EP4070346A1 - Actionneur électromagnétique avec position intermédiaire - Google Patents

Actionneur électromagnétique avec position intermédiaire

Info

Publication number
EP4070346A1
EP4070346A1 EP20828528.8A EP20828528A EP4070346A1 EP 4070346 A1 EP4070346 A1 EP 4070346A1 EP 20828528 A EP20828528 A EP 20828528A EP 4070346 A1 EP4070346 A1 EP 4070346A1
Authority
EP
European Patent Office
Prior art keywords
permanent magnet
armature unit
actuating
setting position
holding means
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.)
Pending
Application number
EP20828528.8A
Other languages
German (de)
English (en)
Inventor
Sebastian Bölling
Patrick Moll
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
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 ETO Magnetic GmbH filed Critical ETO Magnetic GmbH
Publication of EP4070346A1 publication Critical patent/EP4070346A1/fr
Pending legal-status Critical Current

Links

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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding
    • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/101—Electromagnets
    • 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2820/01—Absolute values
    • 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
    • H01F2007/1669—Armatures actuated by current pulse, e.g. bistable actuators

Definitions

  • the present invention relates to an electromagnetic actuator.
  • the present invention relates to an electromagnetic actuating device for providing an intermediate position in addition to a retracted and extended actuating position.
  • Electromagnetic actuating devices as actuators for a wide variety of actuating tasks in the motor vehicle sector are sufficiently known from the prior art. As shown, for example, in DE 20 114 466 U1, these generally energizable stationary coil means, armature means mounted axially movable relative to them, connected to a plunger, which can be driven along the plunger direction and moved out of the actuator housing as a reaction to energization of the coil means.
  • Such actuators are used in particular for adjusting the camshaft of an internal combustion engine, the tappet of the actuator being selectively engageable with a shift gate of a sliding cam.
  • the tappet of the actuator being selectively engageable with a shift gate of a sliding cam.
  • spring means in the actuator which support the repulsion of the armature from the energized coil means or from the core unit connected to it.
  • the spring means also enable a bistable design of the actuator without further energy supply to the coil means, the armature unit or a plunger connected to it remaining in the extended state as soon as the spring force is stronger than that between armature and Core unit acting attraction or retention force of the
  • EP 2474009 B1 discloses an actuator with a core area, which has permanent magnetic flux-conducting discs at both ends, which interact with permanent magnet means arranged at both ends of the armature unit and wherein in the third setting position none of these permanent magnet means adheres to the core area due to opposing forces of attraction.
  • the present invention is based on the object of overcoming or at least significantly reducing the aforementioned disadvantages of the prior art.
  • an improved electromagnetic actuating device is to be provided with which, in addition to a first and second actuating position, a third actuating position can be approached or provided, preferably selectively.
  • an additional structural effort in the implementation of such an adjusting device and in particular an increased installation space or space requirement for the device is to be minimized or avoided.
  • the invention relates to an electromagnetic actuating device comprising energizable stationary coil means with a stationary core area assigned to it, an armature unit with permanent magnet means that is movable relative to the coil means and core area and a plunger preferably arranged at one end with a free end section for engaging an actuating partner, in particular a Guide groove of a camshaft, wherein the armature unit can be moved along a longitudinal axis of movement in at least two setting positions, in particular in a first retracted setting position and a second extended setting position, and wherein the setting device has permanent magnetic flux-conducting holding means spaced apart from the core area, which for interaction with the
  • Permanent magnet means of the armature unit are formed in a third setting position between the first and second setting position, such that the armature unit is held in a third setting position between the first and second setting position and / or exerts a predefined force potential in the direction of the actuating partner.
  • the term “in the direction of the actuating partner” is understood here to mean, in particular, the application of a force potential to an actuating partner such as a guide groove, in particular in the direction of a contact surface such as a groove bottom of the guide groove.
  • the free end section of the plunger can be held firmly in the guide groove or pressed against the groove base by the force potential provided or the pressing force.
  • the force potential acts preferably coaxially or parallel to the longitudinal axis of movement, preferably in an extension direction of the plunger.
  • a force potential in Direction of a differently shaped or differently arranged surface or contact surface of an actuating partner assigned to the actuating device are provided in the third actuating position.
  • the force potential can also be present or exerted in the return direction of the plunger along the longitudinal axis of movement.
  • a force potential can act between a surface of the notch and a surface or contact surface of the actuating partner assigned to it.
  • the armature unit of the device preferably has permanent magnet means arranged at only one end.
