EP2352910A1 - Electromagnetic camshaft-adjuster device - Google Patents

Electromagnetic camshaft-adjuster device

Info

Publication number
EP2352910A1
EP2352910A1 EP10719727A EP10719727A EP2352910A1 EP 2352910 A1 EP2352910 A1 EP 2352910A1 EP 10719727 A EP10719727 A EP 10719727A EP 10719727 A EP10719727 A EP 10719727A EP 2352910 A1 EP2352910 A1 EP 2352910A1
Authority
EP
European Patent Office
Prior art keywords
unit
magnetic field
armature
permanent magnet
field detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10719727A
Other languages
German (de)
French (fr)
Other versions
EP2352910B1 (en
Inventor
Markus Laufenberg
Thomas Schiepp
Simone NOWAK
Bernd-Heinrich Schmitfranz
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
Mercedes Benz Group AG
Original Assignee
Daimler AG
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 Daimler AG, ETO Magnetic GmbH filed Critical Daimler AG
Publication of EP2352910A1 publication Critical patent/EP2352910A1/en
Application granted granted Critical
Publication of EP2352910B1 publication Critical patent/EP2352910B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • 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
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1844—Monitoring or fail-safe circuits
    • H01F2007/185—Monitoring or fail-safe circuits with armature position measurement

Definitions

  • the present invention relates to an electromagnetic camshaft adjusting device according to the preamble of the main claim.
  • Such a device is well-known from the prior art and serves the so-called return actuator, wherein, for example, a detected in the de-energized state of the coil unit and evaluated induction signal is evaluated according to the camshaft position moving armature unit at the terminals of the coil unit.
  • a device is shown for example in DE 10 2006 035 225 A1 of the Applicant.
  • camshaft adjustment monitoring is combined with an already existing knock sensor electronics, combined with a lambda probe electronics, or a Crankshaft acceleration is detected and evaluated.
  • the induction voltage measured in the generic manner depends on factors such as the speed of movement (this in turn depends on the engine speed), the current ambient temperature, soiling, etc., so that a desired reliable detection of faulty circuits is not possible guaranteed in every operating condition.
  • Object of the present invention is therefore to provide a simple, reliable and with low manufacturing technology see and evaluation effort to realize camshaft adjusting device, in which a current camshaft adjustment state or a current position of the camshaft adjustment causing armature, including driven actuator reliably can be determined.
  • the housing or carrier unit accommodating the camshaft adjustment device is associated with stationary magnetic field detection means which cooperate with permanent magnet means movable in accordance with the armature and / or actuator unit so that in all operating states, namely the energization state of the Coil unit and the non-Bestromungsschreib the coil unit, through this magnetic Field detection an axial position determination is possible.
  • the magnetic field detection means are advantageously realized as separate sensor means separate from the coil unit, which sensor means are constructed in an otherwise known manner and advantageously in the context of preferred developments as sensor sensors realized as Hall sensors, GMR or AMR sensors.
  • the armature unit itself has a permanent magnet unit in the context of the electromagnetic adjustment, which advantageously performs an advancing movement of the armature unit (and actuating unit) by energizing the coil unit.
  • This movement of the permanent magnet unit in the armature unit can then be determined in a very simple manner by the magnetic field sensor, in particular if it is provided adjacent to the permanent magnet unit and a change of the permanent magnetic field can be detected thereby (variable in movement).
  • the ram unit is wholly or partially permanent magnetically, wherein it is in this context, but also in the design of a permanent magnet on the armature unit, further advantageous, a connection between actuator ( designed as a ram unit) and anchor unit Permanent magnetic adhesion between these units releasably designed.
  • the at least one magnetic field sensor for realizing the magnetic field detection means is provided at a stationary position in the housing or carrier unit, where - meaningful for manufacturing and trouble-free operation - it makes sense to this sensor (possibly together with other stationary aggregates of the device) in a otherwise known manner by means of a polymeric potting material or the like to shed moisture and dirt protected.
  • a (relative) position of the magnetic field sensor unit in the housing can also be fixed in this way, for example by virtue of the fact that the potting compound completely or partially encloses the sensor.
  • Figure 1 is a schematic view of the structure of the electromagnetic camshaft adjusting device according to a first embodiment with an anchor unit and a ram unit associated therewith;
  • FIG. 2 shows a device analogous to FIG. 1 with a pair of armature units, which are provided side by side and can be moved separately from each other, each having a seated tappet unit and in each case one associated sensor unit;
  • FIG. 3 shows a further embodiment analogous to FIG. 2, but with a sensor unit jointly provided for both armature units or tappet units;
  • Figure 4 is a sectional view perpendicular to the longitudinal axis of movement of the arrangement of Figure 3 with the shown, with respect to both Ankerg. Plunger units symmetrically arranged sensor unit;
  • FIG. 5 shows a variant of the representation according to FIG. 4 with asymmetrically arranged sensor unit, ie different radial distance of the sensor unit to an armature or ram unit relative to the other armature or ram unit;
  • FIG. 6 shows a longitudinal section through a concrete realization form of the electromagnetic camshaft adjusting device for realizing the scheme of FIG. 1;
  • Figure 7 shows a longitudinal section through the upper housing portion of the embodiment of Figure 6 and
  • FIG. 8 shows a perspective view of a detail from FIG. 7 for clarifying the three-dimensionality.
  • FIG. 1 illustrates the structure and operation principle of the electromagnetic camshaft adjusting device according to a first embodiment of the invention:
  • a stationary coil unit 10 is provided, which is formed around a stationary core 12 around.
