EP1332281B1 - Installation d'injection de carburant - Google Patents

Installation d'injection de carburant Download PDF

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Publication number
EP1332281B1
EP1332281B1 EP01993758A EP01993758A EP1332281B1 EP 1332281 B1 EP1332281 B1 EP 1332281B1 EP 01993758 A EP01993758 A EP 01993758A EP 01993758 A EP01993758 A EP 01993758A EP 1332281 B1 EP1332281 B1 EP 1332281B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection unit
unit according
fuel
sleeve
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
EP01993758A
Other languages
German (de)
English (en)
Other versions
EP1332281A2 (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 EP1332281A2 publication Critical patent/EP1332281A2/fr
Application granted granted Critical
Publication of EP1332281B1 publication Critical patent/EP1332281B1/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
    • 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

Definitions

  • the invention relates to a fuel injection system for injecting fuel into an internal combustion engine, in particular for the direct injection of fuel into the combustion chamber or the combustion chambers of the internal combustion engine.
  • the invention relates to a fuel injection system according to the preamble of the main claim.
  • a fuel injection system is known from DE 197 25 076 A1. It has, for the sealing connection between a fuel injection valve and an associated connecting piece of a fuel distributor line in each case an annular seal carrier which is provided with a first sealing element for sealing the seal carrier relative to an end face of an inlet section of the fuel injection valve and a second sealing element for sealing the seal carrier relative to the connecting piece of the fuel distributor line interacts.
  • An insertable into a fuel inlet port of the inlet section bushing penetrates the annular seal carrier, so that the seal carrier between an upstream collar of Socket and the inlet portion of the fuel injection valve is movably locked in the radial direction.
  • a disadvantage of the arrangement described in the above publication is that two components are present by a total of two sealing elements, where errors can occur and it may come to leaks in particular.
  • the two sealing elements are mounted one above the other and therefore require height. Since the sealing elements can not lie directly against one another and sufficient material must be present in order to be able to mold the annular grooves, the additional height required for the seal carrier is not insignificant.
  • Another disadvantage of the arrangement described in the above publication is that the radial mobility of the seal carrier is only guaranteed if this still has a certain axial play and is not pressed by the bush against the inlet section. Consequently, the socket must be inserted during assembly with a well-defined depth in the fuel inlet opening and the socket as well as the fuel inlet opening in the fuel injection valve to be made very accurately.
  • JP-OS 08-312503 It is already known from JP-OS 08-312503 known to seal a usable in a receiving bore fuel injector having an inlet portion, sealed by an O-ring at this inlet portion relative to a connecting piece of a fuel distribution line. In this case, the O-ring is sealingly against an inner wall of the connecting piece.
  • a disadvantage of this known state of the art is that the positional variations of the fuel injection valve relative to the fuel distributor line occurring due to manufacturing tolerances, as far as the axes of the connecting piece of the fuel distributor line and of the fuel injection valve are shifted from each other, can be compensated only by unbalanced squeezing of the O-ring. Here it comes even at relatively low bruising of the O-ring leaks.
  • the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that positional deviations of the axes of the connecting piece of the fuel rail and the fuel injection valve are balanced against each other safely. An undesirable tension of the fuel injection valve relative to the fuel distributor line can be avoided. Above all, it is compared with the known ones. Gaskets that can compensate for tolerances, achieved a smaller size.
  • inner sleeve and outer sleeve are connected via spiral springs.
