Rocker device for a valve train of an internal combustion engine

Abstract

The invention relates to a rocker device for a valve train of an internal combustion engine, having a switchable first rocker and a switchable second rocker, which are each pivotably arranged on a rocker shaft with one axially externally located lever and one axially internally located lever on the rocker shaft next to it, wherein the levers are pivotably supported on the rocker shaft opposite one another and, in order to switch the first rocker, the axially externally located first lever can be coupled to the axially internally located first lever by means of a first coupling mechanism and, in order to switch the second rocker, the axially externally located second lever can be coupled to the axially internally located second lever by means of a second coupling mechanism in order to transmit a lift movement for valve actuation, wherein, in order to actuate the respective coupling mechanism, an actuator assigned to the coupling mechanism is arranged on the axially externally located lever longitudinal sides facing away from one another.

Description

TECHNICAL FIELD

[0001] The invention relates to a rocker device for a valve train of an internal combustion engine. BACKGROUND

[0002] From DE 10 2017 129 720 A1 a switchable rocker device with at least one rocker is known, which is supported on a rocker shaft fixed on the machine and has a cam arm connected with a cam shaft and a valve arm connected with at least one gas exchange valve of a reciprocating piston internal combustion engine.

[0003] US 2004 / 0255887 A1 discloses a valve train for an internal combustion engine, which has a switching mechanism for switching the actuation of the internal combustion engine valves by connecting a driven rocker arm with an actuating rocker arm. SUMMARY

[0004] The technical problem addressed by the invention is therefore to propose a rocker device of the type mentioned above, which enables a simple and cost-advantageously grooving-improved variable valve control.

[0005] A rocker device for a valve train of an internal combustion engine is proposed, which has a switchable first rocker and a switchable second rocker. The first rocker and the second rocker are each pivotably arranged on a rocker shaft with an axially externally located lever and an axially internally located lever on the rocker shaft next to the axially externally located lever, wherein the levers are pivotably supported on the rocker shaft opposite one another. In order to switch the first rocker, the axially externally located first lever can be coupled to the axially internally located first lever by means of a first coupling mechanism in order to transmit a lift movement for valve actuation. In order to switch the second rocker, the axially externally located second lever can be coupled to the axially internally located second lever by means of a second coupling mechanism in order to transmit a lift movement for valve actuation. In order to actuate the respective coupling mechanism, an actuator assigned to the coupling mechanism is arranged on the axially externally located lever on the lever longitudinal side facing away from one another. Since, in this case, an actuator is arranged on the axially externally located lever on the axially externally located side facing away from one another in order to actuate the respective coupling mechanism, the structural space between the rockers or between the axially internally located levers assigned to the rockers, respectively, can be released in the axial direction, in particular due to installation conditions or for constructional reasons. In this case, the actuator is integrated at least partially into a support connected to the rocker shaft. Furthermore, since an actuator for switching is assigned to each coupling mechanism, each rocker can be switched individually by means of the respective actuator. As a result, the actuator can be embodied smaller and a larger number can be produced at lower manufacturing costs. Furthermore, the first rocker makes valve contact with at least one intake valve of the internal combustion engine, and the second rocker makes valve contact with at least one exhaust valve.

[0006] In a further advantageous embodiment of the application, the axially externally located levers can be driven by the camshaft with a pivotable movement in the lift movement as actuation-side levers. As a result, the pick-up of the lift movement of the drive side can take place as far as possible axially externally. In this way, an arrangement of the cams close to the bearing position of the camshaft can be achieved, whereby the load of the camshaft, in particular due to bending, can be reduced.

[0007] In this case, it is also advantageous if the axially internally located first lever makes valve contact as a valve-side first lever with at least one intake valve of the internal combustion engine, and the axially internally located second lever makes valve contact as a valve-side second lever with at least one exhaust valve. In this way, at least one intake valve for a cylinder of the internal combustion engine can be actuated independently of one another by means of the switchable first rocker and at least one exhaust valve can be actuated independently of one another by means of the switchable second rocker.