  • an anchor unit 14 In this stationary units in the axial direction (ie longitudinal direction in Figure 1) movably mounted is an anchor unit 14 with anssitzender ram unit 16, which with its engagement-side end 18 in an otherwise known manner for cooperation with a groove or the like. a camshaft adjustment is formed.
  • the armature unit 14 has a permanent magnet unit 20 which axially magnetises in the manner shown and faces the core unit such that in response to energizing the coil unit 10, the armature unit together anssitzender ram unit 16 (this is either fixed or by adhesive force of the permanent magnet unit 20 solvable the permanent magnet unit held) in the axial direction
  • the permanent magnet unit 20 is associated with a stationary sensor unit 22 (suitable in the housing not shown in the figures), which detects the permanent magnetic field and, suitably realized as a Hall element, detect this magnetic field and its change by movement of the armature unit 14 and a subsequent electronic evaluation can perform.
  • a stationary sensor unit 22 suitable in the housing not shown in the figures
  • this basic realization form makes it possible to generate a correspondingly positionally variable signal along a suitable movement stroke of the armature unit 14, which is advantageous at approximately the known principle of detecting an induction voltage at the coil ends of the unit 10 in the de-energized state
  • Coil unit 10 can perform a position detection and can detect the position, even if the anchor unit does not move, so stands still at a corresponding position.
  • Figure 1 (as well as in Figures 2 to 5) show only the schematic interaction for realizing the basic principle of the invention; the concrete realization of an embodiment is related explained with reference to Figures 6 to 8, further with reference to a favorable realization of the actuator shown in Figures 1 to 5 reference is made to the disclosed patent application DE 20 2008 010 301 of the applicant, which in terms of the design of a surrounding housing, the core -, yoke and anchor unit and the coil unit as part of the invention should be included in the present application.
  • FIG. 2 A particularly advantageous development shows the embodiment of Figure 2, in which (here in a common housing, not shown), a pair of actuators, each consisting of coil unit 10, core unit 12 and anchor units 14a and 14b is provided side by side; especially in the context of a camshaft adjustment devices are often used with two plungers, wherein a first plunger 16a is used to move the camshaft adjustment mechanism in a first position and an axially parallel driven second plunger 16b is used to return to the starting position to effect. Due to the often restrictive space requirements, the arrangement shown by way of example and schematically in FIG. 2 is accommodated in a common housing.
  • FIG. 2 also shows two sensors 22a and 22b, which, analogous to the representation of Figure 1 (to that extent also corresponding reference numerals are used), a respective anchor unit or ram unit are assigned.
  • FIG. 3 shows a variant of the realization form of FIG. 2 (and in turn, in the case of comparable assemblies, FIG. pen corresponding reference numerals used).
  • the device of Figure 3 shows a common sensor unit 22c, which, compare the cut at the height of the sensor radial section of Figure 4, approximately symmetrical between two anchor units (respectively Permanent magnets 20) is arranged, such that a radial distance influencing the measured field strength is equal to both permanent magnet arrangements 20 in the sectional plane and at the same axial position of the armature units 14a, 14b a magnetic field which is the same in absolute value but divergent in the respective direction Magnetic field generated.
  • FIG. 1 Surrounded by a cylindrical housing shell 30 and encapsulated by a plastic potting material 32 is a coil unit together with core unit (recognizable is only a planar end portion 34, which protrudes from the encapsulation) provided; in a manner not shown in more detail, the coil unit is electrically contacted and the connecting cable for external contacting to an integrally ansitzenden Steckerab ⁇ section 36 out.
  • core unit recognizable is only a planar end portion 34, which protrudes from the encapsulation
  • a cylindrical sensor unit 38 is mounted in the housing so that it is enclosed in about half of the potting material 32 and protrudes with its (in the figure 6 lower) half in a cavity 40 in the housing 30.
  • axially relatively movable to the core 34 protrudes from the opposite side of an armature unit 42 which centrally carries a disc-shaped permanent magnets 44, which in the manner described above without contact with the sensor unit 38 cooperates so that in axial (ie Figure 6 vertical) movement of the armature unit, the stationary sensor unit 38 detects a changing permanent magnetic field and this (not shown in detail) feeds a subsequent electronic processing.
  • the housing 30 is closed on the bottom side with an end piece 46, in which a ram unit 48 is guided; this contacts at one end (in the upper end) the armature unit 42 or is part of this, in the opposite end region of the camshaft adjusting engagement portion 18 is formed.
  • Channels 50 in the bottom piece 46 serve for venting and a circumferential radial seal 52 of the seal against a receiving housing of the control partner, eg the camshaft housing.
  • FIG. 8 once again illustrates in a favorable manner how the potting compound 32 is provided in the housing shell 30 and the sensor unit 38 holds reliably, dirt-protected and easily mountable at its relative position to the permanent magnet 44 or to the anchor unit 42.
  • the present invention is not limited to the described embodiments. Although it is favorable to use a conventional permanent magnet detector principle (Hall, GMR or AMR) for the sensor unit, other magnetic detection options are also conceivable.
  • a conventional permanent magnet detector principle Hall, GMR or AMR
  • the present invention is also favorable as a camshaft adjustment device, but the principle of electromagnetic actuators, in particular in conjunction with a permanent magnet at the armature and a stationary magnetic field detection of this armature, is suitable for basically any control tasks which are advantageous in the manner described and need reliable detection of the armature or plunger position for any operating situations.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Valve Device For Special Equipments (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

