EP3293374A1 - Mechanically controllable valve drive - Google Patents

Mechanically controllable valve drive Download PDF

Info

Publication number
EP3293374A1
EP3293374A1 EP17186231.1A EP17186231A EP3293374A1 EP 3293374 A1 EP3293374 A1 EP 3293374A1 EP 17186231 A EP17186231 A EP 17186231A EP 3293374 A1 EP3293374 A1 EP 3293374A1
Authority
EP
European Patent Office
Prior art keywords
intermediate lever
roller
axis
rotation
adjusting device
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.)
Withdrawn
Application number
EP17186231.1A
Other languages
German (de)
French (fr)
Inventor
Dr. Stephan Schmitt
Dr. Michael Breuer
Dr. Karsten Grimm
Sabine Siebrandt
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.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP3293374A1 publication Critical patent/EP3293374A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the invention relates to a mechanically controllable valve train for at least one gas exchange valve in a cylinder head of a motor vehicle, with an adjusting device, with an intermediate lever and a roller rocker arm, wherein the intermediate lever at least one camshaft roller, which cooperates with a camshaft, and at least one control organ engagement element, with the adjusting device cooperates, wherein the intermediate lever has a working curve contour which acts on a rotatably mounted about a first axis of rotation roller cam follower of the gas exchange valve, wherein the intermediate lever by means of at least one hinged to a hinge member via bearing means about a second axis of rotation rotatably mounted in a housing part of the cylinder head is stored.
  • Such mechanically controllable valve trains are known in various designs from the prior art and are used to reduce fuel consumption and emissions.
  • an intermediate lever is arranged between the roller rocker arm of the gas exchange valve and the camshaft, which actuates the roller rocker arm via a working cam contour.
  • the cam rotation is transmitted to the intermediate lever via a camshaft roller, so that the intermediate lever and the working cam contour execute a tilting movement and thereby actuate the roller rocker arm.
  • An arranged on the intermediate lever Steuerorganangriffselement, for example, a control shaft roller is operatively connected to an adjusting device, wherein the adjusting device, the tilting movement of the intermediate lever and the working cam contour changed and thereby adjusts the opening and closing movement of the gas exchange valve.
  • Such a mechanically controllable valve train is for example in the DE 100 31 783 A1 described.
  • This valve train comprises an intermediate lever with a camshaft pulley, a control shaft pulley, a working cam contour formed on the intermediate lever, with which the camshaft rotational movement is transmitted to a cam follower, which is connected to a gas exchange valve, as well as a hinged to a hinge member oscillating element, the bearing means about a second axis of rotation is rotatably mounted in a housing part of the cylinder head.
  • a disadvantage of such a valve train is that the bearing in the cylinder head requires a relatively high space, with a secure storage also requires a high production outlay.
  • the invention is therefore the object of further developing a mechanically controllable valve train of the type described above accordingly, so that the disadvantages are avoided in a simple and cost-effective manner.
  • two oscillating elements are provided, between which both the intermediate lever and the roller of the roller finger follower are arranged, wherein the joint member as Joint shaft is formed with the third axis of rotation, which connects the vibrating elements together
  • a control shaft roller is provided, wherein the control shaft roller as the axis of rotation has the third axis of rotation of the joint member, wherein as adjusting a control shaft is provided with at least one eccentric member.
  • a toothing section is provided on the intermediate lever or on the oscillating lever as a control element engaging element, wherein a gear actuator is provided as the adjusting device.
  • FIG. 1 shows a mechanically controllable valve train 2 for a gas exchange valve 4 in a cylinder head 6 of a motor vehicle not shown.
  • the mechanically controllable valve train 2 essentially an adjusting device 8 (see FIG. 2 ), an intermediate lever 10 and a roller rocker 12.
  • the adjusting device 8 is in the Figures 1 and 2 as a drivable by a non-illustrated actuator control shaft 14 with at least one eccentric member 16 per valve train 2 is formed.
