EP3350421A1 - Variable valve control device for internal combustion engines - Google Patents

Variable valve control device for internal combustion engines

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Publication number
EP3350421A1
EP3350421A1 EP16770876.7A EP16770876A EP3350421A1 EP 3350421 A1 EP3350421 A1 EP 3350421A1 EP 16770876 A EP16770876 A EP 16770876A EP 3350421 A1 EP3350421 A1 EP 3350421A1
Authority
EP
European Patent Office
Prior art keywords
control
camshaft
cam
control device
valve
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
EP16770876.7A
Other languages
German (de)
French (fr)
Other versions
EP3350421B1 (en
Inventor
Christian Hubmann
Helmut Melde-Tuczai
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.)
AVL List GmbH
Original Assignee
AVL List GmbH
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Filing date
Publication date
Application filed by AVL List GmbH filed Critical AVL List GmbH
Publication of EP3350421A1 publication Critical patent/EP3350421A1/en
Application granted granted Critical
Publication of EP3350421B1 publication Critical patent/EP3350421B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • 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

  • the invention relates to a variable valve control device for internal combustion engines of Hubkolbenbauart with at least one gas exchange valve which is actuated by means of a rotatably mounted about a camshaft axis via a cam rotatably connected to the camshaft, at least two different cam tracks cam device, wherein by means of a control device optionally one of the cam tracks activated and at least one other cam track is deactivatable, and wherein the control device has at least one axially guided in particular within the camshaft actuator of which by means of at least one driving piece at least one rotatably but axially displaceably mounted on the camshaft, at least two different cam tracks having cam device is adjustable.
  • a valve train of an internal combustion engine in which a cam is rotated with different cam tracks of a camshaft.
  • the cam can be moved axially on the camshaft to realize different valve lifts.
  • the adjustment required for the displacement is arranged in the interior of the camshaft.
  • the movement of the adjusting member is transmitted to the axially displaceable cam via a spring element, which is also guided in the interior of the camshaft. Since the axial displacement of the cam is possible in virtually every rotational position of the camshaft, damage to the cam tracks or transmission devices can not be excluded.
  • DE 199 08 286 A1 describes a variable valve control device for internal combustion engines, which comprises valves for gas exchange control, which are actuated by means of a camshaft.
  • the camshaft has an actuator shaft with an actuator and relatively movable cam devices. Each cam device is mounted axially movable on the stator shaft. Between the cam device and the actuator shaft, a spring device is provided, which seeks to move the cam device in the home position.
  • the cam device cooperates with a triggering device which is provided with a fixedly mounted on the actuator shaft control ring and a radially arranged to the actuator shaft locking pin.
  • the control ring has a control cam, which is in operative connection with a compression spring locking pin has a control projection.
  • the control cam engages under the control projection in response to an axial position and a radial position of the actuator shaft and lifts after a partial rotation of the actuator shaft to the locking pin, whereby the cam device performs an axial movement in a defined operating position.
  • the spring device holds the cam device in a basic position, from which the actuator shaft moves this cam device as a function of parameters of the internal combustion engine in a defined operating position.
  • the functionally correct movement of the cam device ensuring release device is only effective when the actuator shaft is in defined position settings.
  • the disadvantage is that an additional control effort is necessary for the operation of the triggering device.
  • the object of the invention is to avoid the disadvantages mentioned and to enable the simplest possible way a reliable and fail-safe variable valve actuation.
  • the blocking element for blocking or releasing the axial adjusting movement of the cam device, the blocking element having a control pin fixedly connected to the cam device and a control disk arranged coaxially with the camshaft, preferably fixed, the control disk has at least one control opening for receiving the control pin in at least one angular range.
  • the control disk can be arranged fixed to the housing.
  • the blocking or release of the displaced movement of the cam device is purely mechanical by the arrangement of the control opening on the control disk and the interaction of the control pin with the control port. This can be dispensed with a complex control.
  • the invention has the advantage over the prior art known from DE 199 08 286 A1 that parts and installation space can be saved.
  • control pin is radially projecting on the cam device, preferably arranged on an outer jacket of the cam device.
  • the control pin is fixed, ie immovable, connected to the cam device, and projecting radially outwardly provided on the outer jacket of the cam device.
  • the control pin can for example be pressed into a radial bore of the cam device, glued or screwed.
  • control opening is arranged in a wall of the control disk facing the cam device, which is formed, for example, normally normal to the axis of rotation of the camshaft.
  • a simple production of the control opening is possible if this is designed as a wall breakthrough.
  • the control opening can-viewed in the frontal view-have substantially the shape of a circular segment or a circular ring segment, it being particularly advantageous if the control opening extends over an angular range of at least 60 °, preferably at least 90 °.
  • control disk is exposed on both sides of the wall. This prevents collisions of the locking pin with adjacent elements.
  • control opening and the control pin are arranged relative to each other in such angular ranges of the control disk or the camshaft, that the cam device is adjustable only in valve hubleless state, preferably the base circles of the cam tracks a Hubübertragungselement facing.
  • FIG. 1 shows a variable valve control device according to the invention in an oblique view in a longitudinal section in a first displacement position.
  • valve control device in a longitudinal section in the first
  • valve control device in another oblique view in the first displacement position.
  • valve control device 4 shows the valve control device in a further oblique view in the first displacement position
  • valve control device in an oblique view in one
  • valve control device in a longitudinal section in the second displacement position.
  • FIG. 7 shows the valve control device in another oblique view in the second displacement position
  • valve control device 8 shows the valve control device in a further oblique view in the second displacement position
  • valve control device in a side view.
  • the figures show a variable valve timing device 1 for internal combustion engines with at least one rotatably mounted about a camshaft axis 2 camshaft 3, wherein a cam device 4 with at least two cams 5, 6 and cam tracks 7, 8 with the camshaft 3 rotatably, but axially slidably connected.
  • the cam device 4 acts on a transmission element 30 of a stroke transmission device 31, for example a valve lever, designed as a roller body, which stroke transmission device 31 actuates at least one gas exchange valve of the internal combustion engine which is not further illustrated in the figures.
  • one of the cam tracks 7, 8 can be activated or deactivated via a control device 10.
  • the control device 10 has at least one axially guided within the camshaft 3 actuator 11, with which a formed by a radial pin driving piece 12 is firmly connected.
  • the actuator 11 is formed as a piston, which is guided in a coaxial with the camshaft axis 2 arranged guide cylinder 13 of the camshaft 3 longitudinally displaceable.
