EP1114252B1 - Accumulateur de combustible haute pression à raccord précontraint soudé pour un systèmes d'injection de combustible des moteures à combustion interne - Google Patents

Accumulateur de combustible haute pression à raccord précontraint soudé pour un systèmes d'injection de combustible des moteures à combustion interne Download PDF

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Publication number
EP1114252B1
EP1114252B1 EP00943620A EP00943620A EP1114252B1 EP 1114252 B1 EP1114252 B1 EP 1114252B1 EP 00943620 A EP00943620 A EP 00943620A EP 00943620 A EP00943620 A EP 00943620A EP 1114252 B1 EP1114252 B1 EP 1114252B1
Authority
EP
European Patent Office
Prior art keywords
housing
pressure fuel
bore
connection piece
connecting piece
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
EP00943620A
Other languages
German (de)
English (en)
Other versions
EP1114252A1 (fr
Inventor
Kurt Frank
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 EP1114252A1 publication Critical patent/EP1114252A1/fr
Application granted granted Critical
Publication of EP1114252B1 publication Critical patent/EP1114252B1/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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • F02M55/025—Common 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
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet

Definitions

  • the invention relates to a high-pressure fuel accumulator with welded connection piece according to the preamble of claim 1 for a fuel injection system for internal combustion engines.
  • the various components of a fuel injection system such as high-pressure fuel pump, high-pressure fuel storage and injectors are usually connected by hydraulic lines.
  • the sealing of these compounds is often carried out with the help of a pushed over the hydraulic line clamping nut, which is bolted to a liquid-tightly connected to the housing of the corresponding assembly connecting piece.
  • the high-pressure fuel accumulator has a plurality of such connecting pieces, which allow, for example, the fuel supply and the fuel drain into and out of the memory.
  • weld has two functions. First, it must establish the connection between the housing and the connecting piece and transfer all forces. Especially in modern fuel injection systems resulting from the high swelling pressures high swelling tensile stresses in the weld. Secondly, the weld must fulfill a sealing function, which entails additional requirements for the weld.
  • FR 2 762 050 A discloses a fuel distributor to which a connecting piece is fastened by means of friction welding. The resulting weld is in direct contact with the high-pressure fuel and ensures both the connection of the connecting piece and the fuel distributor and for the sealing of this connection.
  • the present invention has for its object to provide a high-pressure fuel accumulator with a housing and a connecting piece connected to this, which securely seal the high-pressure region of the housing and the connecting piece against the environment and in which the high-pressure region reliably against particles that may arise when connecting both components , is protected.
  • connection of the housing and the connecting piece takes the clamping element with its cylindrical sealing surface in conjunction with a correspondingly shaped housing the sealing of the located in the through hole fuel from the environment. Due to the spatial separation of the functions "holding” and “sealing" of the connecting piece, both the sealing surface and the connection of connecting piece and housing can be optimally designed.
  • the sealing surface prevents that when connecting connecting piece and housing accumulating weld splashes or shavings can get into the high-pressure area of the connecting piece or housing.
