EP1062422A1 - Procede de montage d'un sous-groupe soupape d'une soupape d'injection de carburant - Google Patents

Procede de montage d'un sous-groupe soupape d'une soupape d'injection de carburant

Info

Publication number
EP1062422A1
EP1062422A1 EP99955812A EP99955812A EP1062422A1 EP 1062422 A1 EP1062422 A1 EP 1062422A1 EP 99955812 A EP99955812 A EP 99955812A EP 99955812 A EP99955812 A EP 99955812A EP 1062422 A1 EP1062422 A1 EP 1062422A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve sleeve
sleeve
magnetic circuit
valve seat
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
EP99955812A
Other languages
German (de)
English (en)
Other versions
EP1062422B1 (fr
Inventor
Klaus Noller
Hans Weidler
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 EP1062422A1 publication Critical patent/EP1062422A1/fr
Application granted granted Critical
Publication of EP1062422B1 publication Critical patent/EP1062422B1/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
    • 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
    • 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
    • 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
    • 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
    • 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
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body

Definitions

  • the invention is based on a method for assembling a valve assembly of a fuel injector according to the preamble of claim 1.
  • the core and the valve seat body are designed with an outer diameter such that they extend into the sleeve at the two ends, so that the sleeve completely surrounds the two components core and valve seat body in these protruding areas.
  • a valve needle with an armature moves axially, which is guided through the sleeve becomes.
  • the fixed connections of the sleeve to the core and the valve seat body are, for. B. achieved by welding, as is also known from DE-OS 43 10 819.
  • a thin-walled, non-magnetic sleeve is used as a connecting part between the core and the valve seat body
  • this sleeve largely corresponds to the sleeve known from US Pat. No. 4,946,107.
  • the volume and weight of the fuel injection valves can be reduced with the help of the tubular sleeves.
  • a fuel injector which has an elongated, thin-walled, non-magnetic sleeve which, in addition to its jacket section, also has a bottom section.
  • the bottom section runs largely perpendicular to the otherwise axial extension of the sleeve along the longitudinal axis of the valve.
  • a valve needle can move axially in a through opening of the sleeve.
  • a valve closing body which is fixedly connected to the valve needle interacts with a valve seat surface provided on a valve seat body, the valve seat body being pressed into the sleeve and directly or indirectly abutting the bottom portion of the sleeve with a perforated disk.
  • the sleeve is at least partially surrounded by a plastic coating.
  • the valve assembly of a fuel injector with the characterizing features of claim 1 has the advantage that it can be carried out inexpensively in a simple manner and thus ensures safe and reliable assembly of the fuel injector.
  • the outer magnetic circuit component, which conducts the magnetic flux can be fastened in the valve in a very simple manner without an additional joining method having to be used, it being possible advantageously to dispense with integral joining methods. This eliminates all the disadvantages of heat-based processes such as welding distortion.
  • the assembly of the valve is also simplified in that no tools are required to fasten the magnetic circuit component.
  • FIG. 1 shows a fuel injector with a valve assembly mounted according to the invention
  • FIG. 2 shows the valve assembly mounted according to the invention on a changed scale.
  • the electromagnetically actuated valve in the form of an injection valve for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines, which is shown by way of example in FIG an outer, sleeve-shaped and stepped, z.
  • Ferromagnetic valve casing 5 which represents an outer magnetic circuit component serving as an outer pole, is completely surrounded in the circumferential direction.
  • the magnet coil 1, the core 2 and the valve jacket 5 together form an electrically excitable actuating element.
  • the core 2 is introduced into an inner opening 11 of the valve sleeve 6 which is concentric with a longitudinal axis 10 of the valve.
  • the e.g. Ferritic valve sleeve 6 is elongated and thin-walled and has a jacket section 12 and a bottom section 13, the jacket section 12 defining the opening 11 in the circumferential direction and the bottom section 13 in the axial direction at its downstream end.
  • the opening 11 also serves as a guide opening for a valve needle 14 which is axially movable along the longitudinal axis 10 of the valve.
  • valve seat body 15 which e.g. sits on the bottom section 13 of the valve sleeve 6 and has a fixed valve seat surface 16 as a valve seat.
  • the valve needle 14 is formed, for example, by a tubular anchor section 17, a likewise tubular needle section 18 and a spherical valve closing body 19, the
  • Valve closing body 19 is fixedly connected to needle section 18, for example by means of a weld seam.
  • On the downstream end of the valve seat body 15 is, for. B. in a frustoconical recess 20 a flat spray washer 21 is arranged, the fixed connection of valve seat body 15 and spray orifice plate 21 z. B. is realized by a circumferential dense weld.
  • In the needle section 18 of the valve needle 14 there are one or A plurality of transverse openings 22 are provided so that fuel flowing through the armature section 17 in an inner longitudinal bore 23 can escape to the outside and flow along the valve closing body 19, for example along flats 24, up to the valve seat surface 16.
  • the injection valve is actuated electromagnetically in a known manner.
  • the electromagnetic circuit with the solenoid coil 1, the inner core 2, the outer valve jacket 5 and the armature section 17 serves to * axially move the valve needle 14 and thus to open against the spring force of a return spring 25 engaging the valve needle 14 or to close the injection valve.
  • the anchor section 17 is aligned with the end facing away from the valve closing body 19 on the core 2.
  • the spherical valve closing body 19 interacts with the valve seat surface 16 of the valve seat body 15 which tapers in the shape of a truncated cone and is formed in the axial direction downstream of a guide opening in the valve seat body 15.
  • the spray hole disk 21 has at least one, for example four, spray openings 27 formed by eroding, laser drilling or punching.
