EP1340907A2 - Procédé de fabrication d'une soupape d'injection de carburant - Google Patents

Procédé de fabrication d'une soupape d'injection de carburant Download PDF

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Publication number
EP1340907A2
EP1340907A2 EP03002436A EP03002436A EP1340907A2 EP 1340907 A2 EP1340907 A2 EP 1340907A2 EP 03002436 A EP03002436 A EP 03002436A EP 03002436 A EP03002436 A EP 03002436A EP 1340907 A2 EP1340907 A2 EP 1340907A2
Authority
EP
European Patent Office
Prior art keywords
valve
contact surface
fuel injection
injection valve
raised
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.)
Withdrawn
Application number
EP03002436A
Other languages
German (de)
English (en)
Other versions
EP1340907A3 (fr
Inventor
Sieghart Maier
Thomas Pauer
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 EP1340907A2 publication Critical patent/EP1340907A2/fr
Publication of EP1340907A3 publication Critical patent/EP1340907A3/fr
Withdrawn legal-status Critical Current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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9061—Special treatments for modifying the properties of metals used for fuel injection apparatus, e.g. modifying mechanical or electromagnetic properties

Definitions

  • Fuel iris valves are state of the art known, which have two components, which with flat contact surfaces abut each other.
  • the components for example a valve body and a valve holding body a fuel injector.
  • a high pressure duct passes through the two components, passed through the fuel under high pressure becomes.
  • An example of this is in DE 198 27 267 A1 shown fuel injector.
  • the method according to the invention for producing a fuel injection valve has the advantage that the sublime Surfaces quickly and inexpensively in a non-cutting process are producible.
  • the sublime Surfaces made by embossing. Particularly advantageous is this procedure when the raised surface in the uncured Condition of the corresponding component is impressed and the hardening of the contact surface only takes place after the embossing.
  • the Fuel injection valve has a first component 1, which is designed as a valve holding body 1, and a second Component 3, which is designed as a valve body 3.
  • the valve holding body 1 has a contact surface 101, which is flat is formed and on a contact surface 103 of the valve body 3 plan is present.
  • the valve holding body 1 and the valve body 3 are by a clamping nut 4 in the axial direction pressed together.
  • a bore 5 is in the valve body 3 formed in which a piston-shaped valve needle 7 is longitudinally displaceable is arranged.
  • the valve needle 7 is in one Section in the bore 5 facing away from the combustion chamber in a sealing manner and tapers towards the combustion chamber to form one Pressure shoulder 8.
  • valve needle goes at the combustion chamber end 7 in a valve sealing surface 14, which with a Combustion chamber end of the bore 5 formed valve seat 12 cooperates.
  • the pressure chamber 10 is on Height of the pressure shoulder 8 extends radially, and in this radial Expansion of the pressure chamber 10 opens into the valve body 3 and the valve holding body 1 running high pressure channel 11.
  • the high pressure channel 11 carries fuel with the desired one Injection pressure to the pressure chamber 10 and occurs in the process both through the contact surface 101 of the valve holding body 1 as well as the contact surface 103 of the valve body 3.
  • valve holding body 1 Coaxial to the bore 5 of the valve body 3 is in the valve holding body 1 a piston bore 20 is formed, the valve body 3 facing end designed as a spring chamber 26 is.
  • a valve piece 22 is longitudinally displaceable in the piston bore 20 arranged, which bears on the valve needle 7 and with its end facing away from the valve needle 7 a valve piston 24 abuts.
  • the valve needle 7, the pressure piece 22 and the valve piston 24 thus always move synchronously in the longitudinal direction of bore 5 or piston bore 20.
  • About the valve piston 24 is a force in the axial Direction exerted on the valve needle 7 by a in the drawing, not shown, is controllable.
  • Closing spring 28 is designed as a helical compression spring and due to their pre-tension always a force on the valve needle 7 exercises in the direction of the valve seat 12.
  • the power of Closing spring 28 is opposite the closing force, however exerted on the valve needle 7 via the valve piston 24 will, for the function of the fuel injector only of minor importance.
  • a predetermined fuel pressure which depends on the used Injection system can be 100 MPa to 200 MPa.
  • This pressure creates a hydraulic force the pressure shoulder 8 and on parts of the valve sealing surface 14, by the force acting in the axial direction on the Valve needle 7 is exercised.
