EP0937200B1 - Soupape a commande electromagnetique - Google Patents

Soupape a commande electromagnetique Download PDF

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Publication number
EP0937200B1
EP0937200B1 EP98941251A EP98941251A EP0937200B1 EP 0937200 B1 EP0937200 B1 EP 0937200B1 EP 98941251 A EP98941251 A EP 98941251A EP 98941251 A EP98941251 A EP 98941251A EP 0937200 B1 EP0937200 B1 EP 0937200B1
Authority
EP
European Patent Office
Prior art keywords
core
armature
valve
return flow
flow 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 - Lifetime
Application number
EP98941251A
Other languages
German (de)
English (en)
Other versions
EP0937200A1 (fr
Inventor
Jürgen GRANER
Andreas Eichendorf
Thomas Sebastian
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 EP0937200A1 publication Critical patent/EP0937200A1/fr
Application granted granted Critical
Publication of EP0937200B1 publication Critical patent/EP0937200B1/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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • F02M2200/08—Fuel-injection apparatus having special means for influencing magnetic flux, e.g. for shielding or guiding magnetic flux

Definitions

  • the invention is based on an electromagnetically actuated valve, in particular a fuel injection valve for fuel injection systems of internal combustion engines, according to the genus of the main claim.
  • a Fuel injector in which a tubular core of one Magnetic coil is surrounded.
  • An anchor closes at the spray-side end of the core on, which is connected to a valve closing body with a valve seat interacts.
  • the valve seat is formed on a valve seat body, which in one tubular valve seat support is held.
  • the valve seat body also serves as Partial element for the magnetic reflux of the magnetic flux circuit.
  • valve seat support To encloses the valve seat support at its end opposite the spray end End the armature sleeve-like and directs the magnetic reflux radially to one Guide element, which connects the valve seat support to the core axially and thus the magnetic flux circuit closes.
  • a magnetic short circuit between the core and to avoid the valve seat support serving as the reflux body Valve seat carrier separated from the core by a non-magnetic intermediate part, which as metalleries valve inner tube is formed.
  • the magnetic flux therefore does not occur directly from the core into the valve seat support, but in an intended manner indirectly via the armature, so that the armature with electrical excitation of the Solenoid an axial force component to open the fuel injector is exercised.
  • the formation of the metal intermediate part as an additional turned part requires an additional manufacturing effort and an additional assembly effort.
  • the core the valve seat support and the non-magnetic intermediate part are separate turning parts manufactured and must be connected by two welds.
  • the Welding seams serve at the same time for the hydraulic sealing, so that an overflow of the Fuel is prevented in an annular space receiving the solenoid.
  • the quality of the weld seams must therefore meet and meet special requirements simplified welding process, e.g. B. a spot welding process can not Application come.
  • non-magnetic intermediate part can also Eddy currents occur that affect the efficiency of the electromagnetic actuation of the Affect the valve.
  • DE-PS 195 03 821 has already proposed the core and the To form the valve seat support as a one-piece component.
  • the magnetic separation between The core and the valve seat support are replaced by a magnetic throttle achieved.
  • the one-piece overall component forming the core and the valve seat support is included in the area of the throttle point with an extremely small wall thickness of, for example 0.2 mm. If the magnetic coil is excited magnetically, it will Range reached the saturation flux density, so that a restriction of the magnetic flux occurs and the magnetic exceeding the saturation flux density of the choke point Flow from the core passes through the armature into the valve seat support. Because of the low Wall thickness in the area of the magnetic choke point is however the mechanical one Stability of the overall component forming the core and the valve seat support is impaired, so assembly requires carefulness and precision.
  • the on the The throttling point of the saturation flux density basically stands for the magnetic one Actuation of the armature is not available and thus deteriorates the efficiency electromagnetic actuation.
  • the current flow in the solenoid coil is correspondingly too increase and the resulting thermal power loss must also be dissipated.
  • the electromagnetically actuated valve according to the invention with the characteristic Features of the main claim has the advantage that the magnetic Separation point between the core and the reflux body is realized in a simple manner, by the ferritic or ferromagnetic material of the core or Reflux body is mechanically clamped in the area of the separation point.
  • the Separation point have a relatively large wall thickness, so that mechanical instability does not occur at the magnetic separation point.
  • the mechanical bracing in the area of the separation point can be particularly advantageous Way generated by plastic deformation, the material in the area the separation point is under mechanical residual stress.
  • the plastic deformation can e.g. B. by a suitable pressing, mortising or stamping in an automatic Manufacturing processes can be realized.
  • the core and the reflux body are in one piece Form entire component and the magnetic separation point by a plastic To realize deformation on the one-piece overall component.