  • the intermediate lever 10 in this case has a camshaft roller 18, a Steuerorganangriffselement 20, which is designed as a control shaft roller 21, and a working curve 22.
  • the camshaft pulley 18 is in known manner in contact with a camshaft 24 having at least one cam 26 and transmits the camshaft rotational movement to the intermediate lever 10, so that the intermediate lever 10 due to the eccentricity of the cam 26 of the camshaft 34 performs a tilting movement.
  • the control shaft roller 21 engages the control shaft 14, which, as already noted, has at least one eccentric member 16.
  • the working curve 22 finally transmits, in a known manner, the tilting movement of the intermediate lever 10 onto a roller 28 of the roller cam follower 12 and thus onto the gas exchange valve 4.
  • the roller 28 is arranged rotatably about a first axis of rotation 30 via bearing means 32 in the roller cam follower 12.
  • the intermediate lever 10 is mounted in the present embodiment via two laterally extending from the intermediate lever 10 vibrating elements 34, 36 about a second axis of rotation 38 rotatably mounted in a housing part 40 of the cylinder head 6 via bearing means 42, wherein the roller 28 between the oscillating elements 34, 36 is located.
  • the first axis of rotation 30 of the roller 28 extends coaxially to the second axis of rotation 38 of the bearing of the intermediate lever 10 in the housing part 40 of the cylinder head 6 (see in particular FIG. 2 ).
  • the oscillating elements 34, 36 via a joint member 44, which forms a third axis of rotation 46 of the control shaft roller 21 in this embodiment, articulated on the intermediate lever 10.
  • FIG. 2 shows the valve train 2 from FIG. 1 in a partially sectioned side view.
  • By the coaxial course of the first axis of rotation 30 with the second axis of rotation 38 is a particularly space-optimized valve train 2, which also easy in the cylinder head. 6 is to be integrated.
  • FIG. 3 now shows an alternative embodiment of a mechanically controllable valve drive according to the invention 2.
  • the control engagement element 20 is formed as a toothing section 23 on the vibrating element 34.
  • the adjusting device 8 is executed in this case as Zahnradaktuator 48 This makes it possible to control each gas exchange valve 4 in a simple, constructive manner independent of other gas exchange valves. It should be clear that the toothing section 23 can also be formed on the intermediate lever 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Es betrifft einen Ventiltrieb (2) für mindestens ein Gaswechselventil (4), mit einer Verstelleinrichtung (8), mit einem Zwischenhebel (10) und mit einem Rollenschlepphebel (12), wobei der Zwischenhebel (10) mindestens eine Nockenwellenrolle (18), die mit einer Nockenwelle (24) zusammenwirkt, und mindestens ein Steuerorganangriffselement (20) aufweist, das mit der Verstelleinrichtung (8) zusammenwirkt, wobei der Zwischenhebel (10) eine Arbeitskurvenkontur (22) aufweist, die auf eine um eine erste Drehachse (30) drehbar gelagerte Rolle (28) des Rollenschlepphebels (12) des Gaswechselventils (24) wirkt, wobei der Zwischenhebel (10) mittels mindestens einem Schwingelement (34,36) über Lagermittel (42) um eine zweite Drehachse (38) drehbar in einem Gehäuseteil (40) des Zylinderkopfes (6) gelagert ist und wobei das mindestens eine Schwingelement (34,36) über ein Gelenkorgan (46) mit einer dritten Drehachse (46) am Zwischenhebel angelenkt ist, dadurch gekennzeichnet, dass die erste Drehachse (30) der Rolle (28) des Rollenschlepphebels (12) koaxial zur zweiten Drehachse (38) des Zwischenhebels (10) verläuft.It relates to a valve train (2) for at least one gas exchange valve (4), with an adjusting device (8), with an intermediate lever (10) and with a roller rocker arm (12), wherein the intermediate lever (10) at least one camshaft roller (18) cooperating with a camshaft (24), and having at least one Steuerorganangriffselement (20) which cooperates with the adjusting device (8), wherein the intermediate lever (10) has a working cam contour (22) which is rotatable about a first axis of rotation (30) mounted roller (28) of the Rollenschlepphebels (12) of the gas exchange valve (24), wherein the intermediate lever (10) by means of at least one oscillating element (34,36) via bearing means (42) about a second axis of rotation (38) rotatably in a housing part (40 ) of the cylinder head (6) is mounted and wherein the at least one vibrating element (34,36) via a joint member (46) with a third axis of rotation (46) is articulated on the intermediate lever, characterized in that the first Drehac hose (30) of the roller (28) of the Rollenschlepphebels (12) coaxial with the second axis of rotation (38) of the intermediate lever (10).

