EP2073223A1 - Agencement d'aimant commutable comme élément de fixation pour une soupape ou d'autres éléments de fonction - Google Patents

Agencement d'aimant commutable comme élément de fixation pour une soupape ou d'autres éléments de fonction Download PDF

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Publication number
EP2073223A1
EP2073223A1 EP08021600A EP08021600A EP2073223A1 EP 2073223 A1 EP2073223 A1 EP 2073223A1 EP 08021600 A EP08021600 A EP 08021600A EP 08021600 A EP08021600 A EP 08021600A EP 2073223 A1 EP2073223 A1 EP 2073223A1
Authority
EP
European Patent Office
Prior art keywords
armature
magnet arrangement
switchable magnet
yoke
bearing
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.)
Withdrawn
Application number
EP08021600A
Other languages
German (de)
English (en)
Inventor
Axel Dr. Müller
Michael Frings
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.)
Thomas Magnete GmbH
Original Assignee
Thomas Magnete 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 Thomas Magnete GmbH filed Critical Thomas Magnete GmbH
Publication of EP2073223A1 publication Critical patent/EP2073223A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/08—Cores, Yokes, or armatures made from powder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/3443—Solenoid driven oil control valves

Definitions

  • the invention relates to a switchable magnet arrangement as an actuator or actuator for a valve or other functional elements having a magnetizable housing, an at least partially arranged in the magnetizable housing exciter coil, an axially energized when energizing the excitation coil armature, an armature piston and in the direction of actuation of the Actuator directed axial actuating rod comprises a one of the end faces of the housing final yoke and the other end face of the housing final cone-shaped guide body, wherein the guide body has an axial passage for the actuating rod.
  • Such a magnet arrangement is for example from DE 102 38 840 A1 known as camshaft adjuster.
  • connection pressures At the connections of electromagnetically driven valves prevail certain connection pressures. These can have undesirable repercussions on the position of the valve. To prevent this, the pressure level of a connection is led into the magnet and ensures that the surfaces on which the pressure acts are the same, so that pressure equalization is possible is.
  • the parts arranged inside the magnet such as the armature piston and / or the cone and sometimes also the yoke, are provided with longitudinal and / or transverse bores.
  • the preparation of these pressure equalization holes, especially in the anchor piston and the cone, is complicated and expensive. Another additional disadvantage can but be that when the transverse holes are not symmetrically arranged, this can lead to asymmetrical force effects of the electromagnet and thus increased switching hysteresis.
  • Such electromagnets are e.g. used in automotive engineering as a proportional solenoid for camshaft adjustment.
  • the proportional, speed-dependent adjustment of the intake / exhaust camshaft in car engines is used to increase torque at low speeds and to reduce pollutant and fuel consumption.
  • the proportional solenoid used in conjunction with a 4/2-way proportional valve in the engine compartment is bolted directly to the cylinder head.
  • the input signal of the magnet is the pulse-width-modulated supply voltage of the vehicle electrical system.
  • the duty cycle of the voltage, the valve piston position, or the oil volume flow is variably controlled via the proportional solenoid.
  • the intake and exhaust camshafts are adjusted relative to the crankshaft. This adjustment affects the timing of the exhaust and intake valves.
  • the main advantage of a camshaft adjustment is the reduction of exhaust emissions and the improvement of the torque curve.
  • the proportional solenoid is characterized by a low Bautellaniere and easy installation.
  • the anchor piston partly from a sintered material. This applies in particular to the axial region of the armature piston, which serves as a cover for the anchor rod. It is proposed a combination of sintered non-magnetic material with magnetic iron material, thus the magnetic properties (extension of the flux in the anchor) and at the same time to obtain improved properties against wear for the anchor rod.
  • the EP 1 667 177 A1 Although it discloses that the sintered magnetic material should have a porosity of 15% or less, this porosity is by no means sufficient to ensure sufficient flow through of the sintered material necessary for rapid pressure equalization. A possible pressure equalization or special flow characteristics are in the EP 1 667177 A1 also not mentioned or suggested.
