EP2747095A2 - 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
EP2747095A2
EP2747095A2 EP13191453.3A EP13191453A EP2747095A2 EP 2747095 A2 EP2747095 A2 EP 2747095A2 EP 13191453 A EP13191453 A EP 13191453A EP 2747095 A2 EP2747095 A2 EP 2747095A2
Authority
EP
European Patent Office
Prior art keywords
solenoid valve
ring
magnet
pole ring
armature
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.)
Granted
Application number
EP13191453.3A
Other languages
German (de)
English (en)
Other versions
EP2747095B1 (fr
EP2747095A3 (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
Active legal-status Critical Current
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 out of DE 10 2010 030 600 A1 the applicant known.
  • the known solenoid valve has a magnet assembly with a magnetic coil which is arranged in a magnetic core, which in turn is accommodated in a magnet sleeve, which forms a carrier element for the magnetic core.
  • a residual air gap disc for adjusting a residual air gap is arranged in the usual manner between the magnetic core and the armature.
  • the disadvantage here is that for adjusting the residual air gap thus an additional component (residual air gap disc) is required, which increases the assembly and production costs.
  • residual air gap disc causes an increase in the number of contact surfaces on which deposits may possibly deposit, which may affect the function of the solenoid valve over the life considered.
  • residual air gap disks only certain, defined residual air gaps can be set, which result from the thickness of the residual air gap disks.
  • the invention has the object, a solenoid valve according to the preamble of claim 1 such that an improved adjustment of the residual air gap with a reduced number of components and increased robustness of the Solenoid valve, in particular against deposits is achieved.
  • This object is achieved in a solenoid valve with the features of claim 1, characterized 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 establish or formation of the residual air gap.
  • the carrier element has on the side facing the magnet armature a preferably radially circumferential first area and a second area axially added in relation to the first area in the direction of the magnetic core.
  • the first region forms the abutment surface for the magnet armature, and in the case of the armature adjoining the first region, the residual air gap is formed between the end face or end face of the magnet armature and the second region.
  • Solenoid valves are already known from the prior art, in which the magnetic coil is encapsulated, ie, is arranged protected from the entry of fuel or the like.
  • the support element consists of an inner pole ring and an outer pole ring, which are arranged concentrically to each other and which are connected to a non-magnetic intermediate element or a ring, such that the Carrier element on the side facing away from the magnet armature forms a receiving space for the magnet assembly that is hydraulically separated from a magnet armature space.
  • Such a design of the carrier element can be advantageously carried out manufacturing technology and also avoids the access of fuel to the region of the magnetic coil by the separation of the two spaces.
  • the residual air gap can be formed by the two areas being formed by depressions on the inner pole ring and / or on the outer pole ring and / or on the intermediate element, the size of the residual air gap being set by the dimension of the depression.
  • the intermediate element consists of solder material or of plastic, and that the depressions are produced by a machining operation, in particular by grinding.
  • the intermediate element is designed as a metal ring which is welded to the inner pole ring and the outer pole ring.
  • Such welding is preferably carried out by means of a laser beam welding device, which enables high-precision welds even on relatively small components and can also be monitored in terms of process technology.
  • a further preferred embodiment of the invention in which the effective pole face of the outer pole ring and / or the inner pole ring can be enlarged, suggests that the metal ring is arranged in coincidence with the end face of the magnet coil facing the metal ring and has a smaller width than the end face of the magnet ring magnetic coil.
  • the inner pole ring and / or the outer pole ring projects with a radial circumference into the region of the magnet coil, whereby the magnetic flux is amplified.
  • the mentioned metal ring can serve, for which purpose it projects beyond the end face of the inner pole ring and the outer pole ring on the side facing the magnet armature. If it is manufac-turing to position it precisely enough for the inner pole ring and the outer pole ring during welding, a mechanical material removal can thus be dispensed with.
  • the characteristic of the solenoid valve or of the residual air gap can also be influenced via a structured end face of the magnet armature on the side facing the magnet coil. Therefore it is in one further embodiment of the invention that the magnet armature on the side facing the magnetic core has a structured end face, in particular in the form of at least one annular peripheral step. Thus, in particular concentrically formed regions are formed on the end face of the magnet armature, which have different distances from the magnet core or the magnet coil.
  • the invention also includes a method for producing a solenoid valve according to the invention. It is provided that the residual air gap is adjusted by a material removal on a magnetic core and the magnetic coil receiving carrier element or by positioning a piece integrally connected to the carrier element ring. Such a method has the advantage that a highly accurate adjustment of the working air gap is made possible without the use of a separate component.
