WO2017045736A1 - Valve train device, in particular for an internal combustion engine - Google Patents

Valve train device, in particular for an internal combustion engine Download PDF

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Publication number
WO2017045736A1
WO2017045736A1 PCT/EP2016/001352 EP2016001352W WO2017045736A1 WO 2017045736 A1 WO2017045736 A1 WO 2017045736A1 EP 2016001352 W EP2016001352 W EP 2016001352W WO 2017045736 A1 WO2017045736 A1 WO 2017045736A1
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WO
WIPO (PCT)
Prior art keywords
cam
camshaft
switching element
combustion engine
internal combustion
Prior art date
Application number
PCT/EP2016/001352
Other languages
German (de)
French (fr)
Inventor
Thomas Stolk
Alexander Von Gaisberg-Helfenberg
Original Assignee
Daimler Ag
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 filed Critical Daimler Ag
Publication of WO2017045736A1 publication Critical patent/WO2017045736A1/en

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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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/103—Electric motors

Definitions

  • Valve train device in particular for an internal combustion engine
  • the invention relates to a valve drive device, in particular for a
  • Valve train device in particular for an internal combustion engine.
  • a cam member having a multi-track cam and an attack contour, and having a fixed housing switch actuator for axially displacing the at least one cam member comprising an axially fixed switching element, wherein the axially fixed switching element is provided to be in operative connection with the
  • Attack contour to be brought and to move the cam member axially in interaction of the co-rotating with the camshaft attack contour.
  • the invention is in particular the object of providing a valve drive device with a small space requirement. It is achieved by an embodiment according to the invention according to claim 1. Further developments of the invention will become apparent from the dependent claims.
  • a valve drive device in particular for an internal combustion engine, with at least one camshaft having at least one axially displaceable cam member having at least one multi-track cam and at least one attack contour, and with a housing fixedly arranged Wegaktor for axial displacement of the at least one cam element, the includes axially displaceable switching element, which is in operative connection with the attack contour proposed.
  • an attack contour can be achieved with a low axial extent.
  • a space requirement of the cam member in the axial direction can be reduced and an existing space can be better utilized.
  • an axial Space for additional cam tracks of the cam element can be obtained.
  • a "multi-lane cam” is to be understood as meaning a cam with at least two partial cams which respectively form different cam tracks, in particular, the different cam tracks cause different valve strokes a switching element for the axial displacement of
  • Cam element engages, in particular by the switching element engages in an executed as a groove attack contour or embraces a designed as a rib attack contour.
  • the switching element is permanently in operative connection with the attack contour. This ensures compliance with a defined axial position of the cam member and can be dispensed with additional components for securing the defined axial position. Furthermore, a start-up phase in which the
  • Switching element must be brought into contact with the attack contour, be waived and accelerated expiration of the axial displacement of the cam member.
  • the switching actuator is arranged offset in parallel to the camshaft. This allows in particular a simple construction of
  • Valve drive device and a space-filling use of space can be achieved.
  • the fact that the switch actuator is arranged "axially parallel" to the camshaft should in this context be understood in particular to mean that an axis along which the shifting element is displaced runs parallel to an axis of rotation of the camshaft and does not coincide with it to the
  • Camshaft arranged Wegaktor thus different from a arranged on a torsion bar within the camshaft coaxial with the camshaft switching actuator.
  • the attack contour is designed as a circumferential rib. As a result, an easy-to-construct attack contour can be achieved.
  • the invention further relates to an internal combustion engine having a valve drive device according to the invention.
  • the sole FIGURE shows a valve drive device 10 for an internal combustion engine , with a camshaft 11, which has an axially displaceable cam member 13, the two multi-track cam 14, 18 and an attack contour 22, and with a fixed housing switch actuator 23 for axial displacement of the cam member 13, which comprises an axially displaceable switching element 26, which is in operative connection with the attack contour 22.
  • the two multi-lane cams 14, 18 each comprise three partial cams 15, 16, 17, 19, 20, 21 with different cam tracks, the
  • the camshaft 1 1 comprises a drive shaft 12, on which the cam element 3 is arranged.
