EP1137879B1 - Procede d'usinage d'un accumulateur de combustible haute pression, accumulateur de combustible haute pression et raccord pour l'application du procede - Google Patents

Procede d'usinage d'un accumulateur de combustible haute pression, accumulateur de combustible haute pression et raccord pour l'application du procede Download PDF

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Publication number
EP1137879B1
EP1137879B1 EP00967580A EP00967580A EP1137879B1 EP 1137879 B1 EP1137879 B1 EP 1137879B1 EP 00967580 A EP00967580 A EP 00967580A EP 00967580 A EP00967580 A EP 00967580A EP 1137879 B1 EP1137879 B1 EP 1137879B1
Authority
EP
European Patent Office
Prior art keywords
pressure fuel
inner tube
fuel accumulator
high pressure
base body
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
EP00967580A
Other languages
German (de)
English (en)
Other versions
EP1137879A1 (fr
Inventor
Friedrich Boecking
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 EP1137879A1 publication Critical patent/EP1137879A1/fr
Application granted granted Critical
Publication of EP1137879B1 publication Critical patent/EP1137879B1/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
    • F02M55/02—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49231—I.C. [internal combustion] engine making

Definitions

  • the invention relates to a method for processing a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a base body which is equipped with a plurality of connection openings.
  • the invention also relates to a high-pressure fuel accumulator and a connecting piece for the application of the method.
  • a high-pressure pump possibly with the aid of a prefeed pump, delivers the fuel to be injected from a tank into the central high-pressure fuel accumulator, which is referred to as a common rail.
  • a common rail From the rail lead fuel lines 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. Due to the high-pressure fuel storage, the pressure generation and the injection are decoupled from each other.
  • a conventional high-pressure fuel storage is eg in the DE 29521402 U described.
  • the conventional high-pressure fuel accumulator can withstand pressures of up to about 1100 bar.
  • connection openings open tangentially into the interior of a tubular body.
  • the object of the invention is to increase the high pressure resistance of the known high-pressure fuel storage with simple measures.
  • the object underlying the invention is achieved in that in the base body, a rigid inner tube is arranged, whose outer contour corresponds to the desired inner contour of the base body in the region of the connection openings, and that the main body in the region of the connection openings from the outside with a plastic tool in the Inner tube is deformed.
  • the high-pressure resistance of the high-pressure fuel accumulator can be increased.
  • the rounding involves a great deal of effort and high costs. Due to the inventive mechanical deformation of the body, the high pressure resistance of the high-pressure fuel storage is increased in much simpler manner.
  • the high-pressure fuel storage according to the invention can withstand pressures of over 2000 bar.
  • the solution according to the invention can be combined with the known measures, such as the rounding of the intersections, in order to achieve even better results.
  • the solution according to the invention can also with an eccentric arrangement of Connection ports are combined.
  • An embodiment of the method according to the invention is characterized in that a rigid inner tube is arranged in the base body whose outer contour corresponds to the desired inner contour of the base body in the region of the connection openings, and in that the base body in the region of the connection openings from the outside with a tool plastically inwards is deformed.
  • the base body is compressed in the region of the transitions between the connection openings and the base body inwards.
  • the inner tube serves as a template for the base body in the region of the connection openings and remains in the base body after deformation. Due to the deformation of the base body, the region of the greatest tensile stress is removed from the region of the intersection, which has an advantageous effect on the high-pressure resistance of the high-pressure fuel accumulator.
  • Another particular embodiment of the method according to the invention is characterized in that the inner tube is elastically deformed during the plastic deformation of the base body. As a result, is achieved in the ideal state that the inner tube after completion of the deformation over the entire surface of the body.
  • Another particular embodiment of the method according to the invention is characterized in that a mandrel is introduced into the inner tube during the deformation of the base body. With the mandrel an undesirable plastic deformation of the inner tube is avoided during the deformation of the body.
  • connection bore 2 is arranged in the radial direction.
  • the connection bore 2 has two sections 3 and 4 with different inner diameters.
  • On the side facing the interior of the tubular body 1 side of the section 3 is arranged with a smaller diameter.
  • the smaller inner diameter section 3 is followed by the larger inner diameter section 4.
  • an internal thread 5 is formed in the section 4 with a larger inner diameter.
  • the internal thread 5 in the section 4 of the connection bore 2 interacts with an external thread, which is formed on the connecting piece 6.
  • the section 4 of the connecting bore 2 with a larger inner diameter serves to receive the end of a connection piece 6.
  • a through hole 7 is recessed, which connects the interior of the tubular body 1 with a (not shown) high-pressure fuel line.
  • an internal thread 8 is formed in the head of the connecting piece 6, an internal thread 8.
  • the head of the connecting piece 6 is provided with an external hexagon 9.
  • the hexagon socket 9 forms an attack surface for a tool.
  • the facing to the interior of the tubular body 1 end face of the connecting piece 6 accepts two functions according to the present invention.
  • the pressing of the end face of the connecting piece 6 against the portion 3 of the connection bore 2 ensures a seal of the high-pressure chamber of the high-pressure fuel storage to the environment, and on the other hand serves the end face of the connecting piece 6 for transmitting the force necessary for the deformation force on the section 3 of the connection hole 2.
  • the force necessary for the deformation is transmitted via the hexagon socket 9, the external thread 5 of the connecting piece 6 complementary to the internal thread 5 and the end face of the connection piece 6 facing the interior of the tubular base body 1 into the critical region of the section 3 of the connecting bore 2 with the smaller inner diameter ,
  • a defined tightening torque the deformation can be set defined.
  • the in the 4 and 5 illustrated embodiment of a high-pressure fuel accumulator according to the invention comprises a tubular body 21. From the interior of the tubular body 21 is in the radial direction of a connection bore 22 from. The connection bore 22 opens out into a connecting piece 23, which is formed on the tubular base body 21. The connecting piece 23 serves to connect a (not shown) high-pressure fuel line.
  • a circumferential groove 32 is formed. On the circumferential groove 32 engages a tool formed from two semicircular tool halves 24 and 25. The two tool halves 24 and 25 are acted upon in the direction of the arrows 26 and 27 with force and pressed against the tubular body 21. As a result, the tubular base body 21 deforms in the region of the connection bore 22.
  • an inner tube 28 is arranged inside the tubular body 21 inside the tubular body 21 inside the tubular body 21 inside the tubular body 21 inside the tubular body 21 inside the tubular body 21.
  • a dome-shaped recess 29 is formed in the region of the connection bore 22 inside the Inner tube.
  • a formed of two parts 30 and 31 mandrel Inside the Inner tube is arranged a formed of two parts 30 and 31 mandrel.
  • the inner tube 28 is positioned in the tubular base body 21 so that the dome-shaped recess 29 is located exactly in the region of the connection bore 22.
  • the tubular base body 21 is pressed into the dome-shaped recess 29 of the inner tube 28.
  • the inner tube 28 forms practically the template of the pressing process. With the mandrel 30, 31 an undesirable plastic deformation of the inner tube 28 is prevented.
  • the inner tube 28 In the plastic deformation of the tubular base body 21, it is important that the inner tube 28 is elastically mitverformt. In the ideal state, the inner tube 28 lies after the plastic deformation of the tubular base body 21 at least in the region of the connection bore 22 on the entire surface of the tubular base body 21.