Description

Die Erfindung betrifft einen mechanisch steuerbaren Ventiltrieb für mindestens ein Gaswechselventil in einem Zylinderkopf eines Kraftfahrzeuges, mit einer Verstelleinrichtung, mit einem Zwischenhebel und mit einem Rollenschlepphebel, wobei der Zwischenhebel mindestens eine Nockenwellenrolle, die mit einer Nockenwelle zusammenwirkt, und mindestens ein Steuerorganangriffselement aufweist, das mit der Verstelleinrichtung zusammenwirkt, wobei der Zwischenhebel eine Arbeitskurvenkontur aufweist, die auf eine um eine erste Drehachse drehbar gelagerte Rolle des Rollenschlepphebels des Gaswechselventils wirkt, wobei der Zwischenhebel mittels mindestens einem an einem Gelenkorgan angelenkten Schwingelement über Lagermittel um eine zweite Drehachse drehbar in einem Gehäuseteil des Zylinderkopfes gelagert ist.The invention relates to a mechanically controllable valve train for at least one gas exchange valve in a cylinder head of a motor vehicle, with an adjusting device, with an intermediate lever and a roller rocker arm, wherein the intermediate lever at least one camshaft roller, which cooperates with a camshaft, and at least one control organ engagement element, with the adjusting device cooperates, wherein the intermediate lever has a working curve contour which acts on a rotatably mounted about a first axis of rotation roller cam follower of the gas exchange valve, wherein the intermediate lever by means of at least one hinged to a hinge member via bearing means about a second axis of rotation rotatably mounted in a housing part of the cylinder head is stored.

Derartige mechanisch steuerbare Ventiltriebe sind in vielfältigen Ausführungen aus dem Stand der Technik bekannt und werden zur Reduzierung des Kraftstoffbedarfs und der Emissionen eingesetzt. Bei diesen Ventiltrieben wird zwischen dem Rollenschlepphebel des Gaswechselventils und der Nockenwelle ein Zwischenhebel angeordnet, welcher über eine Arbeitskurvenkontur den Rollenschlepphebel betätigt. Dabei wird über eine Nockenwellenrolle die Nockendrehbewegung auf den Zwischenhebel übertragen, so dass der Zwischenhebel und die Arbeitskurvenkontur eine Kippbewegung ausführen und dadurch den Rollenschlepphebel betätigen. Ein am Zwischenhebel angeordnetes Steuerorganangriffselement, beispielsweise eine Steuerwellenrolle, ist mit einer Verstelleinrichtung wirkverbunden, wobei die Verstelleinrichtung die Kippbewegung des Zwischenhebels bzw. der Arbeitskurvenkontur verändert und dadurch die Öffnungs- und Schließbewegung des Gaswechselventils einstellt.Such mechanically controllable valve trains are known in various designs from the prior art and are used to reduce fuel consumption and emissions. In these valve drives, an intermediate lever is arranged between the roller rocker arm of the gas exchange valve and the camshaft, which actuates the roller rocker arm via a working cam contour. In this case, the cam rotation is transmitted to the intermediate lever via a camshaft roller, so that the intermediate lever and the working cam contour execute a tilting movement and thereby actuate the roller rocker arm. An arranged on the intermediate lever Steuerorganangriffselement, for example, a control shaft roller is operatively connected to an adjusting device, wherein the adjusting device, the tilting movement of the intermediate lever and the working cam contour changed and thereby adjusts the opening and closing movement of the gas exchange valve.

Ein derartiger mechanisch steuerbarer Ventiltrieb ist beispielsweise in der DE 100 31 783 A1 beschrieben. Dieser Ventiltrieb umfasst einen Zwischenhebel mit einer Nockenwellenrolle, einer Steuerwellenrolle, einer am Zwischenhebel ausgebildeten Arbeitskurvenkontur, mit der die Nockenwellendrehbewegung auf einen Schlepphebel übertragen wird, welcher mit einem Gaswechselventil verbunden ist, sowie ein an einem Gelenkorgan angelenktes Schwingelement, das über Lagermittel um eine zweite Drehachse drehbar in einem Gehäuseteil des Zylinderkopfes gelagert ist.Such a mechanically controllable valve train is for example in the DE 100 31 783 A1 described. This valve train comprises an intermediate lever with a camshaft pulley, a control shaft pulley, a working cam contour formed on the intermediate lever, with which the camshaft rotational movement is transmitted to a cam follower, which is connected to a gas exchange valve, as well as a hinged to a hinge member oscillating element, the bearing means about a second axis of rotation is rotatably mounted in a housing part of the cylinder head.