  • the assembly and Manufacturing costs are reduced to a minimum with this training. It can on the one-piece overall component in the area of the plastically deformed magnetic Separation point an annular recess surrounding the armature to be formed prevent the guide of the armature in the reflux body surrounding the armature is affected by the separation point.
  • the separation point can be a extend axially out between the core and the armature formed to ensure that the anchor is on the spray end of the core and not on the plastically deformed separation point and thus the valve stroke through the plastically deformed separation point is not impaired.
  • the core 3 has an axial longitudinal bore 4, in which a fluid, for. B. fuel flows. The direction of flow is indicated by arrow 5.
  • the core 3 has an end face 6 which has an upstream end face 7 of a Anchor 8 is opposite.
  • a gap 9 is formed in the core 3 and the upstream end face 7 of the armature 8.
  • valve closing body When the solenoid 2 is excited by an electric current, the upstream End face 7 of the armature 8 pulled to the downstream end face 6, so that the End face 7 of the armature 8 strikes the end face 6 of the core 3.
  • valve closing body lifts from one valve seat, also not shown, so that valve 1 opens.
  • the not shown Valve closing body can with a Anchor 8 are connected.
  • the solenoid 2 To actuate the valve 1, the solenoid 2 generates a magnetic flux which the core 3 enters the armature 8 via the gap 9 and radially out of the armature 8 Direction to a reflux body 10 surrounding the armature 8 passes.
  • the Reflux body 10 is in the embodiment shown in Fig. 1 still Separation point 12 to be described in more detail is formed in one piece with the core 3. Further is a guide element 11 is provided, which the magnetic reflux to the core 3rd returns.
  • the core 3, the armature 8, the reflux body 10 and the guide element 11 form a closed magnetic flux circuit.
  • the separation point 12 also has one Sealing function to prevent the fluid flowing in the longitudinal bore 4 of the core 3 from a Annular space 13, which houses the magnet coil 2, to be hydraulically sealed.
  • the fluid can e.g. B. on provided on the end face 7 of the armature 8 radial grooves a gap 14 radially surrounding the armature 8 to be guided in the direction of the Continue to flow valve seat.
  • the armature 8 itself can be directly axial have flowing flow bores or grooves.
  • the separation point 12 is according to the invention from the same ferritic or ferromagnetic material such as the core 3 and the reflux body 10 formed so that the separation point 12 is formed in one piece with the core 3 and / or the reflux body 10 can be without an additional intermediate part z. B. from one non-magnetic metal or plastic material is required. To one magnetic short circuit between the core 3 and the reflux body 10 too avoid, the separation point 12 may, however, no or only an insignificant magnetic flux from the core 3 directly to the reflux body 10 below Bypass the anchor 8 transferred.
  • the Core 3 and / or the reflux body 10 made of a ferritic or ferromagnetic Material exists, the permeability of the mechanical stress, under which the material stands, depends and that the core 3 and / or the reflux body 10 in one Border area between the core 3 and the reflux body 10 to form the magnetic separation point 12 is mechanically clamped.
  • the material of the Core 3 and / or the reflux body 10 in the region of the magnetic separation point 12 plastically deformed so that the material in the area of the separation point 12 under a mechanical residual stress, which is the permeability compared to the stress-free Condition of the material considerably reduced.
  • the magnetic induction B as a function of the magnetic field strength H is shown in FIG. 2 merely by way of example for a preferred material for the core 3, the reflux body 10 and the separation point 12 in order to illustrate the invention.
  • the functional relationship shown between the magnetic induction B and the magnetic field strength H relates to the commercially available ferritic magnetic material DMER 1F (K-M35FL). Of course, other ferritic or ferromagnetic materials are also suitable for carrying out the invention.
  • the magnetic material shown in diagram 30 was only finally annealed. According to diagram 31, however, the magnetic material was subjected to a mechanical stress of 120 N / mm 2 after the final annealing.
  • a comparison of the two diagrams shows that the permeability ⁇ for the magnetic material exposed to mechanical stress is relatively low in the range of a magnetic field strength H below 1.0 kA / m and only increases significantly in the range above 1.0 kA / m.
  • For the stress-free magnetic material on the other hand, in a range of the magnetic field strength H below 10 kA / m there is a significantly greater permeability ⁇ in comparison to the magnetic material exposed to mechanical stress.
  • the invention makes use of this to the extent that at the magnetic separation point 12 the material to reduce the permeability and thus to reduce the Flux density is mechanically braced for a given field strength.
  • this mechanical tension due to a plastic deformation of the material in the Area of the separation point 12, for. B. by caulking, pressing or by stamping achieved so that the material is under mechanical residual stress.
  • the advantage consists in particular in the fact that there is no separate component for the separation point 12 is required, but the separation point 12 from the same ferritic or Ferromagnetic material can be made, from which the core 3 and / or the reflux body 10.
  • the core 3 and the reflux body 10 can with the Separation point 12 can therefore be integrally connected to form a one-piece overall component.