  • a decrease or also an increase in the closing force that occurs via the valve piston 24 is exerted on the valve needle 7, the longitudinal movement the valve needle 7 and thus the injection of the fuel Taxes.
  • FIG 2 is a plan view of the contact surface 101 of the Valve holding body 1 can be seen together with an elevation, the the course of the height, the contact surface 101 along the line B-B makes it clear.
  • the passage of the high pressure duct 11 a raised surface 30 surrounds through the contact surface 101, which is ring-shaped.
  • two centering pin holes 32 in which corresponding centering pins in the fuel injector located for an exact alignment of the Provide valve body 3 to valve holding body 1.
  • the sublime Surface 30 has a surface opposite the other contact surface 101 Height h up, which is shown very high in elevation B-B is.
  • the height h is on the order of a few 1/10 mm, less than 1/10 mm depending on requirements.
  • the raised surface 30 is produced by an embossing process, where a stamp that is next to a smooth, flat surface has a depression in the form of the raised surface 30, is pressed against the contact surface 101. This is a very fast process, so the cost of this is well below the cost, for example, by a Electroerosion processes are required.
  • the valve holding body When the fuel injector is finished, the valve holding body must be 1 made of hardened steel to withstand the forces to be able to withstand high fuel pressure.
  • the Embossing is therefore carried out before the contact surface hardens 101 performed, that is, in a state in which the steel of the valve holding body 1 is still relatively soft. After this Introducing the raised surface 30 by the embossing process the contact surface 101 is hardened, the embossed shape the contact surface 101 is retained.
  • Figure 3 shows a further embodiment of a contact surface 101.
  • a further raised surface 30 on the contact surface 101 trained the same height and shape as the first sublime Has area and that on the opposite side the contact surface 101 is arranged. This gives you an even distribution of the contact pressure, as it is otherwise to a slight skew between the contact surfaces 101 and 103 come through the raised surface 30 can.
  • Figure 4 is another embodiment of the invention shown raised surface 30, the lower Part of FIG. 4 shows a section of the contact surface 101 of the valve holding body 1 shows and the upper part of the figure 4 shows a cross section through the valve holding body 1 along the Line A-A.
  • a stamp is pressed into the contact surface 101, which is V-shaped in cross section.
  • the stamp is an annular groove 35 around the passage of the high pressure channel 11 embossed, so that by the corresponding Form material displacement two ring beads 37 that limit the annular groove 35.
  • the end face of the ring beads 37 form the raised surface 30 or the raised surfaces 37, which increase the seal of the high pressure channel 11.
  • the opening angle ⁇ of the V-shaped stamp is about 60 °, the stamp having a depth t of 0.02 mm to 0.03 mm is impressed into the contact surface 101.
  • the posed Ring beads 37 thereby reach a height h of approximately 0.002 to 0.01 mm.
  • a distance b of the ring beads is expedient 37 from about 0.05 to 0.1 mm.
  • the stamp used can either only a corresponding ring burr with a V-shaped Cross-section include, or in addition to the ring ridge include a corresponding flat surface, the rest Area of the contact surface 101 resets, that is, the part that lies outside the raised areas 30.
  • the raised surfaces 30 When clamping the valve holding body 1 against the valve body 3, the raised surfaces 30 against the flat contact surface of the valve body 3 pressed. This takes place reshaping takes place, and the raised surfaces 30 become clearly indented. If you just want a slight increase in Surface pressure around the passage of the high pressure duct 11 around, a height of the raised surface 30 of 10 ⁇ m is sufficient up to 20 ⁇ m. It can also be provided that raised areas 30 both on the end face 101 of the valve holding body 1 and also on the end face 103 of the valve body 3 are. In addition, the raised surfaces 30 are in each conceivable design can be impressed into the contact surface 101, so that the method according to the invention also during the passage of several high pressure channels 11 through the contact surface 101 or the sealing of other cavities applied can be.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
EP03002436A 2002-03-01 2003-02-05 Procédé de fabrication d'une soupape d'injection de carburant Withdrawn EP1340907A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10209116 2002-03-01
DE2002109116 DE10209116A1 (de) 2002-03-01 2002-03-01 Verfahren zur Herstellung eines Kraftstoffeinspritzventils