  • the permanent magnet means preferably comprise a plurality of disk-shaped permanent magnets, which can be axially strung together along the longitudinal axis of movement.
  • the permanent magnet means preferably have a constant outer diameter.
  • disc-shaped elements made of magnetically flux-conducting material such as iron, for example, can be arranged axially at both ends of the permanent magnet means.
  • the anchor unit of the device preferably has a plunger arranged at one end with a free end section.
  • the armature unit has only one plunger which, starting from the permanent magnet means preferably arranged at one end, extends axially along the longitudinal axis of movement to an opposite end of the armature unit.
  • the plunger of the armature unit is preferably designed concentrically with the permanent magnet means.
  • the plunger extends preferably from one end of the permanent magnet means in the direction of an actuating partner and can for example be formed integrally with the permanent magnet means or as a separate component magnetically adhering thereto.
  • the plunger preferably has a constant outer diameter.
  • the device preferably comprises only one coil unit or coil means which is or are assigned to the respective one stationary core area.
  • the only one coil unit is preferably arranged at an end of the device opposite the free end section of the plunger.
  • the coil means or the coil unit is preferably connected to control means which can be selectively connected to the actuating device or can be formed integrally with the actuating device.
  • the control means are preferably designed to selectively provide a predefined current supply to the coil means, in particular a pulsed current application, preferably with a variable length.
  • the coil means preferably have only one coil winding. This means that in addition to the coil winding provided, no further winding, in particular no further coil winding with a different orientation, is made available. As a result, the space requirement and the weight of the electromagnetic actuating device can be minimized.
  • the armature unit is designed to interact with the coil means and the core area in such a way that, in response to a selective energization of the coil means, the armature unit is moved from the first to the second or third setting position, in particular by selecting a corresponding duration of the energization .
  • current can be supplied between 10 and 100 ms.
  • a short current pulse for example, can be used to move the armature unit to the third, intermediate setting position from 5 to 25 ms, more preferably from 10 to 20 ms.
  • a relatively longer current pulse of, for example, 20 to 100 ms, more preferably 25 to 75 ms, can be applied.
  • a magnetic field homopolar to the permanent magnet means of the armature unit is generated or formed in a manner known per se, which counteracts the field of the permanent magnet means otherwise adhering to the core area and thus repels the permanent magnet means from the core area and the Coil means leads.
  • the current supply is preferably stopped in each case.
  • the third intermediate setting position is kept stable in a currentless manner by the interaction of the permanent magnet means with the holding means.
  • the armature unit is preferably kept stable in the de-energized state of the coil means by an interaction of the permanent magnet means with the core area.
  • the second extended set position is preferably kept stable in a currentless manner by the interaction of the permanent magnet means with a guide element of the device, which is arranged opposite to the core area in the device and preferably consists of magnetically flux-conducting material.
  • the guide element is preferably used to guide the plunger and / or the anchor unit.
  • the anchor unit can also be used in the Core area be guided or stored and the tappet storage by means of the guide element.
  • the present invention makes it possible, through the magnetic interaction of the holding means and permanent magnet means, to provide a third setting position of the setting device in a structurally simple and cost-effective manner.
  • damping means that act differently, for example by means of structurally viscous fluid or by applying transverse force to the armature unit, for example by means of ball locking, an effective and at the same time low-wear and low-maintenance design of the actuating device can be provided.
  • the holding means are preferably arranged along a movement section of the permanent magnet means along the longitudinal axis of movement between the first retracted and second extended setting position and preferably coaxially to the permanent magnet means.
  • the holding means are preferably formed by a separate component which is held in the housing of the device at a predefined location, for example by means of corresponding bearing means.
  • the holding means can alternatively also be formed integrally with the housing of the device.
  • the holding means for interacting with the permanent magnet means are designed in such a way that a movement of the armature unit along the longitudinal axis of movement from the first retracted setting position to the second extended setting position is dampened or weakened and / or stopped when approaching or passing through the third setting position .
  • radial magnetic transverse forces preferably occur, in particular in a predefined stroke section H2 of the armature unit, which at least dampen the movement of the permanent magnet means and thus of the armature unit or weaken and / or stop.
  • the damping or weakening and / or stopping preferably take place in a currentless state of the coil means, that is to say in which there is no longer an initial application of current to the coil means for extending the. In the energized state of the coil means, the armature unit travels through the third actuating position with essentially no resistance.