Ein Nachteil eines derartigen Ventiltriebs ist, dass die Lagerung im Zylinderkopf einen relativ hohen Bauraum beansprucht, wobei eine sichere Lagerung zudem einen hohen fertigungstechnischen Aufwand bedingt.A disadvantage of such a valve train is that the bearing in the cylinder head requires a relatively high space, with a secure storage also requires a high production outlay.

Der Erfindung liegt daher die Aufgabe zugrunde, einen mechanisch steuerbaren Ventiltrieb der eingangs beschriebenen Gattung entsprechend weiterzuentwickeln, so dass die aufgezeigten Nachteile auf eine einfache und kostengünstige Weise vermieden werden.The invention is therefore the object of further developing a mechanically controllable valve train of the type described above accordingly, so that the disadvantages are avoided in a simple and cost-effective manner.

Diese Aufgabe wird durch einen mechanisch steuerbaren Ventiltrieb mit den Merkmalen des Hauptanspruchs gelöst. Dadurch, dass die erste Drehachse der Rolle des Rollenschlepphebels koaxial zur zweiten Drehachse des Zwischenhebels verläuft, wird kein zusätzlicher Bauraum für die Lagerung des Zwischenhebels benötigt. Zudem ist die Montage im Bereich der Rolle des Rollenschlepphebels einfach zu realisieren.This object is achieved by a mechanically controllable valve train with the features of the main claim. Characterized in that the first axis of rotation of the roller of the roller cam follower extends coaxially to the second axis of rotation of the intermediate lever, no additional space for the storage of the intermediate lever is required. In addition, the assembly in the role of roller cam follower is easy to implement.

In einer besonders vorteilhaften Ausführung sind zwei Schwingelemente vorgesehen, zwischen denen sowohl der Zwischenhebel als auch die Rolle des Rollenschlepphebels angeordnet sind, wobei das Gelenkorgan als Gelenkwelle mit der dritten Drehachse ausgebildet ist, die die Schwingelemente miteinander verbindetIn a particularly advantageous embodiment, two oscillating elements are provided, between which both the intermediate lever and the roller of the roller finger follower are arranged, wherein the joint member as Joint shaft is formed with the third axis of rotation, which connects the vibrating elements together

Vorzugsweise ist als Steuerorganangriffselement eine Steuerwellenrolle vorgesehen, wobei die Steuerwellenrolle als Drehachse die dritte Drehachse des Gelenkorgans aufweist, wobei als Verstelleinrichtung eine Steuerwelle mit mindestens einem Exzenterorgan vorgesehen ist. Durch den Einsatz einer derartigen Steuerwelle können mehrere Ventiltriebe auf einfache Weise angesteuert werden.Preferably, as Steuerorganangriffselement a control shaft roller is provided, wherein the control shaft roller as the axis of rotation has the third axis of rotation of the joint member, wherein as adjusting a control shaft is provided with at least one eccentric member. By using such a control shaft several valve trains can be controlled in a simple manner.

In einer vorteilhaften alternativen Ausführungsform ist als Steuerorganangriffselement ein Verzahnungsteilstück am Zwischenhebel oder am Schwinghebel vorgesehen ist, wobei als Verstelleinrichtung ein Zahnradaktuator vorgesehen ist. Hierdurch ist es auf einfache Weise möglich, einzelne Gaswechselventile unabhängig voneinander an zu steuern.In an advantageous alternative embodiment, a toothing section is provided on the intermediate lever or on the oscillating lever as a control element engaging element, wherein a gear actuator is provided as the adjusting device. This makes it possible in a simple manner to control individual gas exchange valves independently of each other.