  • the DE 83 17 753 U1 discloses an electromagnetic actuator, the pressure body can also be prepared by sintering, but here a binder for sealing the residual porosity of the sintered pressure body is proposed, so that the possibility of flow through the sintered pressure hull goes to zero. Again, a possible pressure equalization or special flow characteristics are neither mentioned nor suggested.
  • the magnetically conductive, media-permeable material is an open-pored, magnetically conductive, foam-like material, for example sintered metal.
  • the running surfaces of the armature piston can be machined.
  • the switchable magnet arrangement can be a lifting magnet, for example a proportional magnet.
  • the open-pore, magnetically conductive, foam-like material may contain sintered, iron-containing, possibly mixed with further alloying elements material.
  • the switchable magnet arrangement can be used according to the invention as a proportional magnet for adjusting the camshaft or as an actuator for a variable throttle. They are used as actuators in pneumatic, hydraulic and air conditioning systems.
  • FIG. 1 is a switchable magnet arrangement 1 according to the invention, for example, a proportional magnet for camshaft adjustment, shown with a magnetizable cup-shaped housing part 2, in which a, mounted on a bobbin 3, for example plastic excitation coil 4 is arranged.
  • a substantially plate-shaped magnetizable yoke 5 terminates the open cup-shaped housing part 2 in the axial direction.
  • an armature 6 is mounted axially movable.
  • a plunger 7 is arranged as an actuating rod, whose front, out of the magnet assembly facing end 8 as actually switching element for other functional parts, such as a valve spool, is used.
  • the plunger 7 is also held axially movable in a fixedly fitted guide body 9. This is cone-shaped and held in the axial direction below at a distance to axially extending flange portions 10 of the yoke 5.
  • the guide body 9 is held in a recess 11 in the bottom part of the cup-shaped housing part 2 and connects radially directly to the edge region 12 of the recess 11. This ensures the magnetic flux between these parts.
  • the armature 6 with the plunger 7 held therein and the cone-shaped guide body 9 are held in a pressure-tight armature space 13. This is sealed by a thin-walled sleeve 14.
  • the sleeve 14 is fixed axially on the recess 11 surrounding edge portion 12 of the cup-shaped housing part 2, for example, welded with a laser welding process, and thus enables the direct radial contacting of cup-shaped housing part 2 and cone-shaped guide body 9 to ensure an uninterrupted magnetic flux.
  • the connection between the sleeve 14 and the cup-shaped housing part 2 is in the DE 102 38 840 A1 described in detail.
  • the sleeve 14 itself may consist of a non-magnetizable stainless steel or the like. It has only a mechanical and sealing, but usually no magnetic function.
  • the sleeve 14 is provided with a shoulder 15, on which on the one hand in the pressure-tight armature space 13 of the conical guide body 9 and on the other hand supported in the outer space of the bobbin 3.
  • the thus assembled parts can be inserted into an injection mold and held by molding with plastic compound 16 firmly together.
  • one or more hold-down means are provided in the injection molding device, through which the yoke 5 are pressed onto the cup-shaped housing part 2, so that no interruption of the magnetic flux between the said parts can occur in the magnet assembly 1 thus produced.
  • connection flange for the entire magnet assembly 1 can be injected simultaneously, with fastening lugs 17, such as holes for mounting screws, are formed in the plastic mass 18 by appropriate design of the injection mold.
  • a cast-in metal reinforcement 18 in the attachment lugs 17 can increase their stability.
  • a plug 19 for electrical contacting of the excitation coil 4 in the plastic compound 16 is also integrated. This results in a particularly compact design using a minimum of components. Even in an externally vibration-prone continuous operation a stable contention of all cast parts is guaranteed.
  • the plastic compound 16 additionally insulates the current-carrying parts from and to the outside.