An electromagnetic camshaft-adjuster device having an armature unit (14, 42) drivable along an axial direction in reaction of a current feed of a stationary inductor unit (10), which for interacting with an adjusting unit (16, 48) causing adjustment of a camshaft of an internal combustion engine is configured with a slide and/or tappet unit, wherein on and/or in the armature unit and/or the adjusting unit, a permanent magnet element (20, 44) is provided and the inductor unit and the armature unit are at least partially received in a housing or supporting unit, and wherein the supporting unit is associated with a configured stationary magnetic field detection element (22, 38) preferably for contactless magnetic interaction with the permanent magnet element, which is configured so that in a current feed condition and a non current feed condition the inductor unit an axial position of the armature unit and/or the adjusting unit can be determined electronically by evaluating a magnetic field detection signal of the magnetic field detection element.

Description

Elektromagnetische Nockenwellen-VersteilVorrichtung Electromagnetic Camshaft Verification Device
Die vorliegende Erfindung betrifft eine elektromagnetische Nockenwellen-Verstellvorrichtung nach dem Oberbegriff des Hauptanspruchs .The present invention relates to an electromagnetic camshaft adjusting device according to the preamble of the main claim.
Eine derartige Vorrichtung ist aus dem Stand der Technik allgemein bekannt und dient der sogenannten Rückstellerfassung, wobei beispielsweise ein in unbestromtem Zustand der Spuleneinheit erfasstes und ausgewertetes Induktionssignal der sich entsprechend der Nockenwellenstellung bewegenden Ankereinheit an den Anschlussklemmen der Spuleneinheit ausgewertet wird. Eine derartige Vorrichtung zeigt beispielsweise die DE 10 2006 035 225 Al der Anmelderin.Such a device is well-known from the prior art and serves the so-called return actuator, wherein, for example, a detected in the de-energized state of the coil unit and evaluated induction signal is evaluated according to the camshaft position moving armature unit at the terminals of the coil unit. Such a device is shown for example in DE 10 2006 035 225 A1 of the Applicant.
Darüber hinaus gibt es weitere Möglichkeiten, eine korrekte Funktion einer Nockenwellenverstellung zu überwachen, wobei jedoch auch dies indirekt erfolgt, indem etwa eine derartige Nockenwellen-Verstellungsüberwachung mit einer ohnehin vorhandenen Klopfsensor-Elektronik kombiniert wird, mit einer Lambda-Sondenelektronik kombiniert wird, oder aber eine Kurbelwellenbeschleunigung erfasst und ausgewertet wird.In addition, there are other ways to monitor a correct function of a camshaft adjustment, but this is done indirectly, for example, such a camshaft adjustment monitoring is combined with an already existing knock sensor electronics, combined with a lambda probe electronics, or a Crankshaft acceleration is detected and evaluated.
All diesen Vorgehensweisen ist jedoch gemeinsam, dass eine Fehlfunktion aus dem jeweiligen Signal nur schwer zu ermitteln ist und entsprechend eine sehr aufwändige (und potenziell unzuverlässige) elektronische Signalauswertung zum Ermitteln der konkreten Stößelposition (Stelleinheit) für die Nockenwelle notwendig ist. Hinzu kommt, dass bei der als gattungsbildend herangezogenen Induktionstechnologie prinzipbedingt nur eine Bewegung des Stößels bzw. der Ankereinheit ermittelt werden kann, nicht jedoch dessen/deren Stillstandsposition; insbesondere ist es mit Mitteln derHowever, all these approaches have in common that a malfunction from the respective signal is difficult to determine and accordingly a very complex (and potentially unreliable) electronic signal evaluation for determining the specific ram position (actuator) for the camshaft is necessary. In addition, in principle, only one movement of the plunger or the anchor unit can be determined in the case of the induction technology used as a generic type, but not its / their standstill position; In particular, it is by means of
BESTÄTIGUNG6KOPIE Auswertung einer Induktions-Spulenspannung nicht möglich, eine (stehende) Endposition des in die Nockenwelle eingreifenden Stößels (Stelleinheit) zuverlässig zu erfassen.BESTÄTIGUNG6KOPIE Evaluation of an induction coil voltage not possible to reliably detect a (standing) end position of the engaging in the cam shaft plunger (actuator).
Als weiteres potenzielles technisches Problem ergibt sich, dass die in der gattungsgemäßen Weise gemessene Induktionsspannung von Faktoren wie Bewegungsgeschwindigkeit (dies ist wiederum abhängig von der Motordrehzahl) , der aktuellen Umgebungstemperatur, Verschmutzungen usw. abhängig ist, so dass damit eine gewünschte sichere Erkennung von Fehlschaltungen nicht in jedem Betriebszustand gewährleistet ist.Another potential technical problem is that the induction voltage measured in the generic manner depends on factors such as the speed of movement (this in turn depends on the engine speed), the current ambient temperature, soiling, etc., so that a desired reliable detection of faulty circuits is not possible guaranteed in every operating condition.
Aufgabe der vorliegenden Erfindung ist es daher, eine einfache, zuverlässige und mit geringem herstellungstechni- sehen und Auswertungsaufwand zu realisierende Nockenwellen- Verstellvorrichtung zu schaffen, bei welcher ein aktueller Nockenwellen-Verstellzustand bzw. eine aktuelle Position eines die Nockenwellenverstellung bewirkenden Ankers samt dadurch angetriebener Stelleinheit zuverlässig ermittelt werden kann.Object of the present invention is therefore to provide a simple, reliable and with low manufacturing technology see and evaluation effort to realize camshaft adjusting device, in which a current camshaft adjustment state or a current position of the camshaft adjustment causing armature, including driven actuator reliably can be determined.
Die Aufgabe wird durch die Vorrichtung mit den Merkmalen des Hauptanspruchs gelöst; vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben.The object is achieved by the device having the features of the main claim; advantageous developments of the invention are described in the subclaims.
