EP1179135B1 - Accumulateur de carburant haute pression - Google Patents

Accumulateur de carburant haute pression Download PDF

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Publication number
EP1179135B1
EP1179135B1 EP01916898A EP01916898A EP1179135B1 EP 1179135 B1 EP1179135 B1 EP 1179135B1 EP 01916898 A EP01916898 A EP 01916898A EP 01916898 A EP01916898 A EP 01916898A EP 1179135 B1 EP1179135 B1 EP 1179135B1
Authority
EP
European Patent Office
Prior art keywords
pressure
socket
pressure line
fuel accumulator
pressure fuel
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
EP01916898A
Other languages
German (de)
English (en)
Other versions
EP1179135A1 (fr
Inventor
Steffen Jung
Heinz Popp
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 EP1179135A1 publication Critical patent/EP1179135A1/fr
Application granted granted Critical
Publication of EP1179135B1 publication Critical patent/EP1179135B1/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
    • 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 to a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a tubular base body, is welded to the at least one socket for connecting a high-pressure line.
  • Such a high-pressure fuel storage is e.g. in EP 0 866 221 A1.
  • a high-pressure pump possibly with the aid of a prefeed pump, conveys the fuel to be injected from a tank into the central high-pressure fuel accumulator, which is referred to as a common rail.
  • Power rail lines lead from the rail to the individual injectors which are assigned to the cylinders of the internal combustion engine.
  • the injectors are controlled individually by the engine electronics as a function of the operating parameters of the internal combustion engine in order to inject fuel into the combustion chamber of the internal combustion engine.
  • the object of the invention is to improve the quality and safety of the high-pressure connection points in a high-pressure fuel accumulator of the type described.
  • the inventive High-pressure fuel storage be simple and inexpensive to produce.
  • the collar serves to introduce the welding current required to weld the socket.
  • the welding electrode is applied to the end remote from the base of the socket. This spatter can get into the interior of the socket and damage a thread provided there.
  • the geometry inside the bushing may undesirably deform due to the temperatures encountered during welding.
  • a bore emanates, which opens into a receiving hopper, which widens outwardly and serves to receive an end of the high-pressure line, by a substantially hollow cylindrical Press screw is pressed high-pressure-tight against the receiving hopper, and that the sealing point is surrounded by a substantially hollow cylindrical insulating ring.
  • the insulating ring safely prevents electrical shunting when welding the socket.
  • the insulating ring ensures that no welding spatter can reach the sealing point when welding the socket.
  • Another particular embodiment of the invention is characterized in that the insulating ring is pre-assembled in the socket, and that the inner circumferential surface of the insulating ring bears against the outer circumferential surface of a projection in which the receiving hopper is formed. This ensures that the sleeve is centered during assembly prior to welding relative to the projection.
  • Another particular embodiment of the invention is characterized in that the end of the high pressure line is spherical, and that the inner diameter of the extruder screw is greater than the outer diameter of the high pressure line. This allows an exemption of the high pressure line relative to the socket. This provides the advantage that any installation tolerances in the engine compartment can be compensated.
  • Another particular embodiment of the invention is characterized in that the facing to the tubular body end face of the socket is chamfered inwards.
  • the bevel facilitates access to the joint between the bush and the tubular body.
  • the high-pressure fuel accumulator shown in cross-section in Figure 1 comprises a tubular body 1.
  • a longitudinal bore 2 for storing the highly pressurized fuel.
  • From the longitudinal bore 2 go from a plurality of transverse bores, of which in Figure 1, only one, namely the transverse bore 3 can be seen.
  • the receiving bore 4 has a conical shape and forms a sealing surface for a ball-shaped end 5 of a high-pressure line 6.
  • the spherical end 5 of the high-pressure line 6 passes into a region 7 with an enlarged outer diameter , Following the area 7 with extended outer diameter, a pressure shoulder 8 is formed on the outside of the high-pressure line 6.
  • a reduction 9 in Appendix which is formed on the inner circumference of the end facing the tubular body 1 end of a compression screw 10.
  • the prescrew 10 has substantially the shape of a hollow circular cylinder, through which the high-pressure line 6 passes.
  • the compression screw 10 is provided with an external thread 11, which cooperates with an internal thread 12 which is formed in a hollow cylindrical bushing 13.
  • a collar 14 is provided at the end facing the tubular body 1 end.
  • a chamfer 15 is formed on the side facing the tubular base body 1 end face of the bushing 13.
  • the chamfer 15 is arranged approximately perpendicular to a countersink 19, which is formed on the inner circumference of the bushing 13.
  • a circumferential edge which is rounded and rests on a flat surface 20 which is formed on the tubular base body 1.
  • the connection between the bushing 13 and the tubular base body 1 is effected by a weld 16.
  • a projection 17 rises on the tubular base body 1.
  • the projection 17 has the outside of the shape of a cylinder which is surrounded by an insulating ring 18.
  • the insulating ring has the shape of a hollow circular cylinder which is fitted in the bushing 13.

