EP1373707A1 - Raccord pour raccorder une conduite de carburant a une soupape d'injection de carburant - Google Patents

Raccord pour raccorder une conduite de carburant a une soupape d'injection de carburant

Info

Publication number
EP1373707A1
EP1373707A1 EP02724121A EP02724121A EP1373707A1 EP 1373707 A1 EP1373707 A1 EP 1373707A1 EP 02724121 A EP02724121 A EP 02724121A EP 02724121 A EP02724121 A EP 02724121A EP 1373707 A1 EP1373707 A1 EP 1373707A1
Authority
EP
European Patent Office
Prior art keywords
fuel
connector
connecting piece
fuel line
connector according
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
EP02724121A
Other languages
German (de)
English (en)
Other versions
EP1373707B1 (fr
Inventor
Andreas Glaser
Jochen Staiger
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 EP1373707A1 publication Critical patent/EP1373707A1/fr
Application granted granted Critical
Publication of EP1373707B1 publication Critical patent/EP1373707B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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 connector according to the preamble of the main claim.
  • a connector to compensate for the position tolerance is required in many cases due to the installation situation between the fuel injector and the fuel supply line. This applies in particular to direct-injection internal combustion engines which supply fuel to several fuel injectors via a common fuel line, the so-called fuel rail.
  • a fuel injection system with one intermediate piece per injection valve is known;
  • the intermediate piece described has two different connections.
  • the intermediate piece On one side, the intermediate piece has a connecting piece which can be inserted into an opening in the fuel line.
  • a receiving opening is made in the intermediate piece, into which the connection side of the fuel injector can be inserted.
  • the receiving opening has in particular an inner one that is identical to the opening of the fuel line Geometry on.
  • the intermediate piece acts like an extension of the fuel injector or the connecting piece of the fuel line.
  • a circumferential shoulder is attached to the outside of the intermediate piece, with the aid of which the intermediate piece can be connected to the fuel line by means of a holding clip and secured against slipping out.
  • the intermediate piece is sealed by two sealing elements, which are usually designed as O-rings.
  • the first sealing element which serves to seal the intermediate piece from the fuel line, is arranged in a groove on the connecting piece of the intermediate piece.
  • the seal between the fuel injector and the intermediate piece is provided by a second sealing element arranged on the fuel injector.
  • a disadvantage of the intermediate piece described is the need to fix the intermediate piece to the fuel rail with a retaining clip. This requires not only an additional step in the assembly of the internal combustion engine, but also additional parts. Another disadvantage of assembly is that the intermediate piece must be used in an oriented manner.
  • the limited elasticity of the retaining clip leads to the fact that when the intermediate piece is tilted relative to the fuel line, the intermediate piece is acted upon unevenly with force, so that the sealing element can be crushed and finally the sealing element can fail.
  • a further disadvantage is that an additional clamping claw is required in order to fasten the fuel injection valve in the cylinder head of the internal combustion engine.
  • the intermediate piece cannot transmit any axial forces and can only compensate for positional tolerances to a limited extent due to the restricted mobility.
  • Fuel rails lead to temperature fluctuations, which • can occur during the operation of an internal combustion engine, to relatively large changes in the length of the fuel line and thus, in particular in the case of long fuel rails, to changes in the position of the connecting pieces, which cannot be compensated.
  • the connector according to the invention with the characterizing features of the main claim has the advantage that a separate retaining clip is omitted due to the configuration of the connector with two nozzles arranged opposite one another and the contact surfaces formed between them.
  • the connector is fixed in terms of its position by the contact surfaces between the fuel injector and the fuel line. Positional tolerances or changes in length of the fuel line due to temperature fluctuations do not lead to asymmetrical force transmission into the sealing elements due to the lack of additional fixation.
  • connection piece to be rotated about a defined pivot point. If both contact surfaces are designed in spherical geometry and the centers of the spherical geometries lie in the plane of the sealing elements, the resulting uniform loading of the sealing elements when the connector is tilted is particularly advantageous. This is particularly important for the recurring load caused by the temperature expansion of the rail, since premature wear of the sealing elements is prevented.
  • Material costs also save further processing steps, e.g. tapping in the cylinder head for screwing the clamping claw.
  • the two sockets of which have an identical geometry, particularly simple assembly is possible.
  • the connector can be installed as required. As a result, there is no need to orient the component as an additional step before inserting it.
  • Fig. 1 shows a schematic partial section through an embodiment of a connector according to the invention.
  • FIG. 1 is a schematic representation of a connector 1 according to the invention for connecting a fuel injector, not shown, with a Not shown fuel line shown.
  • the connector 1 according to the invention consists essentially of three sections. A first connecting piece 2, a radially widened area 4 and a second connecting piece 3 are arranged successively in the axial direction.
  • the first connecting piece 2 has a reduction in its radial extent in the direction of the end of the connecting piece 1 and thus forms a first shoulder 11.
  • a first support disk 9 is arranged on the first shoulder 11, the inner radial extent of which is smaller than the radial extent of the first connector 2 on the side of the enlarged region 4.
  • the outer radial extent of the first support washer 9, however, is greater than the maximum radial extent of the first connector 2.
  • the outer end of the first connector 2 is designed as a first collar 13, the outer radial extension of which preferably corresponds to the outer radial extension of the first support disk 9.
  • the radial extent of the first collar 13 and the first support disk 9 are so much smaller than the inner radial extent of the receiving opening of the adjacent component (e.g. the receptacle connecting piece of the fuel line) that the connecting piece 1 is at a certain angle with respect to that receiving component can be inclined without the first support plate 9 or the first collar 13 abutting the inner wall of the adjacent component.
  • the first collar 13 and the first support disk 9 are spaced apart in the axial direction.
  • a first sealing element 7 is arranged in the resulting space.
  • an O-ring can be used as the first sealing element 7.
  • the height and radial extent of the space formed between the first support disk 9 and the first collar 13 are dimensioned in accordance with the nominal size of the O-ring to be used.
  • the opposite end of the connector 1 corresponds in structure to the above description.
  • a second sealing element 8 is arranged between a second collar 14, which is arranged at the end of the connecting piece 1, and a second support disk 10, which rests on a second shoulder 12.
  • the radially outer dimensions are in turn dimensioned such that the second connection piece 3 in the receiving opening of the adjacent component (e.g.
  • first and second connecting piece 2 and 3 are preferably identical, so that there is a symmetrical connecting piece 1, the orientation of which does not have to be determined during installation.
  • the connecting piece 1 can be made, for example, in several parts.
  • the first and second collars 13 and 14 together with the part of the first and second connecting piece 2 and 3, which is reduced in radial expansion, can be designed as individual components and, after the support disks 9 and 10 have been placed on them, can be pressed into the central part of the connecting piece 1 ,
  • the support disks 9, 10 are slotted, for example, and the outer diameter is larger than the opening of the adjacent component. Due to the slotted design, the support disks 9, 10 always lie against the outer diameter of the bore of the adjacent component. When the support disks 9, 10 are correctly designed, there is always a gap on the inside diameter for connecting piece 2, 3 of the connecting piece 1.
  • a first contact surface 5 is formed, the geometry of which corresponds to a section of a spherical surface.
  • the center of this spherical geometry with a first radius Rl is z. B. identical to the intersection of the central axis 18 of the connector 1 and the central plane 19 of the second Sealing element 8.
  • the transition of the second nozzle 3 to the expanded area 4 is also formed as a section of a spherical surface, the center of which, for. B. is identical to the intersection of the central axis 18 of the connector 1 with the central plane 20 of the first sealing element 7 and the spherical surface has a second radius R2.
  • the two contact surfaces 5 and 6 are each supported on a corresponding surface. the fuel line and the fuel injector. As a result, a force can be exerted on the fuel injector from the fuel line in the axial direction.
  • the fuel injector is thus fixed by the connector 1 in the cylinder head.
  • the forces required to hold the fuel injector firmly in the cylinder head are absorbed on the side opposite the fuel injector by the fuel line, which is fastened to the internal combustion engine.
  • the connecting piece 1 can be inclined between the fuel line and the fuel injector.
  • the connecting piece 1 rotates around the two centers of the spherical contact surfaces 5 and 6.
  • the spherical geometry of the two contact surfaces 5 and 6 ensures that the contact surface remains uniform.
  • the radii of the two contact surfaces 5 and 6 are selected in accordance with the corresponding surfaces on the fuel line and the fuel injection valve.
  • a first and a second end face 15 and 16 are formed at the two ends of the connecting piece 1.
  • the two end faces 15 and 16 can be selected to be of different sizes. If the two differently sized end faces 15 and 16 are acted upon by the fuel pressure, a resulting force is created on the connecting piece 1 in the direction of the smaller end face 15 or 16. This resulting force can be used to increase the force with which the fuel injector is held in the cylinder head.
  • the connector 1 has an inner through hole 17 to ensure the flow of fuel from the fuel rail to the fuel injector.

