DE102014205813A1 - Valve control and method for valve control - Google Patents

Abstract

Embodiments relate to a valve control (1) for an internal combustion engine. The valve control (1) comprises a cam (2) of a camshaft. The cam (2) is designed to control an actuation of a valve (3) during a movement. Furthermore, the valve control (1) comprises an actuating element (4) which is arranged in an actuating path between the cam (2) and the valve (3). The actuating element (4) is designed to transmit the movement of the cam (2) to the valve (3). Furthermore, the actuating element (4) is removable from the actuating path, so that during the movement of the cam (2), the valve (3) remains closed.

Description

Embodiments relate to a valve control for an internal combustion engine and a method for valve control in an internal combustion engine.

In many applications, a motor should be used more effectively. In many cases, a motor is used particularly effectively when the engine is operated in a state in which it is fully loaded. This maximum load condition then usually corresponds to a state in which the engine has a lowest specific fuel consumption. In order to maximally load the cylinders of an engine or even the engine even if a maximum possible power of the engine is not required, in conventional engines often one cylinder or a plurality of cylinders is deactivated. Because not all cylinders are active, the engine, even if only a lower power is needed or tapped, can be operated in a new full load range. A cylinder deactivation, for example, in a gasoline engine or a diesel engine represent a way to reduce fuel consumption and / or CO2 emissions.

To adapt a motor to different load conditions, a variety of conventional valve deactivation mechanisms can be used. In some conventional systems, a hollow camshaft with a positive splined toothing on the camshaft is used for each cylinder. The camshaft is then pulled or moved back in the axial direction of the camshaft from the region of the finger lever. This can be avoided that the cam operates the drag lever. The moving or moving back of the camshaft is usually via electromagnetically or hydraulically actuated pins.

In other conventional valve deactivation mechanisms, a hydraulic paddle lever support with a lash adjuster is employed to disable a hydraulically controlled detent piston. For the drag lever then a stroke is released under a spring force, which is smaller than a valve spring force. As a result, in this conventional valve deactivation mechanism, the complete paddle lever support without valve actuation can evade a stroke of the cam.

Further, in a further conventional system for valve deactivation, a drag lever is used, which has a joint and is bendable. To operate the valve, the drag lever can be dimensionally stable and the joint blocked. To deactivate a valve, the joint can be unlocked. For this purpose, a form-locking piston is hydraulically disengaged, so that the cam follower can bend. A movement of the cam then does not lead to an actuation of the valve, but to a kinking of the finger lever.

These conventional systems for valve deactivation or valve control are relatively expensive and often require a fundamental redesign of a cylinder head of the internal combustion engine.

Thus, there is a need to provide a concept for valve control that is as easy as possible to integrate into an engine or its cylinder head.

This requirement is taken into account by a valve control system according to claim 1 and a valve control method according to claim 10.

Embodiments relate to a valve control for an internal combustion engine. The valve control comprises a cam of a camshaft, which is designed to control an actuation of a valve during a movement. Further, the valve controller also includes an actuator disposed in an actuating path between the cam and the valve. The actuator is configured to transmit the movement of the cam to the valve. Further, the actuator is configured to be removed from the actuation path so that upon movement of the cam, the valve remains closed.

By having the actuator disposed and removable from an actuation path between the cam and the valve, in some embodiments, valve deactivation may be performed without costly adjustments to a cylinder head or engine. This can be made possible, for example, because the actuating element is very simple.

The actuation path may be any region or path in which the cam or other element, such as a lever moved by the cam, performs an actuation movement to actuate the valve. The cam may, for example, have a shape that allows, during one revolution of the cam, different deflections or movements of an element at least temporarily in contact with the cam. For this purpose, the cam may, for example, have at least one region which has a larger radius than other regions of the cam. Upon actuation of the valve, the valve can be opened, for example. For this purpose, the valve can if necessary from a Surface, against which it closes a room, are moved away. In cases where the valve is closed, no medium, such as a gas, a fluid, a fuel mixture, fresh air or the like through the valve in the space enclosed by the valve (eg cylinder interior) can penetrate. When the valve is opened, a fluid exchange between an environment and the cylinder interior is possible.

For example, if the actuator is removed from the actuation path so that the valve remains closed upon movement of the cam, force and / or form fit may be interrupted between the cam or other transmission member controlled by the cam and the valve. To transfer movement of the cam to the actuator, in some embodiments, the valve controller may include a lever that is at least partially disposed in the actuation path. Characterized in that the cam as a transmission element comprises the lever, a more variable arrangement between the cam and valve could be made possible. For example, the lever may be a tilt or drag lever.

In some other embodiments, the actuating element is rotatably mounted about a pivot point. As a result, the actuating element can be pivoted out of the actuating path. Because the actuator can be pivoted out of the actuation path, in some embodiments, a mechanism for removing the actuator from the actuation path or for deactivating the valve can be made very simple. Furthermore, the fact that the actuating element is completely removed from the actuating travel, this itself very easily and thereby possibly also be easily formed. Thus, in some embodiments, an inertia of the actuating element can be kept as low as possible. This may be important, for example, to shorten a response of the actuator. As a result, if necessary, the introduction or removal of the actuating element from the actuating path or within these within a short time, when the cam is in a position in which he performs no valve actuation. For example, the actuating element may be attached to a pivot lever, which is rotatably mounted at one end.