Landscapes

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

Claims (3)

  1. Procédé d'usinage d'un accumulateur de carburant haute pression pour un système d'injection de carburant à rampe commune d'un moteur à combustion interne comportant un corps de base (21) muni de plusieurs orifices de branchement (22),
    le corps de base (21) étant déformé au niveau des orifices de branchement (22),
    caractérisé en ce que
    le corps de base (21) comporte un tube intérieur (28) rigide dont le contour extérieur correspond au contour intérieur souhaité du corps de base (21) au niveau des orifices de branchement (22) et
    le corps de base (21) est déformé plastiquement dans le tube intérieur (28) dans la région des orifices de branchement (22) à partir de l'extérieur à l'aide d'un outil (24, 25).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    le tube intérieur (28) se déforme élastiquement lors de la déformation plastique du corps de base (21).
  3. Procédé selon les revendications 1 ou 2,
    caractérisé en ce que
    pendant la déformation du corps de base (21) on introduit une broche (30, 31) dans le tube intérieur (28).
EP00967580A 1999-10-07 2000-09-19 Procede d'usinage d'un accumulateur de combustible haute pression, accumulateur de combustible haute pression et raccord pour l'application du procede Expired - Lifetime EP1137879B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19948338A DE19948338A1 (de) 1999-10-07 1999-10-07 Verfahren zur Bearbeitung eines Kraftstoffhochdruckspeichers, Kraftstoffhochdruckspeicher und Anschlussstutzen zur Anwendung des Verfahrens
DE19948338 1999-10-07
PCT/DE2000/003246 WO2001025616A1 (fr) 1999-10-07 2000-09-19 Systeme de localisation pour reseau de telecommunication cellulaire

Publications (2)

Publication Number Publication Date
EP1137879A1 EP1137879A1 (fr) 2001-10-04
EP1137879B1 true EP1137879B1 (fr) 2008-03-05

Family

ID=7924830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00967580A Expired - Lifetime EP1137879B1 (fr) 1999-10-07 2000-09-19 Procede d'usinage d'un accumulateur de combustible haute pression, accumulateur de combustible haute pression et raccord pour l'application du procede

Country Status (5)