  • a control element With the magnet assembly 1, a control element can be formed, in which the valve slide is no longer formed as a unit with the armature 6 of the magnet assembly 1, but is decoupled from this. As a result, the axial height can be significantly reduced.
  • the valve spool can be acted upon by the plunger 7 in the printing operation against a return spring.
  • an O-ring 20 may serve.
  • the armature 6, the yoke 5 and / or the bearings 24 and 26 and / or the conical guide body 9, which are usually made in a spanender manner of solid material, at least partially be made of an open-pored, magnetically conductive, foam-like material , which is especially media-permeable.
  • This can be achieved, for example, in that these components, the armature 6, the yoke 5 and / or the guide body 9, are created by sintering.
  • a suitable open-pored, magnetically conductive, foam-like material for example, the known from a brochure of the company Hoeganaes with the note 0001-AsPA sintered iron-containing material in a phosphorus alloy with the trade name Ancorsteel ® can be used, which may be provided for use in such magnet ,
  • FIG. 2 a further embodiment of a switchable magnet assembly 21 according to the invention is shown, which may be, for example, a proportional solenoid for camshaft adjustment.
  • the magnetizable cup-shaped housing part 2, the bobbin 3 and the exciter coil 4 can as well as the article according to FIG. 1 be constructed.
  • a cup-shaped magnetizable yoke 22 closes the open cup-shaped housing 2 in the axial direction, wherein the yoke 22 and the cup-shaped housing part 2 are held in the axial direction at a distance.
  • a plunger 23 is held in the center of the cup-shaped magnetizable yoke 22 by a sintered bearing 24 inserted in an opening of a projecting bushing 25.
  • the plunger 23 is guided in a arranged in the center of the cone-shaped guide body 9 abutment 26 made of sintered material.
  • An armature 27 surrounds the plunger 23 and is connected to it for example by welding points.
  • the armature 27 has in its yoke 22 side facing an annular, the plunger 23 surrounded depression, in which engages the protruding bearing bush 25.
  • the plunger 23 is supported only in the cone-shaped guide body 9 and in the yoke 22 in the two sintered bearings 24 and 26.
  • One of the two sintered bearings 24 or 26 is mounted in a sintered yoke 22, made in a sintering process in which iron-containing material is sintered, and wherein the sintered bearing materials used are media-permeable, i. H. Gas and / or liquid are permeable.
  • the combination of sintered bearings 24 and 26 and sintered yoke 22 results in improved oil lubrication of the sintered bearings 24 and 26, thereby increasing the life.
  • the sintered abutment 26 can store oil in its pores in the contact area with the plunger 23, and thereby ensure oil lubrication of the rod-rod bearing in the first place.
  • the porous sintered yoke 22, however, ensures the exchange of oil from the armature space 13 of the armature 27 to the rear sintered bearing 24. Without this arrangement, the sintered bearing 24 would have only the gap between sintered bearing 24 and anchor rod 23 for the exchange / pressure compensation available.
  • the switchable magnet assembly Due to the embodiments of the switchable magnet assembly according to the invention to obtain a robust bearing having a higher durability due to improved mating a hard piston wall with the sintered bronze. Also, the switchable magnet assembly gets a better hysteresis due to reduced friction of the armature 6 or 27 and / or the plunger 7 or 23.
  • the components receive an open-porous structure, which ensures an internal pressure equalization in the armature space 13.
  • the desired pressure compensation can take place inside the components.
  • Required treads for the anchor 6 or 27 can be edited if necessary.
  • a material that has been produced in a sintering process can also be used only in such a way that the armature 6 or 27, the guide body 9 and, if necessary, the yoke 5 or 22 are only partially surrounded by porous material.
  • Dependent on the required pressure compensation and field of application shall be chosen to cover the non-sintered parts.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Magnetically Actuated Valves (AREA)
EP08021600A 2007-12-19 2008-12-12 Agencement d'aimant commutable comme élément de fixation pour une soupape ou d'autres éléments de fonction Withdrawn EP2073223A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007061862A DE102007061862A1 (de) 2007-12-19 2007-12-19 Schaltbare Magnetanordnung als Betätigungselement für ein Ventil oder andere Funktionselemente