In erfindungsgemäß vorteilhafter Weise sind der die Nockenwellen-Verstellvorrichtung aufnehmenden Gehäuse- bzw. Trägereinheit stationäre Magnetfeld-Detektionsmittel zugeordnet, welche mit entsprechend der Anker- und/oder Stellein- heit-Bewegung beweglichen Permanentmagnetmitteln so zusammenwirken, dass in allen Betriebszuständen, nämlich dem Bestromungszustand der Spuleneinheit und dem Nicht- Bestromungszustand der Spuleneinheit, durch diese Magnet- feld-Detektion eine axiale Positionsbestimmung möglich ist. Dies bedeutet, dass erfindungsgemäß eine Abkehr vom gattungsgemäßen Prinzip der Erfassung einer Spulen- Induktionsspannung im unbestromten Zustand erfolgt; viel- mehr sind vorteilhaft die Magnetfeld-Detektionsmittel als von der Spuleneinheit getrennte, separate Sensormittel realisiert, welche in ansonsten bekannter Weise und vorteilhaft im Rahmen bevorzugter Weiterbildungen als Hall- Sensoren, GMR- oder AMR-Sensoren realisierte Sensormittel ausgebildet sind.In an advantageous manner according to the invention, the housing or carrier unit accommodating the camshaft adjustment device is associated with stationary magnetic field detection means which cooperate with permanent magnet means movable in accordance with the armature and / or actuator unit so that in all operating states, namely the energization state of the Coil unit and the non-Bestromungszustand the coil unit, through this magnetic Field detection an axial position determination is possible. This means that according to the invention a departure from the generic principle of detecting a coil induction voltage in the de-energized state takes place; On the contrary, the magnetic field detection means are advantageously realized as separate sensor means separate from the coil unit, which sensor means are constructed in an otherwise known manner and advantageously in the context of preferred developments as sensor sensors realized as Hall sensors, GMR or AMR sensors.
Besonders bevorzugt, da konstruktiv einfach, ist dabei die Realisierung gemäß einer bevorzugten Ausführungsform, bei welcher die Ankereinheit im Rahmen der elektromagnetischen Verstellvorrichtung selbst eine Permanentmagneteinheit aufweist, welche vorteilhaft etwa durch Bestromen der Spuleneinheit eine das Antreiben der Ankereinheit (und Stelleinheit) bewirkende Vorschubbewegung ausführt. Diese Bewegung der Permanentmagneteinheit in der Ankereinheit lässt sich dann auf sehr einfache Weise von dem Magnetfeld-Sensor ermitteln, insbesondere wenn dieser der Permanentmagneteinheit benachbart vorgesehen ist und dadurch (bewegungsveränderlich) eine Veränderung des Permanentmagnetfeldes detek- tiert werden kann.Particularly preferred, since structurally simple, is the realization according to a preferred embodiment, in which the armature unit itself has a permanent magnet unit in the context of the electromagnetic adjustment, which advantageously performs an advancing movement of the armature unit (and actuating unit) by energizing the coil unit. This movement of the permanent magnet unit in the armature unit can then be determined in a very simple manner by the magnetic field sensor, in particular if it is provided adjacent to the permanent magnet unit and a change of the permanent magnetic field can be detected thereby (variable in movement).
Ergänzend oder alternativ ist im Rahmen bevorzugter Ausführungen der Erfindung vorgesehen, dass die Stößeleinheit ganz oder teilweise permanentmagnetisch ausgebildet ist, wobei es in diesem Zusammenhang, jedoch auch bei der Aus- gestaltung eines Permanentmagneten an der Ankereinheit, weiter vorteilhaft ist, eine Verbindung zwischen Stelleinheit (ausgebildet als Stößeleinheit) und Ankereinheit durch permanentmagnetische Haftwirkung zwischen diesen Einheiten lösbar auszugestalten.Additionally or alternatively, it is provided in the context of preferred embodiments of the invention that the ram unit is wholly or partially permanent magnetically, wherein it is in this context, but also in the design of a permanent magnet on the armature unit, further advantageous, a connection between actuator ( designed as a ram unit) and anchor unit Permanent magnetic adhesion between these units releasably designed.
Im Rahmen der Erfindung ist der mindestens eine Magnetfeld- Sensor zur Realisierung der Magnetfeld-Detektionsmittel an einer stationären Position in der Gehäuse- oder Trägereinheit vorgesehen, wobei -- bedeutsam für Fertigung und störungsfreien Betrieb -- es sinnvoll ist, diesen Sensor (ggf. zusammen mit weiteren stationären Aggregaten der Vorrich- tung) in ansonsten bekannter Weise mittels eines polymeren Vergussmaterials oder dergleichen feuchtigkeits- und schmutzgeschützt zu vergießen. Geeignet kann dadurch auch eine (Relativ-) Position der Magnetfeld-Sensoreinheit im Gehäuse fixiert werden, etwa dadurch, dass die Vergussmasse den Sensor ganz oder teilweise umschließt.In the context of the invention, the at least one magnetic field sensor for realizing the magnetic field detection means is provided at a stationary position in the housing or carrier unit, where - meaningful for manufacturing and trouble-free operation - it makes sense to this sensor (possibly together with other stationary aggregates of the device) in a otherwise known manner by means of a polymeric potting material or the like to shed moisture and dirt protected. Suitably, a (relative) position of the magnetic field sensor unit in the housing can also be fixed in this way, for example by virtue of the fact that the potting compound completely or partially encloses the sensor.
Im Rahmen der elektronischen Auswertung ist es dabei einerseits möglich und vorgesehen, eine binäre bzw. digitale Magnetfeld-Detektion durch geeignete Ausgestaltung eines (positionsabhängigen) Schwellwertes vorzunehmen, andererseits ist es im Rahmen bevorzugter Ausführungsformen der Erfindung vorgesehen, entsprechend verschiedene detektier- bare axiale oder radiale Parameter eines Permanentmagnetfeldes geeignet und bevorzugt kontinuierlich auszuwerten, so dass etwa eine vollständige Verfolgung des von der Ankereinheit (bzw. der Stelleinheit) beschriebenen axialen Weges möglich ist.In the context of electronic evaluation, it is both possible and intended to perform a binary or digital magnetic field detection by suitable design of a (position-dependent) threshold, on the other hand, it is provided in the context of preferred embodiments of the invention, correspondingly different detectable axial or radial Suitable parameters of a permanent magnetic field suitable and preferably continuously, so that, for example, a complete tracking of the axial path described by the armature unit (or the actuator unit) is possible.