Die Erfindung wird anhand einer Zeichnung näher erläutert. Hierbei zeigt:

  • Figur 1 eine erste erfindungsgemäße Ausführung eines mechanisch steuerbaren Ventiltriebs in einer Schnittansicht,
  • Figur 2 eine teilweise geschnittene Seitenansicht des mechanisch steuerbaren Ventiltriebes aus Figur 1 mit einem transparent dargestellten Schwingelement, und
  • Figur 3 eine teilweise geschnittene Seitenansicht eines mechanisch steuerbaren Ventiltriebes gemäß einer alternativen Ausführungsform mit einem transparent dargestellten Schwingelement.
The invention will be explained in more detail with reference to a drawing. Hereby shows:
  • FIG. 1 a first embodiment according to the invention of a mechanically controllable valve drive in a sectional view,
  • FIG. 2 a partially sectioned side view of the mechanically controllable valve train FIG. 1 with a vibrating element shown in phantom, and
  • FIG. 3 a partially sectioned side view of a mechanically controllable valve train according to an alternative embodiment with a vibrating element shown transparent.

Figur 1 zeigt einen mechanisch steuerbare Ventiltrieb 2 für ein Gaswechselventil 4 in einem Zylinderkopf 6 eines nicht weiter dargestellten Kraftfahrzeuges. Hierbei weist der mechanisch steuerbare Ventiltrieb 2 im Wesentlichen eine Verstelleinrichtung 8 (siehe hierzu Figur 2), einen Zwischenhebel 10 und einen Rollenschlepphebel 12 auf. Die Verstelleinrichtung 8 ist in den Figuren 1 und 2 als eine durch einen nicht weiter dargestellten Aktuator antreibbare Steuerwelle 14 mit mindestens einem Exzenterorgan 16 pro Ventiltrieb 2 ausgebildet. Der Zwischenhebel 10 weist hierbei eine Nockenwellenrolle 18, ein Steuerorganangriffselement 20, das als Steuerwellenrolle 21 ausgebildet ist, und eine Arbeitskurve 22 auf. Die Nockenwellenrolle 18 steht auf bekannte Weise mit einer Nockenwelle 24 in Kontakt, die mindestens eine Nocke 26 besitzt und überträgt die Nockenwellendrehbewegung auf den Zwischenhebel 10, so dass der Zwischenhebel 10 aufgrund der Exzentrizität der Nocke 26 der Nockenwelle 34 eine Kippbewegung ausführt. Die Steuerwellenrolle 21 greift auf die Steuerwelle 14 an, die wie bereits angemerkt, mindestens ein Exzenterorgan 16 besitzt. Durch eine Verdrehung der Steuerwelle 14 wird die Kippbewegung des Zwischenhebels 10 derart beeinflusst, dass unterschiedliche Öffnungs- bzw. Schließbewegungen des Gaswechselventils 4 ausführbar sind. Die Arbeitskurve 22 überträgt schließlich auf bekannte Weise die Kippbewegung des Zwischenhebels 10 auf eine Rolle 28 des Rollenschlepphebels 12 und damit auf das Gaswechselventil 4. Die Rolle 28 ist hierbei um eine erste Drehachse 30 drehbar über Lagermittel 32 in dem Rollenschlepphebel 12 angeordnet. FIG. 1 shows a mechanically controllable valve train 2 for a gas exchange valve 4 in a cylinder head 6 of a motor vehicle not shown. Here, the mechanically controllable valve train 2 essentially an adjusting device 8 (see FIG. 2 ), an intermediate lever 10 and a roller rocker 12. The adjusting device 8 is in the Figures 1 and 2 as a drivable by a non-illustrated actuator control shaft 14 with at least one eccentric member 16 per valve train 2 is formed. The intermediate lever 10 in this case has a camshaft roller 18, a Steuerorganangriffselement 20, which is designed as a control shaft roller 21, and a working curve 22. The camshaft pulley 18 is in known manner in contact with a camshaft 24 having at least one cam 26 and transmits the camshaft rotational movement to the intermediate lever 10, so that the intermediate lever 10 due to the eccentricity of the cam 26 of the camshaft 34 performs a tilting movement. The control shaft roller 21 engages the control shaft 14, which, as already noted, has at least one eccentric member 16. By a rotation of the control shaft 14, the tilting movement of the intermediate lever 10 is influenced such that different opening or closing movements of the gas exchange valve 4 are executable. The working curve 22 finally transmits, in a known manner, the tilting movement of the intermediate lever 10 onto a roller 28 of the roller cam follower 12 and thus onto the gas exchange valve 4. The roller 28 is arranged rotatably about a first axis of rotation 30 via bearing means 32 in the roller cam follower 12.

