EP1153216B1 - Anschlussstutzen und gehäuse für ein kraftstoffeinspritzsystem - Google Patents

Anschlussstutzen und gehäuse für ein kraftstoffeinspritzsystem Download PDF

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Publication number
EP1153216B1
EP1153216B1 EP00993331A EP00993331A EP1153216B1 EP 1153216 B1 EP1153216 B1 EP 1153216B1 EP 00993331 A EP00993331 A EP 00993331A EP 00993331 A EP00993331 A EP 00993331A EP 1153216 B1 EP1153216 B1 EP 1153216B1
Authority
EP
European Patent Office
Prior art keywords
housing
sealing
sealing element
housing according
connection 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
EP00993331A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1153216A1 (de
Inventor
Steffen Jung
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 EP1153216A1 publication Critical patent/EP1153216A1/de
Application granted granted Critical
Publication of EP1153216B1 publication Critical patent/EP1153216B1/de
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
    • 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
    • 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

Definitions

  • the invention relates a housing, in particular a high-pressure fuel storage, after the generic term of Claim 1.
  • Such housings are e.g. from the Druckschraften DE 197 29 392 A1 and US 5,775,302 A known.
  • the different assemblies of a Fuel injection system such as high-pressure fuel pump, High-pressure fuel storage and injectors, are usually by hydraulic high pressure lines connected with each other.
  • the sealing of this connection often with the help of a hydraulic Line pushed clamping nut, which with a with the Housing of the corresponding module liquid-tight screwed connection piece is screwed.
  • the high-pressure fuel storage has a plurality of such Connecting piece on, for example, the Fuel supply and the fuel drain in and out of the Enable high-pressure fuel storage.
  • weld is two Has functions. First, it provides a liquid-tight Connection between the housing and the connecting piece and second, it transfers the between spigot and Housing acting forces. Especially in modern day Fuel injection systems result from the high swelling operating pressures high swelling tensile stresses in the weld.
  • the present invention is based on the object a case and a with to provide this connected connecting piece, which the high pressure area of the housing and the Sealing piece securely seals against the environment and in which the high pressure area reliably against Particles that form when connecting both components can, is protected.
  • An embodiment of the invention provides that the first Sealing surface is designed as a biting edge, so that the Surface pressure and thus the tightness of the connection a lot is high. There is also a sealing edge and the associated level counter surface inexpensive to produce.
  • the connecting piece in another variant of the connecting piece is provided that the first sealing surface frustoconical, or double frustoconical, so that the first Sealing surface robust against mechanical damage is and is easy to produce.
  • the first Sealing surface the shape of a circle, respectively, have the first Sealing surfaces the shape of a circular ring surface, so that the Production and subsequent measurement of the Connection socket are simplified.
  • At least one second Sealing surface is present, and that the second sealing surface cooperates with a sealing surface of a high-pressure line, so that also the transition between connecting pieces and High pressure line is securely sealed.
  • the Sealing element on a plurality of connecting holes, the at least in the region of a second end of the sealing element hydraulically connected, so that from the Housing flowing fuel in a high-pressure line can be dissipated and vice versa.
  • the Connecting hole (9) or the connecting holes (9) at least one of its ends on a recesses to the To reduce flow resistance.
  • connection piece at its second end means for connecting the High pressure line and the connection piece, in particular an external thread or an internal thread, having, so that the connection is solvable.
  • the sealing element with bolted to the spigot, leaving a functional Separation of the connection of the connecting piece with the Housing on the one hand and the high pressure line on the other given is.
  • a Housing in particular a high-pressure fuel storage for a fuel injection system for internal combustion engines, with one, having a through hole, with the housing connected connecting piece, wherein in the Through hole a sealing element according to one of preceding claims is arranged, which the Leakage of fuel into the environment prevented.
  • the area bounded by the first sealing surface is thereby smaller than, for example, that of the weld another connection of housing and connecting piece enclosed area. This leads to that from the Operating pressure of the fuel injection system resulting and on the connection of connecting piece and housing acting pressure forces are reduced. This is in advantageous in two respects. Because the area is square depends on the diameter, the compressive forces are reduced disproportionately. In addition, the amplitude of the swelling strain of the compound of Connection piece and housing from, so the fatigue strength the connection is additionally increased. Furthermore, the High-pressure fuel storage to various Operating conditions while optimizing the Manufacturing costs are adjusted by number and Diameter of the holes are changed. Finally is it by separating the functions "hold” and "densities" almost impossible, the sealing surface when connecting Damage to connecting piece and housing.
  • An embodiment of the invention provides that the sealing element at a first end a first Has sealing surface, with a correspondingly shaped Counter surface of the housing (2) cooperates, and that the first sealing surface the outlet openings of the holes in the base encloses or that the outlet openings the holes within the from the first sealing surfaces lie. This causes that from the operating pressure Fuel injection system resulting and on Connection of connecting pieces and housing pressure forces be reduced because of the effective hydraulic power is reduced.