Im Rahmen bevorzugter Ausführungsbeispiele liegt es dabei einerseits, bei der Verwendung einer Mehrzahl von angetriebenen Stößeleinheiten (z.B. im Rahmen einer gemeinsamen Gehäuseeinheit) eine entsprechende Mehrzahl von zugeordneten Sensoreinheiten vorzusehen; alternativ ist es möglich, eine einzige, gemeinsame Sensoreinheit (vorteilhaft etwa asymmetrisch bezogen auf die radiale Anordnung) so auszugestalten, dass durch Beobachtung der jeweiligen Magnetfelder hier eine saubere Diskriminierung erfolgen und gemeinsame Erfassung mit lediglich einer Sensoreinheit möglich ist.In the context of preferred embodiments, it is on the one hand, when using a plurality of driven ram units (eg in the context of a common housing unit) to provide a corresponding plurality of associated sensor units; alternatively it is possible to have a single, common sensor unit (advantageously approximately asymmetrically with respect to the radial arrangement) in such a way that, by observing the respective magnetic fields, clean discrimination takes place and common detection with only one sensor unit is possible.
Weitere Vorteile, Merkmale und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnungen; diese zeigen in:Further advantages, features and details will become apparent from the following description of preferred embodiments and from the drawings; these show in:
Figur 1 : eine Schemaansicht des Aufbaus der elektromagnetischen Nockenwellen-VersteilVorrichtung gemäß einer ersten Ausführungsform mit einer Ankereinheit und einer dieser zugeordneten Stößeleinheit;Figure 1 is a schematic view of the structure of the electromagnetic camshaft adjusting device according to a first embodiment with an anchor unit and a ram unit associated therewith;
Figur 2 eine Vorrichtung analog Figur 1 mit einem Paar von nebeneinander vorgesehenen, separat voneinander bewegbaren Ankereinheiten mit jeweils einer aufsitzenden Stößeleinheit und jeweils einer zugeordneten Sensoreinheit;FIG. 2 shows a device analogous to FIG. 1 with a pair of armature units, which are provided side by side and can be moved separately from each other, each having a seated tappet unit and in each case one associated sensor unit;
Figur 3: eine weitere Ausführungsform analog der Figur 2, jedoch mit einer für beide Ankereinheiten bzw. Stößeleinheiten gemeinsam vorgesehenen Sensoreinheit;FIG. 3 shows a further embodiment analogous to FIG. 2, but with a sensor unit jointly provided for both armature units or tappet units;
Figur 4 eine Schnittansicht senkrecht zur Bewegungs- Längsachse der Anordnung gemäß Figur 3 mit der gezeigten, im Hinblick auf beide Ankerbzw. Stößeleinheiten symmetrisch angeordneten Sensoreinheit; Figur 5 eine Variante der Darstellung gemäß Figur 4 mit asymmetrisch angeordneter Sensoreinheit, d.h. unterschiedlicher radialer Entfernung der Sensoreinheit zu einer Anker- bzw. Stößeleinheit relativ zur anderen Anker- bzw. Stößeleinheit;Figure 4 is a sectional view perpendicular to the longitudinal axis of movement of the arrangement of Figure 3 with the shown, with respect to both Ankerbzw. Plunger units symmetrically arranged sensor unit; FIG. 5 shows a variant of the representation according to FIG. 4 with asymmetrically arranged sensor unit, ie different radial distance of the sensor unit to an armature or ram unit relative to the other armature or ram unit;
Figur 6: einen Längsschnitt durch eine konkrete Realisierungsform der elektromagnetischen Nockenwellen-Verstellvorrichtung zur Realisierung des Schemas der Figur 1;FIG. 6 shows a longitudinal section through a concrete realization form of the electromagnetic camshaft adjusting device for realizing the scheme of FIG. 1;
Figur 7 einen Längsschnitt durch den oberen Gehäuseabschnitt des Ausführungsbeispiels der Figur 6 undFigure 7 shows a longitudinal section through the upper housing portion of the embodiment of Figure 6 and
Figur 8 : eine Perspektivdarstellung eines Ausschnitts aus der Figur 7 zum Verdeutlichen der Drei- dimensionalität .FIG. 8 shows a perspective view of a detail from FIG. 7 for clarifying the three-dimensionality.
Figur 1 verdeutlicht den Aufbau und das Funktionsprinzip der elektromagnetischen Nockenwellen-Verstellvorrichtung gemäß einer ersten Ausführungsform der Erfindung: In einer (nicht gezeigten) Gehäuseeinheit ist eine stationäre Spuleneinheit 10 vorgesehen, welche um einen stationären Kern 12 herum gebildet ist. In diesen stationären Einheiten in axialer Richtung (d.h. Längsrichtung in der Figur 1) bewegbar gelagert ist eine Ankereinheit 14 mit ansitzender Stößeleinheit 16, welche mit ihrem eingriffseitigen Ende 18 in ansonsten bekannter Weise zum Zusammenwirken mit einer Nut od.dgl. einer Nockenwellenverstellung ausgebildet ist. Die Ankereinheit 14 weist eine Permanentmagneteinheit 20 auf, welche in der gezeigten Weise axial magnetisiert und so der Kerneinheit gegenübersteht, dass als Reaktion auf ein Bestromen der Spuleneinheit 10 die Ankereinheit samt ansitzender Stößeleinheit 16 (diese ist entweder fest oder durch Haftkraft der Permanentmagneteinheit 20 lösbar auf der Permanentmagneteinheit gehalten) in axialer RichtungFigure 1 illustrates the structure and operation principle of the electromagnetic camshaft adjusting device according to a first embodiment of the invention: In a (not shown) housing unit, a stationary coil unit 10 is provided, which is formed around a stationary core 12 around. In this stationary units in the axial direction (ie longitudinal direction in Figure 1) movably mounted is an anchor unit 14 with anssitzender ram unit 16, which with its engagement-side end 18 in an otherwise known manner for cooperation with a groove or the like. a camshaft adjustment is formed. The armature unit 14 has a permanent magnet unit 20 which axially magnetises in the manner shown and faces the core unit such that in response to energizing the coil unit 10, the armature unit together anssitzender ram unit 16 (this is either fixed or by adhesive force of the permanent magnet unit 20 solvable the permanent magnet unit held) in the axial direction
(d.h. in der Figur 1 abwärts) bewegt wird.(i.e., down in Figure 1).
Zur Realisierung der Erfindung ist der Permanentmagneteinheit 20 eine stationäre Sensoreinheit 22 (geeignet im in den Figuren nicht gezeigten Gehäuse vorgesehen) zugeordnet, welche das Permanentmagnetfeld detektiert und, geeignet realisiert als Hall-Element, dieses Magnetfeld sowie dessen Änderung durch Bewegung der Ankereinheit 14 erfassen und einer nachfolgenden elektronischen Auswertung zuführen kann.To implement the invention, the permanent magnet unit 20 is associated with a stationary sensor unit 22 (suitable in the housing not shown in the figures), which detects the permanent magnetic field and, suitably realized as a Hall element, detect this magnetic field and its change by movement of the armature unit 14 and a subsequent electronic evaluation can perform.