  • the holding means are designed to interact with the permanent magnet means of the armature unit in such a way that the armature unit exerts a preferably essentially homogeneous force potential in the direction of the actuating partner via a predefined stroke section H3 between the first and second actuating positions.
  • the holding means are designed in such a way that, in addition to a radial magnetic transverse force, an axial force acting in the direction of the actuating partner acts or can be exerted on the actuating partner.
  • the third intermediate setting position lies in the predefined stroke section H3 and can be defined, for example, by engaging the plunger in a groove base of a setting partner.
  • the coil means can be energized in such a way that the intermediate third setting position of the armature unit is reached, the stroke of the armature unit being limited by contact with, for example, a groove base of the setting partner.
  • a preferably predefined force potential is then exerted on the setting partner. This can prevent the plunger from loosening from the actuating partner and thus effectively ensure that the third actuating position is held securely.
  • the predefined stroke section enables with preferably essentially homogeneous force potential, the provision of tolerance compensation for the installation of the device in control assemblies.
  • the term “essentially homogeneous” is understood here in particular to mean that the force potential over the predefined stroke section has a variance or deviation of less than 1.5N, preferably less than 1N, more preferably less than 0.5N and most preferably of less than 0.3N.
  • the force potential exerted on the actuating partner is preferably in the range from 0.1 to 5N, more preferably in the range from 1.5 to 3N.
  • the predefined stroke section H3 with preferably essentially homogeneous force potential preferably comprises a stroke of the armature unit and thus of the plunger along the longitudinal axis of movement of 0.5 to 2.5 mm, more preferably 1 to 2 mm.
  • the holding means comprise an essentially cylindrical flow-guiding element with a preferably constant inner and outer diameter or are formed by this.
  • the holding means are preferably arranged in the device in such a way that they preferably surround the permanent magnet means in the third setting position of the armature unit.
  • the holding element can be designed as a cylindrical rotating part.
  • the holding element is designed as a cylindrically bent or rolled sheet metal part with a preferably constant wall thickness.
  • the bleached part is bent into the desired shape from an originally rectangular sheet.
  • the holding element here preferably surrounds the permanent magnet means around a circumference of at least 330 °, more preferably of at least 350 °, most preferably of at least 355 °. They are particularly preferred Holding means around the entire circumference of the permanent magnet means, ie arranged closed around a circumference of 360 °.
  • the holding means comprise an essentially cylindrical flow-guiding element with a constant outer diameter and a variable inner contour.
  • the inner contour can, for example, have a structured surface.
  • the inner contour has an inner diameter that decreases in the direction of movement towards the second setting position.
  • the element has a preferably homogeneous cross-section in the form of half a truncated cone in relation to the circumference.
  • This shape of the holding element can also be designed as a rotating part.
  • the holding element can be designed in the form of a bent or rolled sheet metal part with a varying cross section based on its circumference.
  • the sheet metal part can preferably have at least two, preferably several, preferably similar cutouts or notches distributed around its circumference on one side. In the rolled-out state of the sheet metal part, these preferably have an essentially triangular shape. Alternatively, the cutouts or notches can also have a different geometric shape, in particular a trapezoidal shape. In this way, a very simple to manufacture and at the same time inexpensive solution for the holding means can be provided.
  • the holding means preferably have a height or extent along the longitudinal axis of movement which is essentially equal to or greater than the height or extent of the permanent magnet means in the direction of the longitudinal axis of movement. In an alternative embodiment, the holding means can also have a smaller height or extent than the holding means. As a result, the magnetic area of influence of the holding means can be shortened along the longitudinal axis of movement.
  • the height or extension of the holding means is preferably between 6 and 14 mm, more preferably between 8 and 12 mm.
  • a radial distance between the holding means and the permanent magnet means in particular a distance between an outer circumferential surface of the permanent magnet means and a
  • the inner circumferential surface of the holding means is preferably between 0.2 and 1.4 mm, more preferably between 0.3 and 0.8 mm.
  • An axial distance between the holding means and the core area along the longitudinal axis of movement is preferably between 1 and 7 mm, more preferably between 3.5 and 6 mm.
  • the holding means interact with the permanent magnet means in such a way that a movement of the armature unit along the longitudinal axis of movement from the first retracted setting position to the third intermediate setting position is supported and / or accelerated at least partially and preferably along a predefined stroke section H1 of the armature unit.
  • the movement of the anchor unit is supported by the holding unit when it leaves the first setting position, whereby the extension movement is shortened.
