It can be used to inject gasoline or diesel fuel.
  • the clamping nut 16 (cf. FIGS. 3-5) is a hollow cylindrical part which comprises a wall section 30 and an annular web 32 pointing radially inwards on its lower end which is formed in FIG. 1.
  • the upper surface 33 of the annular web 32 in FIG. 1 and the inner surface of the wall section 30 lie at an angle of approximately 90 ° to one another.
  • the injection housing 14 has a section 34 with a larger and a section 36 with a smaller diameter.
  • the diameter of the section 36 with a smaller diameter is somewhat smaller than the diameter of the opening 38 delimited by the ring web 32 of the clamping nut 16.
  • the diameter of the section 34 of the injection housing 14 is somewhat smaller than the inside diameter of the wall section 30 of the clamping nut 16.
  • An annular shoulder 40 is formed between the section 34 and the section 36 of the injection housing 14.
  • the ring shoulder 40 is convexly curved in the manner of a spherical segment surface 41.
  • the center M of the spherical segment surface 41 lies on the longitudinal axis 42 of the fuel injection device 10.
  • the radius of the sphere from which the spherical segment surface 41 is cut out is R.
  • An annular disk 44 is present between the ring web 32 of the clamping nut 16 and the annular shoulder 40 on the injection housing 14 (cf. FIG. 2).
  • the inside diameter of the ring disk 44 is slightly larger than the outside diameter of the section 36 of the injection housing 14, whereas the outside diameter of the ring disk 44 is slightly smaller than the inside diameter of the wall section 30 of the clamping nut 16.
  • the upper side 45 of the ring disk 44 is designed as a concave spherical segment surface 46, which is complementary to the convex spherical segment surface 41 on the injection housing 14.
  • the underside of the washer 44 has a conical depression.
  • the radius of the ball, from which the concave spherical segment surface 46 is cut out, is thus also R, and the center M of this ball also lies on the longitudinal axis 42 of the fuel injector 10.
  • Both spherical segment surfaces 41 and 46 are coated with a low-friction Teflon layer (not visible).
  • the spherical segment surfaces 41 and 46 thus work together in the manner of a ball socket ball head joint.
  • the clamping nut 16 with the ring web 32, the ring shoulder 40 on the injection housing 14 and the ring disk 44 form a clamping device 48 overall.
  • the assembly of the fuel injection device 10 by means of the tensioning device 48 proceeds as follows:
  • the washer 44 is pushed over the section 36 of the injection housing 14 from below.
  • the concave spherical segment surface 46 of the annular disc 44 faces upward, that is to say to the annular shoulder 40 of the injection housing 14.
  • the clamping nut 16 is pushed over the injection housing 14, the annular web 32 being arranged at the bottom.
  • the clamping nut 16 is now screwed onto the base body 12 with the thread 18.
  • an area of the injection housing 14 which is covered by the clamping nut 16 in FIG. 1 comes into contact with an area of the base body 12 which is also covered in FIG. 1.
  • a sealing element for example an O-ring, can also be present between the two parts.
  • Parts and elements which have functions equivalent to the fuel injection device shown in FIGS. 1-5 have the same reference numerals and are not explained again in detail.
  • the surface of the ring web 32 of the clamping nut 16 pointing upwards in FIG. 6 is designed as an oblique ring surface 50.
  • the oblique ring surface 50 encloses an angle of approximately 120 ° (cf. FIG. 9).
  • the annular shoulder 40 of the injection housing 14 is not convexly curved, but extends straight from the section 36 with a smaller diameter of the injection housing 14 and at an angle of approximately 90 ° radially outwards.
  • the annular disk 44 in turn has an annular surface on its underside which is convexly curved in the manner of a spherical segment surface 41.
  • the top 45 of the annular disc 44 has a depression.
  • the decoupling of the alignment of the clamping nut 16 on the one hand and the alignment of the injection housing 14 on the other hand is thus achieved by the oblique ring surface 50 and the convex spherical segment surface 41 cooperating therewith.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a fuel injection device (10), especially an injector, for internal combustion engines. Said device comprises a base (12), an injection housing (14) and a tensioning device (48). Said tensioning device (48) includes at least one adjusting nut (16) with an annular link (32) and an annular collar (40) on the injection housing (14). The tensioning device (48) axially braces the injection housing (14) with the base (12). The injection device further comprises a fuel inlet (24) and at least one valve element (22). In order to improve sealing between the base (12) and the injection housing (14), the tensioning device (48) is provided with at least one annular surface facing the annular link (32) of the adjusting screw (16) and being convex in the manner of a spherical segment surface (41).

Description

Kraftstoff-Einspritzvorrichtunq-, insbesondere Injektor, für BrennkraftmaschinenFuel injection device, in particular injector, for internal combustion engines
Stand der TechnikState of the art
Die Erfindung betrifft eine Kraftstoff- Einspritzvorrichtung, insbesondere Injektor, für Brennkraftmaschinen, mit einem Basiskörper, mit einem Einspritzgehäuse, mit einer Spanneinrichtung, welche mindestens eine Spannmutter mit einem Ringsteg und eine Ringschulter am Einspritzgehäuse umfasst und welche das Einspritzgehäuse axial mit dem Basiskörper verspannt, mit einem Kraftstoff-Einlass und mit mindestens einem Ventilelement .The invention relates to a fuel injection device, in particular an injector, for internal combustion engines, with a base body, with an injection housing, with a tensioning device which comprises at least one tension nut with an annular web and an annular shoulder on the injection housing and which braces the injection housing axially with the base body a fuel inlet and with at least one valve element.