  • the driving piece 12 penetrates in the radial direction a slot 16 of the camshaft 3 and is embedded in a radially extending bore 17 of the cam device 4.
  • the cam device 4 is thus connected via the driving piece 12 with the actuator 11, so that the axial displacement movement of the actuator 11 is transferred between a first displacement position and a second displacement position on the cam device 4.
  • either the first cam 5 or the second cam 6 of the cam device 4 can be selectively activated by bringing the first cam track 7 and the second cam track 8 into engagement with the transmission element 30 of the stroke transmission device 31.
  • the displacement of the cam device 4 can be carried out with minimal expenditure of force in the valve-lift-free state, that is to say when the base circles 7a, 8a of the cam tracks 7, 8 face the transmission element 30 of the stroke transmission device 31.
  • a blocking element 20 is provided.
  • the locking member 20 has a fixedly connected to the cam device 3 control pin 21 and a coaxial with the camshaft 3 arranged housing-fixed control disk 22.
  • the control pin 21 is radially projecting from a cylindrical outer shell 18 of the cam device 4.
  • the control disk 22 has on the cam device 4 side facing a normal to the camshaft axis 2 arranged or extending wall 23, in which a wall opening 24 is formed.
  • the wall opening 24 formed in the exemplary embodiment as a circular ring segment forms a control opening 25 corresponding to the control pin 21 and extends over the camshaft axis 2 over a defined angular range ⁇ , wherein in the exemplary embodiment the angular range ⁇ is approximately 130 ° (FIG. 9).
  • control opening 25 and the control pin 21 are arranged relative to each other in such angular ranges of the control disk 22 and the camshaft 3 that the cam device 4 is adjustable only in a valve-free state, ie when the base circles 7a, 8a of the cam tracks 7, 8 of the stroke transmission device 31 are facing.
  • the wall 23 has a thickness b which substantially corresponds to the thickness d of the control pin 21 - measured in the direction of the camshaft axis 2.
  • the control disk 22 is free on both sides of the wall 23, so that an unobstructed rotation of the control pin 21 about the camshaft axis 2 is possible.
  • FIGS. 1 and 2 show the cam device 4 in a first displacement position, wherein the first cam 5 with the first cam track 7 is activated.
  • the actuator 11 is pressed by the actuator 14 in Figs. 1 and Fig. 2 to the left, ie in a direction away from the blocking member 20 direction.
  • the basic circuits 7a, 8a face the transmission element 30 of the stroke transmission device.
  • the control pin 21 is located in the region of the control opening 25, so that the axial adjustment movement of the cam device 4 through the locking member 20 - according to the activation of the actuator 14 - is released.
  • FIGS. 3 and 4 likewise show the cam device 4 in the first displacement position, the first cam 5 with the first cam track 7 being activated.
  • the cam 5 is here but in its stroke position - an axial adjustment of the cam device 4 would be undesirable here.
  • the axial adjustment in this camshaft position is blocked by the locking member 20 by the control pin 21 moves to the wall 23 of the control disk 22. It can clearly be seen in FIGS. 3 and 4 that the control pin 21 is in its lower position, which is diametrically opposite the control opening 25 with respect to the camshaft axis 2, and thus bears against the wall 23.
  • the cam device 4 is in a second displacement position, the second cam 6 with the second cam track 8 being activated.
  • the actuator 11 is pressed by the arranged within the camshaft 3 restoring spring 15 with deactivated actuator 14 in Figs. 5 and Fig. 6 to the right, ie in the direction of the locking member 20.
  • the basic circuits 7a, 8a here too face the transmission element 30 of the stroke transmission device.
  • the control pin 21 is thus located in the region of the control opening 25, so that the axial adjustment cam device 4 through the locking member 20 - according to the activation of the actuator 14 - is released.
  • the cam device 4 is still in its second displaced position - yet or already initiating a valve lift of the corresponding gas exchange valve, although the adjustment movement of the cam advancer is still in its second displacement position.
  • direction 4 locked by the actuator 14 in the first displacement position by the locking member 20, since the locking pin 21 is outside the control opening 25 and thus rests against the wall 23. Only when the control pin 21 is rotated by the camshaft 3 in an upper position seen in the figures and - viewed in a projection in the direction of the camshaft axis 2 - within the control opening 25, the adjusting movement is released from the second to the first displacement position ,
  • the blocking member 20 allows easy activation of the activator 14, since it can be activated or deactivated independently of the respective rotational position of the camshaft 3.

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

Abstract

The invention relates to a variable valve control device (1) for internal combustion engines of the reciprocating-piston design having at least one gas exchange valve, which can be actuated by a camshaft (3) by means of a cam device (4) that is connected to the camshaft (3) for conjoint rotation and that has at least two different cam tracks (7, 8), which camshaft is supported in such a way that the camshaft can be rotated about a camshaft axis (2), wherein, selectively, one of the cam tracks (7, 8) can be activated and at least one other cam track (8, 7) can be deactivated by means of a control device (10), and wherein the control device (10) has at least one control element (11), which is guided axially, in particular within the camshaft, and by which at least one cam device (4) that is supported on the camshaft (3) for conjoint rotation but axially movably and that has at least two different cam tracks (7, 8) can be adjusted by means of at least one driving piece (12). In order to enable reliable and fail-safe variable valve actuation in the simplest possible manner, at least one blocking element (20) is provided for blocking and releasing the axial adjustment motion of the cam device (4), wherein the blocking element (20) has a control stud (21) fixedly connected to the cam device (4) and a - preferably stationary - control disk (22) arranged coaxial to the camshaft (3), wherein the control disk (22) has, in at least one angular region, at least one control opening (25) for receiving the control stud (21).