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

Claims (4)

  1. Accumulateur de carburant haute pression pour un système d'injection de carburant à rampe commune d'un moteur à combustion interne, comprenant un corps de base tubulaire (1) auquel est soudé au moins un manchon (13) pour le raccordement d'une conduite haute pression (6), dans lequel un collet (14) est formé à l'extrémité du manchon (13) tournée vers le corps de base (1), dans lequel un alésage (3) part de l'intérieur (2) du corps de base tubulaire (1) et débouche dans un cône de réception (4) qui s'évase vers l'extérieur et sert à la réception d'une extrémité (5) de la conduite haute pression (6), qui est pressée de façon étanche à la haute pression contre le cône de réception (4) par une vis de pression essentiellement en forme de cylindre creux (10),
    caractérisé en ce que
    la zone étanche entre le cône de réception (4) et une extrémité (5) de la conduite haute pression (6) est entourée par une bague d'isolation (18) essentiellement en forme de cylindre creux.
  2. Accumulateur de carburant haute pression selon la revendication 1,
    caractérisé en ce que
    la bague d'isolation (18) est prémontée dans le manchon (13), et la surface enveloppe intérieure de la bague d'isolation (18) repose contre une surface enveloppe extérieure d'une saillie (17) dans laquelle est formé le cône de réception (4).
  3. Accumulateur de carburant haute pression selon la revendication 1 ou 2,
    caractérisé en ce que
    l'extrémité (5) de la conduite haute pression (6) est sphérique, et le diamètre intérieur de la vis de pression (10) est supérieur au diamètre extérieur de la conduite haute pression (6).
  4. Accumulateur de carburant haute pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la face frontale du manchon (13) tournée vers le corps de base tubulaire (1) est chanfreinée vers l'intérieur.
EP01916898A 2000-03-06 2001-03-05 Accumulateur de carburant haute pression Expired - Lifetime EP1179135B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10010944 2000-03-06
DE2000110944 DE10010944A1 (de) 2000-03-06 2000-03-06 Kraftstoffhochdruckspeicher
PCT/DE2001/000823 WO2001066934A1 (fr) 2000-03-06 2001-03-05 Accumulateur de carburant haute pression

Publications (2)

Publication Number Publication Date
EP1179135A1 EP1179135A1 (fr) 2002-02-13
EP1179135B1 true EP1179135B1 (fr) 2006-01-04

Family

ID=7633747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01916898A Expired - Lifetime EP1179135B1 (fr) 2000-03-06 2001-03-05 Accumulateur de carburant haute pression

Country Status (5)

Country Link
EP (1) EP1179135B1 (fr)
JP (1) JP2003526048A (fr)
CN (1) CN1196856C (fr)
DE (2) DE10010944A1 (fr)
WO (1) WO2001066934A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101230820B (zh) * 2007-01-25 2012-01-25 株式会社电装 共轨

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10126617B4 (de) * 2001-05-31 2005-05-25 Siemens Ag Kraftstoffzuführvorrichtung
EP1426607A1 (fr) * 2002-12-06 2004-06-09 Wärtsilä Schweiz AG Accumulateur de pression pour un système à rampe commune
EP1426609A1 (fr) * 2002-12-06 2004-06-09 Wärtsilä Schweiz AG Accumulateur de pression pour un système à rampe commune
JP4075838B2 (ja) * 2003-06-27 2008-04-16 株式会社デンソー 配管継手装置
JP4357362B2 (ja) * 2004-05-19 2009-11-04 臼井国際産業株式会社 コモンレール用分岐接続体の継手構造
JP4069913B2 (ja) * 2004-09-10 2008-04-02 株式会社デンソー 蓄圧式燃料噴射システムに用いられる継手部材の接合方法および取付ステーの接合方法
DE102010001880A1 (de) * 2010-02-12 2011-08-18 Robert Bosch GmbH, 70469 Zylinderkopf für eine Kraftstoffhochdruckpumpe
DE102012209421A1 (de) * 2012-06-04 2013-12-05 Robert Bosch Gmbh Vorrichtung zum Zumessen von Kraftstoff
EP2963323B1 (fr) * 2014-07-02 2017-12-27 SchmitterGroup AG Usage d'un raccord de conduites tubulaires pour transporter du gaz hydrogène et raccord de conduites tubulaires avec du gaz hydrogène
CN105351131A (zh) * 2015-11-30 2016-02-24 重庆小康工业集团股份有限公司 发动机高压燃油管构造
JP6973271B2 (ja) * 2018-04-26 2021-11-24 トヨタ自動車株式会社 プロテクタ及びプロテクタ製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69526338T2 (de) * 1994-12-08 2003-01-02 Usui Kokusai Sangyo Kk Hochdruck-brennstoff-verteilung
DE19607521C1 (de) * 1996-02-28 1997-04-10 Juergen Dipl Ing Guido Kraftstoff-Verteilerrohr
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101230820B (zh) * 2007-01-25 2012-01-25 株式会社电装 共轨

Also Published As

Publication number Publication date
DE10010944A1 (de) 2001-09-20
WO2001066934A1 (fr) 2001-09-13
CN1363015A (zh) 2002-08-07
CN1196856C (zh) 2005-04-13
JP2003526048A (ja) 2003-09-02
DE50108618D1 (de) 2006-03-30
EP1179135A1 (fr) 2002-02-13

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