  • the separation point 12 has a relatively high magnetic resistance and reduces the magnetic short circuit flow between the core 3 and the reflux body 10. At the same time, the separation point 12 ensures hydraulic sealing of the Magnetic coil 2 receiving annulus 13 compared to that of the invention Valve 1 flowing fluid.
  • Electromagnetically actuated valve 1 in the form of a fuel injection valve for Fuel injection systems from mixture-compressing, spark-ignited Internal combustion engines. Elements already described with reference to FIG. 1 are included matching reference numerals to facilitate the assignment.
  • the electromagnetically actuated valve 1 shown in FIG. 3 in the form of a Fuel injector has a surrounding by a solenoid 2, as Fuel inlet connector serving tubular core 3 as a so-called inner pole.
  • On Coil body 40 receives a winding of the magnet coil 2.
  • the core 3 is not like in the fuel injection valves of the prior art as a component that actually ends with a core end 41, but the core 3 runs over the magnetic separation point 12 continues in the downstream direction, so that a downstream of the coil body 40 arranged tubular connecting part, which in the further course as Reflux body 10 is referred to as a so-called outer pole in one piece with the core 3rd is formed, the resulting overall component being referred to as valve tube 42.
  • the valve tube 42 has one magnetic separation point 12.
  • a longitudinal bore 44 which is concentric with the Longitudinal valve axis 43 is formed.
  • a longitudinal bore 44 In the longitudinal bore 44 is a z.
  • tubular Valve needle 45 arranged at its downstream end 46 with a spherical valve closing body 47, on the circumference, for example, five Flattenings 48 are provided for the fuel to flow past, for example is connected by welding.
  • a return spring 49 or closing the injection valve is used for electromagnetic Circle with the magnet coil 2, the core 3 and the armature 8.
  • the armature 8 is with the Valve closing body 47 facing away from the end of the valve needle 45 by a weld connected and aligned to the core 3.
  • a cylindrical valve seat body 50 In the downstream core 3 opposite end of the reflux body 10 also serving as a valve seat support is in the Longitudinal bore 44 is a cylindrical valve seat body 50, one with the Has valve closing body 47 cooperating valve seat, tight by welding assembled.
  • a guide opening 51 of the Valve seat body 50 To guide the valve closing body 47 during the axial movement of the valve needle 45 with the armature 8 along the longitudinal valve axis 43, a guide opening 51 of the Valve seat body 50.
  • the spherical valve closing body 47 acts with the in Flow direction frustoconical valve seat of valve seat body 50 together.
  • the Valve seat body 50 On its end facing away from the valve closing body 47 is the Valve seat body 50 with, for example, a cup-shaped spray plate 52 firmly connected.
  • the cup-shaped spray perforated disk 52 has at least one, for example four spray openings 53 formed by eroding or stamping.
  • the armature 8 connected to the valve needle 45 during the Axial movement is the non-magnetic in the known fuel injection valves
  • the extremely precise and highly accurate z. B. on precision lathes be made to achieve a small leadership game. Because with that no intermediate part is necessary, it makes sense to on the outer circumference of the armature 8 at least one guide surface, the z. B. by turning is made to provide.
  • the guide surface can, for. B. as a circulating continuous guide ring or as several on the circumference with a distance from each other trained guide surfaces.
  • the insertion depth of the valve seat body 50 with the cup-shaped spray perforated disk 52 determines the size of the stroke of the valve needle 45.
  • the one end position is the Valve needle 45 when the solenoid coil 2 is not energized by the contact of the valve closing body 47 fixed to the valve seat of the valve seat body 50 while the other end position the valve needle 45 when the magnet coil 2 is excited by the contact of the armature 8 on Core end 41 results.
  • the magnet coil 2 is of at least one, for example as a bracket trained guide element 54 surround the solenoid 2 in the circumferential direction at least partially surrounds and with one end of the core 3 and its at the other end against the reflux body 10 serving as valve seat support and with this z. B. can be connected by welding, soldering or gluing.
  • the fuel injector is largely with a plastic extrusion 55 enclosed, starting from the core 3 in the axial direction via the magnet coil 2 and the at least one guide element 54 extends to the reflux body 10, the Guide element 54 is completely covered axially and in the circumferential direction.
  • This Plastic encapsulation 55 belongs, for example, to an electrical injection molded onto it Connector 56.
  • the one-piece, in the core 3, the magnetic separation point 12th and the reflux body 10 dividing valve tube 42 extends completely over the entire length of the fuel injector.
  • Fig. 4 shows the detail IV in Fig. 3 in an enlarged view.
  • Fig. 4 are in particular the armature 8, the core 3 and the via the separation point 12 of the core 3 separate reflux body 10 can be seen.
  • Fig. 4 The upstream end face 7 of the armature 8 and the downstream end face 6 of the core 3 spaced apart by the gap 9.
  • the separation point 12 is through a plastic deformation to generate the mechanical residual stress shaped like a bead. Between the separation point 12 and the an annular recess 60 is provided upstream end of the armature 8 z. B. by the deformation tool, e.g. an embossing stamp or an embossing die, can be trained.
  • the annular recess 60 extends axially Direction against the spray direction of the fuel injector over the between the core 3 and the armature 8 formed gap 9 also.