Description

Variable Ventilsteuerungseinrichtung für Brennkraftmaschinen  Variable valve control device for internal combustion engines
Die Erfindung betrifft eine variable Ventilsteuerungseinrichtung für Brennkraftmaschinen der Hubkolbenbauart mit zumindest einem Gaswechselventil, das mittels einer drehbar um eine Nockenwellenachse gelagerten Nockenwelle über eine drehfest mit der Nockenwelle verbundene, zumindest zwei unterschiedliche Nockenbahnen aufweisende Nockenvorrichtung betätigbar ist, wobei mittels einer Steuereinrichtung wahlweise eine der Nockenbahnen aktivierbar und zumindest eine andere Nockenbahn deaktivierbar ist, und wobei die Steuerungseinrichtung zumindest ein axial insbesondere innerhalb der Nockenwelle geführtes Stellorgan aufweist, von welchem mittels zumindest eines Mitnahmestücks mindestens eine drehfest aber axial verschiebbar auf der Nockenwelle gelagerte, zumindest zwei unterschiedlichen Nockenbahnen aufweisende Nockenvorrichtung verstellbar ist. The invention relates to a variable valve control device for internal combustion engines of Hubkolbenbauart with at least one gas exchange valve which is actuated by means of a rotatably mounted about a camshaft axis via a cam rotatably connected to the camshaft, at least two different cam tracks cam device, wherein by means of a control device optionally one of the cam tracks activated and at least one other cam track is deactivatable, and wherein the control device has at least one axially guided in particular within the camshaft actuator of which by means of at least one driving piece at least one rotatably but axially displaceably mounted on the camshaft, at least two different cam tracks having cam device is adjustable.
Aus der DE 100 9520 117 AI ist ein Ventiltrieb einer Brennkraftmaschine bekannt, bei dem ein Nocken mit unterschiedlichen Nockenbahnen von einer Nockenwelle verdreht wird. Der Nocken kann dabei zur Realisierung unterschiedlicher Ventilerhebungen axial auf der Nockenwelle verschoben werden. Das für die Verschiebung erforderliche Verstellorgan ist im Inneren der Nockenwelle angeordnet. Die Bewegung des Verstellorgans wird über ein Federelement, das ebenfalls im Inneren der Nockenwelle geführt ist, auf den axial verschiebbaren Nocken übertragen. Da die axiale Verschiebung des Nockens praktisch in jeder Drehwinkellage der Nockenwelle möglich ist, können Schäden an den Nockenbahnen oder Übertragungseinrichtungen nicht ausgeschlossen werden. From DE 100 9520 117 AI a valve train of an internal combustion engine is known, in which a cam is rotated with different cam tracks of a camshaft. The cam can be moved axially on the camshaft to realize different valve lifts. The adjustment required for the displacement is arranged in the interior of the camshaft. The movement of the adjusting member is transmitted to the axially displaceable cam via a spring element, which is also guided in the interior of the camshaft. Since the axial displacement of the cam is possible in virtually every rotational position of the camshaft, damage to the cam tracks or transmission devices can not be excluded.
Die DE 199 08 286 AI beschreibt eine variable Ventilsteuerungseinrichtung für Brennkraftmaschinen, welche Ventile zur Gaswechselsteuerung umfasst, die mittels einer Nockenwelle betätigt werden. Die Nockenwelle weist eine Stellerwelle mit einer Betätigungseinrichtung und relativ bewegliche Nockenvorrichtungen auf. Jede Nockenvorrichtung ist axial beweglich auf der Ständerwelle gelagert. Zwischen der Nockenvorrichtung und der Stellerwelle ist eine Federvorrichtung vorgesehen, die die Nockenvorrichtung in Grundstellung zu bewegen sucht. Die Nockenvorrichtung arbeitet mit einer Auslöseeinrichtung zusammen, die mit einem fest auf der Stellerwelle angebrachten Steuerring und einem radial zur Stellerwelle angeordneten Sperrbolzen versehen ist. Der Steuerring weist einen Steuernocken, der mit einer Druckfeder in Wirkverbindung stehende Sperrbolzen weist einen Steuervorsprung auf. Der Steuernocken untergreift den Steuervorsprung in Abhängigkeit einer axialen Stellung und einer radialen Stellung der Stellerwelle und hebt nach einer Teildrehung der Stellerwelle den Sperrbolzen an, wodurch die Nockenvorrichtung eine Axialbewegung in eine definierte Betriebsstellung ausführt. Dabei hält die Federvorrichtung die Nockenvorrichtung in einer Grundstellung, von der aus die Stellerwelle diese Nockenvorrichtung in Abhängigkeit von Parametern der Brennkraftmaschine in eine definierte Betriebsstellung bewegt. Die eine funktionsgerechte Bewegung der Nockenvorrichtung sicherstellende Auslöseeinrichtung wird erst dann wirksam, wenn sich die Stellerwelle in definierten Stellerstellungen befindet. Nachteilig ist, dass für die Betätigung der Auslöseeinrichtung ein zusätzlicher Steuerungsaufwand notwendig ist. DE 199 08 286 A1 describes a variable valve control device for internal combustion engines, which comprises valves for gas exchange control, which are actuated by means of a camshaft. The camshaft has an actuator shaft with an actuator and relatively movable cam devices. Each cam device is mounted axially movable on the stator shaft. Between the cam device and the actuator shaft, a spring device is provided, which seeks to move the cam device in the home position. The cam device cooperates with a triggering device which is provided with a fixedly mounted on the actuator shaft control ring and a radially arranged to the actuator shaft locking pin. The control ring has a control cam, which is in operative connection with a compression spring locking pin has a control projection. The control cam engages under the control projection in response to an axial position and a radial position of the actuator shaft and lifts after a partial rotation of the actuator shaft to the locking pin, whereby the cam device performs an axial movement in a defined operating position. In this case, the spring device holds the cam device in a basic position, from which the actuator shaft moves this cam device as a function of parameters of the internal combustion engine in a defined operating position. The functionally correct movement of the cam device ensuring release device is only effective when the actuator shaft is in defined position settings. The disadvantage is that an additional control effort is necessary for the operation of the triggering device.
Aufgabe der Erfindung ist es, die genannten Nachteile zu vermeiden und auf möglichst einfache Weise eine zuverlässige und ausfallsichere variable Ventilbetätigung zu ermöglichen. The object of the invention is to avoid the disadvantages mentioned and to enable the simplest possible way a reliable and fail-safe variable valve actuation.
Erfindungsgemäß wird dies dadurch erreicht, dass zum Sperren bzw. zur Freigabe der axialen Verstellbewegung der Nockenvorrichtung zumindest ein Sperrorgan vorgesehen ist, wobei das Sperrorgan einen mit der Nockenvorrichtung fest verbundenen Steuerzapfen und eine koaxial zur Nockenwelle angeordnete - vorzugsweise feststehende - Steuerscheibe aufweist, wobei die Steuerscheibe in zumindest einem Winkelbereich zumindest eine Steueröffnung zur Aufnahme des Steuerzapfen aufweist. This is achieved according to the invention by providing at least one blocking element for blocking or releasing the axial adjusting movement of the cam device, the blocking element having a control pin fixedly connected to the cam device and a control disk arranged coaxially with the camshaft, preferably fixed, the control disk has at least one control opening for receiving the control pin in at least one angular range.