  • An embodiment of the invention provides that at a first end of the connecting piece concentric to the through hole, a cylindrical clamping element is arranged, wherein the clamping element has a through hole, that the bore has at its end facing the connection nozzle a recess which forms an interference fit with the clamping element ,
  • the interference fit seals the through-bore of the connecting piece and the bore of the housing against the environment and thus forms the sealing surface. Due to the surface pressure between the clamping element and the recess of the housing a good sealing effect is achieved.
  • a countersink is arranged, that the bore of the housing at its end facing the connection nozzle has a recess, and that between the connecting piece and the housing, a cylindrical clamping element is present forms with the reduction of the connection piece and the recess of the housing interference fits, so that connecting piece, clamping element and housing can be made of different, optimally adapted to the respective requirements materials and thus the reliability is improved.
  • the clamping element has the shape of an outer cylinder, so that the operating pressure of the fuel expands the sealing surface of the clamping element to the outside. As a result, the surface pressure between the sealing surface of the connecting piece and the recess of the housing is increased, which additionally increases the tightness of the connection.
  • At least one groove for receiving a sealing ring is present in the clamping element, so that the tightness is further increased by the sealing ring.
  • grooves for receiving at least one respective sealing ring are present in the recess of the housing and the reduction of the connecting piece, so that the clamping element can be particularly small dimensions, since the sealing rings takes over part of the function "densities" and not the clamping element Grooves for receiving a sealing ring is weakened.
  • a first embodiment of a connecting piece 1 is shown. Of the Connecting piece 1 is connected to a high-pressure fuel storage 2 by a circumferential weld 3.
  • the high-pressure fuel accumulator 2 has a bore 4, which is connected to a through hole 5 of the connecting piece 1 and the interior 6 of the high-pressure fuel accumulator 2.
  • this collar 7 acts as a stop in the direction of the longitudinal axis of the connecting piece 1 when it rests on a corresponding annular surface 8 of the high-pressure fuel accumulator 2.
  • a clamping element 10 of the connecting piece 1 projects into it.
  • the clamping element 10 forms with the recess 9 of the high-pressure fuel accumulator 2 an interference fit and thus seals the connection of high-pressure fuel storage 2 and pipe 1 against the environment.
  • the sealing surface is thus formed by the interference fit between the connecting piece 1 and high-pressure fuel storage 2.
  • a line is usually fastened by means of a union nut, also not shown.
  • FIG. 2 a second embodiment of a connecting piece 1 according to the invention is shown.
  • the reference numbers used correspond to those in FIG. 1.
  • the connecting piece 1 has a cylindrical countersink 13 into which the clamping element 10 designed as a separate component projects.
  • the Spannelenent 10 forms with the recess 9 of the high-pressure fuel storage 2 and the reduction 13 interference fits.
  • the diameters of the countersink 13 and the recess 9 do not have to be the same, as shown here.
  • the operating pressure of the fuel, not shown here, in the bore 4 and the through-bore 5 increases the tightness of the connection of the high-pressure fuel accumulator 2 and the connecting piece 1.
  • FIG. 1 On the right side of Fig. 3, an embodiment shown in FIG. 1 is shown with the difference that the clamping element 10 has a groove 14 in which a sealing ring 15 is located.
  • FIG. 3 On the left side of Fig. 3, an embodiment with a separate clamping element 10 according to FIG. 2 is shown, in which the clamping element 10 has two grooves 14 and two sealing rings 15.