  • the insertion depth of the core 2 in the injection valve is, among other things, decisive for the stroke of the valve needle 14.
  • the one end position of the valve needle 14 when the magnet coil 1 is not excited is due to the system of the
  • Valve closing body 19 fixed to the valve seat surface 16 of the valve seat body 15, while the other end position of the valve needle 14 results when the solenoid coil 1 is excited due to the abutment of the armature section 17 at the downstream core end.
  • the stroke is set by a axial displacement of the core 2, which is produced, for example, by a machining process such as turning, and which is subsequently firmly connected to the valve sleeve 6 according to the desired position.
  • an adjusting element in the form of an adjusting spring 29 is inserted into a flow bore 28 of the core 2, which runs concentrically with the valve longitudinal axis 10 and serves to supply the fuel in the direction of the valve seat surface 16.
  • the adjusting spring 29 is used to adjust the spring preload of the return spring 25 abutting the adjusting spring 29, which in turn is supported with its opposite side on the valve needle 14, the dynamic spray quantity also being adjusted using the adjusting spring 29.
  • the adjusting element can also be designed as an adjusting bolt, adjusting sleeve etc. instead of an adjusting spring.
  • the injection valve described so far is characterized by its particularly compact design, so that a very small, handy injection valve is created.
  • These components form a pre-assembled, independent assembly, which is referred to below as functional part 30.
  • the functional part 30 thus essentially comprises the electromagnetic circuit 1, 2, 5 and a sealing valve (valve closing body 19, valve seat body 15) with a subsequent jet processing element (spray disk 21).
  • the coil space formed between the valve jacket 5 and the valve sleeve 6 and almost completely filled by the magnet coil 1 is limited in the direction facing the valve seat body 15 by a stepped radial region 32 of the valve jacket 5, while the closure on the side facing away from the valve seat body 15 is limited by a disc-shaped cover element 33 is guaranteed.
  • the coil body 3 extends through it in a recess in the cover element 33. In this area, for example, two contact pins 34 protrude from the plastic of the coil former 3. The electrical contacting of the magnetic coil 1 and thus its excitation takes place via the electrical contact pins 34.
  • the connecting part 40 is characterized above all by the fact that it comprises the electrical and the hydraulic connection of the fuel injector.
  • the connection part 40 which is largely designed as a plastic part, therefore has an as
  • a fuel filter 45 is inserted or pressed, for example, into a flow bore 43 of an inner tube 44 in the base body 42, which runs concentrically to the longitudinal axis 10 of the valve and flows from the inflow end of the fuel injection valve in the axial direction.
  • a hydraulic connection of the connecting part 40 and the functional part 30 is carried out when fully assembled
  • Fuel injection valve is achieved in that the flow bores 43 and 28 of both assemblies are brought together so that an unimpeded flow of fuel is ensured.
  • An inner opening 46 in the cover element 33 allows the valve sleeve 6 and thus also the core 2 to be designed such that both protrude through the opening 46 and at least the valve sleeve 6 projects significantly beyond the cover element 33 in the direction of the connecting part 40.
  • a lower end 47 of the tube 44 projects into the protruding part of the valve sleeve 6 into the opening 11 of the valve sleeve 6 to increase the connection stability.
  • the base body 42 sits, for example, on the cover element 33 and the upper end of the valve jacket 5.
  • the base body 42 also includes an integrally molded electrical connector 56.
  • the electrical contact elements 55 end at one end as exposed contact pins of the electrical connector 56, which are connected to a corresponding electrical connector, not shown, such as, for. B. a contact strip, can be connected for complete electrical contacting of the injection valve.
  • the contact elements 55 form an electrical connection with the corresponding contact pins 34.
  • FIG. 2 shows a valve assembly that can be mounted according to the invention, this valve assembly being essentially formed by the valve jacket 5, the valve sleeve 6 and the valve seat body 15.
  • the valve seat body 15 and the core 2 are arranged in the inner opening 11 of the valve sleeve 6, while the magnet coil 1 and the valve jacket 5 as an outer magnetic circuit component on the outer circumference of the
  • Valve sleeve 6 are arranged.
  • the valve jacket 5 is designed in such a way that it has a jacket region 58 that surrounds the coil space in the form of a jacket and a fastening region 59 that extends further toward the valve seat body 15.
  • the two areas 58 and 59 differ in their diameter. While the jacket area 58 has a significantly larger diameter than the valve sleeve 6 for forming the coil space and thus for receiving the magnet coil 1 including the coil former 3, the fastening area 59 is only designed with a slightly larger inside diameter than the outside diameter of the valve sleeve 6.
  • the radial region 32 is located between the jacket region 58 and the fastening region 59.
  • the valve jacket 5 is first pushed onto the valve sleeve 6 in order to assemble the described valve assembly.
  • the valve sleeve 6 and the valve jacket 5 have such toleranced dimensions that a loose pushing on without burr formation is guaranteed.
  • the valve jacket 5 is held in the desired position on the valve sleeve 6.
  • the valve seat body 15 is pushed into the inner opening 11 of the valve sleeve 6 in the downstream direction or pressed in due to its outer dimensions.
  • the valve seat body 15 is pushed until it abuts the bottom section 13 of the valve sleeve 6.
  • valve seat body 15 is widened at least in this partial section of the valve sleeve 6.
  • the valve seat body 15 receives an end position within the valve sleeve 6 in which it axially overlaps with the Fastening area 59 of the valve jacket 5 remains.
  • a firm connection of the valve sleeve 6 and the valve jacket 5 is achieved in this way solely by pressing in the valve seat body 15. Due to the axial overlap of valve seat body 15 and fastening area 59 of valve jacket 5, there is permanent radial pressure and sufficient tension, which makes it possible to dispense with an additional joining process, such as welding or flanging.

