EP0222131B1 - Soupape électromagnétique d'injection de combustible - Google Patents

Soupape électromagnétique d'injection de combustible Download PDF

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Publication number
EP0222131B1
EP0222131B1 EP86113487A EP86113487A EP0222131B1 EP 0222131 B1 EP0222131 B1 EP 0222131B1 EP 86113487 A EP86113487 A EP 86113487A EP 86113487 A EP86113487 A EP 86113487A EP 0222131 B1 EP0222131 B1 EP 0222131B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve needle
fuel injection
hollow space
closing element
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
Application number
EP86113487A
Other languages
German (de)
English (en)
Other versions
EP0222131A3 (en
EP0222131A2 (fr
Inventor
Andreas Sausner
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO 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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Priority to AT86113487T priority Critical patent/ATE49033T1/de
Publication of EP0222131A2 publication Critical patent/EP0222131A2/fr
Publication of EP0222131A3 publication Critical patent/EP0222131A3/de
Application granted granted Critical
Publication of EP0222131B1 publication Critical patent/EP0222131B1/fr
Expired 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
    • F02M51/0671—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
    • F02M51/0675—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 valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—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 valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve

Definitions

  • the invention relates to an electromagnetically actuated fuel injection valve for injection systems of internal combustion engines, with a spherical segment-shaped closing member which is connected via a valve needle to an armature of an electromagnet fastened thereon and a spring acting in the closing direction, the closing member being perpendicular to the axis of the valve needle while overcoming the Stiction is displaceable and the end surface of the valve needle is flat.
  • Such a fuel injector representing the generic term is known from GB-A 2 080 415.
  • the embodiments of the valve closing member disclosed therein have an essentially spherical section-like shape, the spherical section cooperating with the conical valve seat, while the surface delimiting the spherical section lies against the flat surface of the valve needle.
  • valve seat and the surface of the valve closing member delimiting the spherical section creates a tilting moment on the valve closing member in the event of a radial offset from the restoring force, which makes perfect sealing difficult. This is particularly the case if the direction of the valve axis deviates from the direction of the axis of the valve seat.
  • the closing member therefore has a cavity delimited by a flat surface, on which the end surface of the valve needle rests.
  • the arrangement is such that both surfaces, namely the surface of the closing member delimiting the cavity and the end surface of the valve needle are located approximately in the plane of the valve seat.
  • a self-centering valve member with support of the valve member in the plane of the valve seat is known from US-A 1 942 417, but it is a check valve for a sewage pump.
  • the end of the valve needle protruding into the cavity of the closing member is designed in the form of a stamp, the opening of the cavity has a smaller diameter than the cavity itself and the stamped end of the valve needle has a diameter which is smaller than the diameter of the cavity , but larger than the diameter of the opening.
  • the closing member consists of two parts, one part of which is approximately hemispherical and faces the valve seat and the other part, which is arranged coaxially with the first part, comprises the opening of the cavity.
  • a spring element is then preferably inserted between the stamp-shaped end of the valve needle and the part of the closing element which forms the opening of the cavity.
  • a fuel injection nozzle for internal combustion engines in which a spool is provided on a valve needle downstream of the actual valve sealing cone and is coupled to the valve needle in such a way that it can be displaced radially to the valve needle within narrow limits.
  • a tube 1, a flange-like part 2 of the tube 1 and the housing 3 form a magnetically conductive core for the magnet coil 4, which is arranged on a winding body 5.
  • Seals 6, 7 are provided between the winding body 5 on the one hand and the tube 1 and the housing 3 on the other hand.
  • the tube 1 also serves as a connection for the fuel line.
  • a plastic body 9 forms, together with a contact 10, the electrical connection for the magnet coil 4.
  • a valve needle 12 is mounted in a guide part 11 and is pressed with its lower part against the valve seat 14 by a coil spring 13.
  • the valve seat 14 is part of a spray opening 15 provided in the guide part 11, which continues in an opening of the cap 16.
  • An armature 17 is provided at the end of the valve needle 12 opposite the spray opening 15, which armature is drawn against the spring force in the direction of the tube 1 when the solenoid 4 is energized and thus opens the valve.
  • valve needle 12 In known fuel injection valves, the end of the valve needle serving as the closing member is now conical, so that it rests in an annular shape on the surface of the valve seat 14. In order to achieve a sufficient sealing effect, extremely small manufacturing tolerances must be observed both for the valve needle 12 itself and for the guide member 11.
  • a closing member 18 is connected to the valve needle 12 in such a way that it can be displaced perpendicularly with respect to the axis of the valve needle 12.
  • a hemispherical closing member 18 is provided in the fuel injection valve according to FIG. 1, which is attached to the valve needle 12 in a manner explained in connection with FIG. 2.
  • Fig. 2 shows on a larger scale than Fig. 1 a section through the closing member 18.
  • the closing member 18 consists of a substantially hemispherical part 19 and a part 20.
  • the closing member 18 forms a cavity 21 in which the valve needle 12 with its stamped end 22 protrudes. Both the diameter of the cavity 21 and the diameter of the opening 23 in the part 20 are chosen so large that the closing member 18 can move relative to the axis of the valve needle 12 as far as is necessary with regard to the tolerances of the valve needle 12 and their storage .
  • An annular spring 24 ensures that the end surface 25 of the valve needle is pressed against the surface 26 of the hemispherical part 19.
  • the pressure force is so great that the closing member 18 does not move with respect to the valve needle 12 when the valve is open.
  • the adhesive force generated by the pressure is therefore greater than the forces which occur when the valve is open, for example due to vibrations, and which could cause a shift.
  • the closing element is therefore not readjusted with every closing operation, but only when it is necessary. An initial adjustment is therefore carried out with the first start-up, for example during the test after the fuel injector has been installed. Further adjustments are only made if changes occur during the service life of the fuel injector.
  • FIG. 3 the closing member 18, the valve block 14 and the valve needle 12 are shown for different, each greatly exaggerated storage of the valve needle axis.
  • the valve needle axis is displaced parallel to its nominal position.
  • the arrangement is shown in a phase of movement of the closing process in which the closing element 18 not lying in the axis touches the valve seat 14 on one side.
  • the closing member 18 then slides into the valve seat 14 with simultaneous displacement relative to the valve needle axis and is thus adjusted.
  • valve needle axis is tilted, which in itself could be compensated for by the hemispherical closing member 18.
  • the tilting did not take place around the center of the ball, there is at the same time a displacement of the valve needle axis from the valve axis in the region of the closing member. This is compensated for by the displacement of the closing member 18 on the valve needle 12.