[0008] It is also advantageous if the levers on the outer operating side are each pivotably mounted on a rocker shaft in an intermediate region between a lever end region on the operating side for the pivotably driven lever and a lever end region on the connecting side for the connection to the respective inner lever. In this way, the levers on the operating side can each be realized as a double-sided lever which can be designed to be as symmetrical as possible with respect to the rocker shaft, thereby reducing the inertia in the so-called Steiner operation and reducing the Hertz pressure on the drive side when picking up the cam lift movement, in particular with cam rollers using a camshaft. Furthermore, the coupling mechanism and the associated actuator can thus be arranged on the valve side of the rocker shaft.

[0009] The individual actuation of the rocker is realized in a simple manner, i.e. a first actuator is provided for switching a first coupling mechanism by means of which an axially outer first lever and an axially inner first lever which is pivotably arranged with respect to the first lever can be coupled. Here, a second actuator is provided for switching a second coupling mechanism by means of which an axially outer second lever and an axially inner second lever which is pivotably arranged with respect to the second lever can be coupled.

[0010] A further advantage can be achieved in that the coupling mechanisms each have an actuating piston which is movable in an axial through-hole at the respective axially outer lever on the operating side, by means of which an associated switching connection piston which is arranged in an axial bore at the respective axially inner lever can be moved in direct actuating contact. Here, the latter can be moved into the through-hole of the outer lever in order to be connected to the lever. The coupling mechanisms can thus each be arranged parallel to the rocker shaft and transversely to the longitudinal axis of the rocker and can be moved for switching. In this way, the rocker can be switched by means of a space-saving so-called transverse locking which simultaneously enables the arrangement of the coupling mechanisms close to the rocker shaft.

[0011] It is particularly advantageous if the coupling mechanisms for coupling the respective outer lever to the respective inner lever are each preloaded into the respective coupling state by means of a spring mechanism. Thereby, in the unactuated state of the actuator, the respective rocker can be held in a locked state and by means of the rocker a valve lift movement can be transmitted to the respectively associated valve.

[0012] In another advantageous embodiment of the application, the actuating pistons are expanded on the end of the at least one axial end side with an outer diameter such that, upon a relative deflection of the respective outer lever relative to the respective actuator and / or relative to the respective connecting piston for switching, an at least partial covering in the axial direction between the respective actuating piston and the respective actuator and / or relative to the respective connecting piston for switching is ensured. In this way, the actuating pistons and the respective connecting piston for switching can always be actuated by the respective actuator. Here, for example, the actuating pistons can also be provided projecting from the through-hole with the end of the end side on the actuator side and expanded beyond the hole diameter. In the covering, the actuating pistons can always be in contact on the actuator side and on the connecting piston side or respectively be provided spaced apart by a small air gap.

[0013] When the actuator is designed as an electric stroke magnet, which accordingly has a linearly movable armature by means of which the respective actuating piston can be moved in direct axial adjustment contact for switching, the construction can be further simplified. Furthermore, the stroke magnet can be produced in large numbers at low cost.

[0014] When the actuator is respectively at least partially integrated in a bracket connected to the rocker shaft and is arranged radially spaced apart from the rocker shaft, a further simplified arrangement is achieved. Thus, the actuator can respectively be arranged on the bracket at an arbitrary individual radial distance from the rocker shaft in a particularly simple manner. Thereby, switching of the coupling mechanism in the vicinity of the rocker shaft and arrangement of the actuator can be achieved, so that the relative movement of the coupling mechanism, for example integrated in the valve-side lever or in the actuating-side lever, relative to the actuator is small in operation. Thus, the contact for switching can always be established simply between the actuator and the coupling mechanism. Furthermore, the rocker device with the actuator, the rocker shaft and the rocker lever can be fixed as a pre-assembled construction unit on the cylinder head of the internal combustion engine by means of the bracket, in particular by means of a threaded connection.

[0015] A return spring mechanism can be provided, which is respectively arranged coaxially on the rocker shaft with a coil-shaped base body on the axial outer side of the outer lever and clamped in the pivot direction with one spring leg on the rocker shaft. Preferably, here the other spring leg is clamped in the pivot direction on the respective axially outer actuating-side lever. Thus, the return spring mechanism guides at the same time respectively with the inner diameter of the base body on the outer diameter of the rocker shaft. The return spring mechanism is preferably designed as a so-called rotary spiral torsion spring as a torsion spring or rotation spring and serves to return the respective lever from the pivoted position into the unpivoted initial position in the decoupled state. In this way, an arrangement of the return spring mechanism between the rockers in the axial direction can be avoided.

