EP0871822B1 - Valve à commande électromagnétique - Google Patents

Valve à commande électromagnétique Download PDF

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Publication number
EP0871822B1
EP0871822B1 EP97924897A EP97924897A EP0871822B1 EP 0871822 B1 EP0871822 B1 EP 0871822B1 EP 97924897 A EP97924897 A EP 97924897A EP 97924897 A EP97924897 A EP 97924897A EP 0871822 B1 EP0871822 B1 EP 0871822B1
Authority
EP
European Patent Office
Prior art keywords
valve
connecting part
valve seat
middle region
valve according
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
EP97924897A
Other languages
German (de)
English (en)
Other versions
EP0871822A1 (fr
Inventor
Ferdinand Reiter
Hubert Stier
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 EP0871822A1 publication Critical patent/EP0871822A1/fr
Application granted granted Critical
Publication of EP0871822B1 publication Critical patent/EP0871822B1/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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to an electromagnetically operable valve according to the preamble of claim 1.
  • a valve needle for an electromagnetically operable valve consisting of an armature, a valve closure member and the armature with the z. B.
  • spherical valve closure member connecting sleeve-shaped connecting part with fixed connections of the individual needle components z. B. are achieved by laser welding.
  • the armature engages around the connecting part completely radially and at least partially axially, since the connecting part is fixed in a continuous longitudinal opening of the armature.
  • the connecting part itself also has a continuous inner longitudinal opening in which fuel can flow in the direction of the valve closure member, which then exits near the valve closure member through introduced in the wall of the connecting part, radially extending transverse openings.
  • the tubular connecting part has over its entire axial length a constant diameter, so that viewed in the axial direction throughout circular cross section is present, which is interrupted only by a narrow longitudinal slot and transverse openings.
  • an electromagnetically operable valve which has a valve needle, which is also composed of an armature, a valve closure member and a connecting both needle components connecting part.
  • the connecting part is made of semi-finished profile and allows fluid flow only outside the profile.
  • the profile arms of the profiled connecting part are designed so that there are cross, Y, triangular, circular section and other cross sections. Due to the massive training of the semi-finished profile made of connecting parts, the mass of the valve needle is relatively large.
  • the electromagnetically actuated valve according to the invention with the features of claim 1 has the advantage that in a simple manner cost-effective reduction of the mass of the valve is achieved with respect to valves of the same size.
  • This is inventively achieved in that a connecting part of a valve needle is used as a punching-bending part made of sheet metal over at least 75% of the total length of its axial extent has an open, in cross-section eg deviating from a circular shape profile having a smaller outer circumference than the perimeters of the annular profile of the ends of the connecting part or profiles of comparable known connecting parts or valve pins.
  • Another advantage of the valve needle according to the invention lies in the ease of manufacture by bending and stamping processes.
  • the formation of the profiled connection part can lead to a mass reduction of about 30% compared to continuously tubular formed with annular cross-section connecting parts or an even greater mass reduction compared to massively executed valve needles.
  • This mass saving is particularly important for elongated valves where the valve's injection point is far superior.
  • the Abspritz Scheme ranges so z. B. in the intake passage of an internal combustion engine clearly.
  • a wall wetting of the intake pipe can be easily avoided by a possible targeted spraying on one or more intake valves, whereby the exhaust emission of the internal combustion engine and the fuel consumption can be reduced. Since the wear forces on the valve seat of the valve behave proportionally to the mass of the valve needle, reducing the mass can significantly reduce the wear on the valve seat.
  • Particularly suitable profiles for the connecting part of the valve needle have U-, C-, V- or clasp-shaped cross sections. These geometries of the connecting parts have a high resistance to bending and buckling.
  • valve seat carrier is therefore a thin-walled non-magnetic sleeve, in the inner longitudinal opening, the valve needle moves axially.
  • FIG. 2 shows a section through the valve needle and the valve seat carrier along the line II-II in Figure 1 and Figures 3a to 3d embodiments of profiles of the connecting parts with U, C, V and clasp-shaped cross-sections.
  • the electromagnetically operable valve in the form of an injection valve for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines, for example, shown in FIG. 1 has a tubular core 2, which is surrounded by a magnetic coil 1 and serves as a fuel inlet nozzle, as a so-called inner pole.
  • a bobbin 3 receives a winding of the magnetic coil 1 and allows in conjunction with the core 2 a particularly compact design of the injection valve in the field of solenoid coil 1.
  • the core 2 is stepped and has in the axial extent of the magnetic coil 1 a paragraph 5, as Stop surface for an anchor 6 is used.
  • the core 2 extends over the Paragraph 5 also in the downstream direction, so that a downstream of the solenoid assembly arranged sleeve-shaped valve seat carrier 10 need not be connected in the region of the paragraph 5 with the core 2.
  • the core 2 has a likewise tubular, but a much thinner wall than the other wall thickness of the core 2 having magnetic throttle 13.
  • a lower core end 14 which in turn has a much greater wall thickness as the throttle point 13 has.
  • valve seat carrier 10 In the serving as a connecting part and a tubular and thin-walled sleeve performing valve seat carrier 10 extends a longitudinal opening 18, which is also formed concentrically to the valve longitudinal axis 15.
  • the valve seat carrier 10 With the lower core end 14 of Kerns 2, the valve seat carrier 10 is sealed, for example, by welding and surrounds it with an upper sleeve portion 24 a portion of the core end 14 axially.
  • the z. B. nonmagnetic steel valve seat carrier 10 encloses next to the core end 14 and at its opposite end a valve seat body 29 and a spray hole attached to it 34.
  • the valve seat carrier 10 is elongated, wherein the valve seat carrier 10 even half or more of the entire axial extension length of Can make injection valve.
  • the injection point of the injection valve is far superior. In conventional installation positions of injection valves in internal combustion engines, this means that the injection valve extends with its downstream end and thus with its metering and Abspritz Scheme significantly into the intake manifold. As a result, wall wetting of the intake pipe can be largely avoided by targeted spraying on one or more intake valves and as a result, the exhaust emission of the internal combustion engine can be reduced.
