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US20060053626A1 - Method for producing high-pressure fuel accumulators - Google Patents

Method for producing high-pressure fuel accumulators Download PDF

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Publication number
US20060053626A1
US20060053626A1 US10/536,924 US53692405A US2006053626A1 US 20060053626 A1 US20060053626 A1 US 20060053626A1 US 53692405 A US53692405 A US 53692405A US 2006053626 A1 US2006053626 A1 US 2006053626A1
Authority
US
United States
Prior art keywords
pressure fuel
base body
fixing
fuel accumulator
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.)
Abandoned
Application number
US10/536,924
Other languages
English (en)
Inventor
Wolfgang Buchhauser
Georg Weigl
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
Original Assignee
Siemens AG
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 filed Critical Siemens AG
Publication of US20060053626A1 publication Critical patent/US20060053626A1/en
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BUCHHAUSER, WOLFGANG, WEIGL, GEORG
Abandoned 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
    • 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, comprising a tubular base body, a plurality of connections and at least one fixing element, whereby the tubular base body is embodied as a single component with the connections and the fixing element.
  • a high-pressure fuel accumulator for a fuel injection system of an internal combustion engine is known from DE 197 20 913 C1, comprising a tubular base body and at least one connection for the fuel supply and the fuel discharge.
  • 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 is known from DE 295 21 402 U1 which is formed as a tubular base body by forging, with connections and fixing elements likewise formed as a single component by forging.
  • the connections and also the fixing elements are formed to fit precisely on the tubular base body in each case, as a result of which a different forging blank is required in each case for each engine variant. This results in very high unit costs with regard to small-scale series production in particular.
  • DE 199 36 534 A1 proposes a method whereby the tubular base body is formed with a continuous connector strip.
  • the connections can be incorporated in the continuous connector strip as required by drilling.
  • the fixing elements are either clamped or welded onto the tubular base body by means of fixing lugs.
  • the clamped fixing lugs have an additional space requirement and can come loose in time.
  • the welded fixing lugs as a result of the welding operation a certain distance must be maintained between the individual fixing lugs when applying the welding seams. This can have the result that in the case of extremely compact fuel distribution systems the construction size of the distribution system is largely predetermined by the fixing lugs.
  • the object of the invention is to provide a simple and cost-effective method for producing a high-pressure fuel accumulator.
  • the invention is characterized in that a hollow profile of the tubular base body is profile-extruded with at least one connector strip and/or one fixing strip.
  • the profile extrusion presses offer the advantage that the high-pressure fuel accumulator can be individually adapted in a simple manner to suit the engine conditions.
  • the hollow profile initially leaves the profile extrusion press in the form of a long profile blank.
  • a plurality of high-pressure fuel accumulators can be produced from one profile blank.
  • the profile blank is divided into a plurality of pieces. Each individual piece is separated from the profile blank in such a way that it actually has the desired length. Since a hollow profile is actually formed by the profile extrusion presses, the costly and complicated deep hole drilling process which is otherwise needed is not required.
  • connections can be incorporated into the connector strip formed as a single component with the base body at almost any desired spacing from one another.
  • the connections are preferably incorporated by means of drilling.
  • the minimum spacing between the individual connections is restricted only by the component strength, in other words only a minimum wall thickness between the individual connections needs to be maintained.
  • the fixing drill hole is incorporated into the fixing strip in the same manner. The method thus makes it possible to produce extremely compact high-pressure fuel accumulators.
  • the method likewise allows changes to the profile to be implemented quickly and inexpensively since it is simply necessary to exchange the extruding die for different profiles. This is very favorably priced on account of its simple structure.
  • the proposed high-pressure fuel accumulator can thus be produced in a significantly simpler and more cost effective manner when compared with the previous solutions.
  • the method means that it is possible to implement favorably priced high-pressure fuel accumulators particularly also for small-scale series production or prototypes.
  • connection hole has been incorporated into the connector strip or after the fixing holes have been incorporated into the fixing strip