  • the seal carrier is fixed by a retaining ring on the guide portion of the fuel injection valve with its inner sleeve against the end face of the inlet section. Also remains favorable due to the elasticity of the sealing element under the action of pressurized fuel between the end face of the inlet section and the outer sleeve of the seal carrier, a gap. Even if the inner sleeve is pressed by manufacturing tolerances by the locking ring against the end face, the outer ring with the sealing element retains its functionality.
  • a hollow screw which is screwed into a threaded bore of the fuel injection valve and holds the seal carrier against the fuel injection valve.
  • the outer ring on an upstream radially outward, circumferential, tapered chamfer.
  • FIG. 1 shows a sectional representation of an inventive embodiment of a fuel injection system in a partial representation of the connection region between a fuel injector 1 and a Brenmstoffverteilertechnisch 2.
  • the fuel distribution line 2 is drawn here only in the region of a connecting piece 3 and the fuel injector 1 only in the region of an inlet section 4, which has a guide section 5.
  • the inlet section 4 is integrally formed with the fuel injection valve 1. At the transition of the inlet section 4 to the guide section 5, an end face 6 is formed.
  • a guide support 30 consists of an inner sleeve 8 and an outer sleeve 9, which radially surrounds the inner sleeve 8 and is elastically connected to the inner sleeve 8 via helically arranged leaf springs 10.
  • the inner sleeve 8 is penetrated and guided by the guide section 5.
  • a securing ring 11 the inner sleeve 8 is held in position and pressed against the end face 6 of the inlet section 4.
  • the retaining ring 11 is inserted into a circumferential groove 12 of the guide portion 5.
  • an O-ring 14 is used as a sealing element.
  • a dead space 15 formed between the outer sleeve 9 and the O-ring 14 is connected via a pressure equalization bore 16 with the fuel chamber 17 to be sealed.
  • the dead space 15 is formed between sealing edges 18,19 of the O-ring 14 with respect to the gradation 13 of the outer sleeve 9.
  • the outer sleeve 9 has at its upstream end on a circumferential conical taper 23.
  • a central axis 24 is drawn for clarity.
  • a central axis 25 is drawn through the connecting piece 3.
  • the outer sleeve 9 is connected to the inner sleeve 8 only elastically via the leaf springs 10, such that only small forces are transmitted in the axial direction. Regardless of whether and with what force the inner sleeve 8 is pressed against the end face 6, formed between outer sleeve 9 and end face 6, a gap b, the size of the elasticity of the O-ring 14 and the prevailing pressure in the fuel chamber 17 depends. As a result, the outer sleeve 9 is slightly radially displaceable. In conjunction with the chamfer 23, the outer sleeve 9 sets during assembly on the offset a. This is possible as long as the axial sealing edge 20 still rests completely on the end face 6.
  • the sealing effect of the O-ring 14 is enhanced by the pressure compensation bore 16.
  • the pressure equalization bore 16 of the O-ring 14 is also applied in the dead space 15 on its cross-sectional circumference between the sealing edges 18,19 to the outer sleeve 9 with fuel under pressure.
  • the contact pressure on the Axialdichtkante 20 and the peripheral sealing edge 21 is reinforced.
  • the outer sleeve 9 concentrically surrounds the inner sleeve 8. Both are elastically connected to each other via the leaf springs 26, which are directed radially outward and in the illustrated Training have a convolution.
  • the outer sleeve 9 concentrically surrounds the inner sleeve 8. Both are connected to each other via the leaf springs 27, which are directed radially outwardly formed as a spiral spring leaves.
  • Fig. 4 shows a further embodiment of a fuel injection system according to the invention in a detail corresponding to the detail IV of Fig. 1. Since the embodiment deviates from the embodiment only in this detail, as shown in Fig. 1, the same reference numerals are used for the same parts ,
  • the seal carrier 30 consists of the inner sleeve 8 and the outer sleeve 9, which comprises the inner sleeve 8 radially and is elastically connected to the inner sleeve 8 via helically arranged leaf springs 10.
  • a retaining ring 28 which is seated in the groove 12, holding the inner sleeve 8 and outer sleeve 9 against the end face 6.
  • the located in the gradation 13 of the outer sleeve 9 O-ring 14 is supported by a support ring 29 between the O-ring 14 and end face. 6 is arranged, supported.
  • the O-ring 14 is sealingly against the connecting piece 3.
  • the outer sleeve 9 is held more securely in position.
  • the O-ring 14 can be deformed more, without causing leaks.

