EP3087575B1 - Elektromagnetische stellvorrichtung - Google Patents

Elektromagnetische stellvorrichtung Download PDF

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Publication number
EP3087575B1
EP3087575B1 EP14828454.0A EP14828454A EP3087575B1 EP 3087575 B1 EP3087575 B1 EP 3087575B1 EP 14828454 A EP14828454 A EP 14828454A EP 3087575 B1 EP3087575 B1 EP 3087575B1
Authority
EP
European Patent Office
Prior art keywords
plunger
armature
movement
stroke
unit
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
EP14828454.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3087575A1 (de
Inventor
Timo Rigling
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.)
ETO Magnetic GmbH
Original Assignee
ETO Magnetic GmbH
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Filing date
Publication date
Application filed by ETO Magnetic GmbH filed Critical ETO Magnetic GmbH
Publication of EP3087575A1 publication Critical patent/EP3087575A1/de
Application granted granted Critical
Publication of EP3087575B1 publication Critical patent/EP3087575B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • 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
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
    • 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
    • H01F7/1638—Armatures not 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/031—Electromagnets

Definitions

  • the present invention relates to an electromagnetic actuator according to the preamble of the main claim. Furthermore, the present invention relates to a camshaft adjusting system comprising such an electromagnetic actuating device in conjunction with a camshaft adjusting device of an internal combustion engine as preferred use of the electromagnetic actuating device.
  • the object of the present invention is therefore, with improved (in particular accelerated and gleichcolotem) control behavior of the plunger means to reduce the requirements of magnetic force and magnet arm of the armature unit, thus potentially the size of a generic electromotive actuator (both in the radial, and potentially in the axial direction) to reduce and thus to provide a device which combines favorable dynamic properties with a comparatively long effective working stroke of the plunger means.
  • the armature unit provided movable relative to the plunger means, so that the armature unit (preferably along its armature stroke) drive and can take along the plunger means, but the plunger means movable relative to the armature unit additionally a plunger stroke caused by the spring means according to the invention, can perform, which is inventively larger than the armature stroke itself.
  • the axially coupled arrangement of armature unit and plunger means cooperates with force application means acting on the shell side on the plunger means in the form of the pressure body according to the invention, which has adjacent ramps both with the ramp or cone section on the plunger means and with the plunger sections of larger or smaller diameter - or cone section cooperate can.
  • this arrangement is designed and dimensioned such that the armature unit entrains the plunger means along the direction of movement during its armature movement, whereby the plunger means are advanced as far as the (at least one, preferably radially predominantly distributed) pressure body until the cone or ramp (related to the / the pressure body) is overcome.
  • the further feed then happens by expansion of the spring means according to the invention (which have already already supported the armature movement to the armature stroke).
  • the combined action of both the anchor means, as well as the spring means, on the plunger means to an effective ram stroke, which is greater than the actual armature stroke; in practical embodiments of the invention, at least a factor of 1.5, more preferably at least a factor of 2.5.
  • the adjusting device according to the invention can be dimensioned to a much smaller armature stroke (with corresponding advantages of the mechanics and the construction volume), relative to an achievable control stroke.
  • the ramp or cone section according to the invention has an equally advantageous effect on the return of the adjusting device or the plunger means to the starting position.
  • the plunger means are reset from the engagement position (for example, by the engagement in the adjustment groove provided in the preferred use form "camshaft adjustment") only so far against the direction of movement, until - axially - the pressure body (s) reaches the ramp. or cone section reaches / s.
  • the shell-side force acting on the ramp or cone section to a further provision or force application of the plunger means in the direction of the starting position lead without this (in addition to the adjusting partner)
  • the anchor unit itself must have an armature stroke smaller than the ram stroke.
  • the pressure body is preferably a ball or spherical portion of a differently shaped pressure body, other variants are conceivable; It is nevertheless advantageous to arrange the pressure body, more preferably pretensioned by the pretensioning force of a compression spring which is preferably oriented radially to the direction of movement, in a plurality and around a circumference of the plunger means, so that a reliable influencing of the plunger movement by these pressure bodies can take place ,
  • a concrete arrangement of the spring is arbitrary and may depend on the circumstances in the surrounding housing; This also applies to the specific design of a spring.
  • the geometry of the ramp or cone section is important; In practical implementation, it has been found preferable to provide an extension of the ramp or cone section, which is greater than a (maximum) axial extent of the pressure hull, that is about a ball diameter.
  • a pitch angle of the Rampen- or cone section (as measured in longitudinal section relative to the longitudinal axis of movement) in the range between 20 ° and 60 °, preferably between 30 ° and 50 ° to provide.
  • the spring means more preferably realized as a pressure and / or coil spring, in a (hollow cylindrical) interior of the radially symmetrical tappet means provided;
  • the plunger means may have approximately a hollow cylindrical interior and / or an inner annular shoulder.