  • Fig. 1 1 is a detail of a solenoid valve 10 according to the invention, as it is preferably, but not restrictively, 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 serves to move up and down a valve member 11 shown only in its upper portion, which is pressed in the de-energized state by means of a compression spring 12 against a sealing seat, not shown.
  • the solenoid valve 10 When the solenoid valve 10 is energized, the valve member 11 lifts off from the sealing seat. This open position of the valve member 11 is in the Fig. 1 shown.
  • the actuation of the valve member 11 by means of a cross-hat-shaped armature 13, which is pressed with a sleeve-shaped portion 14 on 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 cooperates with a magnet assembly 18 which comprises a solenoid 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 accommodated 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 clamped by means of a union nut 23 axially with a valve housing body 24.
  • the two magnetic material elements of the carrier element 25 are connected to each other by means of a non-magnetic intermediate element 28.
  • the intermediate element 28 is preferably made of solder material and connects the inclined surfaces 29, 30 of the inner pole ring 26 and the outer pole ring 27 with each other.
  • a stepped bore 32 designed as a through-bore.
  • including the Magnetic armature 13 has at least one, but preferably a plurality of equally spaced angularly spaced through holes 33 which connects the stepped bore 32 with a magnetic armature space 34 hydraulically.
  • a receiving space 35 for the magnetic assembly 18 is formed by the carrier element 25 on the side opposite the magnet armature 13, which is sealed against the fuel-carrying areas of the injector 100.
  • the solenoid valve 10 When the solenoid valve 10 is energized, the magnet armature 13 is pulled in the direction of the magnet assembly 18 or the magnet coil 20, whereby the valve member 11 connected to the magnet armature 13 lifts off from its sealing seat and releases a fuel flow in the direction of the magnet armature space 34.
  • a second region 39 is formed, which is formed in the form of a recess 40.
  • the recess 40 is in the in the Fig. 1 and 2 illustrated embodiment on the magnet armature 13 facing end side of the inner pole ring 26 and the intermediate member 28, and formed in a small portion of the outer pole ring 27.
  • the geometric 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 operation, in particular by grinding.
  • a modified embodiment of the invention 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 member 28, and a small portion of the inner pole ring 26.
  • annular recesses 40b, 40c in the region of the inner pole ring 26 and the outer pole ring 27 are formed.
  • the annular raised portion 41 of the intermediate member 28a forms the stopper member for the armature 13.
  • Fig. 5 is one opposite the Fig. 4 illustrated modified embodiment in which the intermediate element 28b in the region of the outer pole ring 27, the end face 38 of the magnet armature 13 covers.
  • the recess 40d is formed substantially only in the region of the inner pole ring 26.
  • the intermediate element 28b also completely covers the region of the inner pole ring 26 on the end face facing the magnet armature 13 (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.
  • the intermediate element 28b edit accordingly or form in thickness according to the desired residual air gap 36.
  • Last is in the Fig. 6 a further embodiment of the invention shown in which the intermediate element 28, 28 a, 28 b according to the Fig. 1 to 5 is replaced by a metallic, non-magnetic ring 42.
  • the ring 42 is arranged in the illustrated embodiment in alignment with the magnetic coil 20 and has a smaller width than the magnetic coil 20. This means that the inner pole ring 26 and the outer pole ring 27, each with small surface portions 43, 44 in register with the end face of the magnetic coil 20 are.
  • the ring 42 protrudes beyond the inner and outer pole rings 27 via the respective planar end faces of the inner pole ring 26 and the outer pole ring 27 on the side facing the magnet armature 13, whereby the residual air gap 36 is determined by the measure. around which the ring 42 protrudes beyond the inner pole ring 26 and the outer pole ring 27.
  • the ring 42 is firmly 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 magnetic coil 20, respectively.
  • the formation of the welds 45, 46 is preferably carried out by a laser beam welding device.
  • the magnet armature 13 may have a depression or step 47, for example in a radially inner region, so that the residual air gap 36 in the region of the step 47 is enlarged relative to a radially outer region of the magnet armature 13.
  • a surface structuring of the magnet armature 13 on the side facing the magnetic coil 20 also in the in the Fig. 1 to 5 illustrated embodiments is conceivable.
  • Such a surface structuring may be provided in the form of a single depression or in the form of several depressions. Their shape and arrangement is essentially dependent on the particular application.
  • Such structuring of the magnet armature 13 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 a different manner, for example by gluing, instead of by welding. It is also conceivable to form the ring 42 in the form of a sheet metal part, which is connected by crimping with the inner pole ring 26, which is likewise designed as sheet metal parts, as well as outer pole ring 27. Finally, it is also conceivable to form the inner pole ring 26 and the outer pole ring 27 in the context of a powder metallurgical production. Such a powder metallurgy formation can take place by sintering or in the MIM process and comprises the use of at least two powdered materials having different magnetic properties. With regard to the intermediate element 28, it is mentioned that this can also be made 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)
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 true EP2747095A2 (fr) 2014-06-25
EP2747095A3 EP2747095A3 (fr) 2018-01-10
EP2747095B1 EP2747095B1 (fr) 2020-01-08

