WO2017207035A1 - Dispositif de réglage électromagnétique et déphaseur d'arbre à came - Google Patents

Dispositif de réglage électromagnétique et déphaseur d'arbre à came Download PDF

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Publication number
WO2017207035A1
WO2017207035A1 PCT/EP2016/062292 EP2016062292W WO2017207035A1 WO 2017207035 A1 WO2017207035 A1 WO 2017207035A1 EP 2016062292 W EP2016062292 W EP 2016062292W WO 2017207035 A1 WO2017207035 A1 WO 2017207035A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
guide
magnet means
axial
electromagnetic actuator
Prior art date
Application number
PCT/EP2016/062292
Other languages
German (de)
English (en)
Inventor
Peter Vincon
Thomas Golz
Dirk MOSER
Philipp FANGAUER
Maria GRÜNER
Reinhold Hammer
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
Priority to PCT/EP2016/062292 priority Critical patent/WO2017207035A1/fr
Publication of WO2017207035A1 publication Critical patent/WO2017207035A1/fr

Links

Classifications

    • 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
    • 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

Definitions

  • Electromagnetic actuator as well
  • the invention relates to an electromagnetic actuator according to the preamble of claim 1, in particular for use in camshaft adjusting devices of internal combustion engines for interaction with a camshaft associated (adjustment) groove.
  • the electromagnetic actuator is bistable (preferably with exactly two, ie not more than two stable switching positions) and adheres by means of the permanent magnet means of the actuator in a retracted position of the actuator at the core region and in an extended position opposite to a preferably axially penetrated by the actuator Stroke limit (axial stop) on.
  • the electromagnetic adjusting device is characterized in that by energizing the coil means (electrical winding) a repulsive with respect to the permanent magnet means repulsive magnetic field is generated, which accelerates or displaces the permanent magnet means and thus the entire actuator axially away from the core area.
  • the core region of the electromagnetic actuator is axially stroke limiting and the electromagnetic actuator preferably has only a single, on only one axial side exiting and / or cooperating with a single actuator control element.
  • the invention relates to a camshaft adjusting device according to claim 1 1, comprising a trained according to the concept of the invention adjusting device, wherein the adjusting device is arranged such that, in particular by energizing the coil means in adjusting interaction with a camshaft of the internal combustion engine associated, preferably in the Camshaft itself provided groove can be brought.
  • the adjusting device is preferred in this case designed and arranged such that a retraction of the actuating element requires a mechanical impulse from the outside, in particular caused by the rotating camshaft, preferably to solve a permanent magnetic adhesion of the permanent magnet means of an axially spaced from the core region stroke limitation.
  • the adjusting element comprises permanent magnet means, which are protected on both axial sides of a pole piece. Radially outside the permanent magnet means is a plastic ring, which has the task of preventing chipping of material from the (brittle) permanent magnet disc or the penetration of splinters or dirt bodies in the running or movement range of the actuating element. In this case, the plastic ring terminates in the radial direction with the pole disk facing away from the core area axially.
  • the radial distance between the plastic ring and the pole disks and the inner circumference of a peripheral wall of the permanent magnet disc radially inside receiving armature space is dimensioned so that the aforementioned actuator elements certainly do not touch the peripheral wall in an axial adjustment and beyond an oil flow or exchange between the two each other opposite axial sides or axial sections of the armature space is ensured during the adjusting movement of the actuating element, in order to prevent that by a congestion effect, the dynamics of the adjusting device is greatly impaired.
  • the adjusting element is mounted and guided in an axially spaced apart from the permanent magnet means and the pole disks, jerk-shaped, elongated guide portion adjacent to the engagement end to prevent tilting of the actuating element.
  • the actuator of the elongated guide portion formed, which cooperates with a sleeve-shaped housing portion as a sliding bearing.
  • the known electromagnetic actuator has been proven especially for Nockenwellenverstelbine oxide, since the known actuator is characterized by high dynamics and is also bistable due to the permanent magnet means.
  • the known actuator is characterized by high dynamics and is also bistable due to the permanent magnet means.
  • the present invention seeks to provide an electromagnetic actuator, in particular for Nockenwellenverstellvorraumen of internal combustion engines, which is characterized by an axially shortened design and / or improved control element to minimize tilting tendency. Furthermore, the object is to provide a camshaft adjusting device with a correspondingly improved adjusting device.
  • the electromagnetic actuator with the features of claim 1, ie in a generic electromagnetic actuator characterized in that the actuator one, preferably disc-shaped, axially magnetized permanent magnet associated, preferably at least partially radially outwardly surrounding guide bushing, preferably from a non or comprises poorly magnetic flux-conducting material, which guides the adjusting element in its axial displacement on the inner circumference of the peripheral wall bounding the armature space radially outside.