[0016] The first rocker lever and the second rocker lever can be switched and manipulated independently of one another. It is possible, for example, to manipulate at least one intake valve of the internal combustion engine by means of the first rocker lever and to manipulate at least one exhaust valve by means of the second rocker lever. It is also conceivable, conversely, to manipulate at least one exhaust valve by means of the first rocker lever and to manipulate at least one intake valve by means of the second rocker lever.

[0017] The integration of the actuator in a common bracket, to which the common rocker lever shaft is connected, on which the switchable rocker lever with the valve-side lever and the manipulation-side lever is arranged, enables the design of the rocker lever device as a preassembled structural unit, which can be simply fixed on the cylinder head of the internal combustion engine by means of the bracket. In order to fix the rocker lever shaft on the bracket and in order to fix the bracket on the cylinder head, one threaded connection each can be provided. The switchable rocker lever device can thus be fixed directly on the cylinder head for each cylinder individually. It is also possible to arrange a plurality of rocker levers on a common rocker lever shaft for the entire cylinder number. Accordingly, it is thus also possible to select whether all or individual cylinders are provided with a switchable rocker lever unit. For example, in order to de-activate cylinders, only half of the existing cylinders of the internal combustion engine can be equipped with a rocker lever device. It is also conceivable that, when a de-activated feed or so-called coasting operation of the engine is to be implemented, all cylinders are correspondingly equipped. BRIEF DESCRIPTION OF DRAWINGS

[0018] Further features of the present application are derived from the following description and the drawings, in which a single embodiment of the present application is illustrated schematically. The drawings are as follows:

[0019] Figure 1 a rocker lever device according to the present application shown in a first operating state,

[0020] Figure 2 a rocker lever device according to the present application shown in a second operating state,

[0021] Figure 3 a cut-out enlarged portion of Figure 2 in a first switching state,

[0022] Figure 4 an enlarged portion of Figure 2 in a second switching state,

[0023] Figure 5 an enlarged portion of Figure 1 in a second switching state. DETAILED DESCRIPTION

[0024] in Figure 1 and Figure 2The rocker device for a valve train of an internal combustion engine according to the application shown in Fig. 1 has a switchable first rocker 1 and a switchable second rocker 2, which are arranged on a common rocker shaft 3, which is fixed in position or fixed to the machine. The first rocker 1 is pivotably arranged on the rocker shaft 3 with a first lever 4, which is axially located outside on the rocker shaft 3, and with a first lever 6, which is axially located inside on the rocker shaft 3 next to the lever. The second rocker 2 is pivotably arranged on the rocker shaft 3 with a second lever 5, which is axially located outside on the rocker shaft 3, and with a second lever 7, which is axially located inside on the rocker shaft 3 next to the lever. Here, the axially located inside levers 6, 7 are arranged opposite each other with their axially inner lever longitudinal sides 6a, 7a, and the axially located outside levers 4, 5 are positioned on the respective axially located inside levers 6, 7 on their respective axially outer lever longitudinal sides 6b, 7b, which face away from each other. The valve-side and the actuating-side levers 4, 5, 6, 7 are each pivotably supported on the rocker shaft 3.

[0025] For switching the first rocker 1, the axially located outside first lever 4 can be coupled with the axially located inside first lever 6 by means of a first coupling mechanism 8. For switching the second rocker 2, the axially located outside second lever 5 can be coupled with the axially located inside second lever 7 by means of a first coupling mechanism 9. Here, an actuator 10, 11 is arranged on the axially located outside lever longitudinal side 4a, 5a, which faces away from each other, of the axially located outside levers 4, 5, respectively. The first actuator 10 is arranged on the axially located outside lever longitudinal side 4a of the axially located outside first lever 4 for actuating the first coupling mechanism 8. The second actuator 11 is positioned on the axially located outside lever longitudinal side 5a of the axially located outside second lever 5 for actuating the second coupling mechanism 9. In this way, the coupling mechanisms 8, 9 can be switched by means of a respectively assigned separate electric actuator 10, 11.