  • the device has no energy accumulator or spring means, in particular between the anchor unit and the core area.
  • the housing of the device is preferably formed from magnetically flux-conducting material.
  • the holding means are preferably spaced apart in the housing of the device or, alternatively, are arranged adjacent to the guide element.
  • the holding means and / or the guide element are preferably formed from soft magnetic material such as iron.
  • the invention relates to a system comprising an electromagnetic actuating device as described above and an associated actuating partner, in particular a sliding cam, having at least one first guide groove, preferably an S-groove known per se, and one that is radially higher on the actuating partner than that, that is, at a shorter distance from the adjusting device than the first groove, the second guide groove, preferably an X-groove known per se.
  • the invention relates to the use of the electromagnetic actuating device as described above for adjusting the camshaft on an internal combustion engine
  • FIG. 1a and 1b each show a schematic longitudinal section through a preferred embodiment of an electromagnetic actuating device according to the present invention in different actuating positions; 2 shows a side schematic sectional view of the electromagnetic adjusting device according to the invention, each in engagement with a guide groove of a camshaft with different adjusting positions;
  • FIG. 3 shows a force-displacement characteristic curve associated with the embodiment according to FIGS. 1 and 2 in the de-energized state of the coil means
  • FIG. 4 shows a longitudinal section through a further preferred embodiment of an electromagnetic adjusting device according to the present invention in different adjusting positions and in engagement with a guide groove of a camshaft with different adjusting positions;
  • FIG. 5 shows a force-displacement characteristic curve associated with the embodiment according to FIG. 4 in the de-energized state of the coil means
  • FIG. 6 shows a force-displacement characteristic curve associated with the embodiment according to FIG. 4 in the energized state of the coil means
  • FIG. 8a and 8b show a preferred embodiment of the holding means as a rolled or curved cylinder
  • FIG. 9a and 9b show a preferred embodiment of the holding means as a rolled or curved cylinder with at least two circumferentially arranged cutouts;
  • FIGS. 9a, 9b shows a preferred embodiment of the holding means as an alternative to FIGS. 9a, 9b.
  • the same elements and elements with the same function are provided with the same reference symbols.
  • FIG. 1a and 1b show a preferred embodiment of the electromagnetic actuating device 10 according to the invention in a side sectional view.
  • This has a housing 30 with a cylindrical housing section 30a, in which the further elements of the device described below are arranged as an assembly.
  • two assemblies are arranged next to one another in the housing 30 in the respective figures, in particular to clarify the setting positions.
  • the present invention is not restricted to this and thus also includes embodiments each having a respective assembly of the actuator.
  • more than two respective assembly (s) can be provided in a common housing 30.
  • the actuating device 10 comprises stationary coil means 1 that can be energized and a stationary and magnetically conductive core area 2 assigned to it.
  • the coil means 1 preferably have a coil body 1a and a coil 1b wound around the coil body 1a.
  • the adjusting device 10 also has an armature unit 3 that can be moved selectively with respect to the coil means 1 and the core region 2 along a longitudinal axis L of movement.
  • This comprises permanent magnet means 4 and a plunger 5 with a free end section 5a for engaging an actuating partner, in particular a guide groove 11 a, 11 b of an actuating partner 11, for example a camshaft (see FIG. 2).
  • the plunger 5 and the permanent magnet means 4 are preferably firmly connected to one another.
  • the permanent magnet means 4 are preferably arranged at one end on the armature unit 3 and the plunger 5 extends to the opposite end.
  • the plunger 5 is preferably in an end of the housing 30 opposite the coil means 1 guided cylindrical guide element 6, which is designed for example as an end housing section.
  • the respective tappet can be guided in a provided bore 6a of the guide 6.
  • the guide element 6 can be fitted into the housing section 30a and is preferably formed from magnetically flux-conducting material.
  • the core area 2 has a flat inner side 2a and is preferably designed to interact with the permanent magnet means 4 in such a way that in the de-energized state (cf. Fig. 1a left assembly) the permanent magnet means 4 adhere to the core area 2 and thus a stable first retracted setting position A of the anchor unit 3 can be provided.
  • the guide element 6 has a preferably planar inner side 6b, which is designed to interact with the permanent magnet means 4 in an extended second setting position B, such that in the de-energized state (cf. Fig. 1b, left-hand assembly) the
  • Permanent magnet means 4 preferably adhere to the guide element 6 and thus a currentlessly stable second setting position can be provided.
  • a return of the plunger 5 and thus the armature unit 3 from the second extended set position B to the first retracted set position A can take place in a manner known per se by mechanical return or pushing the plunger back by means of a flute change in a contact groove guide or the respective groove base .
  • the second set position B can also be provided by a preferably continuous energization of the coil means and thus by applying a preferably continuous repulsive force to the armature unit.
  • the plunger 5 can optionally also be returned by a return spring means or by means of its support.
  • Anti-adhesive means known per se can be provided between the permanent magnet means 4 and the core area 2 in order to maintain a predefined distance.
