EP1114252A1 - Raccord et carter pour un systeme d'injection de carburant pourvu d'un accumulateur de carburant haute pression - Google Patents

Raccord et carter pour un systeme d'injection de carburant pourvu d'un accumulateur de carburant haute pression

Info

Publication number
EP1114252A1
EP1114252A1 EP00943620A EP00943620A EP1114252A1 EP 1114252 A1 EP1114252 A1 EP 1114252A1 EP 00943620 A EP00943620 A EP 00943620A EP 00943620 A EP00943620 A EP 00943620A EP 1114252 A1 EP1114252 A1 EP 1114252A1
Authority
EP
European Patent Office
Prior art keywords
housing
clamping element
connecting piece
connection
hole
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
EP00943620A
Other languages
German (de)
English (en)
Other versions
EP1114252B1 (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

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
    • 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 connecting piece according to the preamble of claim 1 and a housing, in particular a high-pressure fuel accumulator with a welded-on connecting piece according to the preamble of claim 4 for a fuel injection system for internal combustion engines.
  • Fuel injection systems such as high-pressure fuel pumps, high-pressure fuel accumulators and injection nozzles, are usually connected to one another by hydraulic lines. These connections are often sealed with the aid of a clamping nut which is pushed over the hydraulic line and which is connected in a liquid-tight manner to the housing of the corresponding assembly
  • connection piece is screwed.
  • the high-pressure fuel accumulator has a large number of such connecting pieces, which, for example, enable the fuel supply and fuel outflow into and out of the accumulator.
  • connection pieces which attach to the housing be welded on.
  • a disadvantage of the known welded structures is that the weld seam has two functions. First, it must establish the connection between the housing and the connecting piece and transfer all forces. Especially with modern ones
  • Fuel injection systems result from the high swelling pressures and high swelling tensile stresses in the weld seam.
  • a further disadvantage of the known welded constructions is that during the welding process, spatter or weld deposits can reach the high-pressure area of the line or the fuel accumulator, which can lead to malfunctions in the fuel injection system.
  • the present invention has for its object to provide a connection piece and a housing and a connection piece connected to it, which securely seal the high pressure area of the housing and the connection piece from the environment and in which the high pressure area reliably against particles that can arise when connecting the two components is protected.
  • a connecting piece for a fuel injection system for internal combustion engines with a through hole running in the direction of the longitudinal axis, with a first end at which a concentric to the through hole is arranged
  • Clamping element which has a through hole and a cylindrical sealing surface.
  • the clamping element takes over with its cylindrical sealing surface
  • connection with a suitably designed housing Sealing the fuel in the through hole from the environment. Due to the spatial separation of the functions "holding” and “sealing" of the connection piece, both the sealing surface and the connection of the connection piece and housing can be optimally designed.
  • the sealing surface prevents welding spatter or chips that occur when connecting the connection piece and housing from getting into the high-pressure area of the connection piece or housing.
  • One embodiment provides that the connecting piece and the tensioning element are made in one piece, so that the number of components is minimized.
  • the connecting piece and the tensioning element are separate components, so that both components can be optimized separately with regard to shape, material and manufacturing process.
  • the sealing surface has the shape of an outer cylinder, so that the operating pressure of the fuel expands the sealing surface outwards and thus increases the surface pressure between the sealing surface of the connecting piece and the housing.
  • Another variant provides that at least one groove for receiving a sealing ring is present in the tensioning element.
  • a housing in particular a high-pressure fuel accumulator, for a fuel injection system for internal combustion engines with a connecting piece which has a through-hole and is connected to the housing in a liquid-tight manner, the inside of the housing and the through-hole being connected by a Bore in the housing are hydraulically connected, the means for connecting the housing and connecting piece and the means for sealing the connection of the housing and connecting piece being arranged spatially separated.
  • An embodiment of the invention provides that a cylindrical clamping element is arranged concentrically to the through-hole at a first end of the connecting piece, the clamping element having a through-hole that the hole has a recess at its end facing the connecting piece, which forms an interference fit with the clamping element ,
  • Connection 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 in the housing, a good sealing effect is achieved.
  • a countersink is arranged concentrically to the through-hole at a first end of the connecting piece, that the bore of the housing has a recess at its end facing the connecting piece, and that There is a cylindrical clamping element between the connecting piece and the housing, which forms press fits with the lowering of the connecting piece and the recess of the housing:, so that the connecting piece, clamping element and housing can be made from different materials that are optimally adapted to the respective requirements and thus improve operational safety becomes.
  • Clamping element in the form of an outer cylinder, so that the operating pressure of the fuel expands the sealing surface of the clamping element to the outside.
  • the surface pressure between the sealing surface of the connecting piece and that of the recess in the housing is increased, which additionally increases the tightness of the connection.
  • At least one groove for receiving a is in the clamping element
  • Sealing rings available, so that the tightness is further increased by the sealing ring.
  • grooves are provided in the recess of the housing and the lowering of the connecting piece
  • sealing ring there is at least one sealing ring each, so that the clamping element can be dimensioned to be particularly small, since the sealing rings take on part of the "sealing" function and the clamping element is not weakened by grooves for receiving a sealing ring.
  • the connecting piece and the housing are connected by welding.
  • This housing has the advantages of the known welded structures, such as simple and inexpensive manufacture, without the disadvantages to have.
  • the pretensioning of the clamping element there is a permanent pretension between the sealing surfaces of the connection piece and the housing after the welding has taken place.
  • the spatial separation of the sealing surface and the weld seam prevents the penetration of welding spatter into the high-pressure area of the housing or connection piece.
  • the notch effect on the weld seam possibly caused by the fuel under operating pressure is eliminated.
  • FIG. 1 shows a first embodiment of a connecting piece according to the invention and a high-pressure fuel accumulator
  • connection piece according to the invention shows a second embodiment of a connection piece according to the invention and a high-pressure fuel accumulator; such as
  • Fig. 3 shows a third embodiment of a connecting piece according to the invention and a high-pressure fuel accumulator with sealing rings.
  • connection piece 1 shows a first embodiment of a connecting piece 1 according to the invention.
  • the Connection piece 1 is with a
  • High-pressure fuel reservoir 2 connected by a circumferential weld seam 3.
  • the high-pressure fuel reservoir 2 has a bore 4, which is connected to a through bore 5 of the connecting piece 1 and the interior 6 of the high-pressure fuel reservoir 2.
  • this collar 7 acts as a stop in the direction of the longitudinal axis of the connecting piece 1 when it is seated on a corresponding annular surface 8 of the high-pressure fuel accumulator 2. The position of the connecting piece 1 in the axial direction with respect to the high-pressure fuel accumulator 2 can thus be determined during welding.
  • a high-pressure fuel reservoir " 2 protrudes into the connection piece 1.
  • the tension element 10 forms an interference fit with the recess 9 of the high-pressure fuel store 2 and thus seals the connection between the high-pressure fuel store 2 and the connection port 1 from the environment.
  • the sealing surface is thus formed by the press fit between the connection port 1 and high-pressure fuel accumulator 2 formed.
  • FIG. 1 shows a line (not shown) at the end of the connecting piece 1 facing away from the high-pressure fuel accumulator 2.
  • a line (not shown) is usually fastened by means of a union nut (also not shown).
  • 2 shows a second embodiment of a connecting piece 1 according to the invention.
  • 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, which is designed as a separate component, projects.
  • the clamping element 10 forms with the depression 9 of the high-pressure fuel reservoir 2 and the countersink 13 press fits. Due to the fact that the tensioning element 10 is designed as a separate component, it can be optimized with regard to the material and the production method independently of the connecting piece 1 and the high-pressure fuel reservoir 2.
  • the diameter of the depression 13 and the recess 9 need not be the same, as shown here. In this embodiment, too
  • FIG. 3 On the right side of FIG. 3, an embodiment is shown according to FIG. 1 with the difference that the clamping element 10 has a groove 14 in which a sealing ring 15 is located.
  • FIG. 2 An embodiment with a separate clamping element 10 according to FIG. 2 is shown on the left-hand side of FIG. 3, in which the clamping element 10 has two grooves 14 and two sealing rings 15.
  • the grooves 14 can also be made in the depression 13 and the depression 9.