  • the spring means would then be able to support, for example, a portion of a housing guiding the plunger means, so that according to the invention the spring means can make their contribution to accelerating the plunger unit, wherein the armature unit can continue to have permanent magnet means as before and in otherwise known manner, alternatively but also electromagnetically operable in other ways relative to the stationary core unit.
  • the armature unit (or caused in the actuator electromagnetic drive of the armature unit) monostable to design, ie only provide an anchor initial position as a single stable end position, in which case while energizing the coil means though the armature unit is moved around the armature, after completion of the energization, however, the armature unit falls back into the armature's starting position.
  • This configuration is advantageous in cooperation with the plunger means in that the armature unit after the initial driving of the plunger means makes no contribution to further advancement of the plunger means (this is rather taken over by the spring means) while then returning, in particular by the interaction between the pressure body and Rampen- or cone section, no additional return or take along the anchor unit is necessary in the starting position.
  • an apparatus is provided by the present invention which significantly prolongs effective stroke length of existing generic actuators without requiring equally larger or bulkier magnet assemblies. Accordingly, there are significant advantages, in particular for the preferred application context "camshaft adjustment", not least in the manufacturing effort and in the space required installation space.
  • the present invention is not limited to this application context, but rather is also suitable for any other actuating applications in which long staging strokes are to be realized with limited electromagnetic means.
  • the reference numeral 10 symbolically shows an armature unit with an elongated armature tappet 12 and an armature body 14 which is widened relative to it.
  • the armature unit 10 is movable in an otherwise known manner relative to a stationary core unit (not shown), between an anchor home position ( Fig. 1 , right) and an armature feed position ( Fig. 1 , left half).
  • a typical armature stroke is in the range between 1 and 1.5 mm with an effective stroke of the plunger means of about 4 mm.
  • a plunger unit (plunger means) 16, which is guided in a surrounding plunger housing 18.
  • the plunger unit 16 is open on the bottom side for receiving the armature tappet portion 12; this is dimensioned so that it is in the anchor position ( Fig.1 , right half) a - small - distance from the plunger complies and only at feed the plunger 16 then along the direction of movement (in the plane of the figure Fig. 1 down).
  • a coil spring 22 is shown, which is supported at the other end of a ring bottom 24 of the plunger housing 18.
  • the coil spring 22 is correspondingly compressed and exerts a maximum bias on the plunger unit 16 in the downward direction of movement.
  • the ram unit 16 has, in the direction of the armature unit 10, a tappet portion 26 larger outside diameter; via a cone section 28, this (larger) outer diameter tapers in an engagement-side front tappet section 30 of reduced outer diameter.
  • the cone section 28 extends over an axial length of about 1.2 mm at an angle with respect to the vertical axis of motion of about 25 °.
  • the axial extent (axial length) of the cone portion 28 corresponds to the armature stroke, plus the (gap) distance between an engagement end 34 of the plunger unit and the actuator in the disengaged state.
  • grip pressure body 32 in the form of distributed around the circumference of the plunger unit 16 around balls on the lateral surface of the plunger unit; These balls 32 are biased by their own, horizontally (and thus radially to the longitudinal movement axis) extending compression springs 33.
  • Engaging side i. opposes the armature unit 10
  • the plunger unit 16 forms the engagement portion (engagement end) 34, which is dimensioned to cooperate with a shift groove 36 of an exemplary shown as a control partner shift gate 38 of a camshaft adjustment system;
  • the double arrow 40 illustrates the groove depth in the example shown by about 3.7 mm, which is covered by the ram stroke (here about 4 mm).
  • the left area of the Fig. 1 shows the fully ejected state of the armature plunger 16 from the housing 18.
  • the plunger unit 16 has a total stroke of about 4 mm performs and engages in this state in the groove 36 of the adjusting partner 38 a.
  • the camshaft adjustment takes place in an otherwise known manner.
  • the adjusting groove 36 also causes the return of the plunger 16 along a first return stroke section; Concretely, a decreasing groove depth (upon rotation of the gate 38) causes the plunger unit 16 to move in the return direction (ie in the plane of the figure) Fig. 1 pushed upward).
  • the device shown here is dimensioned such that this provision takes place axially as far along the first return stroke until the balls 32 engaging on the cylindrical lateral surface 26 reach the beginning of the cone section 28 (acting as a ramp). To this Time then leads the radial application of force to the balls 32 as a pressure body to that along the conical surface, the return movement is continued in the direction of the starting position, the cone so far a subsequent to the first return stroke of the groove second return stroke, to the in the Fig.
  • the plunger unit 16 in this return operation does not additionally reset the anchor unit 10 with (about by entrainment of the section 12), but took place immediately after the Bestromungsende already when taking out the plunger 16 is a falling back the anchor unit 10 in its monostable end position ( Fig. 1 , right).
  • a bistable design for example by means of a permanently magnetically realized anchor body 14, be useful, especially with regard to a so realized (magnetic field detected) position, motion and / or reset device.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electromagnets (AREA)
EP14828454.0A 2013-12-23 2014-12-18 Elektromagnetische stellvorrichtung Active EP3087575B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013114830.1A DE102013114830A1 (de) 2013-12-23 2013-12-23 Elektromagnetische Stellvorrichtung
PCT/EP2014/078547 WO2015097068A1 (de) 2013-12-23 2014-12-18 Elektromagnetische stellvorrichtung