Landscapes

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

Abstract

L'invention concerne un raccord servant à raccorder une conduite de carburant à une soupape d'injection de carburant et comprenant une première tubulure (2) qui peut être introduite dans un orifice de réception de la conduite de carburant, ainsi qu'un premier élément d'étanchéité (7) placé sur la première tubulure (2). Le raccord (1) comprend également, à l'extrémité opposée à la première tubulure (2), une deuxième tubulure (3) qui peut être introduite dans un évidement de la soupape d'injection de carburant et sur laquelle est placé un deuxième élément d'étanchéité (8). Entre la première et la deuxième tubulure (2, 3) est formée une zone élargie radialement (4) dont la jonction à au moins une des deux tubulures (2, 3) est réalisée en tant que première surface d'appui (5, 6) qui, lorsque le raccord (1) est monté, prend appui sur une surface correspondante sur l'un des éléments adjacents.
EP02724121A 2001-03-27 2002-03-27 Raccord pour raccorder une conduite de carburant a une soupape d'injection de carburant Expired - Lifetime EP1373707B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10115048 2001-03-27
DE10115048A DE10115048A1 (de) 2001-03-27 2001-03-27 Verbindungsstück zum Verbinden einer Brennstoffleitung mit einem Brennstoffeinspritzventil
PCT/DE2002/001130 WO2002077439A1 (fr) 2001-03-27 2002-03-27 Raccord pour raccorder une conduite de carburant a une soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1373707A1 true EP1373707A1 (fr) 2004-01-02
EP1373707B1 EP1373707B1 (fr) 2005-02-23