  • the electromagnetic actuator the object is achieved with the features of claim 12.
  • the invention is based on the idea to associate the permanent magnet means of the actuating element with a guide bush and to arrange it relative to the inner circumference of the armature space radially outwardly bounding peripheral wall, that the guide bushing performs the adjusting element in its axial displacement on the aforementioned inner circumference.
  • the invention provides for the permanent magnet means to assign a guide bush, which preferably surrounds it at least in sections, such that it bounds a guide gap with the inner circumference of the peripheral wall delimiting the armature space or forms a sliding bearing which ensures that the control element is guided during its axial adjustment , and in addition to the guidance of the adjusting element at its, preferably with respect to the diameter of the permanent magnet means and / or the guide bush diameter-reduced or diameter-expanded (or alternatively the same diameter), guide portion.
  • the actuator is guided at two different axial positions or two different components / components in its adjustment, on the one hand by means of the guide bush on the outer circumference and the other with the guide portion, the purpose with radially outer, preferably sleeve-shaped guide means (Anvil) cooperates by between the guide portion of the actuating element and the Guide means (also) realized a guide gap or a sliding bearing is formed.
  • the guide portion can be formed axially shortened compared with known actuators, since the guide on two axially adjacent, in particular axially spaced areas of the Stellianos distributed. This can then result in an axial shortening of the actuating element, without negatively influencing the guiding properties - on the contrary, the guiding properties are improved due to the spreading or distribution of the guiding regions and thus the tilting tendency of the actuating element is minimized.
  • the guide bush to avoid magnetic short circuits, at least in a radially outer region of a magnetically non or poorly magnetic flux-conducting material, such as plastic, formed - in particular, the material is at least less magnetic flux-conducting than the armature space limiting peripheral wall.
  • electromagnetic actuator is bistable and the stroke of the actuator is limited at one end of the core area and the other end of a stroke limiter.
  • the adjusting device has no further stable switching position or axial position.
  • the stroke limitation is particularly preferably made of a magnetically good flow-conducting material in order to realize a bistable actuator, a magnetic adhesion of the permanent magnet means in to ensure the displaced from the core area away parking position of the control element.
  • the guide bush is arranged with axial distance to the guide portion of the actuating element, that is so the bearing bushing the bearing bushing is spaced in the direction of the adjustment axis of the actuating element or in the direction of the longitudinal extent of the actuating element of the guide portion comprehensive second bearing, in particular in such a way that the guide bush and the guide section lie opposite one another in an axial direction away from the core area with respect to an abovementioned stroke limitation which is preferably penetrated by the actuating element for limiting the axial stroke of the actuating element.
  • the stroke limitation is preferably designed for magnetically (adhering) interaction with the permanent magnet means.
  • the radial distance to the inner peripheral wall of the armature space be reduced as compared with prior art solutions, i. is limited to a guide play, as well as a guide play is preferably realized between the guide portion and the radially adjacent thereto, preferably sleeve-shaped guide means.
  • an embodiment of the invention embodied according to the inventive electromagnetic actuator, wherein on at least one axial side of the permanent magnet means, preferably on both axial sides of the preferably disc-shaped, in particular circular cylindrical disk-shaped permanent magnet means a non-permanent magnetic, but magnetic flux-conducting pole disc is arranged. It is preferable, in particular in each case, to protect a protective disk which protects the brittle, axially magnetized permanent magnet means, in particular an axially magnetized permanent magnet disk, from axially splitting against the core area and / or from the axial limitation of the travel distance from the material.
  • the pole disk facing away from the core area has a larger outside diameter in order to couple in a magnetic field resulting from the energization of the coil device into the actuating element on the axial side facing away from the core area.
  • an axial thickness extension of the pole disks is in each case between 1 mm and 2 mm and / or the preferably disc-shaped, axially magnetized permanent magnet means between 1.5 mm and 4.5 mm.
  • the outer diameter of the permanent magnet means is selected between 12mm and 18mm and / or the diameter of the pole discs between 13mm and 19mm.
  • the wall thickness of the guide bush in the radial direction is preferably between 1 mm and 3 mm.
  • the guide bush is preferably radially adjacent to the axially magnetized permanent magnet means.
  • the guide bush extends from the permanent magnet means preferably axially to a region radially outside of the at least one pole disk, preferably both pole disks and / or projects beyond the at least one pole disk, preferably both pole disks in the radial direction to the outside , Structurally, an embodiment of advantage, in particular for assembly reasons, in which the actuating element is designed in several parts, in particular also independent of the permanent magnet means, any pole discs and the guide bushing.