Die Steuerscheibe kann dabei gehäusefest angeordnet sein. Die Sperrung bzw. Freigabe der verstellten Bewegung der Nockenvorrichtung erfolgt rein mechanisch durch die Anordnung der Steueröffnung auf der Steuerscheibe und das Zusammenwirken des Steuerzapfens mit der Steueröffnung. Dadurch kann auf eine aufwändige Steuerung verzichtet werden. Die Erfindung hat darüber hinaus - verglichen mit dem aus der DE 199 08 286 AI bekannten Stand der Technik - den Vorteil, dass Teile und Bauraum eingespart werden können. The control disk can be arranged fixed to the housing. The blocking or release of the displaced movement of the cam device is purely mechanical by the arrangement of the control opening on the control disk and the interaction of the control pin with the control port. This can be dispensed with a complex control. In addition, the invention has the advantage over the prior art known from DE 199 08 286 A1 that parts and installation space can be saved.
Günstigerweise ist der Steuerzapfen radial vorspringend auf der Nockenvorrichtung, vorzugsweise auf einem Außenmantel der Nockenvorrichtung, angeordnet. Der Steuerzapfen ist fest, also unverschiebbar, mit der Nockenvorrichtung verbunden, und radial nach außen vorspringend am Außenmantel der Nockenvorrichtung vorgesehen. Der Steuerzapfen kann dabei beispielsweise in eine radiale Bohrung der Nockenvorrichtung eingepresst, eingeklebt oder eingeschraubt sein. Conveniently, the control pin is radially projecting on the cam device, preferably arranged on an outer jacket of the cam device. The control pin is fixed, ie immovable, connected to the cam device, and projecting radially outwardly provided on the outer jacket of the cam device. The control pin can for example be pressed into a radial bore of the cam device, glued or screwed.
In einer bevorzugten Ausführungsvariante der Erfindung ist vorgesehen, dass die Steueröffnung in einer der Nockenvorrichtung zugewandten Wand der Steuerscheibe angeordnet ist, welche beispielsweise normal zur Drehachse der Nockenwelle ausgebildet ist. Eine einfache Fertigung der Steueröffnung ist möglich, wenn diese als Wanddurchbruch ausgeführt ist. Die Steueröffnung kann -in stirnseitigen Ansicht betrachtet - im Wesentlichen die Form eines Kreissegmentes oder eines Kreisringsegmentes aufweisen, wobei es besonders vorteilhaft ist, wenn sich die Steueröffnung über einen Winkelbereich von zumindest 60°, vorzugsweise von zumindest 90°, erstreckt. Dadurch ist eine ungehinderte axiale Verschiebung des Steuerzapfens in die Steueröffnung möglich, ohne dass es zu einer Kollision des Steuerzapfen mit dem Rand der Steuerscheibe kommt. Somit können Beschädigungen Steuerzapfen und der Steuerscheibe verhindert werden. In a preferred embodiment of the invention, it is provided that the control opening is arranged in a wall of the control disk facing the cam device, which is formed, for example, normally normal to the axis of rotation of the camshaft. A simple production of the control opening is possible if this is designed as a wall breakthrough. The control opening can-viewed in the frontal view-have substantially the shape of a circular segment or a circular ring segment, it being particularly advantageous if the control opening extends over an angular range of at least 60 °, preferably at least 90 °. As a result, unimpeded axial displacement of the control pin in the control port is possible without causing a collision of the control pin with the edge of the control disk. Thus, damage control pin and the control disc can be prevented.
Weiters ist es für eine unbehinderte axiale Verschiebung des Steuerzapfens günstig, wenn die Wand der Steuerscheibe eine Dicke aufweist, die im Wesentlichen der Stärke des Steuerzapfens - in Richtung der Nockenwellenachse gemessen - entspricht. Furthermore, it is favorable for an unobstructed axial displacement of the control pin when the wall of the control disk has a thickness which substantially corresponds to the thickness of the control pin - measured in the direction of the camshaft axis.
Um eine unbehinderte Drehung der Nockenvorrichtung zu ermöglichen, ist es vorteilhaft, wenn die Steuerscheibe beidseits der Wand frei gestellt ist. Dies verhindert Kollisionen des Sperrzapfens mit angrenzenden Elementen. In order to enable an unobstructed rotation of the cam device, it is advantageous if the control disk is exposed on both sides of the wall. This prevents collisions of the locking pin with adjacent elements.
Um den Verschleiß der Ventilsteuerungseinrichtung gering zu halten, ist es vorteilhaft, wenn die Steueröffnung und der Steuerzapfen relativ zueinander in solchen Winkelbereichen der Steuerscheibe bzw. der Nockenwelle angeordnet sind, dass die Nockenvorrichtung nur im ventilhublosen Zustand verstellbar ist, wobei vorzugsweise die Grundkreise der Nockenbahnen einem Hubübertragungselement zugewandt sind. In order to keep the wear of the valve control device low, it is advantageous if the control opening and the control pin are arranged relative to each other in such angular ranges of the control disk or the camshaft, that the cam device is adjustable only in valve hubleless state, preferably the base circles of the cam tracks a Hubübertragungselement facing.
Bei einer Verstellung der Nockenwelle von einer ersten Verschiebestellung in eine zweite Verschiebestellung wirkt eine Verstell kraft, beispielsweise eine Federkraft, über das Stellorgan und das Mitnahmestück auf die Nockenvorrichtung und somit auf den Steuerzapfen in Richtung der Steuerscheibe ein, wodurch der Steuerzapfen gegen die Stirnfläche der Wand der Steuerscheibe gepresst wird. Solange der Steuerzapfen an der Wand der Steuerscheibe anliegt, wird eine axiale Bewegung der Nockenvorrichtung verhindert. Sobald aber der Steuerzapfen durch die Nockenwellendrehung in den Bereich der Steueröffnung gelangt, wird dieser durch die auf die Nockenvorrichtung wirkende Federkraft durch die Steueröffnung der Steuerscheibe gedrückt, bis der Steuerzapfen die Steueröffnung vollständig durchsetzt hat. Diese Verstellung geschieht am besten in einem ventil- hubfreien Zustand, also wenn die Grundkreise einem Hubübertragungselement, wie beispielsweise einem Ventilhebel oder einem Ventilstößel, zugewandt sind. Die Nockenvorrichtung befindet sich nach der Verstellung nun in ihrer zweiten Verschiebestellung. Die Erfindung wird im Folgenden anhand der nicht einschränkenden Figuren näher erläutert. Darin zeigen : In an adjustment of the camshaft from a first displacement position to a second displacement position acts an adjusting force, such as a spring force, via the actuator and the driving piece on the cam device and thus on the control pin in the direction of the control disk, whereby the control pin against the end face of the wall the control disk is pressed. As long as the control pin abuts against the wall of the control disk, an axial movement of the cam device is prevented. But as soon as the control pin passes through the camshaft rotation in the region of the control opening, this is pressed by the force acting on the cam device spring force through the control opening of the control disk until the control pin has completely penetrated the control port. This adjustment is best done in a valve lift-free state, so when the basic circuits are facing a Hubübertragungselement, such as a valve lever or a valve lifter. The cam device is now after the adjustment in its second displacement position. The invention is explained in more detail below with reference to the non-limiting figures. Show:
Fig. 1 eine erfindungsgemäße variable Ventilsteuerungseinrichtung in einer Schrägansicht in einem Längsschnitt in einer ersten Verschiebestellung; 1 shows a variable valve control device according to the invention in an oblique view in a longitudinal section in a first displacement position.