Eine derartige Kraftstoff-Einspritzvorrichtung ist aus der DE 197 29 843 AI bekannt. Dort ist einSuch a fuel injection device is known from DE 197 29 843 AI. There is a
Kraftstoffeinspritzventil für Brennkraftmaschinen gezeigt, welches eine Spannmutter aufweist, die mit einem inneren, konisch ausgebildeten Ringsteg an einer Ringschulter eines Einspritzgehäuses anliegt. Auf diese Weise wird das Einspritzgehäuse gegen den Basiskörper verspannt. Die Ringschulter ist auf ihrer dem Ringsteg zugewandten Seite derart gekrümmt ausgebildet, dass sich in einem vorgegebenen Abstand von der Längsachse der Kraftstoff- Einspritzvorrichtung ein ringförmig umlaufender Auflagepunkt ergibt, an dem der konische Ringsteg im montierten Zustand anliegt. Die vorliegende Erfindung hat die Aufgabe, bei einer Kraftstoff-Einspritzvorrichtung der eingangs genannten Art die Abdichtung zwischen dem Einspritzgehäuse und dem Basiskörper zu verbessern. Ferner sollen die Streuungen der Einspritzmenge verringert werden. Zudem wird durch die gleichmäßige axiale Verspannnung der Verschleiss an der Düsennadelführung sowie am Düsennadelsitz verringert .Fuel injection valve for internal combustion engines shown, which has a clamping nut which rests with an inner, conical ring web on an annular shoulder of an injection housing. In this way, the injection housing is clamped against the base body. The ring shoulder is curved on its side facing the ring web in such a way that, at a predetermined distance from the longitudinal axis of the fuel injection device, there is a ring-shaped circumferential contact point against which the conical ring web rests in the assembled state. The object of the present invention is to improve the seal between the injection housing and the base body in a fuel injection device of the type mentioned at the outset. Furthermore, the scatter of the injection quantity should be reduced. In addition, the uniform axial tensioning reduces the wear on the nozzle needle guide and on the nozzle needle seat.
Diese Aufgabe wird bei einer Kraftstoff- Einspritzvorrichtung der eingangs genannten Art dadurch gelöst, dass die Spanneinrichtung mindestens eine dem Ringsteg der Spannmutter zugewandte Ringfläche aufweist, die in der Art einer Kugelsegmentfläche konvex gekrümmt ist .This object is achieved in a fuel injection device of the type mentioned in the introduction in that the tensioning device has at least one ring surface facing the ring web of the tension nut, which is convexly curved in the manner of a spherical segment surface.
Vorteile der ErfindungAdvantages of the invention
Erfindungsgemäß wurde festgestellt, dass gewisse Undichtigkeiten zwischen dem Einspritzgehäuse und dem Basiskörper dadurch auftreten können, dass die Anpresskraft an der Kontaktfläche zwischen Basiskörper und Einspritzgehäuse nicht gleichmäßig verläuft. Sind Stellen vorhanden, an denen die Anpresskraft nur gering ist, ist an diesen Stellen auch die Abdichtung nur relativ gering. An anderen Stellen kann es dagegen zu Kraftspitzen kommen, welche zu einer Verformung des Einspritzgehäuses führen. Dies kann wiederum die Ursache sein für Streuungen bei der Einspritzmenge von einer Kraftstoff-Einspritzvorrichtung zur anderen. Die Ursache für die ungleichmäßige Kraftverteilung liegt in Planlauftoleranzen einerseits am Körpergewinde des Basiskörpers und andererseits am Gewinde der Spannmutter selbst.According to the invention, it was found that certain leaks between the injection housing and the base body can occur due to the fact that the contact force on the contact surface between the base body and the injection housing does not run uniformly. If there are points at which the contact pressure is only slight, the sealing at these points is also only relatively small. At other points, on the other hand, force peaks can occur, which lead to a deformation of the injection housing. This in turn can be the cause of scatter in the injection quantity from one fuel injection device to another. The cause of the uneven force distribution is due to axial run-out on the one hand on the body thread of the base body and on the other hand on the thread of the clamping nut itself.
Derartige Ungleichmäßigkeiten der axialen Spannkraft zwischen Basiskörper und Einspritzgehäuse werden bei der erfindungsgemäßen Kraftstoff-Einspritzvorrichtung weitgehend vermieden. Dies wird dadurch erreicht, dass sich das Einspritzgehäuse aufgrund der vorhandenen Kugelsegmentfläche bei der Montage automatisch so ausrichtet, dass die Kraft über den Umfang der Spanneinrichtung im Wesentlichen gleichmäßig verteilt ist. Durch die Kugelsegmentfläche wird also eine Art Gelenkfunktion bereitgestellt, welche ein selbsttätiges und optimales Ausrichten des Einspritzgehäuses gegenüber Basiskörper bei der Montage der Kraftstoff- Einspritzvorrichtung ermöglicht.Such irregularities in the axial clamping force between the base body and the injection housing are in the fuel injection device according to the invention largely avoided. This is achieved in that the injection housing automatically aligns itself during assembly due to the existing spherical segment surface such that the force is distributed essentially uniformly over the circumference of the tensioning device. The spherical segment surface thus provides a type of joint function which enables the injection housing to be automatically and optimally aligned with respect to the base body during the assembly of the fuel injection device.
