EP2747095B1 - Électrovanne et procédé destiné à la fabrication d'une électrovanne - Google Patents

Électrovanne et procédé destiné à la fabrication d'une électrovanne Download PDF

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Publication number
EP2747095B1
EP2747095B1 EP13191453.3A EP13191453A EP2747095B1 EP 2747095 B1 EP2747095 B1 EP 2747095B1 EP 13191453 A EP13191453 A EP 13191453A EP 2747095 B1 EP2747095 B1 EP 2747095B1
Authority
EP
European Patent Office
Prior art keywords
pole ring
solenoid valve
carrier element
magnetic armature
air gap
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.)
Active
Application number
EP13191453.3A
Other languages
German (de)
English (en)
Other versions
EP2747095A3 (fr
EP2747095A2 (fr
Inventor
Michael Krause
Lars Olems
Matthias Horn
Andreas Rettich
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 EP2747095A2 publication Critical patent/EP2747095A2/fr
Publication of EP2747095A3 publication Critical patent/EP2747095A3/fr
Application granted granted Critical
Publication of EP2747095B1 publication Critical patent/EP2747095B1/fr
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Anticipated expiration legal-status Critical

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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
    • F02M51/0635—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
    • F02M51/0653—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 the valve being an elongated body, e.g. a needle valve
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for