Landscapes

  • 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)

Abstract

L'invention concerne un procédé de montage d'un sous-groupe soupape d'une soupape d'injection de carburant destinée à des installations d'injection de carburant de moteurs à combustion interne. La soupape d'injection de carburant comprend un élément d'actionnement électromagnétique pourvu d'une bobine magnétique qui comporte un pôle intérieur et un composant de circuit magnétique (5) extérieur, ainsi qu'un obturateur mobile qui coopère avec un siège de soupape associé à un corps de siège de soupape (15). Le corps de siège de soupape (15) et le pôle intérieur sont disposés dans une ouverture (11) intérieure d'une douille de soupape (6) à paroi mince, et la bobine magnétique ainsi que le composant de circuit magnétique (5) extérieur sont disposés sur la périphérie extérieure de la douille de soupape (6). Dans un premier temps, le composant de circuit magnétique (5) est glissé sur la douille de soupape (6), puis le corps de siège de soupape (15) est pressé dans l'ouverture (11) intérieure de la douille de soupape (6), de telle sorte que l'enfoncement du corps de siège de soupape (15) crée un assemblage solide de la douille de soupape (6) et du composant de circuit magnétique (5).
EP99955812A 1999-01-08 1999-09-25 Procede de montage d'un sous-groupe soupape d'une soupape d'injection de carburant Expired - Lifetime EP1062422B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19900405 1999-01-08
DE19900405A DE19900405A1 (de) 1999-01-08 1999-01-08 Verfahren zur Montage einer Ventilbaugruppe eines Brennstoffeinspritzventils
PCT/DE1999/003097 WO2000040858A1 (fr) 1999-01-08 1999-09-25 Procede de montage d'un sous-groupe soupape d'une soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1062422A1 true EP1062422A1 (fr) 2000-12-27
EP1062422B1 EP1062422B1 (fr) 2004-03-24