Da die Flächenpressung im Kontaktbereich zwischen Basiskörper und Einspritzgehäuse vergleichmäßigt ist, ist das Auftreten von undichten Stellen in diesem Kontaktbereich weniger wahrscheinlich. Darüber hinaus ist die Wahrscheinlichkeit von Verformungen des Einspritzgehäuses ebenfalls geringer, so dass die Einspritzmenge von einer Kraftstoff-Einspritzvorrichtung zur anderen - wenn überhaupt - weniger variiert.Since the surface pressure in the contact area between the base body and the injection housing is even, the occurrence of leaks in this contact area is less likely. In addition, the likelihood of deformation of the injection housing is also less, so that the injection quantity varies from one fuel injector to another less, if at all.
Vorteilhafte Weiterbildungen der Erfindung sind in Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.
In einer ersten Weiterbildung ist genannt, dass die Spanneinrichtung eine zu der konvexen Kugelsegmentfläche komplementäre konkave Kugelsegmentfläche umfasst, an der die konvexe Kugelsegmentfläche flächig anliegt. Hierdurch wird eine Art "Kugelpfannen-Kugelkopf-Gelenk" geschaffen. In diesem Fall erfolgt das Ausrichten des Einspritzgehäuses gegenüber dem Basiskörper bei der Montage der Kraftstoff - Einspritzvorrichtung besonders kraftarm und leicht. Dies führt zu einer besonders gleichmäßigen Flächenpressung an der Verbindungsstelle zwischen Basiskörper und Einspritzgehäuse .In a first development it is mentioned that the tensioning device comprises a concave spherical segment surface complementary to the convex spherical segment surface, against which the convex spherical segment surface lies flat. This creates a kind of "ball socket ball head joint". In this case, the alignment of the injection housing with respect to the base body is particularly low-power and light when the fuel injection device is installed. This leads to a particularly uniform surface pressure at the connection point between the base body and the injection housing.
Möglich ist aber auch, dass die Spanneinrichtung eine der konvexen Kugelsegmentfläche zugewandte schräge und ebene Ringfläche aufweist, an der die Kugelsegmentfläche linienhaft anliegt. Eine derartige schräge Ringfläche ist leicht herzustellen und ermöglicht die preiswerte Fertigung der erfindungsgemäßen Kraftstoff-Einspritzvorrichtung .But it is also possible that the clamping device is one of the has convex spherical segment surface facing oblique and flat ring surface on which the spherical segment surface lies linearly. Such an inclined annular surface is easy to manufacture and enables the fuel injector according to the invention to be manufactured inexpensively.
Besonders bevorzugt ist dabei, dass die schräge Ringfläche einen Winkel von ungefähr 120° einschließt. Bei einem solchen Winkel werden die für eine sichere Verbindung und Abdichtung erforderlichen axialen Kräfte noch gut übertragen, und andererseits bietet eine solche Schräge einen guten Sitz für die konvexe Kuge1segmentflache .It is particularly preferred that the oblique ring surface encloses an angle of approximately 120 °. At such an angle, the axial forces required for a secure connection and sealing are still well transmitted, and on the other hand, such an incline offers a good fit for the convex spherical segment surface.
Besonders bevorzugt ist, wenn die Spanneinrichtung eine Ringscheibe umfasst, welche zwischen dem Einspritzgehäuse und der Spannmutter angeordnet ist, wobei entweder die konvexe oder die konkave Kugelsegmentfläche oder die schräge Ringfläche an der Ringscheibe ausgebildet ist . Eine derartige Ringscheibe ermöglicht beispielsweise die Verwendung einer üblichen Spannmutter, was die Herstellkosten der erfindungsgemäßen Kraftstoff- Einspritzvorrichtung niedrig hält. Alternativ kann aber auch das Einspritzgehäuse eine übliche Ringschulter aufweisen, an der also weder eine Schräge noch eine Kugelsegmentfläche vorhanden ist, wenn die erfindungsgemäße Ringscheibe vorgesehen wird.It is particularly preferred if the clamping device comprises an annular disk which is arranged between the injection housing and the clamping nut, either the convex or the concave spherical segment surface or the oblique annular surface being formed on the annular disk. Such an annular disc enables, for example, the use of a conventional clamping nut, which keeps the manufacturing costs of the fuel injection device according to the invention low. Alternatively, however, the injection housing can also have a conventional ring shoulder, on which there is therefore neither a bevel nor a spherical segment surface if the ring disk according to the invention is provided.
Bevorzugt ist jedoch, wenn die konvexe Kugelsegmentfläche an der Ringschulter des Einspritzgehäuses ausgebildet ist . Beim Einspritzgehäuse handelt es sich ohnehin um ein relativ komplexes Teil, an dem der zusätzliche Bearbeitungsschritt einen vergleichsweise nur geringen Zusatzaufwand bedeutet.However, it is preferred if the convex spherical segment surface is formed on the ring shoulder of the injection housing. In any case, the injection housing is a relatively complex part, on which the additional processing step means comparatively little additional effort.