[0026] The axially located outside levers 4, 5 are driven in a pivotable manner as actuating-side levers. For this purpose, the levers are each in contact on one end with an assigned cam 14, 15 of a camshaft 27 of the internal combustion engine by means of a cam roller 12, 13 in order to pick up a cam lift movement. The axially located inside levers 6, 7 are each used as valve-side levers for transmitting the cam lift movement picked up from the axially located outside actuating-side or cam-side levers 4, 5, respectively, as a valve lift movement to at least one not shown gas exchange valve of the internal combustion engine. For this purpose, the axially located inside levers 6, 7 are in contact at a valve-side lever end with one or more not shown gas exchange valves of a cylinder of the internal combustion engine.

[0027] The switchable first rocker lever 1 has a first lever 4 on the axially outer actuating side and a first lever 6 on the axially inner valve side, by means of which two not shown intake valves can be actuated in the valve contact. The switchable second rocker lever 2 comprises a second lever 5 on the axially outer actuating side and a second lever 7 on the axially inner valve side, by means of which two not shown exhaust valves can be actuated in the valve contact. By means of fork-shaped valve contacts, so-called valve bridges, on the valve-side lever end region of the respective axially inner valve-side lever 6, 7, two valves each, that is to say four valves per cylinder, can be actuated simultaneously. Alternatively, only one valve each, that is to say two valves per cylinder, can also be actuated, wherein no valve bridge is required in each case. In Figure 1 and Figure 2 The rocker lever arrangement shown in Figure 1 and Figure 2 with two switchable rocker levers 1, 2 is used for deactivation on an engine for a heavy goods vehicle, which is shown with the only upper camshaft 27 driving the rocker levers 1, 2. The rocker lever arrangement can also be used for an engine with a lower camshaft. The use of a corresponding modification for an engine with two upper camshafts is also conceivable.

[0028] The axially outer actuating-side levers 4, 5 are each supported in an intermediate region between an end on the connecting side thereof and an end on the camshaft side thereof on the rocker lever shaft 3. They are thus double-sided levers which can be pivoted about the rocker lever shaft 3 with their ends.

[0029] The rocker lever arrangement in the first operating state in the base circle phase of the cams 14, 15 is shown in , while in

[0029] the intake cam 14 is in the cam lift phase and the exhaust cam 15 is in the base circle phase in the second operating state. In the cam lift phase, the respective axially outer actuating-side lever 4, 5 is actuated by picking up the cam lift, while in the base circle phase it is not actuated. Figure 1 Figure 2

[0030] Figures 3 to 5 ​​An enlarged portion in the region between the assigned first coupling mechanism 8 and the assigned first actuator 10 on the first rocker lever 1 for coupling the control intake valve in different switching states is shown separately. The first coupling mechanism 8 has a control piston 8a and a connecting piston 8b. The control piston 8a is movably arranged in an axial through-hole 4b on the end of the connecting side of the first lever 4 on the axially externally located control side in order to switch. On the axially internally located valve side of the first lever 6, the connecting piston 8b is movably accommodated in an axial hole 6c. The hole 6c is also designed as an axial through-hole here. The control piston 8a is movable on the end 8c on the end side of the control side by the first actuator 10 in order to switch. The control piston on the other end side end 8d is in contact with the connecting piston 8b. The latter is preloaded onto the control piston 8a by a spring mechanism 16 which is arranged coaxially as a helical compression spring in the hole 6c. The movement of the control piston 8a is limited on the control side by a sleeve 24 which is pressed into the through-hole 4b on the end side and by an axial end-side stop 24a on the sleeve. In a similar manner, the movement of the connecting piston 8b is limited in both movement directions by two sleeves 25, 26 which are pressed in on the respective ends of the hole 6c and by the respective axial end-side stops 25a, 26a on the sleeves. The second coupling mechanism 9 of the second rocker lever 2 is configured analogously to the coupling mechanisms of the first rocker lever 1 and is arranged mirror-inverted in the axial direction with respect to the first rocker lever Figure 1 and Figure 2 ). The coupling mechanisms 8, 9 are integrated in this way in the respective valve-side lever 6, 7 and in the respective control-side lever 4, 5.

[0031] In order to accommodate the actuators 10, 11, a common holder 17 is provided Figure 1 and Figure 2 ). The actuators 10, 11 consist of an electric stroke magnet which is accommodated in a sleeve 17a, 17b of the holder 17, respectively Figures 3 to 5 . The actuators 10, 11 are arranged coaxially with respect to the respective coupling mechanism 8, 9 Figure 1 and Figure 2 ). They each have an armature 10a which is axially movable electromagnetically for the purpose of adjusting contact with the control piston 8a Figures 3 to 5 .