  • the permanent magnet means 4 preferably comprise at least one permanent magnet disk 4a, for example made of neodymium-iron-boron, which can be arranged centrally between two magnetically conductive disks 4b, 4c, for example made of iron.
  • the permanent magnet disk 4a and the adjacent disks 4b, 4c can be connected to one another by means of a thin adhesive film and / or be surrounded by a ring (not shown), preferably made of plastic. This can serve to prevent material from flaking off from the permanent magnet disk 4a.
  • the permanent magnet disk 4a and the adjacent disks 4b, 4c can also be connected with alternative connecting means in a force-fitting or form-fitting manner, for example by means of welding, caulking, etc.
  • the device has holding means 7 which conduct magnetic fluxes in a permanent manner. These are preferably arranged at a predefined axial distance d from the core area. This is preferably between 1 and 7 mm, more preferably between 3.5 and 6 mm.
  • the holding means 7 can also be arranged axially spaced apart from the guide element 6 arranged opposite to the core area by means of a distance d1.
  • the distance d1 is preferably between 1 and 7 mm, more preferably between 3.5 and 6 mm.
  • the holding means 7 are arranged centrally, i.e. at half the axial distance between the core area 2 and the guide element 6.
  • the outer peripheral surface of the permanent magnet means and an inner peripheral surface of the holding means is preferably between 0.2 and 1.4 mm, more preferably between 0.3 and 0.8 mm.
  • An extension or height h1 of the holding means 7 along the longitudinal axis of movement L is preferably essentially the same as or greater than the extension or height h2 of the permanent magnet means 4 in the direction of the longitudinal axis of movement L.
  • the holding means 7 can also have a smaller extension or height. Have height h1 as the holding means 7.
  • the holding means 7 are designed to interact with the permanent magnet means 4 of the armature unit 3 in a third setting position C (cf. FIGS. 1a and 1b, right-hand assembly) such that the armature unit 3 in the third setting position C between the first and second setting positions A. , B can be held and / or can exert a predefined force potential in the direction of a contacted actuating partner, as will be described in more detail below.
  • the holding means 7 have an essentially cylindrical holding element, which has a preferably homogeneous cross section.
  • a relatively short pulse-shaped current is applied to the coil means 1, as a result of which the permanent magnet means 4 are detached or repelled from the core area 2.
  • the armature unit 3 is initially at least partially supported or accelerated by a magnetic force of attraction that develops between the permanent magnet means 4 and the holding means 7. This takes place in particular via a predefined stroke section H1 (cf. associated force-displacement characteristic 40 in FIG. 3).
  • a subsequent stroke section H2 then dampens or slows down the movement of the armature unit 3, in particular through radially occurring magnetic transverse forces, through which the armature unit 3 comes to a standstill with a low initial drive by means of the comparatively short pulse-like current supply and in the intermediate position C by means of the Cooperation of permanent magnet means 4 and holding means 7 can be held.
  • the armature unit 3 is held at a stroke of approximately 3.3 mm (cf. zero crossing in FIG. 3).
  • the coil means 1 are subjected to a relatively longer pulse-shaped current, whereby the permanent magnet means 4 and thus the armature unit 3 experience a comparatively higher repulsion force or a higher initial drive.
  • the armature unit 3 experiences an additional magnetic force of attraction through the interaction of the permanent magnet means 4 and the guide element 6 (cf. lifting section H4 in FIG. 3).
  • FIG. 2 shows a preferred embodiment of the system according to the invention consisting of the actuating device 10 and an associated actuating partner 11, in particular a camshaft.
  • the adjusting device 10 can be inserted into or connected to a positioning device 20.
  • the actuating partner 11 has at least one guide groove 11a, for example an S-groove known per se, and one that is located radially higher on the actuating partner 11 relative thereto, ie at a shorter distance from the Adjusting device 10 as the first groove 11a arranged or extending, second guide groove 11b, preferably an X-groove known per se.
  • the free end section 5a of the plunger 5 is in contact with a respective groove bottom of the groove 11a, 11b.
  • the left assembly shows the second extended position B of the armature unit 3 and the right assembly shows the third intermediate position C of the armature unit 3.
  • the adjusting device can be used for adjusting processes with different groove heights or partially overlapping slide tracks of an actuating partner.
  • 4 shows a further preferred embodiment of the adjusting device 10 according to the present invention in different adjusting positions and in each case in engagement with a guide groove of an adjusting partner.
  • the holders have an alternative cross-sectional shape.
  • the holding means 7 are formed by an essentially cylindrical flow-guiding element with a constant outer diameter and a variable inner contour.
  • the inner contour has an inner diameter that decreases in the direction of movement towards the second setting position B.
  • the fold element 7 has a preferably homogeneous cross-section in the form of half a truncated cone in relation to the circumference. The folding element 7 rests on the guide element 6 or is arranged directly adjacent to the guide element 6.
