EP1332285B1 - Installation d'injection de carburant - Google Patents

Installation d'injection de carburant Download PDF

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Publication number
EP1332285B1
EP1332285B1 EP01993764A EP01993764A EP1332285B1 EP 1332285 B1 EP1332285 B1 EP 1332285B1 EP 01993764 A EP01993764 A EP 01993764A EP 01993764 A EP01993764 A EP 01993764A EP 1332285 B1 EP1332285 B1 EP 1332285B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
seal carrier
inlet section
injection system
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01993764A
Other languages
German (de)
English (en)
Other versions
EP1332285A1 (fr
Inventor
Uwe Liskow
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1332285A1 publication Critical patent/EP1332285A1/fr
Application granted granted Critical
Publication of EP1332285B1 publication Critical patent/EP1332285B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings

Definitions

  • the invention relates to a fuel injection system for Injecting fuel into an internal combustion engine, especially for the direct injection of fuel into the Combustion chamber or the combustion chambers of the internal combustion engine.
  • the invention is based on a fuel injection system according to the genus of claim 1.
  • Such Fuel injection system is from DE 197 25 076 A1 known. It points to the sealing connection between one Fuel injector and an associated Connection piece of a fuel distribution line in each case an annular seal carrier with a first Sealing element for sealing the seal carrier opposite an end face of an inlet section of the Fuel injector and with a second Sealing element for sealing the seal carrier opposite the connector of the fuel rail interacts.
  • One in a fuel inlet of the inlet section insertable socket penetrates the annular seal carrier, so that the Seal carrier between an upstream collar of the Socket and the inlet section of the fuel injector locked in a radial direction is.
  • a disadvantage of the in the above publication described arrangement is that through the socket additional component is required with low Tolerances. Since the radial mobility of the Seal carrier is only guaranteed if this is still one has some axial play and not against the bush the inlet section is pressed, the socket at the Installation with a precisely defined depth in the Fuel inlet opening can be used. This is a precisely manufactured cylinder surface of the bushing and one with a corresponding bore made as Fuel inlet opening necessary to ensure a tight fit of the Achieve jack, creating the game needed for the Seal carrier can be adjusted.
  • the fuel injection system according to the invention with the Features of claim 1 in contrast, the advantage that those used for sealing O-rings do not compensate for position and angle deviations have to compensate for a purely elastic deformation.
  • the O-rings are not deformed on one side.
  • Fuel injection system according to the invention over the The prior art has the advantage that the additional component the precise socket to be manufactured is saved. Further the fuel injector does not have to fit have manufactured inlet bore. This allows the Manufacturing costs of these parts reduced and the Manufacturing costs can be reduced accordingly.
  • first Sealing element in a first annular groove in one downstream, radially oriented end face of the Seal carrier is guided and on the end face of the Inlet section of the fuel injector radially is slidably movable.
  • first Sealing element in a first annular groove in the end face of the inlet section of the fuel injector is and on a downstream, radially oriented End face of the seal carrier can be moved in a radially sliding manner is.
  • the shape of the sealing element is simplified thereby.
  • the additional ring groove in the face of the Inlet section of the fuel injector is on the other hand, cheaper to manufacture, because in any case an accurate on components of the fuel injection valves Machining by turning is required.
  • the circlip on the Inlet section welded or in a groove of the Inlet section are kept. If the locking ring is in a groove is made, the manufacturing effort becomes significant simplified, since only when manufacturing the parts of the Fuel injector, which is always low Tolerances occur, pay attention to the position of this ring groove must become.
  • Fig. 1 shows an embodiment of the invention in a excerpt, cut representation. Is shown just the connection area between one Fuel injector 1 and a fuel rail 2.
  • the fuel rail 2 is only here Area of a connection piece 3 drawn.
  • the fuel injection valve 1 has an inlet section 4 with a guide section 5, which with the Inlet section 4 of the fuel injection valve 1 is molded in one piece.
  • An end face 6 is on the Inlet section 4 at the transition to the guide section 5 formed.
  • a seal carrier 9 is the Guide section 5 penetrated and between the inlet end face 6 of the inlet section 4 and one at the inlet end of the guide section 5 arranged, radially projecting locking ring 10 locked.
  • the locking ring 10 is on the Guide section 5 of the fuel injector 1 with an axial distance a shown for clarity arranged to the end face 6, so that the seal carrier 9 is slightly axially movable with a game b.
  • the Seal carrier 9 is therefore not between the Circlip 10 of the guide section 5 and the Inlet section 4 of the fuel injection valve 1 jammed, but in the radial direction within a Clarification also shown in the displacement range c radially movable.
  • the seal carrier 9 has at its downstream end one of the end face 6 of the inlet section 4 of the Fuel injector 1 opposite, radially aligned end face 11.
  • On the seal carrier 9 is a first circumferential annular groove 12 in the end face 11 trained in taking and managing a first Sealing element 13 in the form of an O-ring Sealing ring is used.