  • the superfluous material between the individual holes is removed from the corresponding strips by means of a separating method.
  • individual connecting pieces or fixing elements are produced in place of the strips.
  • a particularly weight-optimized high-pressure fuel accumulator is obtained by removing the superfluous material. All known separating methods are suitable for removing the superfluous material; machining methods such as milling or planning are particularly advantageous.
  • a further preferred embodiment of the invention makes provision for additionally hardening the surface of the high-pressure fuel accumulator by means of cold working.
  • Cold working can be achieved for example by redrawing the tube profile through a slightly smaller extruding die.
  • FIG. 1 shows a longitudinal section through a high-pressure fuel accumulator, having two connector strips and also one fixing strip,
  • FIG. 2 shows a cross-section through the same high-pressure fuel accumulator
  • FIG. 3 shows a high-pressure fuel accumulator in which the superfluous material between the individual connection holes has been removed from the connector strips by means of a separating method.
  • FIG. 1 shows a longitudinal section through the high-pressure fuel accumulator.
  • the high-pressure fuel accumulator 1 comprises a tubular base body 2 having a first connector strip 5 , a second connector strip 6 and also a fixing strip 7 , which are formed as a single component with the tubular base body.
  • the high-pressure fuel accumulator 1 has a longitudinal hole 13 which forms the high-pressure fuel accumulator.
  • a first connection 3 which serves to supply the high-pressure fuel accumulator 1 with fuel is incorporated into the first connector strip 5 .
  • a second and a third connection 4 which are connected to the injection valves by way of lines that are not shown are incorporated into the second connector strip 6 .
  • the fixing strip 7 has fixing holes 8 .
  • the fixing holes preferably take the form of a through-hole and serve to receive fixing screws with which the high-pressure fuel accumulator 1 is fixed to the internal combustion engine.
  • the connections 3 , 4 and also the through-holes 8 are preferably produced by drilling.
  • FIG. 2 shows a cross-section through the high-pressure fuel accumulator 1 described with reference to FIG. 1 .
  • the cross-sectional profile with the longitudinal hole 13 is produced using extrusion presses.
  • a metal block heated to the press temperature is introduced into a cylindrical receiving tube in the press and is pressed by means of a stamp pressure through a die provided with the desired profile.
  • the block is perforated beforehand and the metal is pressed by means of a mandrel located on the press stamp through the space remaining between the die opening and the mandrel.
  • connections 3 , 4 and also the fixing holes 8 then need to be introduced in the high-pressure fuel accumulator 1 and the open ends of the longitudinal hole 13 need to be sealed by means of suitable plugs which are not shown.
  • the number, position and form of the connections are naturally not restricted to the embodiment.
  • the maximum number of connections is given by the diameter of the connections and the minimum required wall thickness between the individual connections.
  • the connections do not, as shown in the embodiment, need to enter the longitudinal hole 13 radially but can also run tangentially to the longitudinal hole 13 , for example. Deviations from a circular cross-section for the connections are also possible, such as elliptical cross-sections for example.
  • FIG. 3 shows a high-pressure fuel accumulator 1 in which the superfluous material has been removed from the connector strips 5 , 6 .
  • a suitable separating method is preferably a milling method, by which means the removal of the superfluous material can take place in a very simple and cost-effective manner.
  • the proposed method is thus suitable in a very cost-effective manner for developing a high-pressure fuel accumulator comprising a tubular base body with connector strips formed as a single component and at least one fixing strip.
  • the position of the connections can be freely selected as desired along the connector strips. In this situation, the connections can be incorporated at very close spacing from one another.
  • the fixing holes can be arranged at very close spacing from one another.
  • the superfluous material can be removed from the high-pressure fuel accumulator by means of a separating method, as a result of which a weight minimization can be achieved for the high-pressure fuel accumulator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US10/536,924 2002-12-04 2003-11-05 Method for producing high-pressure fuel accumulators Abandoned US20060053626A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256703.4 2002-12-04
DE10256703A DE10256703B3 (de) 2002-12-04 2002-12-04 Verfahren zur Herstellung von Kraftstoffhochdruckspeichern
PCT/DE2003/003669 WO2004051075A1 (fr) 2002-12-04 2003-11-05 Procede de realisation d'accumulateurs de carburant haute pression

