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WO1999001661A1 - Vanne electromagnetique pour injecteurs de carburant - Google Patents

Vanne electromagnetique pour injecteurs de carburant Download PDF

Info

Publication number
WO1999001661A1
WO1999001661A1 PCT/JP1998/002805 JP9802805W WO9901661A1 WO 1999001661 A1 WO1999001661 A1 WO 1999001661A1 JP 9802805 W JP9802805 W JP 9802805W WO 9901661 A1 WO9901661 A1 WO 9901661A1
Authority
WO
WIPO (PCT)
Prior art keywords
core portion
solenoid valve
electromagnetic coil
armature
injection device
Prior art date
Application number
PCT/JP1998/002805
Other languages
English (en)
Japanese (ja)
Inventor
Yuji Furuya
Kenichi Iino
Original Assignee
Zexel Corporation
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 Zexel Corporation filed Critical Zexel Corporation
Publication of WO1999001661A1 publication Critical patent/WO1999001661A1/fr

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
    • 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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring

Definitions

  • the present invention relates to a solenoid valve for a fuel injection device, and more particularly to a solenoid valve for a fuel injection device capable of setting a large suction force.
  • a plunger type A disk-type solenoid that can set a larger suction area than the conventional solenoid is generally used. That is, for the same outer diameter, the disk-type solenoid can set a larger suction area, so that the generated suction force can be increased. Therefore, it is relatively easily used when high responsiveness or high-pressure operation is required.
  • Japanese Patent Application Laid-Open Nos. Hei 8-189347 and Hei 8-210207 are available.
  • FIG. 3 is a longitudinal sectional view of a solenoid valve 1 for a fuel injection device.
  • the solenoid valve 1 for a fuel injection device has a core 2, an electromagnetic coil 3, a seal member 4, and a disk-shaped solenoid valve. It has a Machiya 1 and a $ 21 valve 6.
  • the core part 2 is made of a magnetic material, and the inner and outer diameter sides of the electromagnetic coil 3 are formed.
  • the center of the fuel passage 7 and the return spring 8 can be installed.
  • the electromagnetic coil 3 has a bobbin 10 to which a terminal 9 for energization is attached, and a coil 11 for generating a magnetomotive force by energization, and a magnetic circuit can be formed in the core 2.
  • the sealing member 4 is made of a non-magnetic material, and the magnetic path between the core 2 and the armature 15 is secured by blocking the magnetic paths on the inner peripheral side and the outer peripheral side of the core 2.
  • a seal is provided to prevent fuel from entering the electromagnetic coil 3 from the fuel passage 7 side.
  • the armature 5 is made of a magnetic material, forms a magnetic circuit with the core 2, and can be attracted to the electromagnetic coil 3 (core 2).
  • the dollar valve 6 is attached to the armature 5 and allows fuel to be injected directly into the intake pipe or the cylinder from the injection hole 13 of the valve seat 12.
  • the electromagnetic coil 3 is inserted into the core 2 from the first mater 5 side (the lower side in the figure), and the sealing member 4 is pressed into the core 2 after press-fitting. Perform full circumference welding.
  • ⁇ is the amount of magnetic flux (wb)
  • ⁇ is the magnetic permeability
  • S is the area of the suction part (the part where the core part 2 faces the armature 5 and the sealing member 4 is excluded)
  • V is the leakage coefficient It is.
  • the suction force F of the solenoid valve 1 for fuel injection device is the amount of magnetic flux? It is determined from this.
  • the saturation magnetic flux density of a magnetic material is determined, the maximum value of the magnetic flux is proportional to the cross-sectional area of the magnetic path.
  • the larger the magnetic path cross-sectional area the larger the attractive force F can be.
  • the sealing member 4 since the sealing member 4 has greatly tightened the magnetic path cross-sectional area of the core portion 2 facing the armature 5, that is, the portion of the sealing member 4 is the electromagnetic coil 3. Does not contribute to the suction action of the armature 5 due to the above, the usable suction force F and the magnetic path area are limited, and the conventional magnetic solenoid valve 1 for a fuel injection device has a large magnetic path cross-sectional area. Therefore, there is a problem that it is difficult to increase the suction force F.
  • the solenoid valve 1 for a fuel injection device cannot respond to a demand for further improvement in responsiveness or an increase in operable fuel pressure. There is.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a solenoid valve for a fuel injection device capable of obtaining a larger suction force than before.
  • Another object of the present invention is to provide a solenoid valve for a fuel injection device capable of obtaining a larger magnetic path area than ever before.
  • Another object of the present invention is to provide a solenoid valve for a fuel injection device that can set a large suction force without increasing the outer diameter.
  • Another object of the present invention is to provide a solenoid valve for a fuel injection device which can respond to requests for improved responsiveness and increased operable fuel pressure with the same outer diameter.
  • Another object of the present invention is to provide a solenoid valve for a fuel injection device capable of increasing the attraction force of an electromagnetic coil and realizing high responsiveness and good operability in a high fuel pressure state in the same space as before. Make it an issue. That is, according to the present invention, the sealing member reduces the magnetic path area between the electromagnetic coil and the armature, and if the magnetic path area of this portion is increased, it is necessary to obtain the attractive force even with the same magnetomotive force.
  • the first aspect of the present invention focuses on the fact that the core is made of a magnetic material, an electromagnetic coil that can form a magnetic circuit in the core, and a disk-shaped key that can be attracted to the core.
  • a solenoid valve for a fuel injection device comprising: a needle and a needle valve attached to the armature and capable of injecting fuel from an injection hole, wherein the core part is formed by an inner core part and an outer part.
  • An opening space is formed by opening one end of the inner core portion and the outer core portion on the side of the armature in the axial direction in a ring shape, and forming an opening space portion.
  • the electromagnetic coil is provided, and a sealing member made of a non-magnetic material is further provided to close the open space.
  • the outer diameter of the bracket is smaller than that of the electromagnetic coil.
  • a second aspect of the present invention relates to a core portion made of a magnetic material, an electromagnetic coil capable of forming a magnetic circuit in the core portion, a disk-type mechanism that can be attracted to the core portion, and a magnetic member.
  • a solenoid valve for a fuel injection device comprising: a core valve having an inner core portion and an outer core portion, wherein the core portion comprises an inner core portion and an outer core portion.
  • One end of the inner core portion and the outer core portion on the side of the armature in the axial direction is opened in a ring shape to form an opening space, and the electromagnetic coil is provided in the opening space, and the opening is formed.
  • a seal member made of a non-magnetic material is provided on the inner peripheral side of the space, and the outer core is located on the outer peripheral side of the open space, thereby closing the open space. This is a solenoid valve for a fuel injection device.