Fig. 2 die Ventilsteuerungseinrichtung in einem Längsschnitt in der ersten Fig. 2, the valve control device in a longitudinal section in the first
Verschiebestellung;  Displacement position;
Fig. 3 die Ventilsteuerungseinrichtung in einer anderen Schrägansicht in der ersten Verschiebestellung; 3 shows the valve control device in another oblique view in the first displacement position.
Fig. 4 die Ventilsteuerungseinrichtung in einer weiteren Schrägansicht in der ersten Verschiebestellung; 4 shows the valve control device in a further oblique view in the first displacement position;
Fig. 5 die Ventilsteuerungseinrichtung in einer Schrägansicht in einem Fig. 5, the valve control device in an oblique view in one
Längsschnitt in einer zweiten Verschiebestellung;  Longitudinal section in a second displacement position;
Fig. 6 die Ventilsteuerungseinrichtung in einem Längsschnitt in der zweiten Verschiebestellung; 6 shows the valve control device in a longitudinal section in the second displacement position.
Fig. 7 die Ventilsteuerungseinrichtung in einer anderen Schrägansicht in der zweiten Verschiebestellung; FIG. 7 shows the valve control device in another oblique view in the second displacement position; FIG.
Fig. 8 die Ventilsteuerungseinrichtung in einer weiteren Schrägansicht in der zweiten Verschiebestellung; und 8 shows the valve control device in a further oblique view in the second displacement position; and
Fig. 9 die Ventilsteuerungseinrichtung in einer Seitenansicht. Fig. 9, the valve control device in a side view.
Die Figuren zeigen eine variable Ventilsteuerungseinrichtungseinrichtung 1 für Brennkraftmaschinen mit mindestens einer drehbar um eine Nockenwellenachse 2 gelagerten Nockenwelle 3, wobei eine Nockenvorrichtung 4 mit zumindest zwei Nocken 5, 6 und Nockenbahnen 7, 8 mit der Nockenwelle 3 drehfest, aber axial verschiebbar verbunden ist. Die Nockenvorrichtung 4 wirkt im Ausführungsbeispiel auf ein, beispielsweise als Rollenkörper ausgeführtes Übertragungselement 30 einer Hubübertragungseinrichtung 31 - beispielsweise einen Ventilhebels - ein, welche Hubübertragungseinrichtung 31 zumindest ein in den Fig. nicht weiter dargestelltes Gaswechselventil der Brennkraftmaschine betätigt. The figures show a variable valve timing device 1 for internal combustion engines with at least one rotatably mounted about a camshaft axis 2 camshaft 3, wherein a cam device 4 with at least two cams 5, 6 and cam tracks 7, 8 with the camshaft 3 rotatably, but axially slidably connected. In the exemplary embodiment, the cam device 4 acts on a transmission element 30 of a stroke transmission device 31, for example a valve lever, designed as a roller body, which stroke transmission device 31 actuates at least one gas exchange valve of the internal combustion engine which is not further illustrated in the figures.
Über eine Steuereinrichtung 10 kann wahlweise eine der Nockenbahnen 7, 8 aktiviert bzw. deaktiviert werden. Die Steuerungseinrichtung 10 weist zumindest ein axial innerhalb der Nockenwelle 3 geführtes Stellorgan 11 auf, mit welchem ein durch einen radialen Zapfen gebildetes Mitnahmestück 12 fest verbunden ist. Das Stellorgan 11 ist als Kolben ausgebildet, welcher in einem koaxial zur Nockenwellenachse 2 angeordneten Führungszylinder 13 der Nockenwelle 3 längsverschiebbar geführt ist. Auf eine erste Stirnseite I Ia des Stellorganes 11 wirkt ein Aktuator 14, auf eine zweite Stirnseite I Ib des Stellorganes 11 eine gegen die Auslenkung des Aktuators 14 wirkende Rückstellfeder 15 ein. Das Mitnahmestück 12 durchdringt in radialer Richtung ein Langloch 16 der Nockenwelle 3 und ist in einer radial verlaufenden Bohrung 17 der Nockenvorrichtung 4 eingebettet. Die Nockenvorrichtung 4 ist somit über das Mitnahmestück 12 mit dem Stellorgan 11 verbunden, so dass die axiale Verschiebebewegung des Stellorganes 11 zwischen einer ersten Verschiebestellung und einer zweiten Verschiebestellung auf die Nockenvorrichtung 4 übertragen wird. Durch Verschieben der Nockenvorrichtung 4 kann wahlweise der erste Nocken5 oder der zweite Nocken 6 der Nockenvorrichtung 4 aktiviert werden, indem die erste Nockenbahn 7 bzw. die zweite Nockenbahn 8 in Eingriff mit dem Übertragungselement 30 der Hubübertragungseinrichtung 31 gebracht wird. Optionally, one of the cam tracks 7, 8 can be activated or deactivated via a control device 10. The control device 10 has at least one axially guided within the camshaft 3 actuator 11, with which a formed by a radial pin driving piece 12 is firmly connected. The actuator 11 is formed as a piston, which is guided in a coaxial with the camshaft axis 2 arranged guide cylinder 13 of the camshaft 3 longitudinally displaceable. On a first end face I Ia of the actuator 11, an actuator 14 acts on a second end face I Ib of the actuator 11, a force acting against the deflection of the actuator 14 return spring 15 a. The driving piece 12 penetrates in the radial direction a slot 16 of the camshaft 3 and is embedded in a radially extending bore 17 of the cam device 4. The cam device 4 is thus connected via the driving piece 12 with the actuator 11, so that the axial displacement movement of the actuator 11 is transferred between a first displacement position and a second displacement position on the cam device 4. By shifting the cam device 4, either the first cam 5 or the second cam 6 of the cam device 4 can be selectively activated by bringing the first cam track 7 and the second cam track 8 into engagement with the transmission element 30 of the stroke transmission device 31.