Publications (2)

Publication Number Publication Date
EP3087575A1 EP3087575A1 (de) 2016-11-02
EP3087575B1 true EP3087575B1 (de) 2017-07-12

Family

ID=52394215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14828454.0A Active EP3087575B1 (de) 2013-12-23 2014-12-18 Elektromagnetische stellvorrichtung

Country Status (5)

Country Link
US (1) US9741481B2 (zh)
EP (1) EP3087575B1 (zh)
CN (1) CN105830179B (zh)
DE (1) DE102013114830A1 (zh)
WO (1) WO2015097068A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017117402A1 (de) * 2017-08-01 2019-02-07 Eto Magnetic Gmbh Vorrichtung und Verfahren zum Aktivieren eines Motorbremsbetriebs eines Verbrennungsmotors
DE102017213539A1 (de) * 2017-08-03 2019-02-07 Mahle International Gmbh Ventiltrieb
DE102017124485A1 (de) * 2017-10-19 2019-04-25 Eto Magnetic Gmbh Elektromagnetische Aktuatorvorrichtung und Verwendung einer solchen
CN108251977A (zh) * 2018-04-08 2018-07-06 苏州胜璟电磁科技有限公司 一种距离可调电磁铁
CN117123981B (zh) * 2023-10-26 2024-03-15 江苏快克芯装备科技有限公司 芯片吸取机构微压力装置及芯片焊接机

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Also Published As

Publication number Publication date
CN105830179A (zh) 2016-08-03
US9741481B2 (en) 2017-08-22
CN105830179B (zh) 2018-01-23
WO2015097068A1 (de) 2015-07-02
DE102013114830A1 (de) 2015-06-25
EP3087575A1 (de) 2016-11-02
US20160322146A1 (en) 2016-11-03

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