  • the inner core portion and the outer core portion are formed from separate members, and the inner core portion is formed into a hollow cylindrical shape, and the outer core portion is formed on the inner peripheral surface thereof by the opening space portion.
  • Can have a hollow cylindrical shape with a step that can form You.
  • An elastic tongue for improving the sealing performance can be formed on the seal member.
  • the split configuration for dividing the core portion into the inner core portion and the outer core portion can be assembled as a solenoid valve, and the cross-sectional area of the nonmagnetic seal member is reduced. If possible, any configuration can be adopted.
  • the seal member prevents fuel from entering the electromagnetic coil portion, secures a magnetic path, and reduces the cross-sectional area of the seal member.
  • the magnetic path area between the coil and the armature can be increased by that much, and the attraction force of the armature by the electromagnetic coil can be increased.
  • the electromagnetic coil it is possible to increase the attractive force of the electromagnetic coil with the same outer diameter as the solenoid valve for the fuel injection device, and to increase the current or the number of turns of the coil to obtain the necessary and sufficient attractive force. It is possible to increase the boost value and the rise speed by reducing the size, and to reduce the size of the electromagnetic coil itself. That is, the magnetic flux density can be reduced in order to generate the same attractive force as the dog with the magnetic circuit area, and the electromagnetic coil can be downsized accordingly.
  • the outer diameter of the seal member is smaller than the outer diameter of the electromagnetic coil, so that a large amount of magnetic flux can be generated between the electromagnetic coil and the armature, and the armature formed by the electromagnetic coil can be used.
  • One suction force can be increased.
  • the magnetic flux also passes through this core portion, so that the armature can be sucked with a larger suction force.
  • the thickness of the seal member is set small and the inner and outer magnetic path cross-sectional areas are well-balanced, the area of the suction part will be the square of the diameter, so the magnetic path cross-sectional area will be more effective Can be increased.
  • leakage of magnetic flux that does not act on suction also increases. Therefore, there is an optimum value for the thickness of the sealing member.
  • the attraction force of the electromagnetic coil can be increased in the same space.
  • the setting force of the return spring can be increased, so that the adjustment range of the injection amount can be increased. It is possible to improve the performance.
  • FIG. 1 is a longitudinal sectional view of a solenoid valve 20 for a fuel injection device according to a first embodiment of the present invention.
  • FIG. 2 is a longitudinal sectional view showing an example in which a solenoid valve 31 for a fuel injection device according to a second embodiment of the present invention is incorporated in an actual fuel injection device 30.
  • FIG. 3 is a longitudinal sectional view of a conventional solenoid valve 1 for a fuel injection device.
  • FIG. 1 is a longitudinal sectional view of a solenoid valve 20 for a fuel injection device.
  • the solenoid valve 20 for a fuel injection device includes a core part 2 together with the electromagnetic coil 3, the armature 5 and the needle valve 6. And a seal member 22 corresponding to the seal member 4.
  • the core 21 has an inner core 23, a first outer core 24, and a second outer core 25 each having a hollow cylindrical shape.
  • the inner core portion 23, the first outer core portion 24, and the second outer core portion 25 are separate from each other, but they are both made of a magnetic material and pass a magnetic flux.
  • the seal member 22 is made of a non-magnetic material, and supports the bobbin 10 of the electromagnetic coil 3 together with the second outer core portion 25.
  • the first outer core portion 24 has a step portion 24A, and the step portion 24A on the opposite side between the inner core portion 23 and the first outer core portion 24.
  • An open space 26 is formed in a ring shape at one end facing the first mater 5 side, and the open space 26 is provided with the electromagnetic coil 3, the seal member 22, and the second outer core. Part 25 is provided.
  • the outer diameter of the core portion 21 (the inner core portion 23, the first outer core portion 24, and the second outer core portion 25) on the side of the armature 5 side is larger than the inner core portion 23.
  • a cylindrical seal member 22 having D is provided, and a second outer core portion 25 made of a ferromagnetic material is located outside the cylindrical seal member 22.
  • the outer diameter D of the sealing member 22 is smaller than the outer diameter C of the electromagnetic coil 3.
  • the lower end surface 22A of the seal member 22 on the armature 15 side is connected to the lower end surface 23A of the inner core portion 23 and the second outer core portion 25.
  • a slight gap 27 is provided by projecting slightly from the lower end surface 25 A to the armature 15 side, and a non-magnetic material is used when the armature 15 is sucked and lifted upward in the figure.
  • the armature 5 abuts only on the lower end surface 22A of a certain seal member 22, and the armature 5 easily moves downward in the figure by the urging force of the return spring 8 when the electromagnetic coil 3 is demagnetized. It is possible.
  • the seal member 22, the inner core portion 23, and the second outer core portion 25 are integrated into a single body.
  • the electromagnetic coil 3 is inserted into the inner core part 23 from above in the figure.
  • first outer core portion 24 is inserted from above, and after press-fitting into the inner core portion 23, the entire circumference is welded and fixed.
  • the magnetic path and the suction portion (the second outer core portion 25 Since the cross-sectional area of the inner core portion 23) can be set large, the suction force can be increased.
  • an increase in the attraction force F means a decrease in the boosted value, and the current value or the number of turns of the coil 11 of the electromagnetic coil 3 can be reduced.
  • FIG. 2 is a longitudinal sectional view showing an example in which a solenoid valve for a fuel injection device according to a second embodiment of the present invention is incorporated in an actual fuel injection device 30.
  • a connector 32 along with the fuel injector solenoid valve 31, a connector 32, an upper valve housing 33 (corresponding to the first outer core portion 24), a lower valve housing 34, and a fuel supply pipe 35 are provided.
  • the solenoid valve 31 for the fuel injection device includes a core 21 (an inner core 23, a first outer core 24, a second outer core 25), an electromagnetic coil 3, and a disk-shaped mater. Along with 5 and 21 valves 6, a seal member 37 corresponding to the seal members 4 and 22 is provided.
  • the sealing member 37 has a first elastic tongue 38 and a bobbin of the electromagnetic coil 3 at a radially pressed portion between the second outer core portion 25 and the second outer core portion 25.
  • a second elastic tongue piece 39 is formed at the axially press-contact portion between 10 and 10. The sealing performance has been improved.
  • the sealing member 37 is used similarly to the fuel injection device solenoid valve 20 described with reference to FIG. Since the fuel was sealed and the radial cross-sectional area of the sealing member 37 was reduced, the area of the magnetic path formed between the electromagnetic coil 3 and the armature 5 was increased accordingly. The suction power can be increased.