Die Verschiebung der Nockenvorrichtung 4 lässt sich mit minimalem Kraftaufwand im ventilhubfreien Zustand durchführen, also wenn die Grundkreise 7a, 8a der Nockenbahnen 7, 8 dem Übertragungselement 30 der Hubübertragungseinrichtung 31 zugewandt sind. The displacement of the cam device 4 can be carried out with minimal expenditure of force in the valve-lift-free state, that is to say when the base circles 7a, 8a of the cam tracks 7, 8 face the transmission element 30 of the stroke transmission device 31.
Um die Verstellung zwischen den beiden Nocken 5, 6 nur in einer definierten Stellung der Nockenwelle 3, insbesondere im ventilhubfreien Zustand, durchführen zu können, ist ein Sperrorgan 20 vorgesehen. Das Sperrorgan 20 weist einen mit der Nockenvorrichtung 3 fest verbundenen Steuerzapfen 21 und eine koaxial zur Nockenwelle 3 angeordnete gehäusefeste Steuerscheibe 22 auf. Der Steuerzapfen 21 ist radial von einem zylindrischen Außenmantel 18 der Nockenvorrichtung 4 vorspringend angeordnet. Die Steuerscheibe 22 weist auf der der Nockenvorrichtung 4 zugewandten Seite eine normal zur Nockenwellenachse 2 angeordnete bzw. verlaufende Wand 23 auf, in welche ein Wanddurchbruch 24 eingeformt ist. Der im Ausführungsbeispiel als Kreisringsegment geformte Wanddurchbruch 24 bildet eine mit dem Steuerzapfen 21 korrespondierende Steueröffnung 25 und erstreckt sich über einen definierten Winkelbereich ß um die Nockenwellenachse 2, wobei im Ausführungsbeispiel der Winkelbereich ß etwa 130° beträgt (Fig. 9). In order to carry out the adjustment between the two cams 5, 6 only in a defined position of the camshaft 3, in particular in the valve-lift-free state, a blocking element 20 is provided. The locking member 20 has a fixedly connected to the cam device 3 control pin 21 and a coaxial with the camshaft 3 arranged housing-fixed control disk 22. The control pin 21 is radially projecting from a cylindrical outer shell 18 of the cam device 4. The control disk 22 has on the cam device 4 side facing a normal to the camshaft axis 2 arranged or extending wall 23, in which a wall opening 24 is formed. The wall opening 24 formed in the exemplary embodiment as a circular ring segment forms a control opening 25 corresponding to the control pin 21 and extends over the camshaft axis 2 over a defined angular range β, wherein in the exemplary embodiment the angular range β is approximately 130 ° (FIG. 9).
Die Steueröffnung 25 und der Steuerzapfen 21 sind relativ zueinander in solchen Winkelbereichen der Steuerscheibe 22 bzw. der Nockenwelle 3 angeordnet, dass die Nockenvorrichtung 4 nur in einem ventilhublosen Zustand verstellbar ist, also wenn die Grundkreise 7a, 8a der Nockenbahnen 7, 8 der Hubübertragungseinrichtung 31 zugewandt sind. The control opening 25 and the control pin 21 are arranged relative to each other in such angular ranges of the control disk 22 and the camshaft 3 that the cam device 4 is adjustable only in a valve-free state, ie when the base circles 7a, 8a of the cam tracks 7, 8 of the stroke transmission device 31 are facing.
Die Wand 23 weist eine Dicke b auf, die im Wesentlichen der Stärke d des Steuerzapfens 21 - in Richtung der Nockenwellenachse 2 gemessen - entspricht. The wall 23 has a thickness b which substantially corresponds to the thickness d of the control pin 21 - measured in the direction of the camshaft axis 2.
Die Steuerscheibe 22 ist beidseits der Wand 23 freigestellt, so dass eine unbehinderte Drehung des Steuerzapfens 21 um die Nockenwellenachse 2 möglich ist. The control disk 22 is free on both sides of the wall 23, so that an unobstructed rotation of the control pin 21 about the camshaft axis 2 is possible.
Die Fig. 1 und Fig. 2 zeigen die Nockenvorrichtung 4 in einer ersten Verschiebestellung, wobei der erste Nocken 5 mit der ersten Nockenbahn 7 aktiviert ist. Das Stellorgan 11 ist durch den Aktuator 14 in den Fig. 1 und Fig. 2 nach links , also in eine vom Sperrorgan 20 wegführenden Richtung, gedrückt. In der dargestellten Lage der Nockenwelle 3 sind die Grundkreise 7a, 8a dem Übertragungselement 30 der Hubübertragungseinrichtung zugewandt. Der Steuerzapfen 21 befindet sich dabei im Bereich der Steueröffnung 25, sodass die axiale Verstellbewegung der Nockenvorrichtung 4 durch das Sperrorgan 20 - entsprechend der Ansteuerung des Aktuators 14 - freigegeben ist. FIGS. 1 and 2 show the cam device 4 in a first displacement position, wherein the first cam 5 with the first cam track 7 is activated. The actuator 11 is pressed by the actuator 14 in Figs. 1 and Fig. 2 to the left, ie in a direction away from the blocking member 20 direction. In the illustrated position of the camshaft 3, the basic circuits 7a, 8a face the transmission element 30 of the stroke transmission device. The control pin 21 is located in the region of the control opening 25, so that the axial adjustment movement of the cam device 4 through the locking member 20 - according to the activation of the actuator 14 - is released.