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 (7)

  1. Soupape à commande électromagnétique (1), notamment injecteur de carburant pour des installations d'injection de carburant équipant des moteurs à combustion interne, comprenant
    un noyau (3) entouré d'une bobine électromagnétique (2), un induit (8) au voisinage du noyau (3) pour actionner un obturateur de soupape (47) coopérant avec un siège de soupape, et un organe de retour de flux (10) entourant l'induit (8), cet organe de retour de flux étant séparé magnétiquement du noyau (3) par une zone de séparation (12),
    caractérisée en ce que
    le noyau (3) et/ou le corps de retour de flux (10) sont en une matière ferritique ou ferromagnétique dont la perméabilité dépend de la tension mécanique à laquelle est soumis le matériau, et
    le noyau (3) et/ou le corps de retour de flux (10) sont serrés mécaniquement dans une zone limite entre le noyau (3) et le corps de retour de flux (10) pour former la zone de séparation (12).
  2. Soupape selon la revendication 1,
    caractérisée en ce que
    le matériau du noyau (3) et/ou celui du corps de retour de flux (10) sont soumis à une tension mécanique propre du fait de la déformation plastique au niveau de la zone de séparation magnétique (12).
  3. Soupape selon l'une quelconque des revendications 1 ou 2,
    caractérisée en ce que
    le noyau (3) et le corps de retour de flux (10) sont réalisés sous la forme d'un composant d'une seule pièce (42) dans laquelle la zone de séparation (12) est réalisée par déformation plastique.
  4. Soupape selon la revendication 3,
    caractérisée en ce que
    le composant d'une seule pièce (42), qui constitue le noyau (3) et le corps de retour de flux (10), entoure l'induit (8) à son extrémité adjacente au noyau (3) pour réaliser radialement, entre la zone de séparation (12) déformée plastiquement et l'induit (8), une cavité annulaire (60).
  5. Soupape selon la revendication 4,
    caractérisée en ce que
    la cavité annulaire (60) s'étend dans la direction axiale au-delà d'un entrefer (9) réalisé entre le noyau (3) et l'induit (8).
  6. Soupape selon l'une quelconque des revendications 1 à 5,
    caractérisée en ce que
    le corps de retour de flux (10) qui entoure l'induit (8) est de forme tubulaire et sert en même temps de support de siège de soupape portant un organe formant siège de soupape (50) sur lequel est réalisé le siège de soupape.
  7. Soupape selon l'une quelconque des revendications 1 à 6,
    caractérisée en ce que
    le corps de retour de flux (10) et le noyau (3) sont reliés par au moins un élément conducteur (54) entourant la bobine magnétique (2) et le noyau (3), l'induit (8), le corps de retour de flux (10) et l'élément conducteur (54) constituent un circuit de flux magnétique fermé.
EP98941251A 1997-09-09 1998-06-30 Soupape a commande electromagnetique Expired - Lifetime EP0937200B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19739324 1997-09-09
DE19739324A DE19739324A1 (de) 1997-09-09 1997-09-09 Elektromagnetisch betätigbares Ventil
PCT/DE1998/001788 WO1999013211A1 (fr) 1997-09-09 1998-06-30 Soupape a commande electromagnetique