Vorteilhaft ermöglicht es diese prinzipielle Realisierungs- form, entlang eines geeigneten Bewegungshubs der Ankereinheit 14 ein entsprechend positionsveränderliches Signal zu erzeugen, welches -- vorteilhaft gegenüber etwa dem bekannten Prinzip einer Erfassung einer Induktionsspannung an den Spulenenden der Einheit 10 im unbestromten Zustand — zu jedem Bestromungszeitpunkt der Spuleneinheit 10 eine Positionserfassung durchführen kann sowie die Position erfassen kann, selbst wenn die Ankereinheit sich nicht bewegt, also an einer entsprechenden Position stillsteht.Advantageously, this basic realization form makes it possible to generate a correspondingly positionally variable signal along a suitable movement stroke of the armature unit 14, which is advantageous at approximately the known principle of detecting an induction voltage at the coil ends of the unit 10 in the de-energized state Coil unit 10 can perform a position detection and can detect the position, even if the anchor unit does not move, so stands still at a corresponding position.
Die Darstellung der Figur 1 (wie i.ü. auch der Figuren 2 bis 5) zeigen lediglich das schematische Zusammenwirken zur Realisierung des Grundprinzips der Erfindung; die konkrete Realisierung eines Ausführungsbeispiels ist im Zusammenhang mit den Figuren 6 bis 8 erläutert, ferner wird im Hinblick auf eine günstige Realisierung der in den Figuren 1 bis 5 gezeigten Aktorik auf die offengelegte Schutzrechtsanmeldung DE 20 2008 010 301 der Anmelderin verwiesen, welche im Hinblick auf die Ausgestaltung eines umgebenden Gehäuses, der Kern-, Joch- und Ankereinheit sowie der Spuleneinheit als zur Erfindung gehörig in die vorliegende Anmeldung einbezogen gelten soll.The illustration of Figure 1 (as well as in Figures 2 to 5) show only the schematic interaction for realizing the basic principle of the invention; the concrete realization of an embodiment is related explained with reference to Figures 6 to 8, further with reference to a favorable realization of the actuator shown in Figures 1 to 5 reference is made to the disclosed patent application DE 20 2008 010 301 of the applicant, which in terms of the design of a surrounding housing, the core -, yoke and anchor unit and the coil unit as part of the invention should be included in the present application.
Eine besonders günstige Weiterbildung zeigt das Ausführungsbeispiel der Figur 2, bei welchem (hier in einem gemeinsamen, nicht gezeigten Gehäuse) ein Paar von Aktoren, jeweils bestehend aus Spuleneinheit 10, Kerneinheit 12 sowie Ankereinheiten 14a bzw. 14b nebeneinander vorgesehen ist; gerade im Zusammenhang mit einer Nockenwellenverstellung kommen häufig Vorrichtungen mit zwei Stößeln zur Anwendung, wobei ein erster Stößel 16a verwendet wird, um den Nockenwellen-Verstellmechanismus in eine erste Position zu bewegen und ein achsparallel angetriebener zweiter Stößel 16b verwendet wird, um die Rückstellung in die Ausgangsposition zu bewirken. Aufgrund der häufig restriktiven Bauraumanforderungen ist die exemplarisch und schematisch in Figur 2 gezeigte Anordnung in einem gemeinsamen Gehäuse untergebracht .A particularly advantageous development shows the embodiment of Figure 2, in which (here in a common housing, not shown), a pair of actuators, each consisting of coil unit 10, core unit 12 and anchor units 14a and 14b is provided side by side; especially in the context of a camshaft adjustment devices are often used with two plungers, wherein a first plunger 16a is used to move the camshaft adjustment mechanism in a first position and an axially parallel driven second plunger 16b is used to return to the starting position to effect. Due to the often restrictive space requirements, the arrangement shown by way of example and schematically in FIG. 2 is accommodated in a common housing.
Das Ausführungsbeispiel der Figur 2 zeigt zudem zwei Sensoren 22a bzw. 22b, welche, analog der Darstellung der Figur 1 (insoweit werden auch korrespondierende Bezugszeichen verwendet), einer jeweiligen Ankereinheit bzw. Stößelein- heit zugeordnet sind.The embodiment of Figure 2 also shows two sensors 22a and 22b, which, analogous to the representation of Figure 1 (to that extent also corresponding reference numerals are used), a respective anchor unit or ram unit are assigned.
Die Figur 3 zeigt eine Variante der Realisierungsform der Figur 2 (und es werden wiederum bei vergleichbaren Baugrup- pen entsprechende Bezugszeichen verwendet) . Abweichend zur Realisierung der Figur 2 mit jeweils einer zugeordneten Sensoreinheit 22a bzw. 22b zeigt die Vorrichtung der Figur 3 eine gemeinsame Sensoreinheit 22c, welche, vergleiche die auf der Höhe des Sensors geschnittene Radialschnittdarstellung der Figur 4, annähernd symmetrisch zwischen beiden Ankereinheiten (respektive der jeweiligen Permanentmagneten 20) angeordnet ist, dergestalt, dass ein die gemessene Feldstärke beeinflussender radialer Abstand zu beiden Per- manentmagnetanordnungen 20 in der Schnittebene gleich ist und bei gleicher axialer Position der Ankereinheiten 14a, 14b ein jeweils im Absolutbetrag gleiches Magnetfeld, jedoch in der jeweiligen Richtung divergierendes Magnetfeld, erzeugt .FIG. 3 shows a variant of the realization form of FIG. 2 (and in turn, in the case of comparable assemblies, FIG. pen corresponding reference numerals used). Notwithstanding the realization of Figure 2, each with an associated sensor unit 22a and 22b, the device of Figure 3 shows a common sensor unit 22c, which, compare the cut at the height of the sensor radial section of Figure 4, approximately symmetrical between two anchor units (respectively Permanent magnets 20) is arranged, such that a radial distance influencing the measured field strength is equal to both permanent magnet arrangements 20 in the sectional plane and at the same axial position of the armature units 14a, 14b a magnetic field which is the same in absolute value but divergent in the respective direction Magnetic field generated.