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)

Abstract

L'invention concerne un raccord (1) et un carter (2), notamment un accumulateur de carburant haute pression pour un système d'injection de carburant de moteurs à combustion interne, présentant un raccord soudé (1). Des surfaces d'étanchéité séparées physiquement du cordon de soudure (3) sont situées entre le carter (2) et le raccord (1).
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
DE19933254 1999-07-15
DE19933254A DE19933254A1 (de) 1999-07-15 1999-07-15 Anschlussstutzen und Gehäuse, insbesondere Kraftstoffhochdruckspeicher, mit vorgespannt angeschweißtem Anschlussstutzen für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen
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 true EP1114252A1 (fr) 2001-07-11
EP1114252B1 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
EP1914418B1 (fr) * 2005-08-04 2012-01-25 Nippon Steel Corporation Distributeur accumulateur pour injection haute pression dans une 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

Family Cites Families (13)

* 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
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 (fr) * 1993-02-26 1993-04-15 Technoflow Tube-Systems Gmbh, 3501 Fuldabrueck, De
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
JP3708124B2 (ja) * 1994-12-08 2005-10-19 臼井国際産業株式会社 高圧燃料レールにおける分岐接続体の接続構造
DE19607521C1 (de) 1996-02-28 1997-04-10 Juergen Dipl Ing Guido Kraftstoff-Verteilerrohr
DE19744762A1 (de) 1997-03-18 1998-10-01 Poppe & Potthoff Gmbh & Co Einspritzeinrichtung für einen Dieselmotor
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
DE19729392C2 (de) * 1997-07-09 1999-05-06 Siemens Ag Kraftstoffspeicher mit Abdichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0106116A1 *

Also Published As

Publication number Publication date
CN1317071A (zh) 2001-10-10
US6513498B1 (en) 2003-02-04
CN1183323C (zh) 2005-01-05
KR20010073160A (ko) 2001-07-31
KR100691206B1 (ko) 2007-03-08
JP2003504561A (ja) 2003-02-04
WO2001006116A1 (fr) 2001-01-25
DE19933254A1 (de) 2001-01-25
DE50014262D1 (de) 2007-05-31
EP1114252B1 (fr) 2007-04-18

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