Publications (1)

Publication Number Publication Date
EP2073223A1 true EP2073223A1 (fr) 2009-06-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08021600A Withdrawn EP2073223A1 (fr) 2007-12-19 2008-12-12 Agencement d'aimant commutable comme élément de fixation pour une soupape ou d'autres éléments de fonction

Country Status (2)

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EP (1) EP2073223A1 (fr)
DE (1) DE102007061862A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011104057A1 (fr) * 2010-02-23 2011-09-01 Schaeffler Technologies Gmbh & Co. Kg Dispositif de réglage d'arbre à cames
CN106050468A (zh) * 2016-07-22 2016-10-26 绵阳富临精工机械股份有限公司 一种电磁铁密封结构
CN111181351A (zh) * 2018-11-09 2020-05-19 Svm舒尔茨管理有限责任两合公司 具有支承件的电磁致动器
FR3125573A1 (fr) * 2021-07-20 2023-01-27 Valeo Systemes De Controle Moteur Actionneur pour un système de transmission de véhicule automobile

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013211816A1 (de) 2013-06-21 2014-12-24 Schaeffler Technologies Gmbh & Co. Kg Elektromagnetische Schaltvorrichtung
JP6536472B2 (ja) 2016-04-28 2019-07-03 株式会社デンソー ソレノイド
DE102018127583A1 (de) * 2018-11-06 2020-05-07 ECO Holding 1 GmbH Aktuator und Verfahren zum Herstellen eines Aktuators

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8317753U1 (de) 1984-11-29 Robert Bosch Gmbh, 7000 Stuttgart Stelleinrichtung
DE19537382A1 (de) * 1995-10-07 1997-04-10 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil, insbesondere Brennstoffeinspritzventil
DE10238840A1 (de) 2002-08-23 2004-03-04 Thomas Magnete Gmbh Magnetanordnung
EP1667177A1 (fr) 2003-09-17 2006-06-07 Hitachi Powdered Metals Co., Ltd. Mandrin de metal mobile fritte et son procede de fabrication
DE102005048732A1 (de) * 2005-10-12 2007-04-19 Schaeffler Kg Hydraulisches Wegeventil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19716185A1 (de) * 1997-04-18 1998-10-22 Zahnradfabrik Friedrichshafen Elektromagnetisch betätigtes Druckregelventil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8317753U1 (de) 1984-11-29 Robert Bosch Gmbh, 7000 Stuttgart Stelleinrichtung
DE19537382A1 (de) * 1995-10-07 1997-04-10 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil, insbesondere Brennstoffeinspritzventil
DE10238840A1 (de) 2002-08-23 2004-03-04 Thomas Magnete Gmbh Magnetanordnung
EP1667177A1 (fr) 2003-09-17 2006-06-07 Hitachi Powdered Metals Co., Ltd. Mandrin de metal mobile fritte et son procede de fabrication
DE102005048732A1 (de) * 2005-10-12 2007-04-19 Schaeffler Kg Hydraulisches Wegeventil

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011104057A1 (fr) * 2010-02-23 2011-09-01 Schaeffler Technologies Gmbh & Co. Kg Dispositif de réglage d'arbre à cames
CN102762823A (zh) * 2010-02-23 2012-10-31 谢夫勒科技股份两合公司 凸轮轴调节装置
US8991343B2 (en) 2010-02-23 2015-03-31 Schaeffler Technologies AG & Co. KG Camshaft adjusting device
CN102762823B (zh) * 2010-02-23 2016-01-20 舍弗勒技术股份两合公司 凸轮轴调节装置
CN106050468A (zh) * 2016-07-22 2016-10-26 绵阳富临精工机械股份有限公司 一种电磁铁密封结构
CN111181351A (zh) * 2018-11-09 2020-05-19 Svm舒尔茨管理有限责任两合公司 具有支承件的电磁致动器
FR3125573A1 (fr) * 2021-07-20 2023-01-27 Valeo Systemes De Controle Moteur Actionneur pour un système de transmission de véhicule automobile

Also Published As

Publication number Publication date
DE102007061862A1 (de) 2009-06-25

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