Publications (1)

Publication Number Publication Date
US20060053626A1 true US20060053626A1 (en) 2006-03-16

Family

ID=31969766

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/536,924 Abandoned US20060053626A1 (en) 2002-12-04 2003-11-05 Method for producing high-pressure fuel accumulators

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

Citations (11)

* 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
US4470188A (en) * 1982-08-31 1984-09-11 The Babcock & Wilcox Company Method of mechanically prestressing a tubular apparatus
US4570602A (en) * 1982-08-23 1986-02-18 General Motors Corporation Fuel rail
US4823754A (en) * 1987-02-09 1989-04-25 Aisin Seiki Kabushiki Kaisha Retaining apparatus for fuel injector in internal combustion engine
US4899712A (en) * 1983-06-21 1990-02-13 Gerard De Bruyn Fuel injection rail manufacturing means and process
US4979295A (en) * 1988-05-13 1990-12-25 Weber S.R.L. Process for the manufacture of a fuel manifold for an internal combustion engine fuel supply system
US5319849A (en) * 1990-12-20 1994-06-14 Detlef Bloecker Method of manufacturing a brake cylinder
US6173914B1 (en) * 1997-06-25 2001-01-16 Robert Bosch Gmbh Valve and method for producing a valve seat for a valve
US6189816B1 (en) * 1997-12-20 2001-02-20 Robert Bosch Gmbh Method for producing a valve-seat body for a fuel injection valve, and corresponding fuel injection valve
US20010029929A1 (en) * 2000-04-13 2001-10-18 Tetsushi Natsume Common rail fuel injection system
US6705083B2 (en) * 2001-07-31 2004-03-16 Delphi Technologies, Inc. Master cylinder having a compact profile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Patent Citations (12)

* 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
US4823754A (en) * 1987-02-09 1989-04-25 Aisin Seiki Kabushiki Kaisha Retaining apparatus for fuel injector in internal combustion engine
US4979295A (en) * 1988-05-13 1990-12-25 Weber S.R.L. Process for the manufacture of a fuel manifold for an internal combustion engine fuel supply system
US5319849A (en) * 1990-12-20 1994-06-14 Detlef Bloecker Method of manufacturing a brake cylinder
US6173914B1 (en) * 1997-06-25 2001-01-16 Robert Bosch Gmbh Valve and method for producing a valve seat for a valve
US6189816B1 (en) * 1997-12-20 2001-02-20 Robert Bosch Gmbh Method for producing a valve-seat body for a fuel injection valve, and corresponding fuel injection valve
US20010029929A1 (en) * 2000-04-13 2001-10-18 Tetsushi Natsume Common rail fuel injection system
US6497219B2 (en) * 2000-04-13 2002-12-24 Denso Corporation Common rail fuel injection system
US6705083B2 (en) * 2001-07-31 2004-03-16 Delphi Technologies, Inc. Master cylinder having a compact profile

Also Published As

Publication number Publication date
DE50304307D1 (de) 2006-08-31
WO2004051075A1 (fr) 2004-06-17
EP1570172A1 (fr) 2005-09-07
DE10256703B3 (de) 2004-04-01
EP1570172B1 (fr) 2006-07-19
JP2006509144A (ja) 2006-03-16

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BUCHHAUSER, WOLFGANG;WEIGL, GEORG;REEL/FRAME:021335/0304;SIGNING DATES FROM 20050307 TO 20050309

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION