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EP1570172A1 - Procede de realisation d'accumulateurs de carburant haute pression - Google Patents

Procede de realisation d'accumulateurs de carburant haute pression

Info

Publication number
EP1570172A1
EP1570172A1 EP03785495A EP03785495A EP1570172A1 EP 1570172 A1 EP1570172 A1 EP 1570172A1 EP 03785495 A EP03785495 A EP 03785495A EP 03785495 A EP03785495 A EP 03785495A EP 1570172 A1 EP1570172 A1 EP 1570172A1
Authority
EP
European Patent Office
Prior art keywords
pressure fuel
base body
connection
fastening
tubular base
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
EP03785495A
Other languages
German (de)
English (en)
Other versions
EP1570172B1 (fr
Inventor
Georg Weigl
Wolfgang Buchhauser
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1570172A1 publication Critical patent/EP1570172A1/fr
Application granted granted Critical
Publication of EP1570172B1 publication Critical patent/EP1570172B1/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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/08—Modifying the physical properties of iron or steel by deformation by cold working of the surface by burnishing or the like
    • 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 high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, with a tubular base body, with a plurality of connections and with at least one fastening element, the tubular base body being formed in one piece with the connections and with the fastening element.
  • a high-pressure fuel dispenser for a fuel injection system of an internal combustion engine with a tubular base body and at least one connection for the fuel supply and the fuel removal.
  • the base body consists of a first tubular element and a second element arranged in the interior of the first tubular element.
  • a high-pressure fuel accumulator which is formed as a tubular base body by forging, also with forging, integrally molded connections and fastening elements.
  • the connections and the fastening elements are each formed precisely on the tubular base body, which means that a different forging blank is required for each motor variant. This results in very high unit costs, especially for small series.
  • DE 199 36 534 A1 proposes to design the tubular base body with a continuous connection strip.
  • the connections can be made in the continuous connection strip by drilling as required.
  • the fastening elements are either clamped onto the tubular base body with fastening lugs or welded on.
  • the clamped fastening tabs However, they take up additional space and can become detached over time.
  • With the welded mounting brackets a certain distance between the individual mounting brackets must be maintained due to the welding process when applying the weld seams. This can lead to the fact that, in the case of very compact fuel prices, the size of the distributor is largely predetermined by the fastening tabs.
  • the object of the invention is to provide a simple and inexpensive method for producing a high-pressure fuel accumulator.
  • the invention is characterized in that a hollow profile of the tubular base body is extruded with at least one connecting bar and / or a fastening bar.
  • the extrusion profile has the advantage that the high-pressure fuel accumulator can be easily adapted to the engine conditions.
  • the hollow profile first leaves the extrusion press in the form of a long profile blank.
  • Several high-pressure fuel reservoirs can be produced from a blank profile.
  • the profile blank is divided into several pieces. Each section is separated from the profile blank in such a way that it already has the desired length. Since a hollow profile is already formed by the extrusion, the otherwise necessary, expensive and complicated deep hole drilling process is eliminated.
  • the connections can be made at almost any distance from one another in the connection strip formed in one piece with the base body.
  • the connections are preferably made by drilling.
  • the minimum distance between the individual connections is only limited by the strength of the component, ie only a minimum wall thickness between the individual connections has to be observed. This allows the connections to be individually and inexpensively adapted to the individual motor variants.
  • the fixing hole is drilled in the fixing strip in the same way. The method thus enables the production of very compact high-pressure fuel spokes.
  • the proposed high-pressure fuel reservoir is thus much easier and cheaper to manufacture than the previous solutions.
  • the method can also be used to implement low-cost high-pressure fuel stores, especially for small series or prototypes.
  • the superfluous material between the individual holes is separated from the corresponding strips by a separation process.
  • Removing the superfluous material results in a particularly weight-optimized high-pressure fuel reservoir. All known separation methods are suitable for removing the superfluous material. driving, cutting processes such as milling or planing are particularly advantageous.
  • Another preferred embodiment of the invention provides for the surface of the high-pressure fuel reservoir to be additionally strengthened by cold working.
  • Cold forming can be achieved, for example, by retightening the tube profile using a slightly smaller press die.
  • FIG. 1 shows a longitudinal section through a high-pressure fuel accumulator, with two connection strips and a fastening strip
  • FIG. 2 shows a cross section through the same high-pressure fuel reservoir
  • connection bore 3 shows a high-pressure fuel accumulator in which the excess material between the individual connection bores was separated from the connection strips by a separation process.
  • FIG. 1 shows a longitudinal section through the high-pressure fuel accumulator.
  • the high-pressure fuel accumulator 1 consists of a tubular base body 2 with a first connection strip 5, a second connection lead 6 and a fastening strip 7, which are formed in one piece with the tubular base body. Furthermore, the high-pressure fuel reservoir 1 has a longitudinal bore 13 which forms the high-pressure fuel reservoir.
  • a first connection 3 is introduced into the first connection bar 5 and is used to supply the high-pressure fuel accumulator 1 with fuel.
  • a second and a third connection 4 are introduced into the second connection strip 6 and are connected to the injection valves via lines (not shown).
  • the fastening bar 7 has mounting holes 8.
  • the fastening bores are preferably formed as a through hole and serve to receive fastening screws with which the high-pressure fuel accumulator 1 is fastened to the internal combustion engine.
  • the connections 3, 4 and the through bores 8 are preferably produced by drilling.
  • FIG. 2 shows a cross section of the high-pressure fuel accumulator 1 described in FIG. 1.
  • the cross-sectional profile with the longitudinal bore 13 is produced by extrusion.
  • a metal block heated to the pressing temperature is placed in a cylindrical receiving tube of the press and pressed by means of a stamp pressure through a die provided with the desired profile.
  • the block is previously punched during extrusion and the metal is pressed through the remaining space between the die opening and the mandrel by means of a mandrel arranged on the press die.
  • the connections 3, 4 and the fastening bores 8 have to be made in the high-pressure fuel accumulator 1 and the open ends of the longitudinal bore 13 have to be closed by appropriate sealing plugs, not shown.
  • the number, the position and the shape of the connections are not limited to the exemplary embodiment. The maximum number of connections results from the diameter of the connections and the minimum required wall thickness between the individual connections.
  • the connections do not have to open radially into the longitudinal bore 13, as shown in the exemplary embodiment, but can, for example, also run tangentially to the longitudinal bore 13.
  • Deviations from the circular cross section of the connections are also possible, such as elliptical cross sections.
  • FIG. 3 shows a high-pressure fuel accumulator 1 in which the superfluous material has been separated out from the connection strips 5, 6. This results in only three connecting pieces 9, 14 and 15 instead of the first or second connecting strip 5, 6. In this way, the weight of the high-pressure fuel accumulator 1 can be reduced considerably without reducing the strength of the component.
  • a milling process is preferably suitable as the separation process, as a result of which the superfluous material can be separated in a very simple and inexpensive manner.
  • the proposed method is thus suitable for forming a high-pressure fuel accumulator consisting of a tubular base body with integrally formed connection strips and at least one attachment strip in a very cost-effective manner.
  • the position of the connections can be freely selected along the connection strips.
  • the connections can be made very close to each other.
  • the mounting holes can also be arranged at a very close distance from each other.