Definitions

  • the invention relates to a solenoid valve according to the preamble of claim 1. Furthermore, the invention relates to a method for producing a solenoid valve according to the invention.
  • Such a solenoid valve is from the DE 10 2010 030 600 A1 known to the applicant.
  • the known solenoid valve has a magnet assembly with a magnet coil, which is arranged in a magnet core, which in turn is received in a magnet sleeve, which forms a carrier element for the magnet core.
  • a residual air gap disk for adjusting a residual air gap is arranged in the usual way between the magnetic core and the magnet armature.
  • the disadvantage here is that an additional component (residual air gap disc) is required to adjust the residual air gap, which increases the assembly and manufacturing costs.
  • residual air gap disc causes an increase in the number of contact surfaces, on which deposits can possibly accumulate, which can impair the function of the solenoid valve over the service life.
  • only certain defined residual air gaps that result from the thickness of the residual air gap discs can be set with such residual air gap discs.
  • the object of the invention is to develop a solenoid valve according to the preamble of claim 1 in such a way that an improved setting option of the residual air gap with a reduced number of components and an increased robustness of the solenoid valve, in particular with regard to deposits, is achieved.
  • This object is achieved according to the invention in a solenoid valve with the features of claim 1 in that the carrier element, in which the magnet assembly is arranged with its magnetic core, is designed as a stop element, which serves to fix or form the residual air gap.
  • residual air gap disc residual air gap disc
  • the use of a separate component is dispensed with, by virtue of a corresponding geometry or configuration of the carrier element, this acts in the manner of a residual air gap disc, that is to say that it has a contact surface for the magnet armature in its Forms solenoid facing end position.
  • the carrier element consists of an inner pole ring and an outer pole ring, which are arranged concentrically to one another and which are connected to one another with a non-magnetic intermediate element, such that the carrier element hydraulically on the side facing away from the magnet armature forms separate receiving space for the magnet assembly.
  • a design of the carrier element can be carried out advantageously in terms of production technology and, moreover, prevents the access of fuel to the area of the magnetic coil by separating the two spaces.
  • the intermediate element consists of solder material or plastic, and that the depressions are produced by a machining step, in particular by grinding.
  • the invention also includes a method for producing a solenoid valve according to the invention. It is provided that the residual air gap by removing material from the magnetic core and the Magnetic coil receiving carrier element or by positioning a ring integrally connected to the carrier element. Such a method has the advantage that a highly precise adjustment of the working air gap is made possible without the use of a separate component.
  • FIG. 1 A section of a solenoid valve 10 according to the invention is shown, as is preferably, but not limited, used as a component in a common rail injector 100 for injecting fuel into the combustion chamber of an internal combustion engine (not shown), in particular a self-igniting internal combustion engine.
  • the solenoid valve 10 is used to move up and down a valve member 11, which is only shown in its upper part area and which, when deenergized, is pressed against a sealing seat (not shown) by means of a compression spring 12.
  • a compression spring 12 When the solenoid valve 10 is energized, the valve member 11 lifts off the sealing seat. This open position of the valve member 11 is in the Fig. 1 shown.
  • the valve member 11 is actuated by means of a cross section hat-shaped magnet armature 13, which is pressed with a sleeve-shaped section 14 onto the circumference of the valve member 11.
  • the sleeve-shaped section 14 is surrounded by a flat or plate-shaped magnet armature section 15.
  • the magnet armature 13 interacts with a magnet assembly 18, which comprises a magnet coil 20 which is electrically contacted via plug connection lugs 19 and which is arranged or embedded in a magnet core 21.
  • the magnet core 21 is arranged or received together with the magnet coil 20 in a carrier element 25, which consists of a sleeve-shaped inner pole ring 26 and a sleeve-shaped outer pole ring 27.
  • the carrier element 25 is axially clamped to a valve housing body 24 by means of a union nut 23.
  • the two elements of the carrier element 25 consisting of magnetic material are connected to one another by means of a non-magnetic intermediate element 28.
  • the intermediate element 28 preferably consists of solder material and connects the obliquely arranged surfaces 29, 30 of the inner pole ring 26 and the outer pole ring 27 to one another.
  • the inner pole ring 26 arranged concentrically within the outer pole ring 27 receives the compression spring 12 in a stepped bore 32 designed as a through hole.
  • a stepped bore 32 Through the stepped bore 32 there is also a backflow of fuel to a fuel return port 31, for which purpose the magnet armature 13 has at least one, but preferably a plurality of equally spaced through holes 33 which hydraulically connect the stepped bore 32 to a magnet armature chamber 34.
  • the intermediate element 28 forms a receiving space 35 for the magnet assembly 18 from the carrier element 25 on the side opposite the magnet armature 13, which is sealed off from the fuel-carrying areas of the injector 100.
  • the carrier element 25 has an annular first region 37, against which the magnet armature 13 rests with its end face 38 in the end position shown.
  • the first region 37 thus forms a stop for the magnet armature 13.
  • a second region 39 is formed radially within the first region 37 and is designed in the form of a depression 40.
  • the recess 40 is in the in Fig. 1 and 2
  • the exemplary embodiment shown is formed on the end face of the inner pole ring 26 and the intermediate element 28 facing the magnet armature 13, and in a small partial area of the outer pole ring 27.
  • the geometrical dimensioning of the recess 40 determines the size of the residual air gap 36. According to the invention, it is provided that the recess 40 is formed or adjusted by a machining process, in particular by grinding.
  • FIG. 3 A modified exemplary embodiment of the invention is shown, in which the residual air gap 36 is formed by a recess 40a which is formed in the region of the outer pole ring 27, the intermediate element 28 and a small partial region of the inner pole ring 26.
  • annular recesses 40b, 40c are formed in the area of the inner pole ring 26 and the outer pole ring 27.
  • the annular, raised portion 41 of the intermediate element 28a forms the stop element for the magnet armature 13.
  • Fig. 5 is a versus Fig. 4 modified solenoid valve shown, in which the intermediate element 28b in the region of the outer pole ring 27 covers the end face 38 of the magnet armature 13.
  • the recess 40d is essentially formed only in the area of the inner pole ring 26.
  • the intermediate element 28b also the area of the inner pole ring 26 on the Magnet armature 13 facing end face completely covered (not shown).
  • the material of the intermediate element 28b forms the residual air gap 36 between the inner pole ring 26, the outer pole ring 27 and the magnet armature 13.
  • Last is in the Fig. 6 another, not according to the invention solenoid valve shown, in which the intermediate element 28, 28a, 28b according to the 1 to 5 is replaced by a metallic, non-magnetic ring 42.
  • the ring 42 is arranged in alignment with the magnet coil 20 and has a smaller width than the magnet coil 20. This means that the inner pole ring 26 and the outer pole ring 27, each with small surface sections 43, 44, are aligned with the end face of the magnet coil 20 are.
  • the ring 42 protrudes over the respective flat end faces of the inner pole ring 26 and the outer pole ring 27 on the side facing the magnet armature 13 via the inner pole ring 26 and the outer pole ring 27, the residual air gap 36 being determined by the dimension, around which the ring 42 protrudes beyond the inner pole ring 26 and the outer pole ring 27.
  • the ring 42 is fixedly and tightly connected to the inner pole ring 26 and the outer pole ring 27 by means of two weld seams 45, 46 arranged on the side of the magnet coil 20, each of which is annular.
  • the welding seams 45, 46 are preferably formed by a laser beam welding device.
  • the magnet armature 13 for example in a radially inner region, has a recess or step 47, so that the residual air gap 36 in the region of the step 47 is enlarged compared to a radially outer region of the magnet armature 13.
  • a surface structuring of the magnet armature 13 on the side facing the magnet coil 20 also in the FIGS 1 to 5 illustrated embodiments is conceivable.
  • Such a surface structuring can be provided in the form of a single depression or else in the form of several depressions. Also their shape is and Arrangement essentially depends on the respective application. Structuring the magnet armature 13 in this way makes it possible to additionally influence or adjust the function of the residual air gap 36.
  • the ring 42 can be connected to the inner pole ring 26 and the outer pole ring 27 in another way, for example by gluing, instead of by welding. It is also conceivable to design the ring 42 in the form of a sheet metal part, which is connected to the inner pole ring 26 and the outer pole ring 27, which are also formed as sheet metal parts, by crimping. Finally, it is also conceivable to design the inner pole ring 26 and the outer pole ring 27 in the context of powder metallurgical production. Such powder metallurgical training can take place in the sintering or in the MIM process and comprises the use of at least two powdered materials with different magnetic properties. With regard to the intermediate element 28, it is mentioned that it can also consist of plastic and is formed by injection molding onto the inner pole ring 26 and the outer pole ring 27.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (3)