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)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (4)

1. Soupape d'injection de carburant, actionnée électromagnétiquement, pour groupe d'injection de moteur à combustion interne, comportant un obturateur (18) en forme de calotte sphérique, qui est relié par une tige (12) à l'armature (17), fixée à cette tige, d'un électro-aimant (1-5), ainsi qu'un ressort (13) agissant dans le sens de fermeture, cet obturateur (18) pouvant se déplacer perpendiculairement à l'axe de la tige en surmontant le frottement statique, et la surface (25) de l'extrémité de cette tige étant plane, soupape caractérisée en ce que l'obturateur (18) comporte une cavité (21) limitée par une surface plane (26) contre laquelle la surface (25) de l'extrémité de la tige (12) est appliquée et en ce que, lorsque la soupape est fermée, ces deux surfaces (25, 26) se trouvent sensiblement dans le plan du siège (14) de cette soupape.
2. Soupape d'injection de carburant, actionnée électromagnétiquement, selon la revendication 1, soupape caractérisée en ce que l'extrémité (22) de la tige (12), qui pénètre dans la cavité (21) de l'obturateur, a la conformation d'un tampon, l'orifice (23) de cette cavité (21) a un diamètre plus petit que ladite cavité (21), et l'extrémité (22), en forme de tampon, de la tige (12) a un diamètre, qui est plus petit que celui de cette cavité (21), mais plus grand que celui de l'orifice (23).
3. Soupape d'injection de carburant, actionnée électromagnétiquement, selon la revendication 2, soupape caractérisée en ce que l'obturateur (18) est composé de deux parties (19, 20), dont l'une (19) est sensiblement hémisphérique et est vis-à-vis du siège et dont l'autre partie (20), disposée sur l'axe de cette première partie (19), entoure l'orifice (23) de la cavité (21).
4. Soupape d'injection de carburant, actionnée électromagnétiquement, selon la revendication 2 ou 3, soupape caractérisée en ce qu'un élément élastique (24) est logé entre l'extrémité (22), en forme de tampon, de la tige (12) et la partie (20) de l'obturateur (18) qui délimite l'orifice (23) de la cavité (21).
EP86113487A 1985-11-04 1986-10-01 Soupape électromagnétique d'injection de combustible Expired EP0222131B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86113487T ATE49033T1 (de) 1985-11-04 1986-10-01 Elektromagnetisch betaetigbares kraftstoffeinspritzventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3539057 1985-11-04
DE19853539057 DE3539057A1 (de) 1985-11-04 1985-11-04 Elektromagnetisch betaetigbares kraftstoffeinspritzventil