Landscapes

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

Claims (6)

  1. Accumulateur de carburant haute pression pour un système d'injection de carburant pour moteurs à combustion interne, comprenant un raccord présentant un alésage traversant (5) et relié de manière étanche aux liquides à un boîtier (2), l'intérieur du boîtier (6) et l'alésage traversant (5) étant reliés hydrauliquement par un perçage (4) dans le boîtier (2), et le raccord (1) étant relié au boîtier (2) par soudage (3),
    caractérisé en ce qu'
    un cordon de soudure (3) et des moyens d'étanchéité (10, 9, 13) de la liaison entre le boîtier (2) et le raccord (1) sont disposés séparément dans l'espace.
  2. Accumulateur de carburant haute pression selon la revendication 1,
    caractérisé en ce que
    les moyens d'étanchéité de la liaison entre le boîtier (2) et le raccord (1) sont formés d'un élément de serrage cylindrique (10),
    l'élément de serrage cylindrique (10) est disposé au niveau d'une première extrémité du raccord (1) concentriquement à l'alésage traversant (5),l'élément de serrage (10) présente un autre alésage traversant, et
    le perçage (4) présente, au niveau de son extrémité tournée vers le raccord (1), un renfoncement (9) qui forme avec l'élément de serrage (10) un ajustage serré.
  3. Accumulateur de carburant haute pression selon la revendication 1,
    caractérisé en ce que
    les moyens d'étanchéité de la liaison entre le boîtier (2) et le raccord (1) sont formés d'un élément de serrage cylindrique (10), disposé entre le raccord (1) et le boîtier (2),
    une fraisure (13) est disposée au niveau d'une première extrémité du raccord (1), concentriquement à l'alésage traversant (5),
    l'élément de serrage (10) présente un autre alésage traversant,
    le perçage (4) du boîtier (2) présente, au niveau de son extrémité tournée vers le raccord (1), un renfoncement (9), et
    l'élément de serrage (10) forme avec la fraisure (13) du raccord (1) et le renfoncement (9) du boîtier (2) des ajustages serrés.
  4. Accumulateur de carburant haute pression selon l'une des revendications 2 ou 3,
    caractérisé en ce que
    l'élément de serrage (10) possède la forme d'un cylindre extérieur.
  5. Accumulateur de carburant haute pression selon l'une des revendications 2 à 4,
    caractérisé en ce que
    dans l'élément de serrage (10) se trouve au moins une rainure (14) pour accueillir une bague d'étanchéité (15).
  6. Accumulateur de carburant haute pression selon l'une des revendications 3 à 5,
    caractérisé en ce que
    dans le renfoncement (9) du boîtier (2) et dans la fraisure (13) du raccord (1) se trouvent des rainures (14) pour accueillir au moins une bague d'étanchéité (15).
EP00943620A 1999-07-15 2000-05-19 Accumulateur de combustible haute pression à raccord précontraint soudé pour un systèmes d'injection de combustible des moteures à combustion interne Expired - Lifetime EP1114252B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19933254A DE19933254A1 (de) 1999-07-15 1999-07-15 Anschlussstutzen und Gehäuse, insbesondere Kraftstoffhochdruckspeicher, mit vorgespannt angeschweißtem Anschlussstutzen für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE19933254 1999-07-15
PCT/DE2000/001620 WO2001006116A1 (fr) 1999-07-15 2000-05-19 Raccord et carter pour un systeme d'injection de carburant pourvu d'un accumulateur de carburant haute pression

Publications (2)

Publication Number Publication Date
EP1114252A1 EP1114252A1 (fr) 2001-07-11
EP1114252B1 true EP1114252B1 (fr) 2007-04-18

Family

ID=7914932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00943620A Expired - Lifetime EP1114252B1 (fr) 1999-07-15 2000-05-19 Accumulateur de combustible haute pression à raccord précontraint soudé pour un systèmes d'injection de combustible des moteures à combustion interne

Country Status (7)