  • the drive shaft 12 has a straight toothing on its outer circumference.
  • the cam member 13 has on its inner circumference a corresponding spur toothing, which engages in the straight toothing of the drive shaft 12.
  • the cam member 13 is rotatably on the drive shaft 12, but slidably mounted in both axial directions.
  • the drive shaft 12 includes a crankshaft connection for connection to a crankshaft, not shown. In alternative embodiments can be dispensed with the drive shaft 12, for example by the camshaft 1 1 is composed of a plurality of cam elements 13 which engage at their edges.
  • the switching actuator 23 is arranged on a camshaft housing 28, shown schematically, and fastened there.
  • the switch actuator 23 includes a housing that is fixedly connected to the camshaft housing 28, as well as with respect to the housing
  • the switching actuator 23 further includes a rotatable spindle 24 and a spindle 24 in the illustrated embodiment
  • the switching element 26 is disposed on the spindle 24. By a rotation of the spindle 24 by the electric motor 25, the switching element 26 is displaced axially.
  • a hydraulic drive or another drive machine may be used become.
  • a spindle 24 may be used as a carrier of the switching element 26, for example, a running rail or a cable device.
  • the attack contour 22 is designed as circumferentially around the cam member 13 completely circumferential contour. Along the entire circumferential direction has the
  • Attack contour 22 a constant extent in the axial direction.
  • the attack contour 22 forms an interface for the application of an axially acting
  • Switch actuator 23 applied. It is independent of a rotational movement of
  • Camshaft 1 A course of an axial displacement movement is determined solely by the switching actuator 23 via the electric motor 25, which drives the spindle 24 and thus the switching element 26 moves.
  • the switching element 26 is permanently in operative connection with the engagement contour 22 and thus holds the cam element 13 in a defined axial position in order to prevent it from slipping off a selected part cam 15, 16, 17, 19, 20, 21.
  • the switching element 26 has a recess into which the attack contour 22 engages.
  • the attack contour 22 has a slightly larger dimension than the attack contour 22 to
  • Cam element 13 abuts the attack contour 22 at edges of the recess of the
  • Switching element 26 is of this in the axial position within
  • the switching element 26 may have a projection which is provided in a
  • the switching actuator 23 is arranged parallel to the camshaft 1 1.
  • the spindle 24 has an axis of rotation along which the switching element 26 is displaced during a rotational movement of the spindle 24.
  • the axis of rotation thus corresponds to a displacement axis along which the switching element 26 is displaced.
  • the camshaft 1 1 has an axis of rotation, to which the displacement axis of the switching element 26 extends in parallel.
  • the displacement force for displacement of the cam member 13 has a predetermined by a course of the axis of rotation of the spindle 24 effective direction, which thus also extends parallel to the camshaft 11.
  • the attack contour 22 is designed as a circumferential rib and disposed between the two cams 14, 18 of the cam member 13.
  • the attack contour 22 protrudes radially beyond the partial cams 15, 16, 17, 19, 20, 21 of the cams 14, 18.
  • the running as a circumferential rib attack contour 22 is executed without a slope in the axial direction and has a constant width in the circumferential direction of the camshaft 11.
  • the switching element 26 comprises an engagement groove 27, which surrounds the executed as circumferential rib attack contour 22.
  • the attack contour 22 may be designed as a circumferential rib, which has an axial height equal to or less than the partial cams 15, 16, 17, 19, 20, 21.
  • the attack contour 22 may be designed as a circumferential groove into which the switching element 26 engages.

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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 valve train device (10), in particular for an internal combustion engine, comprising at least one camshaft (11) that has at least one axially movable cam element (13) with at least one multi-track cam (14, 18) and at least one engaging contour (22), and further comprising a shifting actuator (23) for axially moving the at least one cam element (13), mounted securely on the housing and having an axially movable shift element (26) that is operatively connected to the engaging contour (22). The invention also relates to a motor vehicle drive train having a valve train device (10) according to the invention.