Das Ausrichten des Einspritzgehäuses gegenüber dem Basiskörper wird nochmals erleichtert, wenn die konvexe Kugelsegmentfläche und die mit dieser zusammenarbeitende konkave Kugelsegmentfläche oder die schräge Ringfläche mit einer reibungsarmen Schicht, vorzugsweise Teflon, versehen sind.Alignment of the injection housing with respect to the base body is made even easier if the convex Spherical segment surface and the concave spherical segment surface cooperating with this or the oblique ring surface are provided with a low-friction layer, preferably Teflon.
Zeichnungdrawing
Nachfolgend werden Ausführungsbeispiele der Erfindung unter Bezugnahme auf die beiliegende Zeichnung im Detail erläutert. In der Zeichnung zeigen:Exemplary embodiments of the invention are explained in detail below with reference to the accompanying drawing. The drawing shows:
Fig. 1: einen teilweisen Längsschnitt durch ein erstes Ausführungsbeispiel einer Kraftstoff- Einspritzvorrichtung mit einer Spannmutter und einer Ringscheibe;1: a partial longitudinal section through a first exemplary embodiment of a fuel injection device with a clamping nut and an annular disk;
Fig. 2: einen Schnitt durch die Ringscheibe derFig. 2: a section through the washer
Kraftstoff -Einspritzvorrichtung von Fig. 1 ;Fuel injector of Fig. 1;
Fig. 3: eine Draufsicht auf die Spannmutter derFig. 3: a plan view of the clamping nut of the
Kraftstoff-Einspritzvorrichtung von Fig. 1;Fuel injector of Fig. 1;
Fig. 4: einen teilweisen Längsschnitt bzw. eineFig. 4: a partial longitudinal section or a
Seitenansicht der Spannmutter der Kraftstoff- Einspritzvorrichtung von Fig. 1;Side view of the clamping nut of the fuel injector of Fig. 1;
Fig. 5: einen Schnitt längs der Linie V-V von Fig. 4;Fig. 5: a section along the line V-V of Fig. 4;
Fig. 6: eine Ansicht ähnlich Fig. 1 eines zweiten Ausführungsbeispiels einer Kraftstoff- Einspritzvorrichtung mit einer Spannmutter und einer Ringscheibe;6: a view similar to FIG. 1 of a second exemplary embodiment of a fuel injection device with a clamping nut and an annular disk;
Fig. 7: eine Draufsicht auf die Ringscheibe derFig. 7: a plan view of the washer
Kraftstoff-Einspritzvorrichtung von Fig. 6; Fig. 8: einen Schnitt längs der Linie IX- IX von Fig. 7; und6 fuel injector; Fig. 8: a section along the line IX-IX of Fig. 7; and
Fig. 9: einen Längsschnitt durch einen Bereich derFig. 9: a longitudinal section through an area of
Spannmutter der Kraftstoff -Einspritzvorrichtung von Fig. 6.6 of the fuel injector of FIG. 6.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In Fig. 1 trägt eine Kra tstoff -Einspritzvorrichtung insgesamt das Bezugszeichen 10. Sie unmfasst einen Basiskörper 12, ein Einspritzgehäuse 14 sowie eine Spannmutter 16. Am Basiskörper 12 ist ein Gewinde 18 vorhanden, mit dem die Spannmutter 16 verschraubt ist. Im Einspritzgehäuse 14 ist eine in dessen Längsrichtung verlaufende Ausnehmung 20 vorhanden, in der eine Ventilnadel 22 angeordnet ist. Ein Kraftstoff-Einlass 24 versorgt einen Ringraum 26 zwischen Ventilnadel 22 und Ausnehmung 20 mit Kraftstoff. Durch eine axiale Bewegung der Ventilnadel 22 können in der Figur nicht dargestellte Kraftstoff-Austrittsöffnungen mit dem Ringraum 26 verbunden werden, so dass von der Kraftstoff-Einspritzvorrichtung 10 Kraftstoff abgegeben wird.In Fig. 1, a fuel injection device bears the overall reference number 10. It includes a base body 12, an injection housing 14 and a clamping nut 16. On the base body 12 there is a thread 18 with which the clamping nut 16 is screwed. In the injection housing 14 there is a recess 20 running in the longitudinal direction thereof, in which a valve needle 22 is arranged. A fuel inlet 24 supplies an annular space 26 between the valve needle 22 and the recess 20 with fuel. Axial movement of the valve needle 22 allows fuel outlet openings (not shown in the figure) to be connected to the annular space 26, so that fuel is emitted from the fuel injection device 10.
Die Kraftstoff-Einspritzvorrichtung 10 dient im Allgemeinen zum Einspritzen von Kraftstoff direkt in den Brennraum einer Brennkraftmaschine. Mit ihr kann Benzin- oder Dieselkraftstoff eingespritzt werden.The fuel injection device 10 is generally used to inject fuel directly into the combustion chamber of an internal combustion engine. It can be used to inject gasoline or diesel fuel.