Country Link
US (1) US6470856B1 (fr)
EP (1) EP1137879B1 (fr)
JP (1) JP2003511606A (fr)
DE (2) DE19948338A1 (fr)
WO (1) WO2001025616A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10001507A1 (de) * 2000-01-15 2001-07-19 Bosch Gmbh Robert Verfahren zur Einbringung einer Durchgangsöffnung in einen Kraftstoffhochdruckspeicher und Vorrichtung zur Durchführung des Verfahrens
DE10012961A1 (de) * 2000-03-16 2001-09-20 Bosch Gmbh Robert Bauteil, insbesondere Hochdruckteil für Kraftstoff-Einspritzsysteme, und Verfahren zur Herstellung eines solchen Bauteils
DE10056405B4 (de) * 2000-11-14 2005-06-16 Robert Bosch Gmbh Kraftstoffhochdruckspeicher für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE10132245A1 (de) * 2001-07-04 2003-01-23 Bosch Gmbh Robert Druckfester Hochdrucksammelraum
DE10140057B4 (de) * 2001-08-16 2007-08-30 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
DE10140058A1 (de) * 2001-08-16 2002-10-24 Bosch Gmbh Robert Verfahren zur Herstellung eines Kraftstoffhochdruckspeichers
DE10143519A1 (de) * 2001-09-05 2003-03-27 Siemens Ag Kraftstoffhochdruckspeicher für ein Speichereinspritzsystem
DE10152261A1 (de) 2001-10-20 2003-04-30 Bosch Gmbh Robert Hochdruckspeicher wie Kraftstoffhochdruckspeicher
DE10154645A1 (de) * 2001-11-07 2003-06-12 Siemens Ag Verfahren zum Herstellen einer Kraftstoffspeicherleitung mit einem vorgespannten Anschlussstück
DE10239379B4 (de) * 2002-08-25 2005-02-03 Umformtechnik Bäuerle GmbH Verfahren zur Bearbeitung eines Werkstücks für einen Kraftstoffhochdruckspeicher und Werkstück zur Anwendung des Verfahrens
DE10247323A1 (de) * 2002-10-10 2004-04-22 Robert Bosch Gmbh Innendruckbelastetes Bauteil, insbesondere für die Kraftstoffeinspritzung für Brennkraftmaschinen mit einem variablem Innendurchmesser
DE50302044D1 (de) * 2002-10-23 2006-02-02 Waertsilae Nsd Schweiz Ag Druckspeicher für ein Common Rail System
DE102007018471A1 (de) * 2007-04-19 2008-10-23 Robert Bosch Gmbh Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal
US8864478B2 (en) * 2007-06-04 2014-10-21 Caterpillar Inc. System and method for preloading a high stress area of a component
DE102007034720A1 (de) 2007-07-23 2009-01-29 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
DE102007043673B4 (de) * 2007-09-13 2009-10-15 Adcuram Maschinenbauholding Gmbh Verfahren zum sicheren Schließen eines Werkzeugs
DE102008013575B3 (de) * 2008-03-11 2009-08-13 Poppe & Potthoff Gmbh Kraftstoffverteilerbaugruppe
EP2392816B1 (fr) * 2010-06-03 2013-10-09 Delphi Technologies Holding S.à.r.l. Détente d'un système d'écoulement fluidique pressurisé
CN102022239A (zh) * 2010-12-29 2011-04-20 龙口龙泵燃油喷射有限公司 一种高压共轨系统的分体式轨

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JPH10176783A (ja) * 1996-10-18 1998-06-30 Usui Internatl Ind Co Ltd コモンレール

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JPH0466769A (ja) * 1990-07-05 1992-03-03 Nippondenso Co Ltd 高圧燃料継手
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DE29521402U1 (de) * 1995-12-23 1997-04-24 Bosch Gmbh Robert Kraftstoffeinspritzsystem
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CA2230745A1 (fr) * 1997-03-03 1998-09-03 Kikuo Asada Methode permettant d'ameliorer la resistance a la fatigue par suite d'une pression repetee a la partie d'un trou de branchement dans une piece pour fluide haute pression, partie de trou de branchement de la piece pour fluide haute pression formee a l'aide de cette methode et piece pour fluide haute pression possedant une glissiere integree recevant le trou d
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JP3846763B2 (ja) * 1997-03-03 2006-11-15 臼井国際産業株式会社 コモンレールの製造方法
JPH11182381A (ja) * 1997-12-16 1999-07-06 Toyota Motor Corp 蓄圧式内燃機関用蓄圧配管及びその製造方法
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GB9816264D0 (en) * 1998-07-24 1998-09-23 Lucas Ind Plc Connector
JP3888410B2 (ja) * 1998-09-01 2007-03-07 株式会社デンソー 高圧燃料供給装置
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Also Published As

Publication number Publication date
EP1137879A1 (fr) 2001-10-04
DE19948338A1 (de) 2001-04-12
US6470856B1 (en) 2002-10-29
DE50015020D1 (de) 2008-04-17
JP2003511606A (ja) 2003-03-25
WO2001025616A1 (fr) 2001-04-12

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