Description

Daimler AG  Daimler AG
Ventiltriebvorrichtung, insbesondere für eine Brennkraftmaschine Valve train device, in particular for an internal combustion engine
Die Erfindung betrifft eine Ventiltriebvorrichtung, insbesondere für eine The invention relates to a valve drive device, in particular for a
Brennkraftmaschine, und einen Kraftfahrzeugantriebsstrang mit einer Internal combustion engine, and a motor vehicle powertrain having a
Ventiltriebvorrichtung, insbesondere für eine Brennkraftmaschine. Valve train device, in particular for an internal combustion engine.
Aus der DE 196 11 641 C1 ist bereits eine Ventiltriebvorrichtung für eine From DE 196 11 641 C1 is already a valve drive device for a
Brennkraftmaschine bekannt, mit einer Nockenwelle, die ein axial verschiebbares Internal combustion engine is known, with a camshaft having an axially displaceable
Nockenelement aufweist, das einen mehrspurigen Nocken und eine Angriffskontur aufweist, und mit einem gehäusefest angeordneten Schaltaktor zur axialen Verschiebung des zumindest einen Nockenelements, der ein axial festes Schaltelement umfasst, wobei das axial feste Schaltelement dazu vorgesehen ist, in Wirkverbindung mit der A cam member having a multi-track cam and an attack contour, and having a fixed housing switch actuator for axially displacing the at least one cam member comprising an axially fixed switching element, wherein the axially fixed switching element is provided to be in operative connection with the
Angriffskontur gebracht zu werden und in Wechselwirkung der sich mit der Nockenwelle mitdrehenden Angriffskontur das Nockenelement axial zu verschieben. Attack contour to be brought and to move the cam member axially in interaction of the co-rotating with the camshaft attack contour.
Der Erfindung liegt insbesondere die Aufgabe zugrunde, eine Ventiltriebvorrichtung mit einem geringen Bauraumbedarf bereitzustellen. Sie wird durch eine erfindungsgemäße Ausgestaltung entsprechend dem Anspruch 1 gelöst. Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. The invention is in particular the object of providing a valve drive device with a small space requirement. It is achieved by an embodiment according to the invention according to claim 1. Further developments of the invention will become apparent from the dependent claims.
Es wird eine Ventiltriebvorrichtung, insbesondere für eine Brennkraftmaschine, mit zumindest einer Nockenwelle, die zumindest ein axial verschiebbares Nockenelement aufweist, das zumindest einen mehrspurigen Nocken und zumindest eine Angriffskontur aufweist, und mit einem gehäusefest angeordneten Schaltaktor zur axialen Verschiebung des zumindest einen Nockenelements, der ein axial verschiebbares Schaltelement umfasst, das mit der Angriffskontur in Wirkverbindung steht, vorgeschlagen. Dadurch kann eine Angriffskontur mit einer geringen Axialausdehnung erreicht werden. Somit kann ein Bauraumbedarf des Nockenelements in Axialrichtung verringert werden und ein vorhandener Bauraum besser ausgenutzt werden. Insbesondere kann ein axialer Bauraum für zusätzliche Nockenspuren des Nockenelements gewonnen werden. Unter einem„mehrspurigen Nocken" soll in diesem Zusammenhang ein Nocken mit zumindest zwei Teilnocken, die jeweils unterschiedliche Nockenspuren ausbilden, verstanden werden. Insbesondere bewirken die unterschiedlichen Nockenspuren unterschiedliche Ventilhübe. Unter einer„Angriffskontur" soll in diesem Zusammenhang eine Kontur verstanden werden, an der ein Schaltelement zur axialen Verschiebung des It is a valve drive device, in particular for an internal combustion engine, with at least one camshaft having at least one axially displaceable cam member having at least one multi-track cam and at least one attack contour, and with a housing fixedly arranged Schaltaktor for axial displacement of the at least one cam element, the includes axially displaceable switching element, which is in operative connection with the attack contour proposed. As a result, an attack contour can be achieved with a low axial extent. Thus, a space requirement of the cam member in the axial direction can be reduced and an existing space can be better utilized. In particular, an axial Space for additional cam tracks of the cam element can be obtained. In this context, a "multi-lane cam" is to be understood as meaning a cam with at least two partial cams which respectively form different cam tracks, in particular, the different cam tracks cause different valve strokes a switching element for the axial displacement of
Nockenelements angreift, insbesondere, indem das Schaltelement in eine als Nut ausgeführte Angriffskontur eingreift oder eine als Rippe ausgeführte Angriffskontur umgreift. Cam element engages, in particular by the switching element engages in an executed as a groove attack contour or embraces a designed as a rib attack contour.