  • the actuation of the injection valve takes place in a known manner electromagnetically.
  • the electromagnetic circuit with the solenoid coil 1, the core 2 and the armature 6.
  • the armature 6 is with the valve closing body 21 remote from the end 40 of the connecting part 19 'connected by a weld and aligned with the core 2.
  • the armature 6 wraps around the end 40 of the connecting part 19 'at least partially.
  • the core 2 opposite end of the valve seat carrier 10 is in the longitudinal opening 18 of the z.
  • cylindrical valve seat body 29 having a fixed valve seat 30, mounted by welding tight.
  • valve closing body 21 To guide the valve closing body 21 during the axial movement of the valve needle 19 with the armature 6 along the valve longitudinal axis 15 serves a guide opening 32 of the valve seat body 29.
  • the armature 6 is guided even during the axial movement in the core 2, especially in the region of the magnetic throttle 13.
  • At the outer periphery of the armature 6 can z. B. be provided a specially trained guide surface.
  • the spherical valve closing body 21 cooperates with the valve seat 30 of the valve seat body 29, which tapers in the direction of the flow in the direction of flow.
  • cup-shaped spray perforated disk 34 At its the valve closing body 21 facing away from the valve seat body 29 with the z. B.
  • the spray perforated disk 34 has at least one, for example, four ejection openings 35 formed by eroding, punching or etching. A retaining edge of the spray perforated disk 34 is conically bent outwards, so that it bears against the inner wall of the valve seat support 10 defined by the longitudinal opening 18, wherein a radial Pressing is present.
  • the spray perforated disk 34 is connected to the wall of the valve seat carrier 10, for example, by a circumferential and dense z. B. connected by means of a laser weld. An immediate flow of the fuel into an intake line of the internal combustion engine outside of the injection openings 35 is avoided by the weld seams on the spray perforated disk 34.
  • the depth of insertion of the valve seat body 29 with the spray perforated disk 34 into the valve seat carrier 10 determines the size of the stroke of the valve needle 19.
  • the one end position of the valve needle 19 is not energized Solenoid 1 fixed by the system of the valve closing body 21 on the valve seat 30, while the other end position of the valve needle 19 results in energized solenoid coil 1 by the plant of the armature 6 on the heel 5 of the core 2.
  • the magnetic coil 1 is surrounded by at least one, for example, designed as a bracket and serving as ferromagnetic element guide element 45 which surrounds the magnetic coil 1 in the circumferential direction at least partially and with its two ends to the core 2 upstream and downstream of the throttle body 13 and with this z , B. is connected by welding, soldering or gluing.
  • the electromagnetically actuated valve is largely enclosed outside the valve seat carrier 10 with a plastic extrusion coating 50, which extends from the core 2 in the axial direction via the magnetic coil 1 and the at least one guide element 45 to the valve seat carrier 10, wherein the at least one guide element 45 completely axially and is covered in the circumferential direction.
  • Kunststoffumspritzung 50 includes, for example, a mitangespritzter electrical connector 52. About the electrical connector 52, the electrical contacting of the magnetic coil 1 and thus their excitation.
  • valve seat carrier 10 Through the use of the relatively cheap sleeve for the valve seat carrier 10, it is possible to dispense with conventional in injection valves rotary parts, which are due to their larger outer diameter voluminous and more expensive to manufacture than the valve seat carrier 10. This is particularly advantageous if, as in the case of the present valve, the discharge point should be far advanced / upstream since the material savings compared to known solid valve seat carriers or nozzle holders are considerable.
  • the thin-walled valve seat carrier 10 is For example, have been formed by deep drawing, as a non-magnetic material, for. As a stainless steel CrNi steel is used.
  • the elongated valve seat carrier 10 has near the lower end 55 of the plastic extrusion coating 50, formed by folding, outwardly peripheral annular bead 56.
  • annular groove 57 A arranged in the annular groove 57 sealing ring 58 serves to seal between the circumference of the injector and a valve receptacle, not shown, for example Intake line of the internal combustion engine.
  • the Abspritzddling the injector downstream of the valve closing body 21 is z. B. far further from the solenoid coil 1 and the stopper area of the core 2 and armature 6 as an inlet-side end 59 of the core 2 and the entire injection valve of the solenoid coil 1 and the abovementioned abutment region.
  • the valve needle 19 has a considerable length compared to the entire valve length, the z. B. extends over more than half the valve length and should be carried out by suitable measures particularly light, but still stable and inexpensive.
  • the connecting part 19 'z. B made of austenitic steel.
  • the two axial ends 20 and 40 of the connecting part 19 ' are designed to facilitate attachment of the armature 6 and the valve closing body 21 to them in a known manner tubular, so that in section results in an annular profile, which is interrupted for example only by a narrow axially extending slot 60.
  • the connecting part 19 ' resembles a known from DE 40 08 675 A valve needle. Over the greater part of the extension length of the connecting part 19 ', however, another profile is provided.
  • a central, at least 75% with respect to the total length range 61 of the connecting part 19 ' has an embossed profile whose cross-section (extent, dimension) is significantly smaller than the cross-sections of the ends 20 and 40. This is achieved in that in the area 61 of outer circumference of the connecting part 19 'relative to the outer periphery of the ends 20 and 40 is reduced.
  • the outer circumference is to be understood as meaning only one contour line which runs away from the valve longitudinal axis 15 and thus does not encompass the respective inner wall facing the valve longitudinal axis 15.
  • FIG. 2 shows, as a sectional illustration through the valve seat carrier 10 and the connecting part 19 'along the line II-II in FIG. 1, an example of a possible profile of the connecting part 19'.
  • the profiles according to the invention of the connecting part 19 ' are characterized in that they are open on one side and thus have U-, V-, C-shaped or possessed by these slightly modified or modified forms cross-sections.
  • the connecting parts 19 ' may have cross sections according to FIGS. 3a to 3d.
  • connecting parts 19 ' are stamped and bent parts, which are formed from originally flat sheet metal parts.
  • both the ends 20 and 40 with their circular cross-sections and the central regions 61 with their special cross-sections can be formed.
  • the final contour of the connecting part 19 ' is achieved by bending and stamping processes.
  • a mass reduction of about 30% is possible.
  • the wear forces on the valve seat 30 can be reduced in an advantageous manner by the lower mass of the valve needle 19.