Durch geeignete Auswertung, insbesondere der Magnetfeldrichtungen, ist daher selbst mit einer gemeinsamen (einzigen) Sensoreinheit 22c das zuverlässige Auswerten eines Paares von Anker- bzw. Stößelbewegungen, etwa wie in Figur 2 verdeutlicht, möglich. Eine weitere Alternative, etwa zur verbesserten Unterscheidung der jeweils detektierten Permanentmagnetfelder, wäre dann gemäß Anordnung der Figur 5 (bei ansonsten gleicher Realisierung) die leicht aus der Mittensymmetrie versetzte Anordnung einer gemeinsamen (ein- zigen) Sensorik 22d vorzusehen, welche der Ankereinheit 14a näher steht und insoweit hier ein stärkeres Permanentmagnetsignal empfängt.By suitable evaluation, in particular the magnetic field directions, the reliable evaluation of a pair of armature or plunger movements, as illustrated in FIG. 2, is therefore possible even with a common (single) sensor unit 22c. According to the arrangement of FIG. 5 (with otherwise identical realization), a further alternative, for example for improved differentiation of the respectively detected permanent magnetic fields, would be to provide the arrangement of a common (single) sensor system 22d which is slightly offset from the center symmetry and which is closer to the armature unit 14a and insofar as it receives a stronger permanent magnet signal here.
In Zusammenhang mit den Figuren 6 bis 8 wird nachfolgend eine praktisch-konstruktive Realisierung des Ausführungsbeispiels der Figur 1 beschrieben. Umgeben von einer zylindrischen Gehäuseschale 30 und umspritzt von einem Kunststoff-Vergussmaterial 32 ist eine Spuleneinheit samt Kern- einheit (erkennbar ist lediglich ein planer Endbereich 34, welcher aus der Umspritzung herausragt) vorgesehen; in nicht näher gezeigter Weise ist die Spuleneinheit elektrisch kontaktiert und das Verbindungskabel zur externen Kontaktierung zu einem einstückig ansitzenden Steckerab¬ schnitt 36 geführt.In connection with FIGS. 6 to 8, a practical constructive realization of the exemplary embodiment of FIG. 1 will be described below. Surrounded by a cylindrical housing shell 30 and encapsulated by a plastic potting material 32 is a coil unit together with core unit (recognizable is only a planar end portion 34, which protrudes from the encapsulation) provided; in a manner not shown in more detail, the coil unit is electrically contacted and the connecting cable for external contacting to an integrally ansitzenden Steckerab ¬ section 36 out.
Gezeigt ist ferner, wie eine zylindrische Sensoreinheit 38 so im Gehäuse befestigt ist, dass diese in etwa hälftig vom Vergussmaterial 32 umschlossen ist und mit ihrer (in der Figur 6 unteren) Hälfte in einen Hohlraum 40 im Gehäuse 30 hineinragt. In diesen Hohlraum, axial relativ beweglich zum Kern 34, ragt von der entgegengesetzten Seite eine Ankereinheit 42, welche mittig einen scheibenförmigen Perma- nentmagneten 44 trägt, welcher in der vorbeschriebenen Weise berührungslos mit der Sensoreinheit 38 so zusammenwirkt, dass bei axialer (d.h. in der Figur 6 vertikaler) Bewegung der Ankereinheit die stationäre Sensoreinheit 38 ein sich änderndes Permanentmagnetfeld detektiert und dieses (in nicht näher gezeigter Weise) einer nachfolgenden elektronischen Verarbeitung zuführt.Shown is also how a cylindrical sensor unit 38 is mounted in the housing so that it is enclosed in about half of the potting material 32 and protrudes with its (in the figure 6 lower) half in a cavity 40 in the housing 30. In this cavity, axially relatively movable to the core 34, protrudes from the opposite side of an armature unit 42 which centrally carries a disc-shaped permanent magnets 44, which in the manner described above without contact with the sensor unit 38 cooperates so that in axial (ie Figure 6 vertical) movement of the armature unit, the stationary sensor unit 38 detects a changing permanent magnetic field and this (not shown in detail) feeds a subsequent electronic processing.
Das Gehäuse 30 ist bodenseitig abgeschlossen mit einem Endstück 46, in welchem eine Stößeleinheit 48 geführt ist; diese kontaktiert einends (im oberen Ende) die Ankereinheit 42 bzw. ist Teil dieser, im entgegengesetzten Endbereich wird der Nockenwellen-Verstell-Eingriffsbereich 18 ausgebildet. Kanäle 50 im Bodenstück 46 dienen der Entlüftung und eine umlaufende Radialdichtung 52 der Abdichtung gegen- über einem aufnehmenden Gehäuse des Stellpartners, z.B. dem Nockenwellen-Gehäuse . Die Figur 8 verdeutlicht in diesem Zusammenhang noch einmal günstig, wie die Vergussmasse 32 in der Gehäuseschale 30 vorgesehen ist und die Sensoreinheit 38 zuverlässig, schmutzgeschützt und leicht montierbar an ihrer Relativpo- sition zum Permanentmagneten 44 bzw. zur Ankereinheit 42 hält.The housing 30 is closed on the bottom side with an end piece 46, in which a ram unit 48 is guided; this contacts at one end (in the upper end) the armature unit 42 or is part of this, in the opposite end region of the camshaft adjusting engagement portion 18 is formed. Channels 50 in the bottom piece 46 serve for venting and a circumferential radial seal 52 of the seal against a receiving housing of the control partner, eg the camshaft housing. FIG. 8 once again illustrates in a favorable manner how the potting compound 32 is provided in the housing shell 30 and the sensor unit 38 holds reliably, dirt-protected and easily mountable at its relative position to the permanent magnet 44 or to the anchor unit 42.
Die vorliegende Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt. So ist es zwar günstig, für die Sensoreinheit ein übliches Permanentmagnet- Detektorprinzip (Hall, GMR oder AMR) anzuwenden, es sind jedoch auch andere magnetische Detektionsmöglichkeiten denkbar .The present invention is not limited to the described embodiments. Although it is favorable to use a conventional permanent magnet detector principle (Hall, GMR or AMR) for the sensor unit, other magnetic detection options are also conceivable.
Auch ist die vorliegende Erfindung günstig als Nockenwellen-Verstellvorrichtung, jedoch das Prinzip einer elektromagnetischen Aktorik, insbesondere in Verbindung mit einem Permanentmagneten am Anker und einer stationären Magnet- feld-Detektion dieses Ankers, eignet sich für prinzipiell beliebige Stellaufgaben, welche in der beschriebenen Weise vorteilhaft und für beliebige Betriebssituationen eine zuverlässige Detektion der Anker- bzw. Stößelposition benötigen. The present invention is also favorable as a camshaft adjustment device, but the principle of electromagnetic actuators, in particular in conjunction with a permanent magnet at the armature and a stationary magnetic field detection of this armature, is suitable for basically any control tasks which are advantageous in the manner described and need reliable detection of the armature or plunger position for any operating situations.