Bei der Spannmutter 16 (vgl. Fig. 3 - 5) handelt es sich um ein hohlzylindrisches Teil, welches einen Wandabschnitt 30 und einen an dessen in Fig. 1 unterem Ende angeformten radial nach innen weisenden Ringsteg 32 umfasst. Die in Fig. 1 obere Oberfläche 33 des Ringstegs 32 und die innere Oberfläche des Wandabschnitts 30 liegen in einem Winkel von ungefähr 90° zueinander. Das Einspritzgehäuse 14 weist einen Abschnitt 34 mit größerem und einen Abschnitt 36 mit kleinerem Durchmesser auf. Der Durchmesser des Abschnitts 36 mit kleinerem Durchmesser ist etwas kleiner als der Durchmesser der vom Ringsteg 32 der Spannmutter 16 begrenzten Öffnung 38. Der Durchmesser des Abschnitts 34 des Einspritzgehäuses 14 ist etwas kleiner als der Innendurchmesser des Wandabschnitts 30 der Spannmutter 16.The clamping nut 16 (cf. FIGS. 3-5) is a hollow cylindrical part which comprises a wall section 30 and an annular web 32 pointing radially inwards on its lower end which is formed in FIG. 1. The upper surface 33 of the annular web 32 in FIG. 1 and the inner surface of the wall section 30 lie at an angle of approximately 90 ° to one another. The injection housing 14 has a section 34 with a larger and a section 36 with a smaller diameter. The diameter of the section 36 with a smaller diameter is somewhat smaller than the diameter of the opening 38 delimited by the ring web 32 of the clamping nut 16. The diameter of the section 34 of the injection housing 14 is somewhat smaller than the inside diameter of the wall section 30 of the clamping nut 16.
Zwischen dem Abschnitt 34 und dem Abschnitt 36 des Einspritzgehäuses 14 ist eine Ringschulter 40 gebildet. Die Ringschulter 40 ist in der Art einer Kugelsegmentfläche 41 konvex gekrümmt. Der Mittelpunkt M der Kugelsegmentfläche 41 liegt auf der Längsachse 42 der Kraftstoff- Einspritzvorrichtung 10. Der Radius der Kugel, aus welcher die Kugelsegmentfläche 41 ausgeschnitten ist, beträgt R.An annular shoulder 40 is formed between the section 34 and the section 36 of the injection housing 14. The ring shoulder 40 is convexly curved in the manner of a spherical segment surface 41. The center M of the spherical segment surface 41 lies on the longitudinal axis 42 of the fuel injection device 10. The radius of the sphere from which the spherical segment surface 41 is cut out is R.
Zwischen dem Ringsteg 32 der Spannmutter 16 und der Ringschulter 40 am Einspritzgehäuse 14 ist eine Ringscheibe 44 vorhanden (vgl. Fig. 2) . Der Innendurchmesser der Ringscheibe 44 ist etwas größer als der Außendurchmesser des Abschnitts 36 des Einspritzgehäuses 14, wohingegen der Außendurchmesser der Ringscheibe 44 etwas kleiner ist als der Innendurchmesser des Wandabschnitts 30 der Spannmutter 16. Die Oberseite 45 der Ringscheibe 44 ist als konkave Kugelsegmentfläche 46 ausgebildet, welche zu der konvexen Kugelsegmentfläche 41 am Einspritzgehäuse 14 komplementär ist. Die Unterseite der Ringscheibe 44 weist eine konische Einsenkung auf .An annular disk 44 is present between the ring web 32 of the clamping nut 16 and the annular shoulder 40 on the injection housing 14 (cf. FIG. 2). The inside diameter of the ring disk 44 is slightly larger than the outside diameter of the section 36 of the injection housing 14, whereas the outside diameter of the ring disk 44 is slightly smaller than the inside diameter of the wall section 30 of the clamping nut 16. The upper side 45 of the ring disk 44 is designed as a concave spherical segment surface 46, which is complementary to the convex spherical segment surface 41 on the injection housing 14. The underside of the washer 44 has a conical depression.
Der Radius der Kugel, aus welcher die konkave Kugelsegmentfläche 46 ausgeschnitten ist, beträgt somit ebenfalls R, und der Mittelpunkt M dieser Kugel liegt ebenfalls auf der Längsachse 42 der Kraftstoff- Einspritzvorrichtung 10. Beide Kugelsegment lächen 41 und 46 sind mit einer reibungsarmen Teflonschicht (nicht sichtbar) versehen. Die Kugelsegmentflächen 41 und 46 arbeiten somit in der Art eines Kugelpfannen-Kugelkopf - Gelenks zusammen. Die Spannmutter 16 mit dem Ringsteg 32, die Ringschulter 40 am Einspritzgehäuse 14 und die Ringscheibe 44 bilden insgesamt eine Spanneinrichtung 48.The radius of the ball, from which the concave spherical segment surface 46 is cut out, is thus also R, and the center M of this ball also lies on the longitudinal axis 42 of the fuel injector 10. Both spherical segment surfaces 41 and 46 are coated with a low-friction Teflon layer (not visible). The spherical segment surfaces 41 and 46 thus work together in the manner of a ball socket ball head joint. The clamping nut 16 with the ring web 32, the ring shoulder 40 on the injection housing 14 and the ring disk 44 form a clamping device 48 overall.