Family

ID=7679233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02724121A Expired - Lifetime EP1373707B1 (fr) 2001-03-27 2002-03-27 Raccord pour raccorder une conduite de carburant a une soupape d'injection de carburant

Country Status (8)

Country Link
US (1) US7083203B2 (fr)
EP (1) EP1373707B1 (fr)
JP (1) JP4227412B2 (fr)
KR (1) KR100858643B1 (fr)
CN (1) CN1304751C (fr)
CZ (1) CZ20023871A3 (fr)
DE (2) DE10115048A1 (fr)
WO (1) WO2002077439A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP4401316B2 (ja) * 2005-03-29 2010-01-20 本田技研工業株式会社 内燃機関における圧縮空気供給構造
US7419189B2 (en) * 2006-04-26 2008-09-02 International Engine Intellectual Property Company, Llc Hydraulic fitting
US20090013968A1 (en) * 2007-07-09 2009-01-15 Keegan Kevin R Vapor recovery system for a direct injector fuel rail assembly
KR101449760B1 (ko) * 2008-09-08 2014-10-13 타이코에이엠피(유) 인젝터의 더블 락킹 커넥터
EP2700805B1 (fr) * 2012-08-23 2016-06-29 Continental Automotive GmbH Pièce d'extension, soupape d'injection et ensemble de distribution de carburant
CN109098904A (zh) * 2018-10-10 2018-12-28 浙江春风动力股份有限公司 摩托车发动机及燃油分配装置
USD956937S1 (en) 2019-10-14 2022-07-05 Fernco, Inc. Pipe coupling assembly
US11193611B2 (en) 2019-10-14 2021-12-07 Fernco, Inc. Pipe coupling apparatus
DE102021210668A1 (de) * 2021-09-24 2023-03-30 Robert Bosch Gesellschaft mit beschränkter Haftung Kühlmittelverbindungsstutzen, Gehäusesystem und dessen Herstellung

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Publication number Priority date Publication date Assignee Title
US1057939A (en) * 1912-01-31 1913-04-01 Andrew H Cooper Ball-and-socket pipe-coupling.
US2428143A (en) * 1945-01-22 1947-09-30 Parker Appliance Co Flexible coupling for tubes
US3112939A (en) * 1960-03-21 1963-12-03 Gen Motors Corp Threadless tubing connector
US3376053A (en) * 1964-08-13 1968-04-02 Rosan Eng Corp Rotatable high pressure fluid fitting
US3427051A (en) * 1967-02-24 1969-02-11 Gen Dynamics Corp Fluid pressure coupling
US3565465A (en) * 1968-03-19 1971-02-23 Ellay Enfield Tubes Ltd Pipe couplings
US3515414A (en) * 1968-12-16 1970-06-02 Interspace Corp Flexible sectional pipe lines
US3874706A (en) * 1971-10-15 1975-04-01 Hydrotech Int Inc Fluid actuated pipe connection
SE508279C2 (sv) * 1996-11-21 1998-09-21 Dresser Wayne Ab Sätt och arrangemang för åstadkommande av en rörkoppling av en rörkoppling där ena delen har en rörände med två ringvulster
DE19735665A1 (de) 1997-06-25 1999-01-07 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE19758817B4 (de) 1997-12-17 2010-08-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Halterung für ein Brennstoffeinspritzventil am Zylinderkopf einer Brennkraftmaschine
US6000470A (en) * 1998-03-09 1999-12-14 Halliburton Energy Services, Inc. Self-locking connector
AU7575000A (en) 1999-09-10 2001-04-10 International Engine Intellectual Property Company, Llc Actuating fluid delivery system for a fuel injector
DE60003784T2 (de) * 2000-04-26 2004-06-03 Ford Global Technologies, Inc., A subsidiary of Ford Motor Co., Dearborn Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE10108203A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Montagebügel und Verfahren zur Montage eines Brennstoffeinspritzventils

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Title
See references of WO02077439A1 *

Also Published As

Publication number Publication date
DE50202315D1 (de) 2005-03-31
KR20030004432A (ko) 2003-01-14
US20040021009A1 (en) 2004-02-05
US7083203B2 (en) 2006-08-01
CN1460150A (zh) 2003-12-03
JP2004518887A (ja) 2004-06-24
JP4227412B2 (ja) 2009-02-18
KR100858643B1 (ko) 2008-09-17
DE10115048A1 (de) 2002-10-02
CZ20023871A3 (cs) 2004-07-14
CN1304751C (zh) 2007-03-14
WO2002077439A1 (fr) 2002-10-03
EP1373707B1 (fr) 2005-02-23

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