[0032] The actuators 10, 11 with the armatures 10a and the coupling mechanisms 8, 9 in the hole 6c and the through-hole 4b are each arranged parallel to the rocker lever axis 3 and transversely to the longitudinal axis of the rocker levers 1, 2 or are movable for the purpose of switching. In this way, the rocker levers 1, 2 can be switched by means of the so-called transverse locking which saves structural space.

[0033] In accordance with the applicationFigure 3 In the first switching state, the actuator 10 is in an unoperated state, i.e., an unenergized state. The armature 10a is pushed back into the sleeve 17a by the integrated return spring mechanism 10b. Figure 3 Here, in the base circle phase ( Figure 1 In this configuration, when the lever 4 on the control side and the lever 6 on the valve side are in their initial, unpivoted positions, the hole 6c on the lever 6 on the valve side and the through hole 4b on the lever 4 on the control side are axially aligned and opposite each other. Through the spring force of the spring mechanism 16, the connecting piston 8b exits from the hole 4b and moves through the separation surface between the lever 6 on the valve side and the lever 4 on the control side into the through hole 4b. Figure 3 Furthermore, the lever 6 on the valve side is connected to the lever 4 on the operating side. Here, the connecting piston 8b and the operating piston 8a remain in contact at their respective ends 8d. The separation surface between the lever 6 on the valve side and the lever 4 on the operating side is formed by a small axial air gap.

[0034] According to Figure 3 In the third operating state, according to Figure 2 During the cam lift phase of the first rocker arm 1, the cam lift motion picked up from the lever 4 on the operating side at the first cam is transmitted to the lever 6 on the valve side, thereby opening the intake scavenging valve. In a similar manner, the second lever 5 on the operating side can be coupled to the second lever 7 on the valve side via the second coupling mechanism 9 and the second actuator 11, and the second rocker arm 2 can be switched, and the exhaust scavenging valve can be operated by the second rocker arm to open.

[0035] By energizing the travel magnet, actuator 10 operates according to... Figure 4 and Figure 5 In the fourth operating state, the armature 10a is operated. Here, the armature 10a overcomes the spring force of the return spring mechanism 10b, moves out of the sleeve 17a, and makes adjusting contact with the operating piston 8a. The latter is thus preloaded onto the connecting piston 8b. In the base circle phase ( Figure 1 In this process, by manipulating piston 8a, the connecting piston 8b is moved from the through hole 4b to the separation surface between lever 6 on the valve side and lever 4 on the operating side. Figure 3 and Figure 4 This decouples levers 4 and 6. Lever 4 on the operating side is in idle position, and the first rocker arm 1 is disengaged. Therefore, according to... Figure 3 In the third operating state, Figure 2In the cam lift phase of the first rocker lever 1 shown, no cam lift movement is transmitted to the valve-side lever 6, whereby the intake valve is closed. Similarly, by means of the second coupling mechanism 9 and the second actuator 11, the second lever 5 on the actuation side can be coupled with the second lever 7 on the valve side and the second rocker lever 2 can be switched off and the exhaust valve can be closed. In this way, a deactivation of the cylinder can be achieved by means of the rocker lever arrangement with the switched-off first and second rocker levers 1, 2.

[0036] The actuation piston 8a expands mushroom-shaped on the outer diameter on the axially outer end sides of the end 8c, 8d, so that an at least partial axial end side coverage is ensured when the lever 4 on the actuation side is pivoted relative to the armature 10a and relative to the connecting piston 8b Figure 4 and Figure 5 ). The actuation piston with its actuator-side end 8c is arranged outside the through-hole 4b and expands beyond the hole diameter. The not shown actuation piston of the second coupling mechanism 9 can be expanded in the same way on the axially outer end sides.