Der Zwischenhebel 10 ist im vorliegenden Ausführungsbeispiel über zwei seitlich vom Zwischenhebel 10 verlaufende Schwingelemente 34, 36 um eine zweite Drehachse 38 drehbar in einem Gehäuseteil 40 des Zylinderkopfes 6 über Lagermittel 42 gelagert, wobei sich die Rolle 28 zwischen den Schwingelementen 34, 36 befindet. Erfindungsgemäß ist nun vorgesehen, dass die erste Drehachse 30 der Rolle 28 koaxial zur zweiten Drehachse 38 der Lagerung des Zwischenhebels 10 im Gehäuseteil 40 des Zylinderkopfes 6 verläuft (siehe hierzu insbesondere Figur 2). Hierbei sind die Schwingelemente 34, 36 über ein Gelenkorgan 44, das in dieser Ausführungsform eine dritte Drehachse 46 der Steuerwellenrolle 21 ausbildet, am Zwischenhebel 10 angelenkt.The intermediate lever 10 is mounted in the present embodiment via two laterally extending from the intermediate lever 10 vibrating elements 34, 36 about a second axis of rotation 38 rotatably mounted in a housing part 40 of the cylinder head 6 via bearing means 42, wherein the roller 28 between the oscillating elements 34, 36 is located. According to the invention, it is now provided that the first axis of rotation 30 of the roller 28 extends coaxially to the second axis of rotation 38 of the bearing of the intermediate lever 10 in the housing part 40 of the cylinder head 6 (see in particular FIG. 2 ). Here, the oscillating elements 34, 36 via a joint member 44, which forms a third axis of rotation 46 of the control shaft roller 21 in this embodiment, articulated on the intermediate lever 10.

Figur 2 zeigt den Ventiltrieb 2 aus Figur 1 in einer teilweise geschnittenen Seitenansicht. Deutlich zu erkennen sind hierbei die Kontakte der Nockenwellenrolle 10 mit der Nockenwelle 24 und der Steuerwellenrolle 21 mit der Steuerwelle 14. Durch den koaxialen Verlauf der ersten Drehachse 30 mit der zweiten Drehachse 38 wird ein besonders bauraumoptimierter Ventiltrieb 2, der zudem einfach in den Zylinderkopf 6 zu integrieren ist, bereitgestellt. FIG. 2 shows the valve train 2 from FIG. 1 in a partially sectioned side view. The contacts of the camshaft roller 10 with the camshaft 24 and the control shaft roller 21 with the control shaft 14. By the coaxial course of the first axis of rotation 30 with the second axis of rotation 38 is a particularly space-optimized valve train 2, which also easy in the cylinder head. 6 is to be integrated.

Figur 3 zeigt nun eine alternative Ausführungsform eines erfindungsgemäßen mechanisch steuerbaren Ventiltriebes 2. Hierbei ist das Steuerangriffselement 20 als Verzahnungsteilstück 23 an dem Schwingelement 34 ausgebildet. Die Verstelleinrichtung 8 ist in diesem Falle als Zahnradaktuator 48 ausgeführt Hierdurch ist es möglich, jedes Gaswechselventil 4 auf einfache, konstruktive Weise unabhängig von anderen Gaswechselventilen anzusteuern. Es sollte deutlich sein, dass das Verzahnungsteilstück 23 auch am Zwischenhebel 10 ausgebildet sein kann. FIG. 3 now shows an alternative embodiment of a mechanically controllable valve drive according to the invention 2. Here, the control engagement element 20 is formed as a toothing section 23 on the vibrating element 34. The adjusting device 8 is executed in this case as Zahnradaktuator 48 This makes it possible to control each gas exchange valve 4 in a simple, constructive manner independent of other gas exchange valves. It should be clear that the toothing section 23 can also be formed on the intermediate lever 10.

Claims (4)