  1. Électrovanne (10) comportant un sous-ensemble magnétique (18) qui comprend une bobine de solénoïde (20) et un noyau de solénoïde (21), dans lequel le sous-ensemble magnétique (18) est disposé dans un élément porteur (25) et présente une armature magnétique (13) disposée de manière mobile, dont une position finale est déterminée par un élément de butée conçu pour régler un entrefer résiduel (36) et sur lequel repose l'armature magnétique (13), dans lequel l'élément porteur (25) est constitué d'une bague polaire intérieure (26) et d'une bague polaire extérieure (27) disposées concentriquement l'une par rapport à l'autre et reliées entre elles par un élément intermédiaire non magnétique (28 ; 28a ; 28b), de telle manière que l'élément porteur (25) forme, sur la face qui est tournée à l'opposé de l'armature magnétique (13), un espace de réception (35) séparé de hydrauliquement de l'espace d'armature magnétique (34), pour le sous-ensemble magnétique (18),
    caractérisé en ce que
    l'élément porteur (25) forme l'élément de butée contre lequel l'armature magnétique (13) repose par une face frontale (38) à une position d'extrémité qui correspond à une position ouverte de l'armature magnétique (13), dans lequel l'élément porteur (25) comporte une première zone annulaire (37) sur la bague polaire extérieure (27) et une seconde zone (39) sur la bague polaire intérieure (26), disposée radialement à l'intérieur de la première zone (37), et
    soit un évidement (40) est formé sur l'élément porteur (25) sur la face frontale de la bague polaire intérieure (26) et de l'élément intermédiaire (28), qui est tournée vers l'armature magnétique (13),
    soit un évidement (40a) est formé dans la zone de la bague polaire extérieure (27) et de l'élément intermédiaire (28),
    de manière à ce que, dans sa position ouverte, l'armature magnétique (13) repose contre la bague polaire extérieure (27) ou la bague polaire intérieure (26).
  2. Électrovanne selon la revendication 1,
    caractérisée en ce que l'élément intermédiaire (28 ; 28a ; 28b) est constitué d'un matériau de brasage ou d'une matière plastique, et en ce que les évidements (40 ; 40a à 40d) sont réalisés par une étape d'usinage par découpe, en particulier par rectification.
  3. Procédé de fabrication d'une électrovanne (10) selon l'une des revendications 1 ou 2,
    caractérisé en ce que l'entrefer résiduel (36) est réglé par enlèvement de matériau sur un élément porteur (25) recevant le noyau magnétique (21) et la bobine magnétique (20) .
EP13191453.3A 2012-12-21 2013-11-04 Électrovanne et procédé destiné à la fabrication d'une électrovanne Active EP2747095B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012224240.6A DE102012224240A1 (de) 2012-12-21 2012-12-21 Magnetventil und Verfahren zum Herstellen eines Magnetventils

Publications (3)

Publication Number Publication Date
EP2747095A2 EP2747095A2 (fr) 2014-06-25
EP2747095A3 EP2747095A3 (fr) 2018-01-10
EP2747095B1 true EP2747095B1 (fr) 2020-01-08

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ID=49546273

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Application Number Title Priority Date Filing Date
EP13191453.3A Active EP2747095B1 (fr) 2012-12-21 2013-11-04 Électrovanne et procédé destiné à la fabrication d'une électrovanne

Country Status (2)

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EP (1) EP2747095B1 (fr)
DE (1) DE102012224240A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015212130A1 (de) * 2015-06-30 2017-01-05 Robert Bosch Gmbh Magnetbaugruppe und Kraftstoffinjektor mit einer Magnetbaugruppe
WO2018021123A1 (fr) * 2016-07-28 2018-02-01 株式会社デンソー Soupape d'injection de carburant
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
JP6583179B2 (ja) * 2016-07-28 2019-10-02 株式会社デンソー 燃料噴射弁
CA3184244A1 (fr) 2020-06-24 2021-12-30 Bernhard Spiegl Electrovanne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5918818A (en) * 1996-05-22 1999-07-06 Denso Corporation Electromagnetically actuated injection valve
JP3874698B2 (ja) * 2002-06-05 2007-01-31 株式会社デンソー 電磁弁用ソレノイド
JP5101456B2 (ja) * 2008-10-21 2012-12-19 三菱重工業株式会社 ソレノイド式電磁弁装置
DE102010030600A1 (de) 2010-06-28 2011-12-29 Robert Bosch Gmbh Minimierung des Ankerschließprellens durch ein Verzögerungsglied im Restluftspalt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2747095A3 (fr) 2018-01-10
DE102012224240A1 (de) 2014-06-26
EP2747095A2 (fr) 2014-06-25

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