[0037] In order to reset the axially outer levers 4, 5 on the actuation side from the pivoted position into the unpivoted initial position, reset spring mechanisms 18, 19 are provided Figure 1 and Figure 2 ). Said reset spring mechanisms are arranged coaxially with the coil-shaped base bodies 18a, 19a on the rocker shaft 3 on the axially outer side of the axially outer levers 4, 5 on the actuation side respectively Figures 1 to 5 The reset spring mechanisms 18, 19 here respectively guide on the outer diameter of the rocker shaft 3 with the inner diameter of the base bodies 18a, 19a. The first spring legs 18b, 19b engage clamped in the pivoting direction on the axially outer end sides of the rocker shaft 3 into radially extending grooves 20, 21. The second spring legs 18c, 19c respectively bridge the axially outer lever 4 or 5 in the axial direction on the upper side of the respective axially outer lever 4 or 5 facing away from the valve or the cylinder head and clamp in the pivoting direction on the axially inner side of the respective axially outer lever 4 or 5 Figures 3 to 5 .

[0038] The bracket 17 has a central, long-rectangular base plate 17c, which extends parallel to the rocker shaft 3 below the lower side of the axially inner valve-side levers 6, 7 facing towards the valve or the not shown internal combustion engine cylinder head and the lower side of the axially outer levers 4, 5 on the actuation side Figure 1 and Figure 2). The base plate 17c is configured on its axially outer ends with an arm 17d, 17e which projects perpendicularly away from the cylinder head and forms on its free end a sleeve 17a, 17b. The latter axially opposes the axially outer lever longitudinal side 4a, 5a of the outer, actuation-side lever 4, 5 and accommodates the actuator 10, 11.

[0039] On the upper side of the base plate 17c facing away from the cylinder head, in the axial region between the axially inner valve-side levers 6, 7, a projecting support section 17f is configured which is oriented towards the rocker shaft 3. The rocker shaft 3 is fixed on the support section by means of a first threaded connection 22. A second threaded connection 23 on the base plate 17c allows the bracket 17 to be fixed on the cylinder head, not shown. In this way, the bracket 17 with the rocker shaft 3 and the rockers 1, 2 and the return spring mechanism 18, 19 arranged on the rocker shaft 3 and the actuators 10, 11 accommodated on the bracket 17 can be fixed on the cylinder head as a preassemblable structural unit.

[0040] The rockers 1, 2 can be individually actuated by the actuators 10 or 11, respectively. The stroke magnets of the actuators 10, 11 can be controlled by means of an electronic control device, not shown. For this purpose, a central contact, in particular a central plug, is integrated in the rocker device. An interface for engine control, not shown here, is provided on the outside of the cylinder head of the internal combustion engine. The stroke magnets can be activated by means of a switching command of the engine control, a so-called bus signal. The integrated electronics takes care of calculating the exact energization moment of the stroke magnets. Furthermore, the integrated electronics also decides which of the individual stroke magnets is to be controlled.