  • the first sealing element 13 serves as an axial seal and seals the seal carrier 9 compared to the inlet section 4 of the Fuel injector 1 from.
  • the first is Sealing element 13 on the end face 11 of the Inlet section 4 of the fuel injector 1 sliding movable.
  • the seal carrier 9 has on a wall 14 of the connecting piece 3 opposite surface 15 a second annular groove 16.
  • the second annular groove 16 is used Recording and guiding a second sealing element 17 in Form of a sealing ring designed as an O-ring.
  • the second sealing element 17 causes a radial seal and seals the seal carrier 9 against that Connection piece 3 from.
  • the second sealing element 17 is while sliding in the connecting piece 3.
  • the locking ring 10 can, if it is designed as an open ring, easily be assembled by using a suitable tool is spread and pushed over the guide section 5 becomes. Due to the internal stress of the locking ring 10 this is held in the annular groove 18. If the seal carrier 9 acted upon with the fuel pressure in the operating state is the target for the fuel pressure on the upstream side the entire upstream End face 6 of the seal carrier 9 up to its Outside diameter available. against that is Seal carrier 9 at its downstream end at best up to the first sealing element 13 the fuel pressure exposed because the radially outer area is sealed.
  • the seal carrier 9 is therefore with a effective, axial force component by the Fuel pressure applied to the seal carrier 9 in Direction on the fuel injector 1 presses.
  • the first sealing element 13 is therefore on the end face 6 of the inlet section 4 of the fuel injection valve 1 pressed so that there is a good sealing effect.
  • the annular seal carrier 9 advantageously enables both radial compensation and axial compensation Balance between the position of the inlet section 4 of the Fuel injector 1 and the position of the Connection piece 3.
  • the inlet section 4 of the Fuel injector 1 is like all parts of the Fuel injector 1 to manufacture exactly and can can be processed by turning.
  • the formation of a Guide section 5 with a recessed annular groove 18th represents a hardly significant additional effort. In particular, there is only one size, namely the distance a between the annular groove 18 and the end face 6 exactly observed. Compared to an additional component and one This means that the bore to be made to fit is significant Costs saved.
  • Fig. 2 shows another cheap embodiment of a Fuel injection system according to the invention in a excerpt, cut representation. Is shown as in Fig. 1 the connection area between one Fuel injector 19 and a fuel rail 20, of which only one connecting piece 21 is drawn is. The fuel injector 19 has one Inlet section 22, on the one piece Guide section 23 is formed.
  • An end face 24 is on the inlet section 22 on the Transition to the guide section 23 is formed.
  • the guide section 23 and the inlet section 22 penetrated by an inlet bore 26 for the fuel.
  • a seal carrier 27 is removed from the guide portion 23 penetrated and between the inlet-side end face 24 of the inlet section 22 and one at the inlet end of the guide section 23 arranged radially outward protruding locking ring 28 locked.
  • the Circlip 28 is shown in the example Embodiment by a circumferential weld 29 with the Guide section 23 connected.
  • the seal carrier 27 is due to the arrangement of the Circlip 28, corresponding to FIG. 1, not between the Circlip 28 of the guide portion 23 and the Inlet section 22 of fuel injector 19 jammed, but movable in the radial direction.
  • the Seal carrier 27 has one at its downstream end the end face 24 of the inlet section 22 of the Fuel injector 9 opposite, radially aligned end face 30.
  • first sealing element 32 in the form of a O-rings serves.
  • the first sealing element 32 seals the Seal carrier 27 slidably movable relative to the Inlet section 22 of the fuel injector 19.
  • the seal carrier 27 has one Wall 33 of the connecting piece 21 opposite The lateral surface 34 has a second annular groove 35.
  • the second Annular groove 35 becomes a second sealing element 36 in shape of an O-ring.
  • the second sealing element 36 seals the seal carrier radially and slidably 27 compared to the connecting piece 21.
  • This embodiment is particularly advantageous in that the seal carrier 27 is further simplified by the first annular groove 31 in the end face 24 of the Fuel injector 19 is located.
  • the first annular groove 31 is easier on the fuel injector 19 and less expensive to manufacture.
  • Fig. 3 shows a further embodiment of a Fuel injection system according to the invention in a detail corresponding to section III of Figure 1. Die Embodiment differs from that Fuel injection system 1 of FIG. 1 only in this Callout. Therefore, the same parts become the same Reference numerals used.
  • the seal carrier 9 is shown in section and shows the first annular groove 12 with the first sealing element 13.
  • the second sealing element 17 guided in the second annular groove 16 .
  • it is downstream of the second sealing element 17, which is designed as an O-ring is arranged, a support ring 37.
  • the inside diameter of the Support ring 37 is dimensioned so that it is not up to The reason of the second annular groove 16 is sufficient and therefore radial is mobile.
  • the outer diameter of the Seal carrier 9 are dimensioned smaller, and that Sealing element 17 can be exposed to larger angles of tilt without deforming inadmissibly.
  • seal carrier 9 Preferably upstream of the second Sealing element 17 out in the second annular groove 16 and an upper support ring with a larger outer diameter than the seal carrier 9 available.
  • the seal carrier 9 preferably instructs a radially circumferential at its upstream end conical bevel 38.