  • the counter surface of the housing a Recess with a flat base, so that the Recess can be kept flat and the notch effect is low.
  • Another variant provides that the opposite surface of the Housing a conical recess or a frusto-conical recess, so that a Self-reinforcement of the surface pressure between the first Sealing surface and counter surface occurs.
  • the counter surface the housing has a substantially trapezoidal annular groove, so that the operating pressure only a further reduced area acted in the form of a ring surface and thus the resulting from the operating pressure and on the connection Force acting on the connecting piece and the housing continues reduced.
  • This housing has the advantages of the known Welded constructions, such as simple and cost-effective production, on, without their disadvantages too to have.
  • Fig. 1 is a first embodiment of a inventive connecting piece 1 shown.
  • the Connecting piece 1 is connected to the wall of a housing. 2 welded.
  • the weld 3 is circumferential and can through be made a variety of welding processes.
  • the Connecting piece 1 has the task of a hydraulic Connection between the interior 4 of the housing 2 and a To produce high pressure line 5.
  • the Housing 2 a plurality of holes 6.
  • An advantage of this Design is that - same hydraulic Diameter provided - by a plurality Smaller holes caused voltage peaks in the housing 2 smaller than a single hole 6 large Diameter are. This increases pressure resistance and Lifetime of high-pressure fuel storage.
  • the high-pressure fuel storage to various Operating conditions while optimizing the Manufacturing costs are adjusted by number and Diameter of the connection holes are changed.
  • a sealing element 8 is arranged, which is a connecting bore 9 has.
  • the sealing element 8 has at its first end 10 a biting edge 11, which together with the base 12 of a recess 13 of the housing 2 prevent the in the holes 6 and the connecting hole 9 under high Pressurized fuel, not shown in the Environment.
  • connection pieces 1 and High-pressure line 5 By screwing connection pieces 1 and High-pressure line 5 by means of a clamping nut 14 both the biting edge 11 with the base 12 as well the high pressure line 5 with a second sealing surface 15 at a second end of the sealing element 8 clamped and sealed.
  • the seal of Sealing element 8 and base 12 and of sealing element. 8 and high pressure line 5 also be done in other ways.
  • the compressive forces of the fuel are proportional to that of the B Schokante 11 enclosed area. Because this area smaller than that enclosed by the weld 3 Area, results in a significant reduction in the the pressure forces of the fuel caused tensile stresses welded in the weld 3 opposite Connecting piece according to the prior art. In the latter the fuel fills the entire of the weld 3 enclosed area, or the entire associated cavity out. In addition, the pressure forces cause welded connection piece according to the prior art Notch effects in the weld 3. These are omitted in the Use of a connecting piece 1 according to the invention Sealing element 8.
  • Figs. 2a and 2b a second embodiment of the inventive connecting piece 1 shown.
  • the used reference numerals correspond to those in Fig. 1. Regarding the similarities between these Embodiments be on the above statements directed.
  • connection bore has one end Recess on.
  • FIG. 2 b shows a section through that of the biting edge 11 and the base 12 formed plane. In this Representation can be seen that the outlet openings 18 the holes 6 within the of the biting edge 11th enclosed area lie.
  • Figs. 3a and 3b is a third embodiment of inventive connecting piece 1 shown.
  • the used reference numerals correspond to those in Fig. 1. Regarding the similarities between these Embodiments be on the above statements directed.
  • Fig. 3b shows a plan view of a recess 13 according to Fig. 3a.
  • Fig. 3b shows a plan view of a recess 13 according to Fig. 3a.
  • FIGS. 4a and 4b show a fourth embodiment of the invention inventive connecting piece 1.
  • the used Reference numerals correspond to those in Fig. 1. Regarding the Similarities between these embodiments is on referenced above.
  • the first end 10 of the sealing element 8 has two concentrically arranged Bschreibkanten 11, which with the Base 12 of the recess 13 the exit of Prevent fuel into the environment.
  • Fig. 4b shows a plan view of the biting edges 11 and the base 12 of the recess 13 formed Surface according to Fig. 4a.
  • Fig. 4b shows a plan view of the biting edges 11 and the base 12 of the recess 13 formed Surface according to Fig. 4a.
  • inventive connecting piece 1 correspond to the used reference numerals correspond to those in Fig. 1. Regarding the similarities between these Embodiments be on the above statements directed.
  • the first end 10 of the sealing element 8 is frustoconical trained and acts with a correspondingly designed Recess 13 so together that the seal of the Holes 6 and the connection hole 9 against the environment he follows.
  • the sealing element 8 is provided with an internal thread 17 screwed the connection piece 1. Despite the simple Structure of this embodiment will be a clear Reduction of tensile stresses in the weld 3 achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP00993331A 1999-12-08 2000-12-06 Anschlussstutzen und gehäuse für ein kraftstoffeinspritzsystem Expired - Lifetime EP1153216B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1999159105 DE19959105A1 (de) 1999-12-08 1999-12-08 Anschlussstutzen und Gehäuse, insbesondere Kraftstoffhochdruckspeicher, mit vorgespannt angeschweißtem Anschlussstutzen für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE19959105 1999-12-08
PCT/DE2000/004340 WO2001042643A1 (de) 1999-12-08 2000-12-06 Anschlussstutzen und gehäuse für ein kraftstoffeinspritzsystem