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)

Claims (16)

  1. Installation d'injection de carburant pour injecter du carburant dans un moteur à combustion interne, comportant au moins un injecteur de carburant (1) muni d'un segment d'amenée (4) et une conduite de répartition de carburant munie pour chaque injecteur de carburant (1) d'une tubulure de liaison (3) qui peut être reliée au segment d'amenée (4), un support d'étanchéité annulaire (30) étant prévu pour assurer la liaison étanche de chaque injecteur de carburant (1) avec la tubulure de liaison (2) respective de la conduite de répartition de carburant (3),
    caractérisée en ce que
    le support d'étanchéité (30) comporte un manchon intérieur (8) qui est guidé par un segment de guidage (5) du segment d'amenée (4) et un manchon extérieur (9) qui entoure radialement le manchon intérieur (8) et est relié radialement de façon élastique au manchon intérieur (8), et le support d'étanchéité (30) entoure par le manchon extérieur (9) un élément d'étanchéité (14) et maintient appliqué l'élément d'étanchéité (14) aussi bien par son pourtour à une paroi intérieure (22) de la tubulure de liaison (3) qu'axialement à une surface frontale (6) radiale du segment d'amenée (4) de l'injecteur de carburant (1).
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    l'élément d'étanchéité (14) est guidé dans un gradin (13) - du manchon extérieur (9) - tourné vers l'injecteur de carburant (1).
  3. Installation d'injection de carburant selon la revendication 1 ou 2,
    caractérisée en ce que
    le manchon intérieur (8) et le manchon extérieur (9) sont reliés élastiquement par des ressorts.
  4. Installation d'injection de carburant selon la revendication 3,
    caractérisée en ce que
    les ressorts sont des ressorts à lames (10, 26, 27) placés en spirale entre le manchon intérieur (8) et le manchon extérieur (9).
  5. Installation d'injection de carburant selon la revendication 4,
    caractérisée en ce que
    les ressorts à lames (26) sont pliés.
  6. Installation d'injection de carburant selon l'une des revendications 1 à 5,
    caractérisée en ce que
    le manchon extérieur (9) comporte au moins un perçage de compensation de pression (16) qui relie une chambre de carburant (17) à étancher à un volume mort (15) formé entre des bords d'étanchéité (18, 19) de l'élément d'étanchéité (14) et le manchon extérieur (9).
  7. Installation d'injection de carburant selon l'une des revendications 1 à 6,
    caractérisée en ce que
    le support d'étanchéité (30) est fixé au segment de guidage (5) de l'injecteur de carburant (1) à l'aide d'une bague de retenue (11, 28), son manchon intérieur (8) s'appliquant contre la surface frontale (6) du segment d'amenée (4).
  8. Installation d'injection de carburant selon la revendication 7,
    caractérisée en ce que
    la bague de retenue (28) recouvre au moins partiellement le manchon extérieur (9).
  9. Installation d'injection de carburant selon la revendication 8,
    caractérisée en ce que
    la bague de retenue (28) comporte des perçages de compensation de pression ou des cannelures qui relient une chambre de carburant (17) à étancher à des perçages de compensation de pression (16) situés dans le manchon extérieur (9) et reliés à un volume mort (15) formé entre des bords d'étanchéité (18, 19) de l'élément d'étanchéité (14) et le manchon extérieur (9).
  10. Installation d'injection de carburant selon l'une des revendications 7 à 9,
    caractérisée en ce que
    la bague de retenue (11, 28) est soudée au segment de guidage (5).
  11. Installation d'injection de carburant selon l'une des revendications 7 à 9,
    caractérisée en ce que
    la bague de retenue (11, 28) est maintenue sur le segment de guidage (5) dans une rainure (12).
  12. Installation d'injection de carburant selon l'une des revendications 7 à 9,
    caractérisée en ce que
    la bague de retenue (11, 28) est maintenue sur le segment de guidage (5) par un boulon creux qui pénètre sous forme de taraudage dans un perçage d'amenée de carburant (7).
  13. Installation d'injection de carburant selon l'une des revendications 7 à 9,
    caractérisée en ce que
    du fait que l'élément d'étanchéité est élastique, même sous l'action de carburant sous pression un intervalle (b) subsiste entre la surface frontale (6) du segment d'amenée (4) et le manchon extérieur (9) du support d'étanchéité (30).
  14. Installation d'injection de carburant selon l'une des revendications 1 à 13,
    caractérisée en ce que
    l'élément d'étanchéité (14) prend la forme d'une garniture d'étanchéité périphérique.
  15. Installation d'injection de carburant selon l'une des revendications 1 à 14,
    caractérisée en ce que
    le manchon extérieur (9) présente à son extrémité en amont un biseau périphérique et conique placé radialement à l'extérieur.
  16. Installation d'injection de carburant selon l'une des revendications 1 à 15,
    caractérisée en ce que
    une bague de soutien (29) est disposée entre l'élément d'étanchéité (14) et la surface frontale (6) du segment d'amenée (4).
EP01993758A 2000-11-11 2001-11-12 Installation d'injection de carburant Expired - Lifetime EP1332281B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10056005 2000-11-11
DE10056005A DE10056005A1 (de) 2000-11-11 2000-11-11 Brennstoffeinspritzanlage
PCT/DE2001/004206 WO2002038943A2 (fr) 2000-11-11 2001-11-12 Installation d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1332281A2 EP1332281A2 (fr) 2003-08-06
EP1332281B1 true EP1332281B1 (fr) 2006-02-22