Family

ID=7893749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99955812A Expired - Lifetime EP1062422B1 (fr) 1999-01-08 1999-09-25 Procede de montage d'un sous-groupe soupape d'une soupape d'injection de carburant

Country Status (8)

Country Link
US (1) US6543137B1 (fr)
EP (1) EP1062422B1 (fr)
JP (1) JP2002534639A (fr)
KR (1) KR20010052202A (fr)
CN (1) CN1116515C (fr)
DE (2) DE19900405A1 (fr)
RU (1) RU2237191C2 (fr)
WO (1) WO2000040858A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10103933A1 (de) 2001-01-30 2002-08-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10142974B4 (de) * 2001-09-01 2010-04-29 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005040361A1 (de) 2005-08-26 2007-03-01 Robert Bosch Gmbh Metallische Pressverbindung und Brennstoffeinspritzventil mit einer metallischen Pressverbindung
DE102005040363B4 (de) 2005-08-26 2017-09-14 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102007008863A1 (de) 2005-08-26 2008-08-28 Robert Bosch Gmbh Brennstoffeinspritzventil
CN101975129B (zh) * 2010-09-10 2012-05-02 冯政杰 一种电子式汽油电磁喷射阀
EP2441539A1 (fr) 2010-10-12 2012-04-18 Siemens VAI Metals Technologies GmbH Procédé à sortie d'énergie optimisée et installation de production d'une bande chaude en acier
EP2441540A1 (fr) 2010-10-12 2012-04-18 Siemens VAI Metals Technologies GmbH Procédé et installation de production à efficience énergétique d'une bande chaude en acier
JP5358621B2 (ja) * 2011-06-20 2013-12-04 日立オートモティブシステムズ株式会社 燃料噴射装置
DE102011089247A1 (de) 2011-12-20 2013-06-20 Robert Bosch Gmbh Brennstoffeinspritzventil
US8978364B2 (en) * 2012-05-07 2015-03-17 Tenneco Automotive Operating Company Inc. Reagent injector
EP3009657B1 (fr) * 2014-10-15 2019-03-13 Continental Automotive GmbH Ensemble boîtier pour un injecteur de carburant, injecteur de carburant et procédé de production de l'ensemble boîtier
CN106979110A (zh) * 2017-05-04 2017-07-25 柳州源创电喷技术有限公司 汽油机缸内直喷喷油器

Family Cites Families (9)

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US3570093A (en) * 1969-01-06 1971-03-16 Kelsey Hayes Co Method of making a wheel rim
US3949535A (en) * 1973-01-17 1976-04-13 King John O Jun Coldworked joint held by seamless tubular member
US4471643A (en) * 1982-02-10 1984-09-18 Fatigue Technology, Inc. Method and apparatus for prestressing fastener holes
US4946107A (en) 1988-11-29 1990-08-07 Pacer Industries, Inc. Electromagnetic fuel injection valve
DE4310819A1 (de) 1993-04-02 1994-10-06 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils
DE19547406B4 (de) * 1995-12-19 2007-10-31 Robert Bosch Gmbh Brennstoffeinspritzventil
DE19629589B4 (de) * 1996-07-23 2007-08-30 Robert Bosch Gmbh Brennstoffeinspritzventil
DE19631066A1 (de) * 1996-08-01 1998-02-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19827136A1 (de) * 1998-06-18 1999-12-23 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0040858A1 *

Also Published As

Publication number Publication date
JP2002534639A (ja) 2002-10-15
CN1116515C (zh) 2003-07-30
US6543137B1 (en) 2003-04-08
RU2237191C2 (ru) 2004-09-27
CN1292847A (zh) 2001-04-25
WO2000040858A1 (fr) 2000-07-13
DE19900405A1 (de) 2000-07-13
EP1062422B1 (fr) 2004-03-24
DE59908956D1 (de) 2004-04-29
KR20010052202A (ko) 2001-06-25

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