EP0954696B1 - Soupape d'injection de carburant et procede permettant de produire un pointeau de soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant et procede permettant de produire un pointeau de soupape d'injection de carburant Download PDF

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Publication number
EP0954696B1
EP0954696B1 EP98949924A EP98949924A EP0954696B1 EP 0954696 B1 EP0954696 B1 EP 0954696B1 EP 98949924 A EP98949924 A EP 98949924A EP 98949924 A EP98949924 A EP 98949924A EP 0954696 B1 EP0954696 B1 EP 0954696B1
Authority
EP
European Patent Office
Prior art keywords
closing element
valve
element carrier
carrier
closing 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
EP98949924A
Other languages
German (de)
English (en)
Other versions
EP0954696A1 (fr
Inventor
Martin Andorfer
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 EP0954696A1 publication Critical patent/EP0954696A1/fr
Application granted granted Critical
Publication of EP0954696B1 publication Critical patent/EP0954696B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0667—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature acting as a valve or having a short valve body attached thereto
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • 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

Definitions

  • the invention is based on a fuel injector according to the preamble of claim 1 and a method for Manufacture of a valve needle of a fuel injector according to the preamble of claim 12.
  • the fuel injector according to the invention with the characterizing features of claim 1 and the method according to claim 12 has the advantage that in a particularly simple Inexpensive and reliable process Flow options for the fuel at the valve needle are producible.
  • the valve needle includes at least one Closing body carrier and a valve closing body.
  • the Closing body carrier is on its the valve closing body facing end so different from a circular ring profile shaped that at least two flow openings between the closing body carrier and the surface of the Valve closing body are formed by the fuel coming in freely from an internal longitudinal bore Can flow towards a valve seat surface.
  • the fuel flows up to Surface of the valve closing body inside the Closing body carrier.
  • Cross openings and slots in the closing body carrier which otherwise to exit the fuel from the inner sleeve opening of the closing body support are required. This eliminates also the problems associated with such transverse openings their processing (e.g. deburring).
  • valve closing body is particularly advantageous spherical, so that a particularly simple Center the valve closing body on the closing body carrier is possible.
  • the polygonal profile of the closing body carrier shows in same number of corner areas and edge areas that the Number of flow openings corresponds. At a Triangular profile gives the best compromise of possible large free cross section of the sum of the flow openings and good centering of the valve closing body on Closing body support.
  • the anchor can be used directly even serve as a closing body carrier, so that together with the valve closing body a two-part valve needle is present.
  • a valve needle is particularly simple and inexpensive to manufacture and has reduced through the Number of parts only the connection to be achieved from Valve closing body and closing body carrier.
  • the axially movable valve needle 13 is also the fixed core 2 in the longitudinal opening 9 of the sleeve 12 arranged.
  • the sleeve meets 12 also a sealing function, so that a in the injection valve dry solenoid 1 is present. It will also do that achieved that the disc-shaped cover 3, the Solenoid 1 completely covered on its upper side.
  • the inner opening 58 in the cover 3 allows the To form sleeve 12 and thus also the core 2 extended, so that both components protrude through opening 58 Stand out cover element 3.
  • valve seat body 14 which is a fixed Has valve seat surface 15 as a valve seat.
  • the Valve seat body 14 is, for example, with a of a laser generated second weld 16 firmly with the Valve jacket 5 connected.
  • the valve needle 13 is one tubular anchor 17 and a fixedly connected thereto, for example spherical valve closing body 18 formed, the anchor 17 immediately as Closing body carrier serves.
  • the valve closing body 18 has five flattenings 23 on its circumference, through which a fuel flow on the valve closing body 18 over to the valve seat 15 is allowed.
  • the injection valve is actuated in a known manner Way electromagnetic.
  • a return spring 25 or closing the injection valve serves the electromagnetic circuit with the magnetic coil 1, the inner core 2, the outer valve jacket 5 and the armature 17.
  • the armature 17 is connected to the valve closing body 18 end facing away from the core 2.
  • the spherical valve closing body 18 interacts with the tapered in the direction of flow Valve seat surface 15 of the valve seat body 14 together, the in the axial direction downstream of a guide opening 26 in Valve seat body 14 is formed.
  • the spray hole disc 20 has at least one, for example four through Eroding or stamping shaped injection openings 27.
  • the insertion depth of the core 2 in the injection valve is below other decisive for the stroke of the valve needle 13.
  • the one end position of the valve needle 13 is not at excited solenoid 1 by the system of Valve closing body 18 on the valve seat surface 15 of the Valve seat body 14 set while the other End position of the valve needle 13 when the solenoid coil 1 is excited by the installation of the armature 17 at the downstream end of the Kerns 2 results.
  • the stroke is adjusted by an axial Moving the core 2 in the sleeve 12, the corresponding the desired position subsequently firmly with the sleeve 12 is connected, whereby a laser welding to achieve a weld 22 is useful.
  • Flow bore 28 of the core 2 which is the supply of the Serves fuel in the direction of the valve seat surface 15 is in addition to the return spring 25, an adjusting sleeve 29 inserted.
  • the adjusting sleeve 29 is used to adjust the Spring preload of the adjoining the adjusting sleeve 29 Return spring 25, which in turn with their opposite side on a shoulder 28 of the armature 17th supports, including an adjustment of the dynamic Sprayed amount is done with the adjusting sleeve 29.
  • Such an injection valve is characterized by its particularly compact structure, so that a very small, Handy injection valve is created, the valve jacket 5 for example an outer diameter of only approx. 11 mm having.
  • the components described so far form one pre-assembled standalone assembly that functions as a functional part 30 can be called.
  • the finished set and assembled functional part 30 has z. B. an upper one End face 32 on, for example, two Stick out contact pins 33.
  • Figure 2 shows the anchor or closing body support 17 in one compared to Figure 1 enlarged scale with a Deformation tool 40 or 41.
  • the tubular anchor as Closure body carrier 17 is e.g. executed as a turned part, the in addition to an inner graded on the basis of paragraph 28 Longitudinal bore 45 also has a stepped outer contour.
  • the for example made of a ferritic material (e.g. 13% Chrome steel) manufactured closing body carrier 17 has a upper, the core 2 facing stop surface 42, which with a wear protection layer is provided, e.g. B. chrome-plated is.
  • first section 47 of larger diameter for example an annular guide surface 43 shaped to guide the axially movable Valve needle 13 in the sleeve 12 is used. Similar to paragraph 28 is in the inner longitudinal bore 45 on the outer contour Stage 46 is provided, through which in downstream Seen in the direction of a cross-sectional reduction in one second section 48 results. Sections 47 and 48 have larger and smaller outer diameters initially a circular cross-section.
  • the first possibility of deformation exists therein, a deforming tool 40 in the inner longitudinal bore 45 to introduce in section 48 and a desired Deform section 48 from the inside.
  • the second possibility of deformation provides a Deformation tool 41 on the outer circumference of section 48 to act to a desired deformation of the To reach section 48.
  • a die inserted and on outer circumference a deformation tool 41 are attached, with which the contour of the die in section 48 is reproduced.
  • Figure 4 is a sectional view of a section along the line IV-IV in Figure 3, which is particularly vivid Corners 60 and the edges 61 of the closing body support 17 and the flow openings 65 after the attachment of the Valve closing body 18 illustrates.
  • Particularly advantageous is forming tools 40, 41 with dies use with which a triangular profile can be generated. Due to the three corner areas 60 'and edge areas 61 'in the profile of section 48 arise three Flow openings 65. With three welds 63 to the The valve closing body 18 becomes edge regions 61 ′ attached.
  • the best results for a triangular profile Compromise of the largest possible free cross-section of the sum the flow openings 65 and good centering of the Valve closing body 18 on the closing body carrier 17. Conceivable are next to a triangular profile of the closing body support 17th but also profiles with two, four, five ( Figure 5) or possibly more corners 60 and edges 61.
  • FIG Valve needle 13 shown, in which the opposite to that in Figure 3 illustrated embodiment constant or equivalent parts by the same reference numerals Marked are.
  • the valve needle 13 according to FIG. 6 stands out compared to the valve needle shown in Figure 3 13 by their three parts.
  • valve closing body 18 is also as in above described manner by means of welds 63 firmly on the Valve needle 13 is provided, but not with the anchor here 17, but with the one that now serves as the closing body support Connecting part 50. All statements regarding the deformation of section 48 on the closing body support 17 of the example 2 are completely on the connecting part 50th of the example according to FIG. 6 transferable, since a comparable geometry and function are available.
  • valve closing body 18 due to the simple Centering is particularly preferred, but none Represents exclusivity. Rather, you can cylindrical shape with ball grinding (Figure 7), cylindrical with conical tip (Figure 8), cylindrical with two opposite cone tips shaped ( Figure 9), hemispherical, etc. Valve closing body 18 on closing body carrier 17, 50 be attached.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (14)