Family

ID=7662992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01993758A Expired - Lifetime EP1332281B1 (fr) 2000-11-11 2001-11-12 Installation d'injection de carburant

Country Status (6)

Country Link
US (1) US6701899B2 (fr)
EP (1) EP1332281B1 (fr)
JP (1) JP4021762B2 (fr)
DE (2) DE10056005A1 (fr)
ES (1) ES2257464T3 (fr)
WO (1) WO2002038943A2 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056038A1 (de) * 2000-11-11 2002-05-16 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE102007035714A1 (de) * 2007-07-30 2009-02-05 Robert Bosch Gmbh Brennstoff-Einspritzanlage mit Ausgleichselement
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
US8069842B2 (en) * 2009-07-02 2011-12-06 Robert Bosch Gmbh Injector mounting assembly
US20110265767A1 (en) * 2010-05-03 2011-11-03 Delphi Technologies, Inc. Isolater for fuel injector
DE102011082743A1 (de) * 2011-09-15 2013-03-21 Robert Bosch Gmbh Brennstoffverteiler
FR2997456B1 (fr) * 2012-10-30 2014-11-28 Delphi Technologies Holding Vanne haute pression
DE102013200993A1 (de) * 2013-01-22 2014-07-24 Robert Bosch Gmbh Brennstoffeinspritzanlage mit einer Brennstoff führenden Komponente, einem Brennstoffeinspritzventil und einer Aufhängung
DE102013222508B4 (de) * 2013-11-06 2023-07-27 Robert Bosch Gmbh Ventil zum Zumessen von unter Hochdruck stehendem Fluid
US10544771B2 (en) * 2017-06-14 2020-01-28 Caterpillar Inc. Fuel injector body with counterbore insert
US11174825B2 (en) * 2019-02-11 2021-11-16 Caterpillar Inc. Seal configuration for fuel injector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08312503A (ja) 1995-03-10 1996-11-26 Mitsubishi Motors Corp 固定対象物、特に筒内噴射型内燃機関用インジェクタの取付構造
US5752487A (en) * 1997-06-11 1998-05-19 Caterpillar Inc. Injector combustion gas seal
DE19725076A1 (de) * 1997-06-13 1998-12-17 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE19735665A1 (de) * 1997-06-25 1999-01-07 Bosch Gmbh Robert Brennstoffeinspritzanlage
JP2000018125A (ja) * 1998-07-01 2000-01-18 Mitsubishi Electric Corp 筒内噴射用燃料噴射弁

Also Published As

Publication number Publication date
EP1332281A2 (fr) 2003-08-06
US6701899B2 (en) 2004-03-09
DE10056005A1 (de) 2002-05-16
JP4021762B2 (ja) 2007-12-12
JP2004513293A (ja) 2004-04-30
DE50109021D1 (de) 2006-04-27
ES2257464T3 (es) 2006-08-01
US20030145831A1 (en) 2003-08-07
WO2002038943A3 (fr) 2002-08-15
WO2002038943A2 (fr) 2002-05-16

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