  • the adjusting element comprises a connecting element, on which the permanent magnet means are pushed axially with their guide bushing.
  • the connecting element additionally carries on its outer circumference at least one, preferably two pole disks spaced over the permanent magnet magnet means. It has been found to be particularly expedient to expand the connecting element at its end, in particular at the end facing the core region, in order to thus form an indirect or immediate axial stop for the permanent means or, in particular, a pole disk.
  • a this axially along the adjustment axis extending plunger part is fixed, on which preferably the guide portion is formed.
  • the plunger part is arranged in such a way that it clamps the permanent magnet means and preferably at least one pole disk, preferably two pole disks spaced apart the permanent magnet means, in particular against the above-mentioned, end diameter widening of the connecting element.
  • Tappet part and connecting element together preferably form an axial plunger or central portion of the actuating element.
  • the adjusting element is axially supported on the core area via the connecting element in the retracted position of the adjusting element, in order to protect the permanent magnet means and, if provided, a pole disk even better when abutting the core area. It is particularly useful if the Plunger part and the connecting element are formed from a non-magnetic or poorly flow-conducting material.
  • the pole disks and the plastic ring have a cylindrical outer surface and the oil exchange during the axial displacement of the adjusting element between the two axial sides of the armature space takes place through the radial gap between the plastic ring and the peripheral wall of the armature space - in the embodiment of the invention would such an approach without Other measures may adversely affect the dynamics, since the radial gap is reduced to the realization of a leadership game compared to the prior art.
  • it is possible in the actuator in particular by a Central portion of the control element and / or the permanent magnet means and possibly the pole disks through at least one circumferentially closed axial channel form.
  • the invention advantageously provides for assigning the guide bush to a preferably, but not necessarily regular, shell side contour or peripheral surface contour, with which at least one, preferably a plurality of circumferentially distributed radially inward-pointing depression (s) are formed, which in each case forms a fluid channel, in particular an oil channel, for ensuring an axial fluid or oil flow between the two axial sections of the armature space spaced apart by the permanent magnet means during the axial adjustment of the actuating element.
  • a fluid channel in particular an oil channel
  • At least one radially outwardly, ie in the direction of the peripheral wall open axial channel, preferably a plurality of radially outwardly open axial channels are formed on the outer circumference of the guide bush, through which the fluid exchange can take place.
  • the electromagnetic adjusting device can be realized without a spring element associated with the adjusting element or alternatively with such a spring element.
  • a spring element this is preferably arranged such, in particular between the core region and actuating element, that this repels the actuating element from the core region, i. the dynamics of the adjusting device for Wegverstellen the adjusting element of the core region, in particular into a camshaft groove, improved.
  • a tension spring can be realized which pulls the actuating element away from the core area.
  • a force acting in the direction of the core area force spring in accordance with the application.
  • FIG. 1 shows a longitudinal sectional view through an electromagnetic actuator designed according to the concept of the invention, in which two axially spaced bearing points are realized on the actuating element, and
  • FIG. 2 an assembly from FIG. 1, comprising a connecting element of the adjusting element with pole disks accommodated thereon and the permanent magnet means, and a guide bushing.
  • Fig. 1 shows an embodiment of a formed according to the concept of the invention electromagnetic actuator 1 for a camshaft adjusting device, in which an actuating element 2 of the electromagnetic actuator 1 with an engagement portion 3 directly or indirectly with a cam groove for adjusting the cam shaft cooperates in their rotation.
  • the electromagnetic adjusting device 1 comprises, in addition to the adjustable along a Verstellachse V, multi-part actuator 2, a stationary, possible flux-conducting core region 4, which is surrounded radially outside of a coil means 5, comprising one, here exemplified as a plastic injection molded coil support 6 and an electrical coil arranged thereon 7 (winding).
  • Coil device 5 and core region 4 are arranged in a cup-shaped, magnetically flow-conducting housing part 8.
  • the core region 4 limits the lifting movement of the adjusting element 2 along the adjustment axis V in the plane of the drawing upwards. Opposite this axial stroke is limited by a Hubbegrenzung 9.
  • Core 4 and stroke limitation 9 axially delimit an armature space 10, which is bounded radially outside of the inner circumference 1 1 of an inner cylindrical peripheral wall 12 of a further, sleeve-shaped housing part 13.
  • the adjusting element 2 here exemplarily disc-shaped, axially along the adjustment axis V magnetized permanent magnet means 14 which are enclosed on both axial sides between each pole plate 15, 16 of a magnetically conductive material.