  1. Injecteur de carburant ayant un axe longitudinal (10), un noyau (2) entourant au moins partiellement une bobine électromagnétique (1), une aiguille d'injecteur (13) mobile axialement, qui comprend au moins un support d'organe d'obturation (17, 50) et un organe d'obturation de soupape (18),
    l'organe d'obturation (18) étant relié solidairement au support (17, 50) pour coopérer avec un siège à soupape (15) fixe, et
    le support d'organe d'obturation (17, 50) possédant un perçage intérieur allongé (45) qui arrive jusqu'à la surface de l'organe d'obturation (18),
    caractérisé en ce que
    le support (17, 50) de l'organe d'obturation comporte à son extrémité tournée vers l'organe d'obturation (18), un contour s'écartant d'un profil circulaire de telle sorte qu'au moins deux orifices de passage (65) en communication avec le perçage longitudinal (45), sont formés entre le support (17, 50) de l'organe d'obturation et la surface de l'organe d'obturation (18).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'extrémité du support (17, 50) de l'organe d'obturation, tourné vers l'organe d'obturation (18) a un contour de profil à trois arêtes.
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'extrémité du support d'organe d'obturation (17, 50) tourné vers l'organe d'obturation (18) a le contour d'un profil à 5 pans.
  4. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    l'extrémité avale du support d'organe d'obturation (17, 50) présente un nombre de zones de coins (60') et un nombre de zone d'arêtes (61'), égaux, qui correspondent également au nombre des orifices de passage (65).
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    chaque forme d'arête (61') ait une forme de fixation pour le corps d'obturation de soupape (18) sur le support d'organe d'obturation (17,50).
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    l'organe d'obturation (18) est relié solidairement aux zones d'arêtes (61') par les cordons de soudure (63).
  7. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    l'organe d'obturation de soupape (18) comporte à sa périphérie extérieure, plusieurs parties aplaties (23).
  8. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    le support d'organe d'obturation (17) est réalisé en forme d'induit.
  9. Injecteur de carburant selon l'une des revendications 1 à 7,
    caractérisé par
    une pièce de liaison (50) reliant l'induit (17) et l'organe d'obturation (18), cette pièce de liaison servant de support à l'organe d'obturation.
  10. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    le support d'organe d'obturation (17, 50) est une pièce tournée ou une pièce pressée à froid.
  11. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le corps de l'organe d'obturation (18) est de forme sphérique.
  12. Procédé de réalisation d'une aiguille (13) d'un injecteur de carburant selon l'une des revendications 1 à 11,
    caractérisé en ce que
    dans une première étape du procédé on réalise un support d'organe d'obturation (17, 50) métallique, avec un perçage longitudinal intérieur (45) de section circulaire et un contour extérieur de forme circulaire ainsi qu'un organe d'obturation de soupape (18),
    puis on déforme plastiquement l'extrémité du support d'organe d'obturation (17, 50) qui sera ultérieurement du côté de l'organe d'obturation (18) en utilisant un outil de formage (40, 41) pour que le support d'organe d'obturation (17, 50) possède dans cette zone un contour différent d'un profil en anneau de cercle avec au moins deux zones de coins (60') et des zones d'arêtes (61'), et
    dans une étape suivante on fixe l'organe d'obturation (18) à l'extrémité déformée du support d'organe d'obturation (17, 50).
  13. Procédé selon la revendication 12,
    caractérisé en ce que
    l'on fixe un induit (17) à l'extrémité du support ou organe d'obturation (50) du côté opposé à celui de l'organe d'obturation (18).
  14. Procédé selon la revendication 12 ou 13,
    caractérisé en ce que
    l'outil de formage (40, 41) prend dans le perçage longitudinal intérieur (45) et/ou à la périphérie externe du support d'organe d'obturation (17, 50).
EP98949924A 1997-11-22 1998-08-20 Soupape d'injection de carburant et procede permettant de produire un pointeau de soupape d'injection de carburant Expired - Lifetime EP0954696B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19751847A DE19751847A1 (de) 1997-11-22 1997-11-22 Brennstoffeinspritzventil und Verfahren zur Herstellung einer Ventilnadel eines Brennstofeinspritzventils
DE19751847 1997-11-22
PCT/DE1998/002434 WO1999027246A1 (fr) 1997-11-22 1998-08-20 Soupape d'injection de carburant et procede permettant de produire un pointeau de soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP0954696A1 EP0954696A1 (fr) 1999-11-10
EP0954696B1 true EP0954696B1 (fr) 2003-05-21