Mechanisch steuerbarer Ventiltrieb (2) für mindestens ein Gaswechselventil (4) in einem Zylinderkopf (6) eines Kraftfahrzeuges, mit einer Verstelleinrichtung (8), mit einem Zwischenhebel (10) und mit einem Rollenschlepphebel (12), wobei der Zwischenhebel (10) mindestens eine Nockenwellenrolle (18), die mit einer Nockenwelle (24) zusammenwirkt, und mindestens ein Steuerorganangriffselement (20) aufweist, das mit der Verstelleinrichtung (8) zusammenwirkt, wobei der Zwischenhebel (10) eine Arbeitskurvenkontur (22) aufweist, die auf eine um eine erste Drehachse (30) drehbar gelagerte Rolle (28) des Rollenschlepphebels (12) des Gaswechselventils (24) wirkt, wobei der Zwischenhebel (10) mittels mindestens einem Schwingelement (34, 36) über Lagermittel (42) um eine zweite Drehachse (38) drehbar in einem Gehäuseteil (40) des Zylinderkopfes (6) gelagert ist und wobei das mindestens eine Schwingelement (34, 36) über ein Gelenkorgan (46) mit einer dritten Drehachse (46) am Zwischenhebel angelenkt ist, dadurch gekennzeichnet, dass die erste Drehachse (30) der Rolle (28) des Rollenschlepphebels (12) koaxial zur zweiten Drehachse (38) des Zwischenhebels (10) verläuft.Mechanically controllable valve train (2) for at least one gas exchange valve (4) in a cylinder head (6) of a motor vehicle, with an adjusting device (8), with an intermediate lever (10) and with a roller rocker lever (12), the intermediate lever (10) at least a camshaft pulley (18) cooperating with a camshaft (24) and having at least one control organ engaging element (20) cooperating with the adjusting device (8), wherein the intermediate lever (10) has a working cam contour (22) which is at one a first rotational axis (30) rotatably mounted roller (28) of the Rollenschlepphebels (12) of the gas exchange valve (24), wherein the intermediate lever (10) by means of at least one vibrating element (34, 36) via bearing means (42) about a second axis of rotation (38 ) is rotatably mounted in a housing part (40) of the cylinder head (6) and wherein the at least one oscillating element (34, 36) via a hinge member (46) with a third axis of rotation (46) angel on the intermediate lever is characterized in that the first axis of rotation (30) of the roller (28) of the Rollenschlepphebels (12) coaxial with the second axis of rotation (38) of the intermediate lever (10). Mechanisch steuerbarer Ventiltrieb (2) nach Anspruch 1, dadurch gekennzeichnet, dass zwei Schwingelemente (34, 36) vorgesehen sind, zwischen denen sowohl der Zwischenhebel (10) als auch die Rolle (28) des Rollenschlepphebels (28) angeordnet sind, wobei das Gelenkorgan (44) als Gelenkwelle mit der dritten Drehachse (46) ausgebildet ist, die die Schwingelemente (34, 36) miteinander verbindet.Mechanically controllable valve drive (2) according to claim 1, characterized in that two oscillating elements (34, 36) are provided, between which both the intermediate lever (10) and the roller (28) of the roller cam follower (28) are arranged, wherein the joint member (44) is designed as a propeller shaft with the third axis of rotation (46), which connects the oscillating elements (34, 36) with each other. Mechanisch steuerbarer Ventiltrieb (2) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass als Steuerorganangriffselement (20) eine Steuerwellenrolle (21) vorgesehen ist, wobei die Steuerwellenrolle (21) als Drehachse die dritte Drehachse (46) des Gelenkorgans (44) aufweist, wobei als Verstelleinrichtung (8) eine Steuerwelle (14) mit mindestens einem Exzenterorgan (16) vorgesehen ist.Mechanically controllable valvetrain (2) according to claim 1 or 2, characterized in that a control shaft roller (21) is provided as the control organ engagement element (20), wherein the control shaft roller (21) has as an axis of rotation the third axis of rotation (46) of the joint organ (44), wherein a control shaft (14) with at least one eccentric member (16) is provided as the adjusting device (8). Mechanisch steuerbarer Ventiltrieb (2) nach der Anspruch 1 oder 2, dadurch gekennzeichnet, dass als Steuerorganangriffselement (20) ein Verzahnungsteilstück (23) am Zwischenhebel (10) oder am Schwinghebel (34, 35) vorgesehen ist, wobei als Verstelleinrichtung (8) ein Zahnradaktuator (48) vorgesehen ist.Mechanically controllable valve train (2) according to claim 1 or 2, characterized in that a toothing section (23) is provided on the intermediate lever (10) or on the oscillating lever (34, 35) as the control element engagement element (20), wherein the adjusting device (8) is a Gear actuator (48) is provided.
EP17186231.1A 2016-09-08 2017-08-15 Mechanically controllable valve drive Withdrawn EP3293374A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016116840 2016-09-08

Publications (1)