Country Link
US (1) US6513498B1 (fr)
EP (1) EP1114252B1 (fr)
JP (1) JP2003504561A (fr)
KR (1) KR100691206B1 (fr)
CN (1) CN1183323C (fr)
DE (2) DE19933254A1 (fr)
WO (1) WO2001006116A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10140057B4 (de) * 2001-08-16 2007-08-30 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
EP1298313A3 (fr) * 2001-10-01 2004-12-01 Siemens Aktiengesellschaft Accumulateur de carburant pour un dispositif d'injection de carburant
DE10162203A1 (de) * 2001-12-18 2003-07-10 Bosch Gmbh Robert Festigkeitsoptimierter Hochdruckanschluss an Hochdrucksammelräumen
JP4007590B2 (ja) * 2002-12-11 2007-11-14 臼井国際産業株式会社 接続頭部を有する高圧燃料噴射管
DE10333721B4 (de) * 2003-07-23 2005-07-07 Benteler Automobiltechnik Gmbh Kraftstoffverteilerleiste mit einem Anschlussstück
DE102004055266A1 (de) * 2004-11-17 2006-05-18 Robert Bosch Gmbh Kraftstoffeinspritzanlage mit mehreren Druckspeichern
JP4372064B2 (ja) * 2005-08-04 2009-11-25 新日本製鐵株式会社 自動車用高圧燃料噴射蓄圧分配器およびその製造方法
WO2007015566A1 (fr) * 2005-08-04 2007-02-08 Nippon Steel Corporation Distributeur d’allumage accumulateur à injection à haute pression pour automobile et son procédé de fabrication
DE102007018471A1 (de) * 2007-04-19 2008-10-23 Robert Bosch Gmbh Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal
DE102008013575B3 (de) * 2008-03-11 2009-08-13 Poppe & Potthoff Gmbh Kraftstoffverteilerbaugruppe
DE102012005921A1 (de) * 2012-03-26 2013-09-26 Poppe & Potthoff Gmbh & Co Verschweißte Baugruppe
DE202013103710U1 (de) * 2013-08-15 2013-08-29 Ti Automotive (Heidelberg) Gmbh Kraftstoffverteilerleiste
JP6406904B2 (ja) * 2014-07-16 2018-10-17 臼井国際産業株式会社 ガソリン直噴エンジン用燃料レールの端末シール構造
US20170350321A1 (en) * 2016-06-02 2017-12-07 General Electric Company Bundled Tube Fuel Nozzle Assembly with Tube Extensions
JP2019138240A (ja) * 2018-02-13 2019-08-22 トヨタ自動車株式会社 燃料配管

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2015246A (en) * 1933-12-26 1935-09-24 Taylor Edward Hall Welding outlet

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DE1937444C3 (de) * 1969-07-23 1974-03-21 Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Durch Steckverbindungen herstellbare Kraftstoffleitungsanschlüsse an einer für jeden Zylinder einer Brennkraftmaschine vorgesehenen Pumpendüseneinheit
IT1219300B (it) 1988-05-13 1990-05-03 Weber Srl Procedimento per la costruzione di un collettore per il carburante per un impianto di alimentazione del carburante di un motore a combustione interna
JPH0754616Y2 (ja) * 1989-05-06 1995-12-18 臼井国際産業株式会社 フユーエルデリバリパイプ
US5172939A (en) * 1989-10-14 1992-12-22 Usui Kokusai Sangyo Kaisha Ltd. Connection structure for branch pipe in high-pressure fuel rail
DE9302824U1 (de) * 1993-02-26 1993-04-15 Technoflow Tube-Systems GmbH, 3501 Fuldabrück Einrichtung für die Kraftstoffversorgung eines Kraftfahrzeugmotors
DE4404861A1 (de) * 1994-02-16 1995-08-17 Alusuisse Lonza Services Ag Bauteil
US5667255A (en) * 1994-06-28 1997-09-16 Usui Kokusai Sangyo Kaisha Ltd. Joint structure for joining a branch member to a high pressure fuel rail
EP0751336B1 (fr) * 1994-12-08 2002-04-10 Usui Kokusai Sangyo Kaisha Ltd. rampe a carburant haute pression
DE19607521C1 (de) 1996-02-28 1997-04-10 Juergen Dipl Ing Guido Kraftstoff-Verteilerrohr
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FR2762050B1 (fr) * 1997-04-10 1999-06-18 Cideb Dispositif de distribution de carburant pour l'alimentation des cylindres d'un moteur a combustion interne
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Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US2015246A (en) * 1933-12-26 1935-09-24 Taylor Edward Hall Welding outlet

Also Published As

Publication number Publication date
DE50014262D1 (de) 2007-05-31
KR20010073160A (ko) 2001-07-31
CN1317071A (zh) 2001-10-10
US6513498B1 (en) 2003-02-04
KR100691206B1 (ko) 2007-03-08
DE19933254A1 (de) 2001-01-25
JP2003504561A (ja) 2003-02-04
EP1114252A1 (fr) 2001-07-11
WO2001006116A1 (fr) 2001-01-25
CN1183323C (zh) 2005-01-05

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