  • This embodiment of the holding means 7 enable an interaction with the permanent magnet means 4 of the armature unit 3 in such a way that the armature unit 3 has a predefined flow section H3 (cf. Characteristic curve 41 in FIG. 5) exerts a preferably essentially homogeneous force potential in the direction of the actuating partner 11 between the first and second actuating positions.
  • the holding means are designed in such a way that, in addition to a radial magnetic transverse force, an axial force acting in the direction of the actuating partner 11 acts or can be exerted on the actuating partner.
  • the third intermediate set position C (right assembly in FIG. 4) lies in the predefined stroke section H3 and can be defined, for example, by engaging or resting the plunger 5 on a groove base of the groove 11b.
  • the force potential exerted on the actuating partner 11 is preferably in the range from 1 to 5N, more preferably in the range from 1.5 to 3N.
  • the predefined stroke section H3 preferably comprises a stroke of the armature unit 3 along the longitudinal axis L of movement of 0.5 to 2.5 mm, more preferably of 1 to 2 mm.
  • FIG. 5 shows a force-displacement characteristic curve 41 associated with the embodiment of FIG. 4 for the de-energized state.
  • FIG. 6 shows a force-displacement characteristic 42 associated with the embodiment of FIG. 4 for the energized state.
  • the adjusting device 10 is preferably designed in such a way that a relatively constant force potential over the stroke results in an initial stroke section H5.
  • the force potential preferably remains in a range from 0.5 to 2.5 mm stroke within a maximum deviation of 0.5 to 4N, more preferably from 1 to 3.5N. This provides a relatively constant force potential when the tappet is extended, particularly when wear occurs, in which, for example, due to abrasion on the tappet, the curve is shifted to the left in FIG. 6.
  • FIG. 7 shows schematically several alternative cross-sectional shapes 8a to 8f for the holding means 7.
  • the holding means 7 can have further cross-sectional shapes in addition to the cylindrical or annular cross-sectional shape 8 already described above and a frustoconical cross-sectional shape with an inner diameter 8b that decreases in the extension direction, such as For example, a cross-sectional shape with an inner diameter 8a that increases in the direction of extension.
  • the holding means 7 can also have a cross-sectional shape 8c, 8d with an essentially triangular notch.
  • the holding means 7 can have a cross-sectional shape with an essentially rectangular notch 8f. This can vary in shape and depth or even extend completely through the holding means 7 (see FIG. 8e).
  • the holding element 7 shows a particularly preferred embodiment of the holding element 7 as a cylindrically bent or rolled sheet metal part with a preferably constant wall thickness.
  • the bleaching part 9 is bent from an originally rectangular sheet 9 '(FIG. 8a) into the desired cylindrical shape 9 (FIG. 8b).
  • the holding element 7 obtained in this way can have a circumferential opening 9a due to the manufacturing process and, when inserted in the device 10, surrounds the permanent magnet means 4 by a circumference of preferably at least 330 °, more preferably at least 350 °, most preferably at least 355 ° .
  • 9a, 9b show an alternative embodiment of the holding element 7 as a cylindrically bent or rolled sheet metal part 12 with varying Cross-sectional shape based on its circumference.
  • the sheet metal part 12 preferably has at least two, preferably several, preferably similar cutouts 12a or notches distributed around its circumference on one side.
  • these preferably have an essentially triangular shape.
  • this results in elongated, curved crowns or projections 12c protruding from a cylindrical base body 12b.
  • the holding element 7 can have a peripheral opening or axially extending slot 12d
  • FIGS. 9a, 9b shows an embodiment of the holding element 7 that is alternative to FIGS. 9a, 9b, in which the cutouts or notches 12a have a different, in particular trapezoidal shape. This results in corresponding trapezoidal projections 12c.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un actionneur électromagnétique (10) ayant un moyen de bobine pouvant être excité stationnaire (1) avec une région de noyau fixe en paire (2) et comportant une unité d'induit (3), qui peut être déplacée par rapport au moyen de bobine (1) et la région de noyau (2) et qui comprend des moyens à aimant permanent (4) et un poussoir (5) qui est de préférence disposé au niveau d'une extrémité et qui présente une section d'extrémité libre (5a) destinée à venir en contact avec un partenaire d'actionnement, en particulier une rainure de guidage (11a, 11b) d'un arbre à cames (11), l'unité d'induit pouvant être déplacée le long d'un axe de déplacement longitudinal (L) dans au moins deux positions d'actionnement (A, B), en particulier une première position d'actionnement rétractée (A) et une deuxième position d'actionnement étendue (B), et l'actionneur (10) comporte des moyens de maintien (7) qui conduisent le flux d'un aimant permanent et qui sont disposés à une certaine distance de la zone de noyau et qui sont conçus pour interagir avec le moyen d'aimant permanent (4) de l'unité d'induit (3) dans une troisième position d'actionnement (C) entre la première et la deuxième position d'actionnement (A, B) de telle sorte que l'unité d'induit est maintenue dans une troisième position d'actionnement (C) entre la première et la deuxième position d'actionnement (A, B) et/ou un potentiel de force prédéfini est exercé dans la direction du partenaire d'actionnement.
EP20828528.8A 2019-12-06 2020-12-04 Actionneur électromagnétique avec position intermédiaire Pending EP4070346A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019133333.4A DE102019133333A1 (de) 2019-12-06 2019-12-06 Elektromagnetische Stellvorrichtung mit Zwischenposition
PCT/EP2020/084694 WO2021110944A1 (fr) 2019-12-06 2020-12-04 Actionneur électromagnétique avec position intermédiaire