Die Fig. 3 und Fig. 4 zeigen die Nockenvorrichtung 4 ebenfalls in der ersten Verschiebestellung, wobei der erste Nocken 5 mit der ersten Nockenbahn 7 aktiviert ist. Der Nocken 5 befindet sich hier aber in seiner Hubstellung - eine axiale Verstellung der Nockenvorrichtung 4 wäre hier unerwünscht. De axiale Verstellung in dieser Nockenwellenlage wird durch das Sperrorgan 20 gesperrt, indem der Steuerzapfen 21 an die Wand 23 der Steuerscheibe 22 fährt. Deutlich ist in Fig. 3 und Fig. 4 zu erkennen, dass sich der Steuerzapfen 21 in seiner unteren Position befindet, welche der Steueröffnung 25 bezüglich der Nockenwellenachse 2 diametral gegenüberliegt, und somit an der Wand 23 anliegt. FIGS. 3 and 4 likewise show the cam device 4 in the first displacement position, the first cam 5 with the first cam track 7 being activated. The cam 5 is here but in its stroke position - an axial adjustment of the cam device 4 would be undesirable here. The axial adjustment in this camshaft position is blocked by the locking member 20 by the control pin 21 moves to the wall 23 of the control disk 22. It can clearly be seen in FIGS. 3 and 4 that the control pin 21 is in its lower position, which is diametrically opposite the control opening 25 with respect to the camshaft axis 2, and thus bears against the wall 23.
In den Fig. 5 und Fig. 6 befindet sich die Nockenvorrichtung 4 in einer zweiten Verschiebestellung, wobei der zweite Nocken 6 mit der zweiten Nockenbahn 8 aktiviert ist. Das Stellorgan 11 ist durch die innerhalb der Nockenwelle 3 angeordnete Rückstellfeder 15 bei deaktivierten Aktuator 14 in den Fig. 5 und Fig. 6 nach rechts, also in Richtung des Sperrorgans 20, gedrückt. In der dargestellten Lage der Nockenwelle 3 sind auch hier die Grundkreise 7a, 8a dem Übertragungselement 30 der Hubübertragungseinrichtung zugewandt. Der Steuerzapfen 21 befindet sich somit im Bereich der Steueröffnung 25, sodass die axiale Verstellbewegung Nockenvorrichtung 4 durch das Sperrorgan 20 - entsprechend der Ansteuerung des Aktuators 14 - freigegeben ist. In FIGS. 5 and 6, the cam device 4 is in a second displacement position, the second cam 6 with the second cam track 8 being activated. The actuator 11 is pressed by the arranged within the camshaft 3 restoring spring 15 with deactivated actuator 14 in Figs. 5 and Fig. 6 to the right, ie in the direction of the locking member 20. In the illustrated position of the camshaft 3, the basic circuits 7a, 8a here too face the transmission element 30 of the stroke transmission device. The control pin 21 is thus located in the region of the control opening 25, so that the axial adjustment cam device 4 through the locking member 20 - according to the activation of the actuator 14 - is released.
Auch in Fig. 9 befindet sich die - noch oder bereits einen Ventilhub des entsprechenden Gaswechselventils veranlassende - Nockenvorrichtung 4 noch in ihrer zweiten Verschiebestellung, allerdings wird die Verstellbewegung der Nockenvor- richtung 4 durch den Aktuator 14 in die erste Verschiebestellung durch das Sperrorgan 20 gesperrt, da sich der Sperrzapfen 21 außerhalb der Steueröffnung 25 befindet und somit an der Wand 23 anliegt. Erst wenn der Steuerzapfen 21 durch die Nockenwelle 3 in eine in den Fig. gesehen obere Stellung gedreht wird und sich - in einer Projektion in Richtung der Nockenwellenachse 2 betrachtet - innerhalb der Steueröffnung 25 befindet, wird die Verstellbewegung von der zweiten in die erste Verschiebestellung freigegeben. Also in FIG. 9, the cam device 4 is still in its second displaced position - yet or already initiating a valve lift of the corresponding gas exchange valve, although the adjustment movement of the cam advancer is still in its second displacement position. direction 4 locked by the actuator 14 in the first displacement position by the locking member 20, since the locking pin 21 is outside the control opening 25 and thus rests against the wall 23. Only when the control pin 21 is rotated by the camshaft 3 in an upper position seen in the figures and - viewed in a projection in the direction of the camshaft axis 2 - within the control opening 25, the adjusting movement is released from the second to the first displacement position ,
Das Sperrorgan 20 ermöglicht eine einfache Ansteuerung des Aktivators 14, da dieser unabhängig von der jeweiligen Drehposition der Nockenwelle 3 aktiviert oder deaktiviert werden kann. The blocking member 20 allows easy activation of the activator 14, since it can be activated or deactivated independently of the respective rotational position of the camshaft 3.
Es sollte deutlich sein, dass die Erfindung nicht auf das beschriebene Ausführungsbeispiel begrenzt ist, sondern verschiedene Modifikationen innerhalb des Schutzbereichs des Hauptanspruchs möglich sind. Andersartige konstruktive Ausgestaltungen sind ebenfalls denkbar. It should be understood that the invention is not limited to the embodiment described, but various modifications are possible within the scope of the main claim. Other constructive embodiments are also conceivable.

Claims

P A T E N T A N S P R Ü C H E PATENT APPLICATIONS
1. Variable Ventilsteuerungseinrichtung (1) für Brennkraftmaschinen der Hubkolbenbauart mit zumindest einem Gaswechselventil, das mittels einer drehbar um eine Nockenwellenachse (2) gelagerten Nockenwelle (3) über eine drehfest mit der Nockenwelle (3) verbundene, zumindest zwei unterschiedliche Nockenbahnen (7, 8) aufweisende Nockenvorrichtung (4) betätigbar ist, wobei mittels einer Steuereinrichtung (10) wahlweise eine der Nockenbahnen (7, 8) aktivierbar und zumindest eine andere Nockenbahn (8, 7) deaktivierbar ist, und wobei die Steuerungseinrichtung (10) zumindest ein axial insbesondere innerhalb der Nockenwelle geführtes Stellorgan (11) aufweist, von welchem mittels zumindest eines Mitnahmestücks (12) mindestens eine drehfest aber axial verschiebbar auf der Nockenwelle (3) gelagerte, zumindest zwei unterschiedlichen Nockenbahnen (7, 8) aufweisende Nockenvorrichtung (4) verstellbar ist, dadurch gekennzeichnet, dass zum Sperren bzw. zur Freigabe der axialen Verstellbewegung der Nockenvorrichtung (4) zumindest ein Sperrorgan (20) vorgesehen ist, wobei das Sperrorgan (20) einen mit der Nockenvorrichtung (4) fest verbundenen Steuerzapfen (21) und eine koaxial zur Nockenwelle (3) angeordnete - vorzugsweise feststehende - Steuerscheibe (22) aufweist, wobei die Steuerscheibe (22) in zumindest einem Winkelbereich zumindest eine Steueröffnung (25) zur Aufnahme des Steuerzapfens (21) aufweist. 1. Variable valve control device (1) for internal combustion engines of Hubkolbenbauart with at least one gas exchange valve by means of a camshaft axis (2) rotatably mounted about a camshaft (3) via a non-rotatably connected to the camshaft (3), at least two different cam tracks (7, 8 ) by means of a control device (10) optionally one of the cam tracks (7, 8) activatable and at least one other cam track (8, 7) can be deactivated, and wherein the control device (10) at least one axially in particular having inside the camshaft guided actuator (11), of which by means of at least one driving piece (12) at least one rotatably but axially displaceably mounted on the camshaft (3), at least two different cam tracks (7, 8) having cam device (4) is adjustable, characterized in that for blocking or for releasing the axial adjustment of the Cam device (4) at least one locking member (20) is provided, wherein the locking member (20) with the cam device (4) fixedly connected control pin (21) and a coaxial with the camshaft (3) arranged - preferably fixed - control disc (22) , wherein the control disk (22) in at least one angular range at least one control opening (25) for receiving the control pin (21).