Die Montage der Kraftstoff-Einspritzvorrichtung 10 mittels der Spanneinrichtung 48 geht folgendermaßen vor sich:The assembly of the fuel injection device 10 by means of the tensioning device 48 proceeds as follows:
Zunächst wird die Ringscheibe 44 von unten über den Abschnitt 36 des Einspritzgehäuses 14 übergeschoben. Dabei weist die konkave Kugelsegmentfläche 46 der Ringscheibe 44 nach oben, also auf die Ringschulter 40 des Einspritzgehäuses 14 zu. Dann wird die Spannmutter 16 über das Einspritzgehäuse 14 übergeschoben, wobei der Ringsteg 32 unten angeordnet ist. Die Spannmutter 16 wird nun mit dem Gewinde 18 am Basiskörper 12 verschraubt.First, the washer 44 is pushed over the section 36 of the injection housing 14 from below. The concave spherical segment surface 46 of the annular disc 44 faces upward, that is to say to the annular shoulder 40 of the injection housing 14. Then the clamping nut 16 is pushed over the injection housing 14, the annular web 32 being arranged at the bottom. The clamping nut 16 is now screwed onto the base body 12 with the thread 18.
Dabei kommt ein in Fig. 1 von der Spannmutter 16 verdeckter Bereich des Einspritzgehäuses 14 an einen in Fig. 1 ebenfalls verdeckten Bereich des Basiskörpers 12 in Anlage. Gegebenenfalls kann zwischen beiden Teilen auch ein Dichtelement, beispielsweise ein O-Ring, vorhanden sein. Beim Festziehen der Spannmutter 16 am Basiskörper 12 richtet sich das Einspritzgehäuse 14 gegenüber dem Basiskörper 12 so aus, dass die Flächenpressung an der Dichtfläche zwischen Einspritzgehäuse 14 und Basiskörper 12 ungefähr gleichmäßig ist.In this case, an area of the injection housing 14 which is covered by the clamping nut 16 in FIG. 1 comes into contact with an area of the base body 12 which is also covered in FIG. 1. If necessary, a sealing element, for example an O-ring, can also be present between the two parts. When tightening the clamping nut 16 on the base body 12, the injection housing 14 is aligned with respect to the base body 12 in such a way that the surface pressure on the sealing surface between the injection housing 14 and the base body 12 is approximately uniform.
Dies ist dadurch möglich, dass die Kugelsegmentfläche 46 einerseits und die Kugelsegmentfläche 41 andererseits in der Art eines Kugelpfannen-Kugelkopf-Gelenks zusammenarbeiten und somit die axiale Ausrichtung der Spannmutter 16 und des Einspritzgehäuses 14 voneinander entkoppelt ist. Planlauftoleranzen am Gewinde 18 des Basiskörpers 12 sowie an dem in Fig. 1 nicht sichtbaren Innengewinde der Spannmutter 16 haben somit keine Auswirkungen mehr auf die Ausrichtung des Einspritzgehäuses 14.This is possible because the spherical segment surface 46 on the one hand and the spherical segment surface 41 on the other hand work together in the manner of a ball socket ball-and-socket joint and the axial alignment of the clamping nut 16 and the injection housing 14 is thus decoupled from one another. Flattening tolerances on the thread 18 of the base body 12 and on that which is not visible in FIG. 1 Internal threads of the clamping nut 16 therefore no longer have any effect on the alignment of the injection housing 14.
Nun wird auf ein zweites Ausführungsbeispiel einer Kraftstoff -Einspritzvorrichtung Bezug genommen, welches in den Fig. 6 - 9 dargestellt ist. Dabei tragen solche Teile und Elemente, welche äquivalente Funktionen zu der in den Fig. 1 - 5 dargestellten Kraftstoff-Einspritzvorrichtung aufweisen, die gleichen Bezugszeichen und sind nicht nochmals im Detail erläutert.Reference is now made to a second exemplary embodiment of a fuel injection device, which is illustrated in FIGS. 6-9. Parts and elements which have functions equivalent to the fuel injection device shown in FIGS. 1-5 have the same reference numerals and are not explained again in detail.
Im Unterschied zu der in den Fig. 1 - 5 dargestellten Kraftstoff-Einspritzvorrichtung 10 ist die in Fig. 6 nach oben weisende Oberfläche des Ringstegs 32 der Spannmutter 16 als schräge Ringfläche 50 ausgebildet. Die schräge Ringfläche 50 schließt dabei einen Winkel von ungefähr 120° ein (vgl. Fig. 9) . Die Ringschulter 40 des Einspritzgehäuses 14 ist in dem vorliegenden Ausführungsbeispiel nicht konvex gekrümmt, sondern erstreckt sich vom Abschnitt 36 mit kleinerem Durchmesser des Einspritzgehäuses 14 geradlinig und in einem Winkel von ungefähr 90° radial nach außen. Die Ringscheibe 44 wiederum weist auf ihrer Unterseite eine Ringfläche auf, die in der Art einer Kugelsegmentfläche 41 konvex gekrümmt ist. Die Oberseite 45 der Ringscheibe 44 weist eine Einsenkung auf.In contrast to the fuel injection device 10 shown in FIGS. 1-5, the surface of the ring web 32 of the clamping nut 16 pointing upwards in FIG. 6 is designed as an oblique ring surface 50. The oblique ring surface 50 encloses an angle of approximately 120 ° (cf. FIG. 9). In the present exemplary embodiment, the annular shoulder 40 of the injection housing 14 is not convexly curved, but extends straight from the section 36 with a smaller diameter of the injection housing 14 and at an angle of approximately 90 ° radially outwards. The annular disk 44 in turn has an annular surface on its underside which is convexly curved in the manner of a spherical segment surface 41. The top 45 of the annular disc 44 has a depression.