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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)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une vanne électromagnétique pour injecteurs de carburant, dans laquelle on peut obtenir une force d'attraction importante et une zone de chemin magnétique étendue pour une bobine d'électro-aimant (3), la réaction de ladite vanne électromagnétique pouvant être améliorée avec un diamètre extérieur inchangé. Cette vanne électromagnétique est conçue de sorte que l'accroissement de la zone de chemin magnétique, qui a été réduite par un élément d'étanchéité (22), de la partie située entre la bobine d'électro-aimant (3) et un induit (5), permet d'obtenir une force d'attraction requise même avec la même force magnétomotrice. Cette vanne électromagnétique est caractérisée en ce qu'une bobine d'électro-aimant (3) et un élément d'étanchéité (22) en matériau non magnétique sont placés dans un espace ouvert annulaire (26) sur une partie d'extrémité axiale, du côté de l'induit (5), d'un élément interne (23) et d'éléments externes (24, 25) d'un noyau (21), pour fermer l'espace ouvert (26), le diamètre extérieur (D) de l'élément d'étanchéité (22) étant inférieur à celui (C) de la bobine d'électro-aimant (3).
PCT/JP1998/002805 1997-07-03 1998-06-24 Vanne electromagnetique pour injecteurs de carburant WO1999001661A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9/192054 1997-07-03
JP19205497A JPH1144275A (ja) 1997-07-03 1997-07-03 燃料噴射装置用ソレノイドバルブ