2. Ventilsteuerungseinrichtung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Steuerzapfen (21) radial vorspringend auf der Nockenvorrichtung (4), vorzugsweise im Bereich eines zylindrischen Außenmantels (18) der Nockenvorrichtung (4), angeordnet ist. 2. Valve control device (1) according to claim 1, characterized in that the control pin (21) is arranged radially projecting on the cam device (4), preferably in the region of a cylindrical outer jacket (18) of the cam device (4).
3. Ventilsteuerungseinrichtung (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Steueröffnung (25) in einer der Nockenvorrichtung (4) zugewandten Wand (23) der Steuerscheibe (22) angeordnet ist, wobei vorzugsweise die Wand (23) normal zur Nockenwellenachse (2) verlaufend ausgebildet ist. 3. Valve control device (1) according to claim 1 or 2, characterized in that the control opening (25) in one of the cam device (4) facing wall (23) of the control disk (22) is arranged, wherein preferably the wall (23) normal to Camshaft axis (2) is designed to extend.
4. Ventilsteuerungseinrichtung (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Steueröffnung (25) als Wanddurchbruch (24) der Wand (23) ausgebildet ist. 4. Valve control device (1) according to one of claims 1 to 3, characterized in that the control opening (25) as a wall opening (24) of the wall (23) is formed.
5. Ventilsteuerungseinrichtung (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Steueröffnung (25) im Wesentlichen die Form eines Kreissegmentes oder Kreisringsegmentes aufweist. 5. Valve control device (1) according to one of claims 1 to 4, characterized in that the control opening (25) has substantially the shape of a circular segment or annular segment.
6. Ventilsteuerungseinrichtung (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass sich die Steueröffnung (25) über einen Winkelbereich (ß) von zumindest 60°, vorzugsweise zumindest 90°, um die Nockenwellenachse (2) erstreckt. 6. Valve control device (1) according to one of claims 1 to 5, characterized in that the control opening (25) over an angular range (ß) of at least 60 °, preferably at least 90 °, to the camshaft axis (2).
7. Ventilsteuerungseinrichtung (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass - in Richtung der Nockenwellenachse (2) gemessen - die Wand (23) eine Dicke (b) aufweist, die im Wesentlichen der Stärke (d) des Steuerzapfens (21) entspricht. 7. Valve control device (1) according to one of claims 1 to 6, characterized in that - measured in the direction of the camshaft axis (2) - the wall (23) has a thickness (b), which is substantially the thickness (d) of the control pin (21).
8. Ventilsteuerungseinrichtung (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Steuerscheibe (22) beidseits der Wand (23) frei gestellt ist. 8. Valve control device (1) according to one of claims 1 to 7, characterized in that the control disk (22) on both sides of the wall (23) is set free.
9. Ventilsteuerungseinrichtung (1) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Steueröffnung (25) und der Steuerzapfen (21) relativ zueinander in solchen Winkelbereichen der Steuerscheibe (22) bzw. der Nockenwelle (3) angeordnet sind, dass die Nockenvorrichtung (4) nur in einem ventilhublosen Zustand verstellbar ist, wobei vorzugsweise die Grundkreise (7a, 7b) der Nockenbahnen (7, 8) einer Hubübertragungseinrichtung (31) zugewandt sind. 9. Valve control device (1) according to one of claims 1 to 8, characterized in that the control opening (25) and the control pin (21) are arranged relative to each other in such angular ranges of the control disk (22) or the camshaft (3) the cam device (4) is adjustable only in a valve-free state, wherein preferably the base circles (7a, 7b) of the cam tracks (7, 8) facing a Hubübertragungseinrichtung (31).
EP16770876.7A 2015-09-18 2016-09-19 Variable valve drive for internal combustion engine Not-in-force EP3350421B1 (en)

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DE102009037268B3 (en) * 2009-08-10 2011-04-07 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Variable valve drive for internal combustion engines for actuating gas exchange valves
JP2011226422A (en) * 2010-04-21 2011-11-10 Honda Motor Co Ltd Variable valve gear
DE102011002142B4 (en) * 2011-04-18 2022-07-28 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Gate circuit for a camshaft
DE102011085706A1 (en) * 2011-11-03 2013-05-08 Schaeffler Technologies AG & Co. KG Valve train for multi-cylinder combustion engine of motorcycle, has position unit whose actuator pins radially extend to cam shaft, where outer jacket surface of portion of actuator pins engage at guide surfaces
DE102011085702A1 (en) * 2011-11-03 2013-05-08 Schaeffler Technologies AG & Co. KG Valve drive for internal combustion engine, has rotationally driven ground camshaft and cam unit rotatably mounted and slidable on ground camshaft in axial direction
DE102011085705A1 (en) * 2011-11-03 2013-05-08 Schaeffler Technologies AG & Co. KG Valve train of internal combustion engine e.g. single-cylinder engine of motorcycle, has actuator that generates control movement in response to purely mechanical speed of camshaft
DE102013007741A1 (en) * 2013-05-07 2014-11-13 Thyssenkrupp Presta Teccenter Ag camshaft

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AT517816B1 (en) 2019-10-15
WO2017045009A1 (en) 2017-03-23
US20190048760A1 (en) 2019-02-14
EP3350421B1 (en) 2019-04-17
AT517816A1 (en) 2017-04-15
US10400637B2 (en) 2019-09-03
CN108350764B (en) 2020-03-10
CN108350764A (en) 2018-07-31

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