Furthermore, the actuating element can be movably mounted in the radial direction relative to the pivot point. Thus, a response of the valve to a movement of the cam could be changed or delayed in a simple manner. In other words, a movement of the cam or of another transmission element can lead to a displacement of the actuating element in the direction of the pivot point. This could delay opening of the valve against a stroke of the cam.

In some embodiments, the actuator is removed by means of a pivoting device from the actuation path. In some cases, the pivoting device for this purpose comprises an electromagnet and the actuating element itself or a bearing of the actuating element is formed at least partially magnetizable. So a pivoting device could be particularly simple. In an energized state, the solenoid then pulls the actuator out of the actuation path. For example, the electromagnet may be attached to the cylinder head or to another component in the engine block so that it is not moved in the on state to the actuator of the actuator or other components in the engine.

Another way to design the pivoting device is to provide a permanent magnet which is held in a biased position by a spring mechanism. The permanent magnet may be connected to the actuating element or a bearing of the actuating element. In the biased position, the permanent magnet or spring mechanism may hold the actuator in the actuation path. Further, the pivot means may comprise an electromagnet which is adapted to attract the permanent magnet in an on state or to overcome the bias of the spring mechanism. In this case, the permanent magnet can be removed from its biased position and remove the actuating element from the actuating travel with this movement. In one embodiment of the pivoting device according to this exemplary embodiment, it is possible, for example, to remove the actuating element from the actuating path with a very low expenditure of energy. The electromagnet can then be energized, for example, only for moving the actuating element or for the brief moment to overcome the spring force.

In some other embodiments, the actuator is mounted on a valve guide or valve stem seal. Thus, for example, a simple integration of the actuating element or the pivot point of the actuating element can be made possible on existing components in the engine block or cylinder head. A further adaptation of the engine can then be avoided if necessary. Under certain circumstances, the valve guide or the valve stem seal adapted to form the pivot point or the storage for the actuator. The adjustment of the valve guide or valve stem seal can be done before they are mounted in the engine block.

In some embodiments, the valve controller has an actuating travel spring. The Betätigungswegfeder is designed to receive the actuator between them. Further, the Betätigungswegfeder is formed to guide a movement of the cam or a lever or other transmission element, or which is moved by the cam when the actuator is removed from the actuating path. Knocking or uncontrolled movement of the lever or cam may be avoided in some embodiments. The actuating travel spring can be arranged, for example, in the actuation path.

The actuation path leads in some embodiments to a valve bridge. The valve bridge may be configured to actuate at least two valves. Thus, for example, an actuation of two valves can be made possible in a simple manner. For example, the valve bridge can actuate the valves at the same time. An example of an actuation path may be a path for transmission of motion. For example, the cam can transmit movement to a lever, this one movement to the actuator and this movement to the valve. From this actuation individual component can be removed. Then a chain for transmitting the motion is interrupted. For example, the components may be arranged so that the lever can be omitted.

Embodiments further relate to a method for valve control in an internal combustion engine. In the method, a cam of a camshaft is moved so that an actuation movement is effected in an actuation path. Further, an actuator is removed from the actuation path so that movement of the cam does not result in actuation of the valve. Thus, in some embodiments, a simple way of valve activation or deactivation is provided that requires only a slight adjustment of the cylinder head itself.

For example, the individual operations of the Move and Remove method may occur simultaneously, in a different order, or partially overlapping.

Further advantageous embodiments will be described in more detail below with reference to exemplary embodiments illustrated in the drawings, to which exemplary embodiments are not restricted.

Thus, the figures show schematically the following views.

1 shows a schematic representation of a side view of a valve control according to an embodiment in an active state, wherein a cam is in a first position;

2 shows a schematic representation of a side view of the valve control according to 1 with the cam in a second position;

3 shows a schematic representation of a side view of the valve control according to 1 in a deactive state, with the cam in the first position;

4 shows a schematic representation of a side view of the valve control according to 3 with the cam in the second position;

5 shows a schematic representation of a perspective view of a valve control according to another embodiment;

6 shows a schematic representation of a side view of a pivoting device for a valve control according to an embodiment in a first position;

7 shows a schematic representation of a side view of the pivoting device according to 6 in a second position; and

8th shows a schematic representation of a method for valve control according to one embodiment.

In the following description of the accompanying drawings, like reference characters designate like or similar components. Further, summary reference numbers are used for components and objects that occur multiple times in one embodiment or in one representation, but are described together in terms of one or more features. Components or objects which are described by the same or by the same reference numerals may be the same, but possibly also different, in terms of individual, several or all features, for example their dimensions, unless otherwise explicitly or implicitly stated in the description.

1 shows a schematic representation of a side view of a valve control 1 according to an embodiment in an active state and a cam 2 in a first position.