Publications (1)

Publication Number Publication Date
EP4070346A1 true EP4070346A1 (fr) 2022-10-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20828528.8A Pending EP4070346A1 (fr) 2019-12-06 2020-12-04 Actionneur électromagnétique avec position intermédiaire

Country Status (5)

Country Link
US (1) US11967460B2 (fr)
EP (1) EP4070346A1 (fr)
CN (1) CN114930474A (fr)
DE (1) DE102019133333A1 (fr)
WO (1) WO2021110944A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL91041A0 (en) 1988-07-28 1990-02-09 H U Dev Corp Solenoid actuator
DE20114466U1 (de) 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
DE102008000534A1 (de) * 2008-03-06 2009-09-10 Zf Friedrichshafen Ag Elektromagnetische Stellvorrichtung
DE202009011804U1 (de) * 2009-09-01 2011-01-13 Eto Magnetic Gmbh Vorrichtung zur Nockenwellenverstellung einer Brennkraftmaschine
DE102009039562B4 (de) 2009-09-01 2020-03-19 Eto Magnetic Gmbh Bistabile elektromagnetische Stellvorrichtung
DE102010050755B4 (de) * 2010-11-10 2012-10-04 Eto Magnetic Gmbh Multistabile elektromagnetische Stellvorrichtung
DE102015213662A1 (de) * 2015-07-21 2017-01-26 Robert Bosch Gmbh Fahrzeug, Motor, Nockenwellenanordnung und Stellvorrichtung

Also Published As

Publication number Publication date
US20220384079A1 (en) 2022-12-01
WO2021110944A1 (fr) 2021-06-10
US11967460B2 (en) 2024-04-23
CN114930474A (zh) 2022-08-19
DE102019133333A1 (de) 2021-06-10

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