Publications (2)

Publication Number Publication Date
EP1340907A2 true EP1340907A2 (fr) 2003-09-03
EP1340907A3 EP1340907A3 (fr) 2005-01-05

Family

ID=27675159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03002436A Withdrawn EP1340907A3 (fr) 2002-03-01 2003-02-05 Procédé de fabrication d'une soupape d'injection de carburant

Country Status (3)

Country Link
EP (1) EP1340907A3 (fr)
JP (1) JP2003254198A (fr)
DE (1) DE10209116A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005054522A1 (fr) * 2003-12-05 2005-06-16 Siemens Aktiengesellschaft Procede pour le durcissement selectif de surfaces d'etancheite
EP1757802A3 (fr) * 2005-08-26 2007-03-28 Robert Bosch Gmbh Dispositif de carburant à haute pression
EP1820957A2 (fr) * 2006-02-20 2007-08-22 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
US7712686B2 (en) 2004-09-13 2010-05-11 Denso Corporation Fuel injection valve
EP2392816A1 (fr) * 2010-06-03 2011-12-07 Delphi Technologies Holding S.à.r.l. Détente d'un système d'écoulement fluidique pressurisé
WO2012095384A1 (fr) * 2011-01-13 2012-07-19 Continental Automotive Gmbh Injecteur de combustible et procédé de fabrication d'un injecteur de combustible

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19827628A1 (de) 1998-06-20 1999-12-23 Daimler Chrysler Ag Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19827267A1 (de) 1998-06-18 1999-12-23 Bosch Gmbh Robert Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6116522A (en) * 1996-04-16 2000-09-12 Motorenfabrik Hatz Gmbh & Co. Kg Fuel injection device
DE19914720B4 (de) * 1999-03-31 2005-10-13 Siemens Ag Kraftstoffeinspritzventil für eine Brennkraftmaschine
DE10102233A1 (de) * 2001-01-19 2002-07-25 Bosch Gmbh Robert Kraftstoffhochdrucksystem für Brennkraftmaschinen
DE10213380B4 (de) * 2001-09-04 2010-08-12 Robert Bosch Gmbh Kraftstoffeinspritzventil für eine Brennkraftmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19827267A1 (de) 1998-06-18 1999-12-23 Bosch Gmbh Robert Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr
DE19827628A1 (de) 1998-06-20 1999-12-23 Daimler Chrysler Ag Kraftstoffeinspritzventil für Brennkraftmaschinen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005054522A1 (fr) * 2003-12-05 2005-06-16 Siemens Aktiengesellschaft Procede pour le durcissement selectif de surfaces d'etancheite
US7712686B2 (en) 2004-09-13 2010-05-11 Denso Corporation Fuel injection valve
EP1757802A3 (fr) * 2005-08-26 2007-03-28 Robert Bosch Gmbh Dispositif de carburant à haute pression
EP1820957A2 (fr) * 2006-02-20 2007-08-22 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
EP1820957A3 (fr) * 2006-02-20 2009-03-25 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
EP2392816A1 (fr) * 2010-06-03 2011-12-07 Delphi Technologies Holding S.à.r.l. Détente d'un système d'écoulement fluidique pressurisé
US8726942B2 (en) 2010-06-03 2014-05-20 Delphi International Operations Luxembourg, S.A.R.L. Stress relief in pressurized fluid flow system
WO2012095384A1 (fr) * 2011-01-13 2012-07-19 Continental Automotive Gmbh Injecteur de combustible et procédé de fabrication d'un injecteur de combustible

Also Published As

Publication number Publication date
EP1340907A3 (fr) 2005-01-05
DE10209116A1 (de) 2003-09-18
JP2003254198A (ja) 2003-09-10

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