Landscapes

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

Claims (11)

  1. Installation d'injection de carburant dans un moteur à combustion interne comportant au moins un injecteur de carburant (1, 19) ayant un segment d'alimentation (4, 22) et une conduite de distribution de carburant (2, 20) munie pour chaque injecteur (1, 19) d'un ajutage de liaison (3, 21) destiné à être relié au segment d'alimentation (4, 22) de l'injecteur (1, 19),
    et pour assurer la liaison étanche du segment d'alimentation (4, 22) de chaque injecteur (1, 19) à l'ajutage de liaison (3, 21) de la conduite de distribution de carburant (2, 20) il est prévu un support de joint (9, 27) annulaire respectif coopérant par un premier segment d'étanchéité (13, 32) pour assurer l'étanchéité du support de joint d'étanchéité (9, 27) par rapport à une surface frontale (6, 24) du segment d'alimentation (4, 22) de l'injecteur (1, 19) et par un second élément d'étanchéité (17, 36) pour assurer l'étanchéité entre le support de joint d'étanchéité (9, 27) et l'ajutage de liaison (3, 21) de la conduite de distribution de carburant (2, 20),
    caractérisée en ce qu'
    un segment de guidage (5, 23) du segment d'alimentation (4, 22) traverse le support de joint d'étanchéité (9, 27) et
    en amont du support de joint d'étanchéité (9, 27) il est prévu un anneau de blocage (10, 28) sur le segment d'alimentation (4, 22) pour que le support de joint (9, 27) soit bloqué entre l'anneau de blocage (10, 28) et la surface frontale (6, 24) du segment d'alimentation (4, 22), en restant mobile dans la direction radiale.
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le premier élément d'étanchéité (13) est guidé dans une première gorge annulaire (12) dans la surface frontale (11) du support d'étanchéité (9), en aval, alignée radialement, et
    est mobile sur la surface frontale (6) du segment d'alimentation (4) de l'injecteur (1), en glissant radialement.
  3. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le premier élément d'étanchéité (32) est logé dans une première gorge annulaire (31) de la surface frontale (24) du segment d'alimentation (22) de l'injecteur de carburant (19) et peut glisser radialement sur la surface frontale (30) alignée radialement, en aval, du support de joint (27).
  4. Installation d'injection de carburant selon l'une des revendications 1 à 3,
    caractérisée par
    la disposition d'un anneau de blocage (10, 28) et en ce qu'il subsiste un intervalle (b) grâce à l'élasticité du premier élément d'étanchéité (13, 32) même soumise à l'action de carburant sous pression, intervalle entre la surface frontale (6, 24) du segment d'alimentation (4, 22) et la surface frontale (11, 30) du support de joint (9, 27).
  5. Installation d'injection de carburant selon l'une des revendications 1 à 4,
    caractérisée en ce que
    le second élément d'étanchéité (17, 36) est guidé dans une seconde gorge annulaire (16, 35) d'une surface-enveloppe (15, 34) du support de joint (9, 27), gorge alignée axialement, et la conduite distributrice de carburant (2, 20) est mobile en glissement axial sur la paroi (14, 33) de l'ajutage de liaison (3, 21).
  6. Installation d'injection de carburant selon la revendication 5,
    caractérisée en ce qu'
    en aval du second élément d'étanchéité (17), un joint d'appui inférieur (37) de plus grand diamètre extérieur que le support de joint (9) est logé dans une seconde gorge annulaire (16) en étant mobile librement dans la direction radiale.
  7. Installation d'injection de carburant selon l'une des revendications 5 ou 6,
    caractérisée en ce qu'
    en amont du second élément d'étanchéité (17), un joint d'appui inférieur de plus grand diamètre extérieur que le support de joint (9) est logé dans une seconde gorge annulaire (16) en étant mobile librement dans la direction radiale.
  8. Installation d'injection de carburant selon l'une des revendications 1 à 7,
    caractérisée en ce que
    le support de joint (9) comporte à son extrémité amont, une rampe (38) conique périphérique, dirigée radialement.
  9. Installation d'injection de carburant selon l'une des revendications 1 à 8,
    caractérisée en ce que
    l'anneau de blocage (28) est soudé sur le segment d'alimentation (22).
  10. Installation d'injection de carburant selon l'une des revendications 1 à 8,
    caractérisée en ce que
    l'anneau de blocage (10) est tenu dans une gorge (18) du segment d'alimentation (4).
  11. Installation d'injection de carburant selon l'une des revendications 1 à 10,
    caractérisée en ce que
    les joints d'étanchéité (13, 17, 32, 36) sont des joints annulaires périphériques.
EP01993764A 2000-11-11 2001-11-12 Installation d'injection de carburant Expired - Lifetime EP1332285B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10056038A DE10056038A1 (de) 2000-11-11 2000-11-11 Brennstoffeinspritzanlage
DE10056038 2000-11-11
PCT/DE2001/004207 WO2002038950A1 (fr) 2000-11-11 2001-11-12 Installation d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1332285A1 EP1332285A1 (fr) 2003-08-06
EP1332285B1 true EP1332285B1 (fr) 2004-06-16