Publications (2)

Publication Number Publication Date
EP1153216A1 EP1153216A1 (de) 2001-11-14
EP1153216B1 true EP1153216B1 (de) 2005-10-26

Family

ID=7931819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00993331A Expired - Lifetime EP1153216B1 (de) 1999-12-08 2000-12-06 Anschlussstutzen und gehäuse für ein kraftstoffeinspritzsystem

Country Status (6)

Country Link
EP (1) EP1153216B1 (pl)
JP (1) JP2003516497A (pl)
CZ (1) CZ297012B6 (pl)
DE (2) DE19959105A1 (pl)
PL (1) PL200643B1 (pl)
WO (1) WO2001042643A1 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10307871A1 (de) * 2003-02-25 2004-09-02 Robert Bosch Gmbh Hochdruckleitung für eine Kraftstoffeinspritzanlage
US20090144959A1 (en) * 2007-12-11 2009-06-11 Colletti Michael J Method for assembly of a direct injection fuel rail
US7699041B2 (en) * 2007-12-11 2010-04-20 Delphi Technologies, Inc. Fuel distribution tube for direct injection fuel rail assemblies

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001009506A1 (de) * 1999-08-03 2001-02-08 Robert Bosch Gmbh Kraftstoffhochdruckspeicher

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197386B (en) * 1986-11-07 1990-08-29 Lucas Ind Plc Fuel injection nozzle
JP2898384B2 (ja) * 1989-09-27 1999-05-31 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
JP2803383B2 (ja) * 1991-04-08 1998-09-24 トヨタ自動車株式会社 高圧流体用継手
JPH077052A (ja) * 1993-06-16 1995-01-10 Seiko Epson Corp 電気特性測定用プローブ
DE19531743C1 (de) * 1995-08-29 1996-12-05 Guido Jurgen Abdrückvorrichtung
DE19606946C2 (de) * 1996-02-23 1998-02-19 Mtu Friedrichshafen Gmbh Anschlußverbindung einer Kraftstoffhochdruckleitung an eine ortsfeste Anschlußstelle
DE19607521C1 (de) * 1996-02-28 1997-04-10 Juergen Dipl Ing Guido Kraftstoff-Verteilerrohr
DE19614982C1 (de) * 1996-04-16 1997-10-16 Hatz Motoren Hochdruckleitungsanschluß
JPH09303232A (ja) * 1996-05-09 1997-11-25 Toyota Motor Corp コモンレール式ディーゼルエンジンの噴射管接続構造
JP3841370B2 (ja) * 1996-12-07 2006-11-01 臼井国際産業株式会社 コモンレール
DE19744762A1 (de) * 1997-03-18 1998-10-01 Poppe & Potthoff Gmbh & Co Einspritzeinrichtung für einen Dieselmotor
JP3798113B2 (ja) * 1997-04-15 2006-07-19 臼井国際産業株式会社 コモンレール
DE19729392C2 (de) * 1997-07-09 1999-05-06 Siemens Ag Kraftstoffspeicher mit Abdichtung
US6318766B1 (en) * 1997-09-15 2001-11-20 Swagelok Company Face seal gland with raised peripheral ring having circumferentially spaced recesses
DE19753518A1 (de) * 1997-12-03 1999-06-10 Bosch Gmbh Robert Kraftstoffzuleitungseinrichtung
JP4389186B2 (ja) * 1998-02-23 2009-12-24 忠弘 大見 ガスケットおよび管継手

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001009506A1 (de) * 1999-08-03 2001-02-08 Robert Bosch Gmbh Kraftstoffhochdruckspeicher

Also Published As

Publication number Publication date
JP2003516497A (ja) 2003-05-13
CZ20012840A3 (cs) 2002-11-13
PL200643B1 (pl) 2009-01-30
EP1153216A1 (de) 2001-11-14
DE50011447D1 (de) 2005-12-01
PL349400A1 (en) 2002-07-15
DE19959105A1 (de) 2001-06-21
WO2001042643A1 (de) 2001-06-14
CZ297012B6 (cs) 2006-08-16

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