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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)
  • Magnetically Actuated Valves (AREA)

Claims (9)

  1. Soupape à commande électromagnétique, notamment injecteur de carburant pour des systèmes d'injection de carburant de moteurs à combustion interne, dotée d'un noyau (2) entouré par une bobine électromagnétique (1), d'un induit (6) tourné vers le noyau (2), d'un siège de soupape fixe (30) avec lequel collabore une aiguille de soupape (19) composée de l'induit (6), d'une pièce de liaison (19') et d'un obturateur de soupape (2·1), la pièce de liaison (19') étant une pièce de pliage et d'estampage en tôle dont les deux extrémités (20, 40) sur lesquelles l'induit (6) et l'obturateur de soupape (21) sont reliés fixement à la pièce de liaison (19') présentent une section transversale annulaire en grande partie périphérique, dans laquelle
    entre les deux extrémités (20, 40) une zone moyenne (61) de la pièce de liaison (19') possède un profil ouvert présentant une périphérie extérieure plus petite que la périphérie extérieure de la section transversale annulaire des deux extrémités (20, 40),
    caractérisée en ce que
    la zone moyenne (61) correspond au moins à 75 % de la longueur totale de la pièce de liaison (19').
  2. Soupape selon la revendication 1,
    caractérisée en ce que
    la zone moyenne (61) de la pièce de liaison (19') possède un profil en U.
  3. Soupape selon la revendication 1,
    caractérisée en ce que
    la zone moyenne (61) de la pièce de liaison (19') possède un profil en C.
  4. Soupape selon la revendication 1,
    caractérisée en ce que
    la zone moyenne (61) de la pièce de liaison (19') possède un profil en V.
  5. Soupape selon la revendication 1,
    caractérisée en ce que
    la zone moyenne (61) de la pièce de liaison (19') possède un profil en forme de griffe, de patte, de crochet ou d'agrafe.
  6. Soupape selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'aiguille de soupape (19) possède une longueur représentant plus de la moitié de la longueur totale de la soupape.
  7. Soupape selon la revendication 1,
    caractérisée en ce que
    le point d'éjection de la soupape en aval de l'obturateur de soupape (21) est plus éloigné de la bobine électromagnétique (1) qu'une extrémité (59) de la soupape côté admission.
  8. Soupape selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la pièce de liaison (19') peut être fabriquée par des procédés de pliage et de gaufrage.
  9. Soupape selon la revendication 1,
    caractérisée en ce qu'
    un support de siège de soupape (10) logeant le siège de soupape fixe (30) est un manchon à paroi fine.
EP97924897A 1996-08-09 1997-05-16 Valve à commande électromagnétique Expired - Lifetime EP0871822B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19632196 1996-08-09
DE19632196A DE19632196B4 (de) 1996-08-09 1996-08-09 Elektromagnetisch betätigbares Ventil
PCT/DE1997/001006 WO1998006939A1 (fr) 1996-08-09 1997-05-16 Valve a commande electronique