Ferner wird vorgeschlagen, dass das Schaltelement mit der Angriffskontur permanent in Wirkverbindung steht. Dadurch kann eine Einhaltung einer definierten Axialposition des Nockenelements gesichert und auf zusätzliche Bauteile für eine Sicherung der definierten Axialposition verzichtet werden. Ferner kann auf eine Anfahrphase, in der das It is also proposed that the switching element is permanently in operative connection with the attack contour. This ensures compliance with a defined axial position of the cam member and can be dispensed with additional components for securing the defined axial position. Furthermore, a start-up phase in which the
Schaltelement in Kontakt mit der Angriffskontur gebracht werden muss, verzichtet werden und ein Ablauf der axialen Verschiebung des Nockenelements beschleunigt werden. Switching element must be brought into contact with the attack contour, be waived and accelerated expiration of the axial displacement of the cam member.
Weiterhin wird vorgeschlagen, dass der Schaltaktor parallelversetzt zu der Nockenwelle angeordnet ist. Dadurch können insbesondere eine einfache Konstruktion der Furthermore, it is proposed that the switching actuator is arranged offset in parallel to the camshaft. This allows in particular a simple construction of
Ventiltriebvorrichtung sowie eine raumfüllende Nutzung von Bauraum erreicht werden. Darunter, dass der Schaltaktor„achsparallel" zu der Nockenwelle angeordnet ist, soll in diesem Zusammenhang insbesondere verstanden werden, dass eine Achse, entlang der das Schaltelement verschoben wird, parallel zu einer Drehachse der Nockenwelle verläuft und nicht mit dieser zusammenfällt. Insbesondere ist der parallelversetzt zu der Valve drive device and a space-filling use of space can be achieved. The fact that the switch actuator is arranged "axially parallel" to the camshaft should in this context be understood in particular to mean that an axis along which the shifting element is displaced runs parallel to an axis of rotation of the camshaft and does not coincide with it to the
Nockenwelle angeordnete Schaltaktor damit verschieden von einem auf einem Drehstab innerhalb der Nockenwelle koaxial zu der Nockenwelle angeordneten Schaltaktor. Camshaft arranged Schaltaktor thus different from a arranged on a torsion bar within the camshaft coaxial with the camshaft switching actuator.
Des Weiteren wird vorgeschlagen, dass die Angriffskontur als umlaufende Rippe ausgeführt ist. Dadurch kann eine einfach zu konstruierende Angriffskontur erreicht werden. Furthermore, it is proposed that the attack contour is designed as a circumferential rib. As a result, an easy-to-construct attack contour can be achieved.
Die Erfindung betrifft ferner einen Brennkraftmaschine mit einer erfindungsgemäßen Ventiltriebvorrichtung. The invention further relates to an internal combustion engine having a valve drive device according to the invention.
Weitere Vorteile ergeben sich aus der folgenden Figurenbeschreibung. In der Figur ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Figur, die Figurenbeschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen. Further advantages will become apparent from the following description of the figures. In the figure, an embodiment of the invention is shown. The figure, the description of the figures and the claims contain numerous features in combination. The expert will be the Expediently consider features individually and summarize meaningful further combinations.