  • the pole disks 15, 16 and the permanent magnet means 14 or a respective axial passage opening are penetrated by a magnetically non-flux-conducting connecting element 17 of the actuating element 2, which extends in the axial direction, and which on the core region 4 facing axial side has a thickening region 18, the here exemplarily, but not necessarily at the same time forms an axial stop for the axial abutment of the actuating element 2 at the core region 4.
  • the connecting element 17 is fixed here by way of example via a threaded connection 19 on a plunger part 20 which extends the connecting element 17 along the adjustment axis V, which in the concrete exemplary embodiment passes through a passage opening 21 in the stroke limiter 9 (axial stop section).
  • the plunger part 20 braces the assembly, comprising the pole disks 15, 16 and the permanent magnet means 14 against the thickened in diameter end portion (thickening portion 18) of the connecting element 17th
  • a guide portion 22 On the outer circumference of the adjusting element 2, in the concrete embodiment of the plunger part 20 is located at axial distance from the permanent magnet means 14, a guide portion 22, the sleeve-shaped guide means 23 (thrust bearing), in the shown Embodiment of the further housing part 13 are formed to limit a first guide gap 24 to guide the adjusting element 2 in its axial adjustment movement on the outer circumference.
  • a second guide gap 25 is formed radially between a guide bushing 26 of the adjusting element 2, which is axially back and forth adjustable with this, thereby leading the actuator in an axially spaced portion to the guide portion 22, on the inner circumference 1 1 of the peripheral wall 12th
  • the guide bush formed from a poorly or magnetically non-flux-conducting material for example made of plastic, is arranged radially outside the permanent magnet means 14 or rests radially on the latter or surrounds it - in the axial directions along the adjustment axis V extends Guide bushing 26 into a region radially adjacent to the pole disks 15, 16, which are thus spaced over the material thickness of the guide bush 26 and the guide gap 25 from the inner periphery 1 1 of the peripheral wall 12.
  • the stroke limiter 9 is formed of a magnetically flux-conducting material to in the second, extending from exactly two bistable switching positions on the permanent magnet means 14 to adhere to these. The return movement preferably takes place via a mechanical impulse to the engagement region 3, if necessary assisted by a corresponding (polarity reversed) energized coil device.
  • the guide bush 26 has a shell side contour 27, which forms corresponding axial fluid channels 28, as shown in FIG. 2 based on an embodiment.
  • FIG. 2 an assembly comprising the pole plates 15, 16 with sandwiched therebetween permanent magnet means 14 and these components radially outwardly surrounding guide bush 26 is shown, wherein in Fig. 2, the connecting element 17 is shown in section.
  • the shell side contour 27 of the guide bushing 26 which limits the radially outwardly open axial fluid channels 28.
  • the shell side contour 27 comprises a plurality of circumferentially juxtaposed, axially continuous recesses in the form of troughs, each two circumferentially juxtaposed wave troughs record a radial wave crest between them or are connected to each other.
  • Other or alternatively configured shell side contours 27 are alternatively feasible. Between the (radially outer) peaks of the wave crests and the inner circumference of the peripheral wall of the armature space, a guide gap is realized.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un dispositif de réglage électromagnétique (1), en particulier pour des déphaseurs d'arbre à came de moteurs à combustion interne. Le dispositif de réglage comprend un élément de réglage (2) formant, en particulier côté extrémité, une zone de contact (3) et mobile axialement le long d'un axe de déphasage (V), et comportant sur certaines parties, dans une chambre d'induit (10) délimitée radialement à l'extérieur par une paroi périphérique (12), des moyens formant aimant permanent (14) destinés à coopérer avec une zone de noyau fixe (4). Le dispositif de réglage comprend également un dispositif à bobine (5) fixe par rapport à l'élément de réglage (2) et destiné à produire une force antagoniste s'opposant à la force de retenue des moyens formant aimant permanent (14) magnétisés axialement et détachant ceux-ci de la zone de noyau (4), en réponse à un signal de commande électrique. L'élément de réglage (2) présente sur sa périphérie extérieure une partie de guidage (22) destinée à coopérer par guidage avec des moyens de guidage (23) fixes, de préférence en forme de manchon, lors du déphasage axial de l'élément de réglage (2). Selon l'invention, l'élément de réglage (2) comporte un manchon de guidage (26) associé aux moyens formant aimant permanent (14), entourant de préférence ceux-ci au moins en partie radialement à l'extérieur, et fait de préférence d'un matériau conducteur de flux de manière non ou faiblement magnétique. Le manchon de guidage guide l'élément de réglage (2), lors du mouvement de déphasage axial de celui-ci, sur la périphérie intérieure (11) de la paroi périphérique (12) délimitant la chambre d'induit (10) radialement à l'extérieur.
PCT/EP2016/062292 2016-05-31 2016-05-31 Dispositif de réglage électromagnétique et déphaseur d'arbre à came WO2017207035A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/062292 WO2017207035A1 (fr) 2016-05-31 2016-05-31 Dispositif de réglage électromagnétique et déphaseur d'arbre à came