Family

ID=7849551

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98949924A Expired - Lifetime EP0954696B1 (fr) 1997-11-22 1998-08-20 Soupape d'injection de carburant et procede permettant de produire un pointeau de soupape d'injection de carburant

Country Status (4)

Country Link
EP (1) EP0954696B1 (fr)
JP (1) JP2001509855A (fr)
DE (2) DE19751847A1 (fr)
WO (1) WO1999027246A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006020689A1 (de) * 2006-05-04 2007-11-08 Robert Bosch Gmbh Magnetventil mit stoffschlüssiger Ankerverbindung
DE102010040910A1 (de) * 2010-09-16 2012-03-22 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102010040898A1 (de) 2010-09-16 2012-03-22 Robert Bosch Gmbh Brennstoffeinspritzventil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4483485A (en) * 1981-12-11 1984-11-20 Aisan Kogyo kabuskiki Kaisha Electromagnetic fuel injector
JPS6287661A (ja) * 1985-10-15 1987-04-22 Diesel Kiki Co Ltd 電磁式燃料噴射弁
DE3825135A1 (de) * 1988-07-23 1990-01-25 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE3831196A1 (de) 1988-09-14 1990-03-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE4008675A1 (de) 1990-03-17 1991-09-19 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil

Also Published As

Publication number Publication date
DE19751847A1 (de) 1999-05-27
DE59808457D1 (de) 2003-06-26
JP2001509855A (ja) 2001-07-24
EP0954696A1 (fr) 1999-11-10
WO1999027246A1 (fr) 1999-06-03

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