Claims

Ansprüche claims
1. Elektromagnetische Nockenwellen-Verstellvorrichtung mit einer als Reaktion auf eine Bestromung einer stationären Spuleneinheit (10) entlang einer axialen Richtung antreibbaren Ankereinheit (14; 42), die zum Zusammenwirken mit einer eine Nockenwellenverstellung eines Verbrennungsmotors bewirkenden Stelleinheit (16; 48), insbesondere sich in der a- xialen Richtung ersteckenden Schieber- und/oder Stößeleinheit, ausgebildet ist, wobei an und/oder in der Ankereinheit und/oder der Stelleinheit Permanentmagnetmittel (20; 44) vorge- sehen sind und die Spuleneinheit und die Ankereinheit zumindest teilweise in einer Gehäuse- oder Trägereinheit aufgenommen sind, dadurch gekennzeichnet, dass der Trägereinheit zum bevorzugt berührungslosen magnetischen Zusammenwirken mit den Permanentmagnetmitteln ausgebildete stationäre Magnetfeld-Detektionsmittel (22; 38) zugeordnet und so ausgebildet sind, dass in einem Bestromungs- sowie Nicht-Bestromungszustand der Spuleneinheit durch Auswertung eines Magnetfeld- Detektionssignals der Magnetfeld-Detektionsmittel eine axiale Position der Ankereinheit und/oder der Stelleinheit elektronisch ermittelbar ist.An electromagnetic camshaft adjusting device having an armature unit (14, 42) which can be driven along an axial direction in response to an energization of a stationary coil unit (10) and which interacts with a control unit (16, 48) which effects camshaft adjustment of an internal combustion engine in the axial direction erstickenden slide and / or tappet unit is formed, wherein on and / or in the armature unit and / or the setting unit permanent magnet means (20; 44) are provided and the coil unit and the anchor unit at least partially in one Housing or carrier unit are recorded, characterized in that the carrier unit for preferably non-contact magnetic interaction with the permanent magnet means formed stationary magnetic field detection means (22; 38) are assigned and designed so that in a Bestromungs- and non-Bestromungszustand the coil unit by evaluation one it is electronically detectable magnetic field detection signal of the magnetic field detection means an axial position of the armature unit and / or the actuator.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Ankereinheit eine Permanentmagneteinheit aufweist. 2. Device according to claim 1, characterized in that the anchor unit comprises a permanent magnet unit.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Permanentmagneteinheit durch die Bestromung die Ankereinheit durch magnetische Abstoßungswirkung antreibt.3. A device according to claim 2, characterized in that the permanent magnet unit drives the armature unit by magnetic current through the magnetic repulsion effect.
4. Vorrichtung nach einen der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die als Stößeleinheit4. Device according to one of claims 1 to 3, characterized in that the as a ram unit
(16) ausgebildete Stelleinheit durch eine permanentmagnetische Haltekraft lösbar an der Ankerein- heit gehalten ist.(16) trained actuating unit is held by a permanent magnetic holding force releasably on the Ankerein- unit.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die als Stößeleinheit realisierte Stelleinheit eine permanentmagnetische Magnetisierung aufweist.5. Device according to one of claims 1 to 4, characterized in that the actuating unit realized as a ram unit has a permanent magnetic magnetization.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die einen Magnetfeld- Sensor aufweisenden Magnetfeld-Detektionsmittel (38) stationär in der Gehäuse- oder Trägereinheit der Ankereinheit benachbart vorgesehen sind.6. Device according to one of claims 1 to 5, characterized in that the magnetic field sensor having a magnetic field detection means (38) are provided adjacent stationary in the housing or support unit of the anchor unit.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der Magnetfeld-Sensor von einem in der Gehäuse- bzw. Trägereinheit vorgesehenen, insbesondere polymeren Aus- bzw. Umspritzung (32) zumindest teilweise umschlossen ist.7. The device according to claim 6, characterized in that the magnetic field sensor is provided by a provided in the housing or support unit, in particular polymeric Aus or extrusion coating (32) is at least partially enclosed.
8. Vorrichtung nach einem der Ansprüche 1 bis 7, da- durch gekennzeichnet, dass die Magnetfeld-8. Device according to one of claims 1 to 7, characterized in that the magnetic field
Detektionsmittel einen als Hall-Sensor, GMR-Sensor oder AMR-Sensor ausgebildeten Magnetfeld-Sensor aufweisen. Have detection means designed as a Hall sensor, GMR sensor or AMR sensor magnetic field sensor.
9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Magnetfeld- Detektionsmittel zum Erzeugen eines binären und/oder digitalen, einer schwellenartig ausgewerteten axialen Position der Ankereinheit bzw. der Stelleinheit entsprechenden Magnetfeld-Detektions- signals ausgebildet sind.9. Device according to one of claims 1 to 8, characterized in that the magnetic field detection means for generating a binary and / or digital, a threshold-like evaluated axial position of the armature unit or the adjusting unit corresponding magnetic field detection signal are formed.
10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Magnetfeld- Detektionsmittel zum Ausgeben eines elektronischen Magnetfeld-Detektionssignals ausgebildet sind, welches einer detektierten Feldstärke der Permanent- magnetmittel, eines Polaritätswechsels des Magnetfeldes der Permanentmagnetmittel in radialer Richtung, eines Polaritätswechsels des Magnetfelds der Permanentmagnetmittel in axialer Richtung und/oder einer Magnetfeldrichtungsänderung des Magnetfeldes der Permanentmagnetmittel entspricht.10. Device according to one of claims 1 to 9, characterized in that the magnetic field detection means are designed for outputting an electronic magnetic field detection signal which a detected field strength of the permanent magnet means, a polarity change of the magnetic field of the permanent magnet means in the radial direction, a polarity change the magnetic field of the permanent magnet means in the axial direction and / or a magnetic field direction change of the magnetic field of the permanent magnet means corresponds.
11. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass in der Gehäuse- bzw. Trägereinheit eine Mehrzahl bevorzugt unabhängig voneinander antreibbarer Anker- und/oder Stelleinheiten (14a, 14b) vorgesehen ist.11. Device according to one of claims 1 to 10, characterized in that in the housing or carrier unit a plurality of preferably independently drivable armature and / or actuating units (14a, 14b) is provided.
12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass der Mehrzahl der Anker- und/oder Stell- einheiten in einem gemeinsamen Magnetfeld- Erfassungsbereich der Permanentmagnetmittel eine einzelne Sensoreinheit (22c; 22d) als Magnetfeld- Detektionsmittel zugeordnet ist. 12. The device according to claim 11, characterized in that the plurality of armature and / or adjusting units in a common magnetic field detection area of the permanent magnet means a single sensor unit (22c, 22d) is assigned as a magnetic field detection means.
13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass der einzelne Magnetfeld-Sensor (22d) in einer radialen Ebene senkrecht zu der axialen Rich- tung in einer unsymmetrischen Relativposition zwischen mindestens zwei Ankereinheiten und/oder Stelleinheiten stationär vorgesehen ist.13. The device according to claim 12, characterized in that the single magnetic field sensor (22d) is stationary in a radial plane perpendicular to the axial direction in an asymmetrical relative position between at least two anchor units and / or adjusting units.
14. Vorrichtung nach Anspruch 11, dadurch gekennzeich- net, dass der Mehrzahl der Ankereinheiten bzw.14. Device according to claim 11, characterized in that the plurality of anchor units or
Stelleinheiten eine bevorzugt entsprechende Mehrzahl von Magnetfeld-Sensoren (22a, 22b) als Magnet- feld-Detektionsmittel in der Gehäuse- bzw. Trägereinheit zugeordnet ist. Actuators a preferably corresponding plurality of magnetic field sensors (22a, 22b) is assigned as a magnetic field detection means in the housing or carrier unit.
EP10719727A 2009-04-16 2010-03-31 Electromagnetic camshaft-adjuster device Active EP2352910B1 (en)

Applications Claiming Priority (2)

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DE202009006940U DE202009006940U1 (en) 2009-04-16 2009-04-16 Electromagnetic camshaft adjusting device
PCT/EP2010/002041 WO2010118826A1 (en) 2009-04-16 2010-03-31 Electromagnetic camshaft-adjuster device

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EP2352910A1 true EP2352910A1 (en) 2011-08-10
EP2352910B1 EP2352910B1 (en) 2012-02-15

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EP (1) EP2352910B1 (en)
CN (1) CN102395762B (en)
AT (1) ATE545771T1 (en)
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ATE545771T1 (en) 2012-03-15
US8448615B2 (en) 2013-05-28
EP2352910B1 (en) 2012-02-15
WO2010118826A1 (en) 2010-10-21
US20120031360A1 (en) 2012-02-09
CN102395762A (en) 2012-03-28
CN102395762B (en) 2014-06-18
DE202009006940U1 (en) 2010-09-02

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