Landscapes

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

Abstract

La présente invention concerne un procédé pour réaliser un accumulateur de carburant haute pression (1) destiné à un système d'injection de carburant d'un moteur à combustion interne, comprenant un corps de base tubulaire (2), au moins un raccord destiné à l'alimentation en carburant (3) et au moins un raccord destiné au refoulement de carburant, ainsi qu'au moins un élément de fixation, le corps de base tubulaire (2) doté des raccords (3, 4) et l'élément de fixation formant une seule pièce. Le profil creux du corps de base tubulaire est comprimé sous la forme d'une barre profilée avec les barres de raccord (5, 6) et la barre de fixation (7).
EP03785495A 2002-12-04 2003-11-05 Procede de realisation d'accumulateurs de carburant haute pression Expired - Lifetime EP1570172B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256703A DE10256703B3 (de) 2002-12-04 2002-12-04 Verfahren zur Herstellung von Kraftstoffhochdruckspeichern
DE10256703 2002-12-04
PCT/DE2003/003669 WO2004051075A1 (fr) 2002-12-04 2003-11-05 Procede de realisation d'accumulateurs de carburant haute pression

Publications (2)

Publication Number Publication Date
EP1570172A1 true EP1570172A1 (fr) 2005-09-07
EP1570172B1 EP1570172B1 (fr) 2006-07-19

Family

ID=31969766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03785495A Expired - Lifetime EP1570172B1 (fr) 2002-12-04 2003-11-05 Procede de realisation d'accumulateurs de carburant haute pression

Country Status (5)

Country Link
US (1) US20060053626A1 (fr)
EP (1) EP1570172B1 (fr)
JP (1) JP2006509144A (fr)
DE (2) DE10256703B3 (fr)
WO (1) WO2004051075A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1705366A1 (fr) * 2005-03-03 2006-09-27 Siemens Aktiengesellschaft Rampe à combustible de haute pression
JP6021220B2 (ja) * 2012-11-16 2016-11-09 ボッシュ株式会社 コモンレール

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795970A (en) * 1973-01-23 1974-03-12 A Keathley Processes for extruding a product
US4570602A (en) * 1982-08-23 1986-02-18 General Motors Corporation Fuel rail
US4470188A (en) * 1982-08-31 1984-09-11 The Babcock & Wilcox Company Method of mechanically prestressing a tubular apparatus
US4899712A (en) * 1983-06-21 1990-02-13 Gerard De Bruyn Fuel injection rail manufacturing means and process
JPS63125171U (fr) * 1987-02-09 1988-08-16
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
IT1223881B (it) * 1988-11-03 1990-09-29 Weber Srl Procedimento per la costruzione di un collettore di carburante atto ad alimentare carburante alle valvole dosatrici e polverizzatrici di un dispositivo di alimentazione di un motore a combustione interna
DE4126017A1 (de) * 1990-12-20 1992-07-02 Detlef Dipl Ing Bloecker Bremszylinder und verfahren zu seiner herstellung
DE29521402U1 (de) * 1995-12-23 1997-04-24 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzsystem
DE19720913C1 (de) * 1997-05-16 1998-08-20 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzsystem mit gemeinsamem Vorspeicher
DE19726991A1 (de) * 1997-06-25 1999-01-07 Bosch Gmbh Robert Ventil und Verfahren zur Herstellung eines Ventilsitzes für ein Ventil
DE19757117A1 (de) * 1997-12-20 1999-06-24 Bosch Gmbh Robert Verfahren zur Herstellung eines Ventilsitzkörpers für ein Brennstoffeinspritzventil und Brennstoffeinspritzventil
JP2001295723A (ja) * 2000-04-13 2001-10-26 Denso Corp 蓄圧式燃料噴射装置
US6705083B2 (en) * 2001-07-31 2004-03-16 Delphi Technologies, Inc. Master cylinder having a compact profile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004051075A1 *

Also Published As

Publication number Publication date
DE50304307D1 (de) 2006-08-31
DE10256703B3 (de) 2004-04-01
EP1570172B1 (fr) 2006-07-19
JP2006509144A (ja) 2006-03-16
US20060053626A1 (en) 2006-03-16
WO2004051075A1 (fr) 2004-06-17

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