[0041] List of reference signs

[0042] 1 rocker

[0043] 2 rocker

[0044] 3 rocker shaft

[0045] 4 lever

[0046] 4a lever longitudinal side

[0047] 4b through hole

[0048] 5 lever

[0049] 6 lever

[0050] 6a lever longitudinal side

[0051] 6b lever longitudinal side

[0052] 6c hole

[0053] 7 lever

[0054] 7a lever longitudinal side

[0055] 7b lever longitudinal side

[0056] 8 coupling mechanism

[0057] 8a actuating piston

[0058] 8b connecting piston

[0059] 8c end

[0060] 8d end

[0061] 9 coupling mechanism

[0062] 10 actuator

[0063] 10a armature

[0064] 10b return spring mechanism

[0065] 11 actuator

[0066] 12 cam roller

[0067] 13 cam roller

[0068] 14 cam

[0069] 15 cam

[0070] 16 spring mechanism

[0071] 17 holder

[0072] 17a sleeve

[0073] 17b sleeve

[0074] 17c base plate

[0075] 17d arm

[0076] 17e arm

[0077] 17f bearing section

[0078] 18 return spring mechanism

[0079] 18a base body

[0080] 18b spring leg

[0081] 18c spring leg

[0082] 19 return spring mechanism

[0083] 19a base body

[0084] 19b spring leg

[0085] 19c spring leg

[0086] 20 slot

[0087] 21 slot

[0088] 22 threaded connection

[0089] 23 threaded connection

[0090] 24 sleeve

[0091] 24a stop

[0092] 25 sleeve

[0093] 25a stop

[0094] 26 sleeve

[0095] 26a stop

[0096] 27 camshaft

Claims

1. A rocker arm device for a valve mechanism of an internal combustion engine, the rocker arm device having a switchable first rocker arm (1) and a switchable second rocker arm (2), the first rocker arm (1) and the second rocker arm (2) being pivotally mounted on a rocker shaft (3) by means of an axially external lever (4, 5) and an axially internal lever (6, 7) adjacent to the axially external lever, wherein, The levers (4, 5, 6, 7) are pivotally supported on the rocker shaft (3), and in order to switch the first rocker (1), the axially outer first lever (4) can be coupled to the axially inner first lever (6) via a first coupling mechanism (8), and in order to switch the second rocker (2), the axially outer second lever (5) can be coupled to the axially inner second lever (7) via a second coupling mechanism (9), so as to transmit the lift motion for valve operation respectively. The characteristic feature is that, in order to operate the corresponding coupling mechanisms (8, 9), an actuator ( ) is respectively provided to the coupling mechanism. 10, 11) are disposed on the axially external longitudinal sides (4a, 5a) of the levers (4, 5) located axially to the outside, and the actuators (10, 11) are respectively at least partially integrated into a bracket (17) connected to the rocker shaft (3), the bracket (17) having a support section (17f) extending toward the rocker shaft (3), the rocker shaft (3) being able to be fixed to the support section (17f), wherein the first rocker (1) makes valve contact with at least one intake valve of the internal combustion engine, and the second rocker (2) makes valve contact with at least one exhaust valve.

2. The rocker arm device according to claim 1, characterized in that, The levers (4, 5) located axially to the outside can be pivotally driven by the camshaft (27) of the internal combustion engine with lift motion energy.

3. The rocker arm device according to claim 1, characterized in that, The first lever (6) located axially inside the engine makes valve contact with at least one intake valve of the internal combustion engine and the second lever (7) located axially inside the engine makes valve contact with at least one exhaust valve.

4. The rocker arm device according to claim 1, characterized in that, The levers (4, 5) located axially on the outside can be pivotally driven by a lever end region on an operating side and connected to the corresponding levers (6, 7) located axially on the inside by a lever end region on a connecting side. The levers (4, 5) located axially on the outside can be pivotally supported on the rocker shaft (3) in the intermediate region between the lever end region on the operating side and the lever end region on the connecting side.

5. The rocker arm device according to claim 1, characterized in that, A first actuator (10) for switching the first coupling mechanism (8) and a second actuator (11) for switching the second coupling mechanism (9) are provided.

6. The rocker device according to any one of claims 1 to 5, characterized in that, The coupling mechanisms (8, 9) each have an operating piston (8a) movable in an axial through hole (4b) at a lever (4, 5) located on the outside of the corresponding axis. The operating piston can move a switching connecting piston (8b) provided in an axial hole (6c) at a lever (6, 7) located on the inside of the corresponding axis in direct adjustment contact for switching. The connecting piston can be moved into the through hole (4b) of the lever in order to connect with the lever (4, 5) located on the outside of the corresponding axis.

7. The rocker arm device according to claim 6, characterized in that, The actuating piston (8a) is expanded in the outer diameter at at least one end (8c) on the axial end side such that when the corresponding external lever (4, 5) is deflected relative to the corresponding actuator and / or relative to the corresponding connecting piston (8b), at least a portion of the actuating piston (8a) and the corresponding actuator and / or the corresponding connecting piston (8b) for switching is covered in the axial direction.

8. The rocker arm device according to any one of claims 1 to 5, characterized in that, The actuators (10, 11) are designed as electrically movable magnets, each having an armature (10a, 11a) that can move linearly, and a correspondingly configured coupling mechanism (8, 9) for switching can be moved through the armature in direct axial adjustment contact.

9. The rocker device according to any one of claims 1 to 5, characterized in that, The actuators (10, 11) are at least partially integrated on a bracket (17) connected to the rocker shaft (3) and are arranged radially relative to the rocker shaft (3).

10. The rocker arm device according to any one of claims 1 to 5, characterized in that, The return spring mechanism (18, 19) is coaxially disposed on the rocker shaft (3) on the outer side of the lever (4, 5) with a coil-shaped base (19a, 19b) surrounding the rocker shaft (3) and clamped on the rocker shaft (3) by one spring leg (18a) and clamped in the pivot direction on the corresponding axially outer lever (4, 5).

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