Family

ID=49546273

Family Applications (1)

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)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017001085A1 (fr) * 2015-06-30 2017-01-05 Robert Bosch Gmbh Sous-ensemble magnétique et injecteur de carburant pourvu d'un sous-ensemble magnétique
JP2018017191A (ja) * 2016-07-28 2018-02-01 株式会社デンソー 燃料噴射弁
WO2018021123A1 (fr) * 2016-07-28 2018-02-01 株式会社デンソー Soupape d'injection de carburant
JP2018025184A (ja) * 2016-07-28 2018-02-15 株式会社デンソー 燃料噴射弁

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3184244A1 (fr) 2020-06-24 2021-12-30 Bernhard Spiegl Electrovanne

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010030600A1 (de) 2010-06-28 2011-12-29 Robert Bosch Gmbh Minimierung des Ankerschließprellens durch ein Verzögerungsglied im Restluftspalt

Family Cites Families (3)

* 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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010030600A1 (de) 2010-06-28 2011-12-29 Robert Bosch Gmbh Minimierung des Ankerschließprellens durch ein Verzögerungsglied im Restluftspalt

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017001085A1 (fr) * 2015-06-30 2017-01-05 Robert Bosch Gmbh Sous-ensemble magnétique et injecteur de carburant pourvu d'un sous-ensemble magnétique
KR20180023967A (ko) * 2015-06-30 2018-03-07 로베르트 보쉬 게엠베하 자석 어셈블리 및 상기 자석 어셈블리를 포함하는 연료 인젝터
CN107810356A (zh) * 2015-06-30 2018-03-16 罗伯特·博世有限公司 磁组件和具有磁组件的燃料喷射器
CN107810356B (zh) * 2015-06-30 2020-01-10 罗伯特·博世有限公司 磁组件和具有磁组件的燃料喷射器
JP2018017191A (ja) * 2016-07-28 2018-02-01 株式会社デンソー 燃料噴射弁
WO2018021124A1 (fr) * 2016-07-28 2018-02-01 株式会社デンソー Soupape d'injection de carburant
WO2018021123A1 (fr) * 2016-07-28 2018-02-01 株式会社デンソー Soupape d'injection de carburant
JP2018025184A (ja) * 2016-07-28 2018-02-15 株式会社デンソー 燃料噴射弁

Also Published As

Publication number Publication date
DE102012224240A1 (de) 2014-06-26
EP2747095B1 (fr) 2020-01-08
EP2747095A3 (fr) 2018-01-10

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