Publications (2)

Publication Number Publication Date
EP0871822A1 EP0871822A1 (fr) 1998-10-21
EP0871822B1 true EP0871822B1 (fr) 2006-08-23

Family

ID=7802247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97924897A Expired - Lifetime EP0871822B1 (fr) 1996-08-09 1997-05-16 Valve à commande électromagnétique

Country Status (8)

Country Link
US (1) US5975436A (fr)
EP (1) EP0871822B1 (fr)
JP (1) JP2000500218A (fr)
KR (1) KR19990064075A (fr)
CN (1) CN1077652C (fr)
DE (2) DE19632196B4 (fr)
RU (1) RU2177075C2 (fr)
WO (1) WO1998006939A1 (fr)

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US6547154B2 (en) 2000-12-29 2003-04-15 Siemens Automotive Corporation Modular fuel injector having a terminal connector interconnecting an electromagnetic actuator with a pre-bent electrical terminal
US6655609B2 (en) * 2000-12-29 2003-12-02 Siemens Automotive Corporation Modular fuel injector having a low mass, high efficiency electromagnetic actuator and having an integral filter and o-ring retainer assembly
US6508417B2 (en) 2000-12-29 2003-01-21 Siemens Automotive Corporation Modular fuel injector having a snap-on orifice disk retainer and having a lift set sleeve
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US6511003B2 (en) 2000-12-29 2003-01-28 Siemens Automotive Corporation Modular fuel injector having an integral or interchangeable inlet tube and having a terminal connector interconnecting an electromagnetic actuator with an electrical terminal
US6811091B2 (en) 2000-12-29 2004-11-02 Siemens Automotive Corporation Modular fuel injector having an integral filter and dynamic adjustment assembly
US7093362B2 (en) 2001-03-30 2006-08-22 Siemens Vdo Automotive Corporation Method of connecting components of a modular fuel injector
US6687997B2 (en) 2001-03-30 2004-02-10 Siemens Automotive Corporation Method of fabricating and testing a modular fuel injector
US6904668B2 (en) 2001-03-30 2005-06-14 Siemens Vdo Automotive Corp. Method of manufacturing a modular fuel injector
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US6676046B2 (en) 2001-08-06 2004-01-13 Siemens Automotive Corporation Closure member with armature strap
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JP5427810B2 (ja) * 2011-02-28 2014-02-26 日立オートモティブシステムズ株式会社 配管と通路部品との接続方法及び燃料噴射弁
DE102011075408B4 (de) * 2011-05-06 2018-08-02 Robert Bosch Gmbh Ventil zum Zumessen eines strömenden Mediums
JP6061074B2 (ja) * 2012-09-28 2017-01-18 株式会社ケーヒン 燃料噴射弁
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JP6488134B2 (ja) * 2015-01-26 2019-03-20 日立オートモティブシステムズ株式会社 燃料噴射弁
CN105065095A (zh) * 2015-08-21 2015-11-18 南岳电控(衡阳)工业技术有限公司 一种尿素直喷喷嘴

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Also Published As

Publication number Publication date
JP2000500218A (ja) 2000-01-11
US5975436A (en) 1999-11-02
DE59712713D1 (de) 2006-10-05
KR19990064075A (ko) 1999-07-26
CN1077652C (zh) 2002-01-09
WO1998006939A1 (fr) 1998-02-19
DE19632196A1 (de) 1998-02-12
CN1198799A (zh) 1998-11-11
DE19632196B4 (de) 2004-11-04
EP0871822A1 (fr) 1998-10-21
RU2177075C2 (ru) 2001-12-20

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