Publications (1)

Publication Number Publication Date
WO1999001661A1 true WO1999001661A1 (fr) 1999-01-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1998/002805 WO1999001661A1 (fr) 1997-07-03 1998-06-24 Vanne electromagnetique pour injecteurs de carburant

Country Status (2)

Country Link
JP (1) JPH1144275A (fr)
WO (1) WO1999001661A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007014887A1 (fr) * 2005-08-04 2007-02-08 Robert Bosch Gmbh Soupape d'injection de carburant

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006509964A (ja) * 2002-12-13 2006-03-23 ローベルト　ボツシユ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング 噴射弁のための、衝突から解放された電磁式アクチュエータ
JP5822269B2 (ja) * 2011-11-11 2015-11-24 株式会社ケーヒン 電磁式燃料噴射弁
JP6186126B2 (ja) 2013-01-24 2017-08-23 日立オートモティブシステムズ株式会社 燃料噴射装置
JP6139191B2 (ja) 2013-03-14 2017-05-31 日立オートモティブシステムズ株式会社 電磁式燃料噴射弁
JP6583179B2 (ja) * 2016-07-28 2019-10-02 株式会社デンソー 燃料噴射弁
JP6520983B2 (ja) * 2016-07-28 2019-05-29 株式会社デンソー 燃料噴射弁、および燃料噴射弁の製造方法
WO2018021123A1 (fr) * 2016-07-28 2018-02-01 株式会社デンソー Soupape d'injection de carburant

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4812409U (fr) * 1971-06-24 1973-02-12
JPS5799265A (en) * 1980-12-11 1982-06-19 Aisan Ind Co Ltd Magnetic pole structure in electromagnetic fuel injection valve
JPH01125859U (fr) * 1988-02-23 1989-08-28
JPH064366U (ja) * 1991-02-28 1994-01-21 愛三工業株式会社 燃料噴射装置
JPH06503393A (ja) * 1990-12-12 1994-04-14 シーメンス アクチエンゲゼルシヤフト 燃料噴射器の終端キャップ
JPH07153624A (ja) * 1993-04-01 1995-06-16 Robert Bosch Gmbh 弁のための磁気回路を形成する方法
JPH07507373A (ja) * 1992-06-03 1995-08-10 シーメンス　オートモーティヴ　コーポレイション 流体用電磁操作弁の開弁応答を改良する手段
JPH0849624A (ja) * 1994-06-01 1996-02-20 Zexel Corp 電磁式燃料噴射弁の燃料侵入防止装置
JPH08210217A (ja) * 1995-02-03 1996-08-20 Zexel Corp 電磁式燃料噴射弁
JPH09310650A (ja) * 1996-05-22 1997-12-02 Denso Corp 燃料噴射弁
JPH09317596A (ja) * 1996-05-24 1997-12-09 Denso Corp 燃料噴射弁

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4812409U (fr) * 1971-06-24 1973-02-12
JPS5799265A (en) * 1980-12-11 1982-06-19 Aisan Ind Co Ltd Magnetic pole structure in electromagnetic fuel injection valve
JPH01125859U (fr) * 1988-02-23 1989-08-28
JPH06503393A (ja) * 1990-12-12 1994-04-14 シーメンス アクチエンゲゼルシヤフト 燃料噴射器の終端キャップ
JPH064366U (ja) * 1991-02-28 1994-01-21 愛三工業株式会社 燃料噴射装置
JPH07507373A (ja) * 1992-06-03 1995-08-10 シーメンス　オートモーティヴ　コーポレイション 流体用電磁操作弁の開弁応答を改良する手段
JPH07153624A (ja) * 1993-04-01 1995-06-16 Robert Bosch Gmbh 弁のための磁気回路を形成する方法
JPH0849624A (ja) * 1994-06-01 1996-02-20 Zexel Corp 電磁式燃料噴射弁の燃料侵入防止装置
JPH08210217A (ja) * 1995-02-03 1996-08-20 Zexel Corp 電磁式燃料噴射弁
JPH09310650A (ja) * 1996-05-22 1997-12-02 Denso Corp 燃料噴射弁
JPH09317596A (ja) * 1996-05-24 1997-12-09 Denso Corp 燃料噴射弁

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007014887A1 (fr) * 2005-08-04 2007-02-08 Robert Bosch Gmbh Soupape d'injection de carburant
US8770498B2 (en) 2005-08-04 2014-07-08 Robert Bosch Gmbh Fuel injector

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