Publications (2)

Publication Number Publication Date
EP0937200A1 EP0937200A1 (fr) 1999-08-25
EP0937200B1 true EP0937200B1 (fr) 2002-04-10

Family

ID=7841614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98941251A Expired - Lifetime EP0937200B1 (fr) 1997-09-09 1998-06-30 Soupape a commande electromagnetique

Country Status (6)

Country Link
US (1) US6042082A (fr)
EP (1) EP0937200B1 (fr)
JP (1) JP2001505277A (fr)
DE (2) DE19739324A1 (fr)
ES (1) ES2175755T3 (fr)
WO (1) WO1999013211A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19808067A1 (de) * 1998-02-26 1999-09-02 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
JP2001263521A (ja) * 2000-03-17 2001-09-26 Denso Corp 電磁駆動装置およびそれを用いた流体制御弁と電磁駆動装置の製造方法
US6434822B1 (en) * 2000-09-13 2002-08-20 Delphi Technologies, Inc. Method of fuel injector assembly
JP4045209B2 (ja) * 2003-06-20 2008-02-13 株式会社日立製作所 電磁式燃料噴射弁
JP3819907B2 (ja) * 2004-02-27 2006-09-13 株式会社ケーヒン 電磁式燃料噴射弁およびその製造方法
DE102004037541B4 (de) * 2004-08-03 2016-12-29 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004047041B4 (de) * 2004-09-28 2017-06-14 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4535033B2 (ja) 2005-10-14 2010-09-01 株式会社デンソー 減圧弁および燃料噴射装置
DE102011084704A1 (de) 2011-10-18 2013-04-18 Robert Bosch Gmbh Ausrichtelement für ein Einspritzventil sowie Verfahren zur Herstellung eines Einspritzventils
JP6265009B2 (ja) * 2014-03-31 2018-01-24 アイシン・エィ・ダブリュ株式会社 電磁駆動装置および電磁弁
JP2017527106A (ja) * 2014-07-10 2017-09-14 ボーグワーナー インコーポレーテッド ソレノイド曲線形状化のための曲線形シャント
WO2017041979A2 (fr) * 2015-09-11 2017-03-16 Continental Automotive Gmbh Soupape d'injection de fluide
WO2018128149A1 (fr) * 2017-01-05 2018-07-12 Tdk株式会社 Noyau et réacteur, limiteur de courant, actionneur électromagnétique et moteur utilisant ledit noyau

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3925212C2 (de) * 1989-07-29 1997-03-27 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE4003227C1 (en) * 1990-02-03 1991-01-03 Robert Bosch Gmbh, 7000 Stuttgart, De EM fuel injection valve for IC engine - has two overlapping parts welded together as narrowed section of one part
US5494225A (en) * 1994-08-18 1996-02-27 Siemens Automotive Corporation Shell component to protect injector from corrosion
DE19503821A1 (de) 1995-02-06 1996-08-08 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE19503820C2 (de) * 1995-02-06 2003-10-16 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil und Verfahren zur Herstellung einer Führung an einem Ventil

Also Published As

Publication number Publication date
JP2001505277A (ja) 2001-04-17
EP0937200A1 (fr) 1999-08-25
DE59803722D1 (de) 2002-05-16
WO1999013211A1 (fr) 1999-03-18
DE19739324A1 (de) 1999-03-11
ES2175755T3 (es) 2002-11-16
US6042082A (en) 2000-03-28

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