Die einzige Figur zeigt eine Ventiltriebvorrichtung 10 für eine Brennkraftmaschine,, mit einer Nockenwelle 11 , die ein axial verschiebbares Nockenelement 13 aufweist, das zwei mehrspurige Nocken 14, 18 und eine Angriffskontur 22 aufweist, und mit einem gehäusefest angeordneten Schaltaktor 23 zur axialen Verschiebung des Nockenelements 13, der ein axial verschiebbares Schaltelement 26 umfasst, das mit der Angriffskontur 22 in Wirkverbindung steht. Die zwei mehrspurigen Nocken 14, 18 umfassen jeweils drei Teilnocken 15, 16, 17, 19, 20, 21 mit unterschiedlichen Nockenspuren, die The sole FIGURE shows a valve drive device 10 for an internal combustion engine ,, with a camshaft 11, which has an axially displaceable cam member 13, the two multi-track cam 14, 18 and an attack contour 22, and with a fixed housing switch actuator 23 for axial displacement of the cam member 13, which comprises an axially displaceable switching element 26, which is in operative connection with the attack contour 22. The two multi-lane cams 14, 18 each comprise three partial cams 15, 16, 17, 19, 20, 21 with different cam tracks, the
unterschiedliche Ventilhubkurven ausbilden. Jeweils ein Teilnocken 15, 16, 17, 19, 20, 21 der Nocken 14, 18 ist mit jeweils einem nicht näher dargestellten Nockenfolger zur Betätigung eines Gaswechselventils der Brennkraftmaschine in Kontakt. Der Schaltaktor 23 verschiebt das Nockenelement 13 axial, um zwischen den unterschiedlichen train different valve lift curves. In each case a partial cam 15, 16, 17, 19, 20, 21 of the cams 14, 18 is in each case with a cam follower, not shown, for actuating a gas exchange valve of the internal combustion engine in contact. The switch actuator 23 displaces the cam member 13 axially to move between the different ones
Teilnocken 15, 16, 17 des Nockens 14 und den Teilnocken 19, 20, 21 des Nockens 18 umzuschalten, die mit dem Nockenfolger in Kontakt sind. Partial cam 15, 16, 17 of the cam 14 and the partial cam 19, 20, 21 of the cam 18 to switch, which are in contact with the cam follower.
Die Nockenwelle 1 1 umfasst eine Triebwelle 12, auf der das Nockenelement 3 angeordnet ist. Die Triebwelle 12 weist an ihrem Außenumfang eine Geradverzahnung auf. Das Nockenelement 13 weist an seinem Innenumfang eine korrespondierende Geradverzahnung auf, die in die Geradverzahnung der Triebwelle 12 eingreift. Das Nockenelement 13 ist auf der Triebwelle 12 drehfest, aber in beide Axialrichtungen verschiebbar gelagert. Die Triebwelle 12 umfasst eine Kurbelwellenanbindung zur Anbindung an eine nicht näher dargestellte Kurbelwelle. In alternativen Ausgestaltungen kann auf die Triebwelle 12 verzichtet werden, beispielsweise indem die Nockenwelle 1 1 aus mehreren Nockenelementen 13 zusammengesetzt ist, die an ihren Rändern ineinandergreifen. The camshaft 1 1 comprises a drive shaft 12, on which the cam element 3 is arranged. The drive shaft 12 has a straight toothing on its outer circumference. The cam member 13 has on its inner circumference a corresponding spur toothing, which engages in the straight toothing of the drive shaft 12. The cam member 13 is rotatably on the drive shaft 12, but slidably mounted in both axial directions. The drive shaft 12 includes a crankshaft connection for connection to a crankshaft, not shown. In alternative embodiments can be dispensed with the drive shaft 12, for example by the camshaft 1 1 is composed of a plurality of cam elements 13 which engage at their edges.