Publication Number Publication Date
EP3293374A1 true EP3293374A1 (en) 2018-03-14

Family

ID=59631615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17186231.1A Withdrawn EP3293374A1 (en) 2016-09-08 2017-08-15 Mechanically controllable valve drive

Country Status (1)

Country Link
EP (1) EP3293374A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10136612A1 (en) * 2001-07-17 2003-02-06 Herbert Naumann Variable lift valve controls
DE10237104A1 (en) * 2002-08-13 2004-02-26 Bayerische Motoren Werke Ag Valve drive for a piston combustion engine has a variable lift control with transmission and actuator elements fixed together
JP2004132259A (en) * 2002-10-10 2004-04-30 Mitsubishi Motors Corp Continuously variable valve device for internal combustion engine
GB2395229A (en) * 2002-11-16 2004-05-19 Mechadyne Plc Engine with variable valve lift and timing mechanism
DE10341702A1 (en) * 2003-09-10 2005-04-28 Bayerische Motoren Werke Ag Valve drive mechanism for a lifting-piston internal combustion engine has a cam device to activate a gas shuttle valve in accordance with the cam device
US20100059005A1 (en) * 2008-09-08 2010-03-11 Stone Albert C Method and apparatus for adjusting variable valve lift

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10136612A1 (en) * 2001-07-17 2003-02-06 Herbert Naumann Variable lift valve controls
DE10237104A1 (en) * 2002-08-13 2004-02-26 Bayerische Motoren Werke Ag Valve drive for a piston combustion engine has a variable lift control with transmission and actuator elements fixed together
JP2004132259A (en) * 2002-10-10 2004-04-30 Mitsubishi Motors Corp Continuously variable valve device for internal combustion engine
GB2395229A (en) * 2002-11-16 2004-05-19 Mechadyne Plc Engine with variable valve lift and timing mechanism
DE10341702A1 (en) * 2003-09-10 2005-04-28 Bayerische Motoren Werke Ag Valve drive mechanism for a lifting-piston internal combustion engine has a cam device to activate a gas shuttle valve in accordance with the cam device
US20100059005A1 (en) * 2008-09-08 2010-03-11 Stone Albert C Method and apparatus for adjusting variable valve lift

Similar Documents

Publication Publication Date Title
EP3170997B1 (en) Variable valve drive with a rocker arm
DE202008012484U1 (en) Motor vehicle lock
DE102011118750A1 (en) Variable valve train for an internal combustion engine
DE102012012150B4 (en) Rocker arm arrangement and internal combustion engine
EP3293374A1 (en) Mechanically controllable valve drive
EP3073072B1 (en) Mechanically controllable valve drive and mechanically controllable valve drive assembly
EP3167168B1 (en) Mechanically controllable valve drive
DE102017113362A1 (en) Valve train system with a shift cam follower
EP1590554B1 (en) Fully variable mechanical valve drive mechanism for a piston-type internal combustion engine comprising adjustable valve play compensation
DE102018112423B4 (en) Exhaust flap drive
EP3324010B1 (en) Mechanically controllable valve drive
EP2492469B1 (en) Control for adjusting regulator control elements in an internal combustion engine
EP3263870B1 (en) Device for adjusting the position of components of a combustion engine
DE102013113815A1 (en) Transmission arrangement for a mechanically controllable valve train
DE102011014744B4 (en) Mechanically controllable valve drive and mechanically controllable valve train arrangement
DE102018107111A1 (en) Switchable drag lever of a valve train of an internal combustion engine
DE102011104548A1 (en) Full variable stroke valve controller for combustion engine in automobile, has eccentric and supporting shafts rotated at pivot point of intermediate lever during valve opening duration in order to vary valve lift
AT521446B1 (en) VALVE GEAR DEVICE FOR AN INTERNAL ENGINE
AT518990B1 (en) Internal combustion engine
DE102015224466B4 (en) Valve
DE102015121154B4 (en) Infinitely variable valve lift device and engine equipped with the same
DE102013222681B4 (en) Shifter shaft module for shifting gears in a manual transmission
DE202008009503U1 (en) Arrangement for controlling a switching or swirl flap shaft
DE102013102149B4 (en) Rocker arm arrangement
DE10229181A1 (en) Variable valve drive for controlling gas shuttle vales in an internal combustion engine comprises a lever acting via a catch protrusion on a contact surface of the catch of a transfer element

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180915