Bei dem in den Fig. 6 - 9 dargestellten Ausführungsbeispiel wird die Entkopplung der Ausrichtung der Spannmutter 16 einerseits und der Ausrichtung des Einspritzgehäuses 14 andererseits also durch die schräge Ringfläche 50 und die mit dieser zusammenarbeitenden konvexen Kugelsegmentfläche 41 erzielt. In the exemplary embodiment shown in FIGS. 6-9, the decoupling of the alignment of the clamping nut 16 on the one hand and the alignment of the injection housing 14 on the other hand is thus achieved by the oblique ring surface 50 and the convex spherical segment surface 41 cooperating therewith.

Claims

Ansprüche Expectations
1. Kraftstoff-Einspritzvorrichtung (10), insbesondere Injektor, für Brennkraftmaschinen, mit einem Basiskörper (12) , mit einem Einspritzgehäuse (14) , mit einer1. Fuel injection device (10), in particular injector, for internal combustion engines, with a base body (12), with an injection housing (14), with a
Spanneinrichtung (48) , welche mindestens eine Spannmutter (16) mit einem Ringsteg (32) und eine Ringschulter (40) am Einspritzgehäuse (14) umfasst und welche das Einspritzgehäuse (14) axial mit dem Basiskörper (12) verspannt, mit einem Kra tstoff-Einlass (24), und mit mindestens einem Ventilelement (22), dadurch gekennzeichnet, dass die Spanneinrichtung (48) mindestens eine dem Ringsteg (32) der Spannmutter (16) zugewandte Ringfläche aufweist, die in der Art einer Kugelsegmentfläche (41) konvex gekrümmt ist.Clamping device (48) which comprises at least one clamping nut (16) with an annular web (32) and an annular shoulder (40) on the injection housing (14) and which braces the injection housing (14) axially with the base body (12) with a fuel -Inlet (24), and with at least one valve element (22), characterized in that the clamping device (48) has at least one ring surface facing the ring web (32) of the clamping nut (16), which is convex in the manner of a spherical segment surface (41) is curved.
2. Kraftstoff -Einspritzvorrichtung (10) nach Anspruch 1, dadurch gekennzeichnet, dass die Spanneinrichtung (48) eine zu der konvexen Kugelsegmentfläche (41) komplementäre konkave Kugelsegmentfläche (46) umfasst, an der die konvexe Kugelesegmentflache (41) flächig anliegt.2. Fuel injection device (10) according to claim 1, characterized in that the clamping device (48) comprises a complementary to the convex spherical segment surface (41) concave spherical segment surface (46) on which the convex spherical segment surface (41) lies flat.
3. Kraftstoff -Einspritzvorrichtung (10) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Spanneinrichtung (48) eine der konvexen Kugelsegmentfläche (41) zugewandte schräge und ebene Ringfläche (50) aufweist, an der die Kugelsegmentfläche (41) linienhaft anliegt. 3. Fuel injection device (10) according to one of claims 1 or 2, characterized in that the clamping device (48) has an oblique and flat annular surface (50) facing the convex spherical segment surface (41), on which the spherical segment surface (41) is linear is applied.
4. Kraftstoff-Einspritzvorrichtung (10) nach Anspruch 3, dadurch gekennzeichnet, dass die schräge Ringfläche (50) einen Winkel von ungefähr 120° einschließt.4. Fuel injection device (10) according to claim 3, characterized in that the inclined annular surface (50) encloses an angle of approximately 120 °.
5. Kraftstoff-Einspritzvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Spanneinrichtung (48) eine Ringscheibe (44) umfasst, welche zwischen dem Einspritzgehäuse (14) und der Spannmutter (16) angeordnet ist, wobei entweder die konvexe Kugelsegmentfläche (41) oder die konkave Kugelsegmentfläche5. Fuel injection device (10) according to one of the preceding claims, characterized in that the clamping device (48) comprises an annular disc (44) which is arranged between the injection housing (14) and the clamping nut (16), either the convex Spherical segment surface (41) or the concave spherical segment surface
(46) oder die schräge Ringfläche an der Ringscheibe (44) ausgebildet ist.(46) or the oblique ring surface on the annular disc (44) is formed.
6. Kraftstoff -Einspritzvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die konvexe Kugelsegmentfläche (41) an der Ringschulter (40) des Einspritzgehäuses (14) ausgebildet ist.6. Fuel injection device (10) according to one of the preceding claims, characterized in that the convex spherical segment surface (41) on the annular shoulder (40) of the injection housing (14) is formed.
7. Kraf stoff-Einspritzvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die konvexe Kugelsegmentfläche (41) und die mit dieser zusammenarbeitende konkave ' Kugelsegmentfläche (46) oder die schräge Ringfläche (50) mit einer reibungsarmen Schicht, vorzugsweise aus Teflon, versehen sind. 7. Kraf substance injection device (10) according to any one of the preceding claims, characterized in that the convex spherical segment surface (41) and the concave ' spherical segment surface (46) cooperating therewith or the oblique annular surface (50) with a low-friction layer, preferably from Teflon.