Der Schaltaktor 23 ist an einem schematisch dargestellten Nockenwellengehäuse 28 angeordnet und dort befestigt. Der Schaltaktor 23 umfasst ein Gehäuse, das fest mit dem Nockenwellengehäuse 28 verbunden ist, sowie das gegenüber dem Gehäuse The switching actuator 23 is arranged on a camshaft housing 28, shown schematically, and fastened there. The switch actuator 23 includes a housing that is fixedly connected to the camshaft housing 28, as well as with respect to the housing
verschiebbare Schaltelement 26. Der Schaltaktor 23 umfasst in dem dargestellten Ausführungsbeispiel weiter eine drehbare Spindel 24 und einen die Spindel 24 displaceable switching element 26. The switching actuator 23 further includes a rotatable spindle 24 and a spindle 24 in the illustrated embodiment
antreibenden Elektromotor 25. Das Schaltelement 26 ist an der Spindel 24 angeordnet. Durch eine Drehung der Spindel 24 durch den Elektromotor 25 wird das Schaltelement 26 axial verschoben. In alternativen Ausgestaltungen kann anstelle des Elektromotors 25 beispielsweise ein hydraulischer Antrieb oder eine andere Antriebsmaschine verwendet werden. Anstelle einer Spindel 24 kann als Träger des Schaltelements 26 beispielsweise eine Laufschiene oder eine Seilvorrichtung verwendet werden. driving electric motor 25. The switching element 26 is disposed on the spindle 24. By a rotation of the spindle 24 by the electric motor 25, the switching element 26 is displaced axially. In alternative embodiments, instead of the electric motor 25, for example, a hydraulic drive or another drive machine may be used become. Instead of a spindle 24 may be used as a carrier of the switching element 26, for example, a running rail or a cable device.
Die Angriffskontur 22 ist als in Umfangsrichtung um das Nockenelement 13 vollständig umlaufende Kontur ausgeführt. Entlang der gesamten Umfangsrichtung weist die The attack contour 22 is designed as circumferentially around the cam member 13 completely circumferential contour. Along the entire circumferential direction has the
Angriffskontur 22 eine konstante Erstreckung in Axialrichtung auf. Die Angriffskontur 22 bildet eine Schnittstelle zur Aufbringung einer in axialer Richtung wirkenden Attack contour 22 a constant extent in the axial direction. The attack contour 22 forms an interface for the application of an axially acting
Verschiebekraft auf das Nockenelement 13 aus. Die in axialer Richtung wirkende Displacement force on the cam member 13 from. The acting in the axial direction
Verschiebekraft wird in dem dargestellten Ausführungsbeispiel lediglich von dem Displacement force is in the illustrated embodiment only of the
Schaltaktor 23 aufgebracht. Sie ist unabhängig von einer Drehbewegung der Switch actuator 23 applied. It is independent of a rotational movement of
Nockenwelle 1 1. Ein Verlauf einer axialen Verschiebebewegung wird allein von dem Schaltaktor 23 über den Elektromotor 25, der die Spindel 24 antreibt und damit das Schaltelement 26 verschiebt, bestimmt. Camshaft 1 1. A course of an axial displacement movement is determined solely by the switching actuator 23 via the electric motor 25, which drives the spindle 24 and thus the switching element 26 moves.
Das Schaltelement 26 steht mit der Angriffskontur 22 permanent in Wirkverbindung und hält somit das Nockenelement 13 in einer definierten Axialposition, um ein Abrutschen von einem gewählten Teilnocken 15, 16, 17, 19, 20, 21 zu verhindern. Das Schaltelement 26 weist eine Ausnehmung auf, in die die Angriffskontur 22 eingreift. Die Angriffskontur 22 weist eine geringfügig größere Abmessung auf als die Angriffskontur 22, um The switching element 26 is permanently in operative connection with the engagement contour 22 and thus holds the cam element 13 in a defined axial position in order to prevent it from slipping off a selected part cam 15, 16, 17, 19, 20, 21. The switching element 26 has a recess into which the attack contour 22 engages. The attack contour 22 has a slightly larger dimension than the attack contour 22 to
Fertigungstoleranzen sowie Wärmeausdehnungen der Angriffskontur 22 und/oder des Schaltelements 26 zu kompensieren. Bei einer axialen Verschiebung des Manufacturing tolerances and thermal expansion of the attack contour 22 and / or the switching element 26 to compensate. With an axial displacement of
Nockenelements 13 stößt die Angriffskontur 22 an Kanten der Ausnehmung des Cam element 13 abuts the attack contour 22 at edges of the recess of the
Schaltelements 26 und wird von diesem in der Axialposition innerhalb von Switching element 26 and is of this in the axial position within
Toleranzgrenzen der Abmessungen gehalten. In alternativen Ausgestaltungen kann das Schaltelement 26 einen Vorsprung aufweisen, der dazu vorgesehen ist, in eine Tolerance limits of the dimensions kept. In alternative embodiments, the switching element 26 may have a projection which is provided in a
Ausnehmung der Angriffskontur 22 einzugreifen. Recess of the attack contour 22 intervene.