Publications (3)

Publication Number Publication Date
EP0222131A2 EP0222131A2 (fr) 1987-05-20
EP0222131A3 EP0222131A3 (en) 1987-11-11
EP0222131B1 true EP0222131B1 (fr) 1989-12-27

Family

ID=6285117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113487A Expired EP0222131B1 (fr) 1985-11-04 1986-10-01 Soupape électromagnétique d'injection de combustible

Country Status (6)

Country Link
US (1) US4759331A (fr)
EP (1) EP0222131B1 (fr)
JP (1) JPS62107267A (fr)
AT (1) ATE49033T1 (fr)
BR (1) BR8605409A (fr)
DE (2) DE3539057A1 (fr)

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
DE3843862A1 (de) * 1988-12-24 1990-06-28 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
US5217200A (en) * 1990-09-04 1993-06-08 South Bend Controls, Inc. Solenoid valve
AU653181B2 (en) * 1990-11-19 1994-09-22 Mic Co., Ltd. Valve and solenoid valve operated by very small force
GB9116078D0 (en) * 1991-07-25 1991-09-11 Lucas Ind Plc Pressure regulator
US5201299A (en) * 1991-12-11 1993-04-13 Southwest Research Institute Rotary gaseous fuel injector
GB2270738B (en) * 1992-08-25 1996-08-07 Israel State Fluid flow regulator
DE4302668A1 (de) * 1993-01-30 1994-08-04 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19532865A1 (de) * 1995-09-06 1997-03-13 Bosch Gmbh Robert Brennstoffeinspritzventil
US6334576B1 (en) 2000-06-30 2002-01-01 Siemens Automotive Corporation Fuel injector having a ball seat with multiple tip geometry
US6471181B2 (en) * 2001-01-11 2002-10-29 Vat Holding Ag Suspension of a valve plate of a vacuum valve
US7854256B2 (en) * 2001-07-26 2010-12-21 Dana Canada Corporation Plug bypass valves and heat exchangers
US9557749B2 (en) 2001-07-30 2017-01-31 Dana Canada Corporation Valves for bypass circuits in heat exchangers
US8960269B2 (en) 2001-07-30 2015-02-24 Dana Canada Corporation Plug bypass valve and heat exchanger
CA2459088C (fr) * 2004-02-27 2012-08-21 Dana Canada Corporation Electrovanne etanche
EP2038553B1 (fr) 2006-07-11 2020-07-08 Bernhard Frey Système cylindre-piston pour pompe hydraulique ou moteur hydraulique
KR20150020615A (ko) 2012-05-31 2015-02-26 다나 캐나다 코포레이션 통합 밸브를 가진 열교환기 조립체
CN102748179B (zh) * 2012-08-01 2016-03-09 袁辉 喷油器
WO2014053439A1 (fr) * 2012-10-05 2014-04-10 Nestec S.A. Clapet de non-retour, ensemble injection et machine de préparation de boissons
US10900557B2 (en) 2018-11-13 2021-01-26 Dana Canada Corporation Heat exchanger assembly with integrated valve with pressure relief feature for hot and cold fluids

Citations (1)

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Also Published As

Publication number Publication date
DE3667814D1 (de) 1990-02-01
BR8605409A (pt) 1987-08-11
EP0222131A3 (en) 1987-11-11
EP0222131A2 (fr) 1987-05-20
DE3539057A1 (de) 1987-05-14
JPS62107267A (ja) 1987-05-18
US4759331A (en) 1988-07-26
ATE49033T1 (de) 1990-01-15

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