Family

ID=7663019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01993764A Expired - Lifetime EP1332285B1 (fr) 2000-11-11 2001-11-12 Installation d'injection de carburant

Country Status (5)

Country Link
US (1) US7195003B2 (fr)
EP (1) EP1332285B1 (fr)
JP (1) JP4092197B2 (fr)
DE (2) DE10056038A1 (fr)
WO (1) WO2002038950A1 (fr)

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US7455050B2 (en) * 2006-12-13 2008-11-25 Delphi Technologies, Inc. O-ring retainer for a fuel injector in a fuel rail socket
US20090013968A1 (en) * 2007-07-09 2009-01-15 Keegan Kevin R Vapor recovery system for a direct injector fuel rail assembly
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EP2093413B1 (fr) * 2008-02-19 2011-01-12 Continental Automotive GmbH Dispositif de couplage
DE602008004620D1 (de) * 2008-02-19 2011-03-03 Continental Automotive Gmbh Kupplungsvorrichtung
EP2093414B1 (fr) * 2008-02-19 2011-07-20 Continental Automotive GmbH Dispositif de couplage
EP2112367B1 (fr) * 2008-04-23 2011-09-14 Continental Automotive GmbH Agencement de couplage et injecteur de carburant
US20090321536A1 (en) * 2008-06-30 2009-12-31 Caterpillar Inc. Piston having channel extending through piston head
EP2148082B1 (fr) * 2008-07-24 2011-10-19 Continental Automotive GmbH Arrangement de couplage pour une soupape d'injection et soupape d'injection
EP2208883B1 (fr) * 2009-01-19 2015-07-22 Continental Automotive GmbH Dispositif de couplage
US8069842B2 (en) * 2009-07-02 2011-12-06 Robert Bosch Gmbh Injector mounting assembly
DE102011087954A1 (de) * 2011-12-08 2013-06-13 Robert Bosch Gmbh Einspritzventil, insbesondere für eine Brennkraftmaschine
DE102013222508B4 (de) * 2013-11-06 2023-07-27 Robert Bosch Gmbh Ventil zum Zumessen von unter Hochdruck stehendem Fluid
DE102017108270B4 (de) * 2017-04-19 2023-11-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Dichtungskassette für einen Injektor einer Verbrennungskraftmaschine und Injektoranordnung für eine Verbrennungskraftmaschine
JP6962208B2 (ja) * 2018-01-17 2021-11-05 トヨタ自動車株式会社 密封構造
US11174825B2 (en) * 2019-02-11 2021-11-16 Caterpillar Inc. Seal configuration for fuel injector
DE102019216587A1 (de) * 2019-10-29 2021-04-29 Robert Bosch Gmbh Brennstoffeinspritzventil

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Also Published As

Publication number Publication date
JP2004513298A (ja) 2004-04-30
DE50102634D1 (de) 2004-07-22
EP1332285A1 (fr) 2003-08-06
US7195003B2 (en) 2007-03-27
WO2002038950A1 (fr) 2002-05-16
JP4092197B2 (ja) 2008-05-28
DE10056038A1 (de) 2002-05-16
US20050115546A1 (en) 2005-06-02

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