Der Schaltaktor 23 ist parallelversetzt zu der Nockenwelle 1 1 angeordnet. Die Spindel 24 weist eine Drehachse auf, entlang der das Schaltelement 26 bei einer Drehbewegung der Spindel 24 verschoben wird. Die Drehachse entspricht damit einer Verschiebeachse, entlang der das Schaltelement 26 verschoben wird. Die Nockenwelle 1 1 weist eine Drehachse auf, zu der die Verschiebeachse des Schaltelements 26 parallel verläuft. Die Verschiebekraft zur Verschiebung des Nockenelements 13 weist eine durch einen Verlauf der Drehachse der Spindel 24 vorgegebene Wirkrichtung auf, die somit ebenfalls parallel zu der Nockenwelle 11 verläuft. Die Angriffskontur 22 ist als umlaufende Rippe ausgeführt und zwischen den zwei Nocken 14, 18 des Nockenelements 13 angeordnet. Die Angriffskontur 22 steht radial über den Teilnocken 15, 16, 17, 19, 20, 21 der Nocken 14, 18 hervor. Die als umlaufende Rippe ausgeführte Angriffskontur 22 ist ohne eine Steigung in Axialrichtung ausgeführt und weist eine konstante Breite in Umfangsrichtung der Nockenwelle 11 auf. Das Schaltelement 26 umfasst eine Eingriffsnut 27, die die als umlaufende Rippe ausgeführte Angriffskontur 22 umgreift. In alternativen Ausgestaltungen kann die Angriffskontur 22 als umlaufende Rippe ausgeführt sein, welche eine gleiche oder geringere axiale Höhe aufweist als die Teilnocken 15, 16, 17, 19, 20, 21. In weiteren alternativen The switching actuator 23 is arranged parallel to the camshaft 1 1. The spindle 24 has an axis of rotation along which the switching element 26 is displaced during a rotational movement of the spindle 24. The axis of rotation thus corresponds to a displacement axis along which the switching element 26 is displaced. The camshaft 1 1 has an axis of rotation, to which the displacement axis of the switching element 26 extends in parallel. The displacement force for displacement of the cam member 13 has a predetermined by a course of the axis of rotation of the spindle 24 effective direction, which thus also extends parallel to the camshaft 11. The attack contour 22 is designed as a circumferential rib and disposed between the two cams 14, 18 of the cam member 13. The attack contour 22 protrudes radially beyond the partial cams 15, 16, 17, 19, 20, 21 of the cams 14, 18. The running as a circumferential rib attack contour 22 is executed without a slope in the axial direction and has a constant width in the circumferential direction of the camshaft 11. The switching element 26 comprises an engagement groove 27, which surrounds the executed as circumferential rib attack contour 22. In alternative embodiments, the attack contour 22 may be designed as a circumferential rib, which has an axial height equal to or less than the partial cams 15, 16, 17, 19, 20, 21. In further alternative
Ausgestaltungen kann die Angriffskontur 22 als umlaufende Nut ausgeführt sein, in die das Schaltelement 26 eingreift. Embodiments, the attack contour 22 may be designed as a circumferential groove into which the switching element 26 engages.