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/062292 WO2017207035A1 (fr) 2016-05-31 2016-05-31 Dispositif de réglage électromagnétique et déphaseur d'arbre à came

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WO2017207035A1 true WO2017207035A1 (fr) 2017-12-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112412567A (zh) * 2020-10-12 2021-02-26 绵阳富临精工机械股份有限公司 一种凸轮移位电磁执行器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20114466U1 (de) 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
DE102010045601A1 (de) * 2010-09-16 2012-03-22 Hydac Electronic Gmbh Elektromagnetische Stellvorrichtung
DE102011009327A1 (de) * 2011-01-18 2012-07-19 Hydac Electronic Gmbh Elektromagnetische Stellvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20114466U1 (de) 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
DE102010045601A1 (de) * 2010-09-16 2012-03-22 Hydac Electronic Gmbh Elektromagnetische Stellvorrichtung
DE102011009327A1 (de) * 2011-01-18 2012-07-19 Hydac Electronic Gmbh Elektromagnetische Stellvorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112412567A (zh) * 2020-10-12 2021-02-26 绵阳富临精工机械股份有限公司 一种凸轮移位电磁执行器
CN112412567B (zh) * 2020-10-12 2021-09-07 绵阳富临精工机械股份有限公司 一种凸轮移位电磁执行器

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