EP02726070.2A 2001-03-28 2002-03-22 Fuel injection device, especially injector, for internal combustion engines Expired - Lifetime EP1373713B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10115352 2001-03-28
DE10115325A DE10115325A1 (en) 2001-03-28 2001-03-28 Fuel injector, for an IC motor, has a clamp system to hold the injector housing at the base body, with a convex curvature in a ball segment shape at the clamping surface for an increased sealing action
PCT/DE2002/001040 WO2002077443A1 (en) 2001-03-28 2002-03-22 Fuel injection device, especially injector, for internal combustion engines

Publications (3)

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EP1373713A1 true EP1373713A1 (en) 2004-01-02
EP1373713B1 EP1373713B1 (en) 2009-07-01
EP1373713B2 EP1373713B2 (en) 2013-07-03

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US (1) US6994280B2 (en)
EP (1) EP1373713B2 (en)
JP (1) JP4210522B2 (en)
DE (2) DE10115325A1 (en)
WO (1) WO2002077443A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022179812A1 (en) * 2021-02-24 2022-09-01 Robert Bosch Gmbh Combustion chamber gasket for a fuel injector, and internal combustion engine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002242796A (en) * 2001-02-14 2002-08-28 Denso Corp Fuel injection nozzle
DE10149514A1 (en) * 2001-10-08 2003-04-24 Bosch Gmbh Robert Fuel injector for IC engine fuel injection system, has deformable compensation sleeve for compensation of skew between coupled components
GB0603056D0 (en) * 2006-02-15 2006-03-29 Delphi Tech Inc Fuel injector
JP2008232120A (en) * 2007-03-23 2008-10-02 Denso Corp Fuel injection valve
DE102012217991A1 (en) 2012-10-02 2014-04-03 Continental Automotive Gmbh Nozzle assembly for a fluid injector and fluid injector

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE490743C (en) † 1927-09-13 1930-01-31 Ove Petersen Fuel injection valve for airless injection in internal combustion engines
GB669110A (en) † 1948-06-04 1952-03-26 Burmeister & Wains Mot Mask Improvements in or relating to fuel injection nozzles for internal combustion engines
CH296118A (en) † 1951-10-13 1954-01-31 Saurer Ag Adolph Injection nozzle for internal combustion engines.
US3412718A (en) † 1967-06-13 1968-11-26 Gillett Tool Co Precision fuel metering system
DE2032005A1 (en) † 1970-06-29 1972-01-05 Robert Bosch Gmbh, 7000 Stuttgart Fuel injector
DD141832A1 (en) * 1978-10-31 1980-05-21 Joachim Schmidt METHOD AND DEVICE FOR PREPARING L-ASCORBIN ACID
JPH0660609B2 (en) * 1986-03-07 1994-08-10 工業技術院長 Fuel injection nozzle body of diesel engine
JPH06221258A (en) 1993-01-27 1994-08-09 Mazda Motor Corp Forced ignition type direct injection diesel engine
JPH08200182A (en) † 1995-01-25 1996-08-06 Zexel Corp Electromagnetic type fuel injection valve and mounting structure thereof
DE19508636A1 (en) * 1995-03-10 1996-09-12 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE19523243B4 (en) * 1995-06-27 2009-04-02 Robert Bosch Gmbh Fuel injection valve for internal combustion engines with a clamping nut with a conically formed annular shoulder
JPH09112697A (en) † 1995-10-17 1997-05-02 Mitsubishi Electric Corp Seal ring
DE19608574A1 (en) † 1996-03-06 1997-09-11 Bosch Gmbh Robert Fuel supply device
GB2311558A (en) * 1996-03-28 1997-10-01 Stanadyne Automotive Corp Fuel injection nozzle with compressive radial pre-loading
DE19705227A1 (en) 1997-02-12 1998-08-13 Bosch Gmbh Robert High pressure fuel injector
DE19735665A1 (en) * 1997-06-25 1999-01-07 Bosch Gmbh Robert Fuel injection system
DE19729843A1 (en) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Fuel injector
IT1306311B1 (en) † 1998-07-01 2001-06-04 Magneti Marelli Spa COUPLING SYSTEM BETWEEN ENGINE HEAD, INJECTOR AND FUEL COLLECTOR.
DE29814934U1 (en) * 1998-08-20 2000-01-05 Robert Bosch Gmbh, 70469 Stuttgart Fuel injection valve for internal combustion engines
GB9819746D0 (en) * 1998-09-11 1998-11-04 Lucas Ind Plc Fuel injector
US6705647B1 (en) * 2000-11-22 2004-03-16 Strahman Valves, Inc. Fluid coupling device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02077443A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022179812A1 (en) * 2021-02-24 2022-09-01 Robert Bosch Gmbh Combustion chamber gasket for a fuel injector, and internal combustion engine

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WO2002077443A1 (en) 2002-10-03
DE10115325A1 (en) 2002-10-17
DE50213647D1 (en) 2009-08-13
JP4210522B2 (en) 2009-01-21
EP1373713B2 (en) 2013-07-03
US6994280B2 (en) 2006-02-07
EP1373713B1 (en) 2009-07-01
JP2004518888A (en) 2004-06-24
US20030173427A1 (en) 2003-09-18

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