Daimler AG Daimler AG
Bezugszeichenliste LIST OF REFERENCE NUMBERS
10 Ventiltriebvorrichtung 10 valve drive device
11 Nockenwelle  11 camshaft
12 Triebwelle  12 drive shaft
13 Nockenelement  13 cam element
14 Nocken  14 cams
15 Teilnocken  15 partial cams
16 Teilnocken  16 partial cams
17 Teilnocken  17 partial cams
18 Nocken  18 cams
19 Teilnocken  19 partial cams
20 Teilnocken  20 partial cams
21 Teilnocken  21 partial cams
22 Angriffskontur  22 attack contour
23 Schaltaktor  23 switching actuator
24 Spindel  24 spindle
25 Elektromotor  25 electric motor
26 Schaltelement  26 switching element
27 Eingriffsnut  27 engagement groove
28 Nockenwellengehäuse  28 camshaft housing

Claims

Daimler AG Patentansprüche Daimler AG claims
1. Ventiltriebvorrichtung, insbesondere für eine Brennkraftmaschine, mit zumindest einer Nockenwelle (11), die zumindest ein axial verschiebbares Nockenelement (13) aufweist, das zumindest einen mehrspurigen Nocken (14, 18) und zumindest eine Angriffskontur (22) aufweist, und mit einem gehäusefest angeordneten Schaltaktor (23) zur axialen Verschiebung des zumindest einen Nockenelements (13), der ein axial verschiebbares Schaltelement (26) umfasst, das mit der Angriffskontur (22) in Wirkverbindung steht. 1. Valve drive device, in particular for an internal combustion engine, with at least one camshaft (11) having at least one axially displaceable cam member (13) having at least one multi-track cam (14, 18) and at least one attack contour (22), and with a housing-arranged switching actuator (23) for the axial displacement of the at least one cam member (13) which comprises an axially displaceable switching element (26) which is in operative connection with the attack contour (22).
2. Ventiltriebvorrichtung nach Anspruch 1 , 2. Valve drive device according to claim 1,
dadurch gekennzeichnet, dass  characterized in that
das Schaltelement (26) mit der Angriffskontur (22) permanent in Wirkverbindung steht.  the switching element (26) is permanently in operative connection with the attack contour (22).
3. Ventiltriebvorrichtung nach Anspruch 1 oder 2, 3. Valve drive device according to claim 1 or 2,
dadurch gekennzeichnet, dass  characterized in that
der Schaltaktor (23) parallelversetzt zu der Nockenwelle (11 ) angeordnet ist.  the switching actuator (23) is arranged offset in parallel to the camshaft (11).
4. Ventiltriebvorrichtung nach einem der vorhergehenden Ansprüche, 4. Valve drive device according to one of the preceding claims,
dadurch gekennzeichnet, dass  characterized in that
die Angriffskontur (22) als umlaufende Rippe ausgeführt ist.  the attack contour (22) is designed as a circumferential rib.
5. Brennkraftmaschine mit einer Ventiltriebvorrichtung (10) nach einem der 5. Internal combustion engine with a valve drive device (10) according to one of
vorhergehenden Ansprüche.  previous claims.
PCT/EP2016/001352 2015-09-15 2016-08-05 Valve train device, in particular for an internal combustion engine WO2017045736A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110537006A (en) * 2017-04-20 2019-12-03 戴姆勒股份公司 Valve actuating mechanism

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016012193A1 (en) 2016-10-12 2018-04-12 Daimler Ag Valve drive device
DE102017003789A1 (en) * 2017-04-20 2018-10-25 Daimler Ag Valve train device, in particular for an internal combustion engine
DE102017008963A1 (en) * 2017-09-26 2019-03-28 Daimler Ag Valve train device, in particular for an internal combustion engine
DE102018000435B4 (en) * 2018-01-19 2020-12-03 Daimler Ag Valve drive for an internal combustion engine. in particular a motor vehicle
DE102018009839A1 (en) 2018-12-14 2020-06-18 Daimler Ag Valve train for an internal combustion engine, in particular a motor vehicle, and internal combustion engine for a motor vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891317A (en) * 1981-11-25 1983-05-31 Honda Motor Co Ltd Variable vlave timing mechanism
JPH0211812A (en) * 1988-06-30 1990-01-16 Suzuki Motor Co Ltd Variable valve timing device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19611641C1 (en) 1996-03-25 1997-06-05 Porsche Ag Valve operating cam drive for combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891317A (en) * 1981-11-25 1983-05-31 Honda Motor Co Ltd Variable vlave timing mechanism
JPH0211812A (en) * 1988-06-30 1990-01-16 Suzuki Motor Co Ltd Variable valve timing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110537006A (en) * 2017-04-20 2019-12-03 戴姆勒股份公司 Valve actuating mechanism
CN110537006B (en) * 2017-04-20 2021-09-24 戴姆勒股份公司 Valve train

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