In the 1 shown valve control 1 for an internal combustion engine, not shown, includes the cam 2 a camshaft, also not shown. The cam 2 is designed to actuate a valve during a movement 3 to control. Furthermore, the valve control includes 1 an actuator 4 , The actuator 4 is in an actuation path between the cam 2 and the valve 3 arranged. The actuator 4 is also designed to control the movement of the cam 2 on the valve 3 transferred to. Furthermore, the actuating element 4 Removable from the actuation path, so that upon movement of the cam 2 the valve 3 remains closed.

In the embodiment of the 1 becomes a movement of the cam 2 over a lever 5 on the valve 3 or the actuating element 4 transfer. At the lever 5 it is a rocker arm. In further embodiments, not shown, the lever may also be designed as a drag lever.

The lever 5 is about a pivot 6 rotatably mounted. The fulcrum 6 of the lever 5 is opposite the cam 2 and opposite the valve 3 in the embodiment of the 1 to 5 not changeable. In some other embodiments, not shown, the pivot point may be formed so that its position relative to the camshaft is variable.

At a first end of the lever 7 points the lever 5 a role 8th on. The role 8th is rotatable on the lever 5 stored and transmits a movement of the cam 2 on the lever 5 , At the lever 5 It is a rigid, non-kinkable component that controls the movement of the cam 2 , which is arranged in the actuating path, transmits in the Betätigungsweg. At a second end of the lever 9 is the lever 5 with a Betätigungswegfeder 10 connected. The actuating travel spring 10 is designed as a spring tab. The actuating travel spring 10 has two legs, between which the actuating element 4 can be included. The actuating travel spring 10 can be compressed in a direction perpendicular to a major extension of the legs. The actuating travel spring 10 has a U-shape. An open side of the U-shape used for pivoting the actuator 4 between the legs of the Betätigungswegfeder 10 , The connection between the lever 5 and the Betätigungswegfeder 10 can by a screw connection 11 as well as in 3 recognizable be made or the valve clearance adjusting spring 11 can offer the possibility over a positive locking the Betätigungswegfeder 10 to hold in position.

In some other embodiments, not shown, the Betätigungswegfeder may have any other shape and configuration. The fulcrum 6 of the lever 5 is located between the first end 7 and the second end 9 of the lever 5 , This is the fulcrum 6 essentially midway between the two ends of the lever 5 ,

In some other embodiments, not shown, the connection between the Betätigungswegfeder and the lever in any other way, such as gluing, soldering, pressing, notching, welding, riveting, etc., be made. Furthermore, in some other embodiments, not shown, the use of Betätigungswegfeder omitted. Optionally, the actuating travel spring may have any other shape and / or configuration.

The actuating travel spring 10 is located on a valve bridge 12 on or is in contact with this. For example, the Betätigungswegfeder 10 with the valve bridge 12 be connected. For this purpose, for example, the above-mentioned connection options can also be used. In some other embodiments, not shown, the Betätigungswegfeder is directly in contact with the valve or with only one valve without a valve bridge.

With the valve bridge 12 stand two valves 3-a and 3-b in active connection. The valves 3-a and 3-b are arranged parallel to each other.

In some other embodiments, not shown, the valves can be arranged in any other way, for example V-shaped, to each other. Additionally or alternatively, a plurality of valves or only one valve can be controlled with a valve bridge.

Each by a spring mechanism 13 respectively. 13-a and 13-b become the valves 3-a and 3-b against a schematically illustrated wall 14 or a sealing element (valve seats / valve seat rings) pressed a cylinder interior, not shown. 1 shows the valves 3-a and 3-b in a closed state. Here is the cam 2 with an area 15 his run-up surface 22 with the lever 5 in contact. At the area 15 the contact surface has the cam 2 a smallest diameter. That's why the lever 5 not deflected or experiences no stroke and the valves 3 are closed.

The actuator 4 is pivotable about a pivot point 16 stored. The actuator 4 has, for example, the shape of a cuboid. How better off 5 recognizable, is the actuator 4 on a pivot lever 17 picked up or hung up. At its pointing in the direction of pivoting edges, the actuating element 4 one chamfer each 18 on. For example, the insertion of the actuating element 4 in the Betätigungswegfeder 10 be relieved.

In some, not shown embodiments, the chamfers may be formed only at the edges, which actually serve for insertion into the Betätigungswegfeder. Additionally or alternatively, the actuating element 4 have any other shape, such as ball, ball segment, tetrahedron, polyhedron, etc. As a material for the actuator, for example, steel, plastic, a ceramic and / or the like can be used.

At the pivot lever 17 it is a U-shaped bracket. A closed side of the "U's" is arranged in the radial direction of the pivoting movement opposite to the actuating element. The actuator 4 is each on a leg 17-a and 17-b guided. For this purpose, the actuating element 4 two holes 19 on. The actuator 4 is along the pivot lever 17 movably mounted to a certain extent. In other words, a distance between the actuator 4 and the fulcrum 16 to be changed. To this movable storage or reset function of the actuator 4 to allow in the starting position, serves a in 1 illustrated spring 20 , The feather 20 surrounds the thigh 17-a of the pivot lever 17 , On the pivot lever 17 there is a stop 21 for the spring 20 ,

In some other embodiments, not shown, the use of the spring can be omitted. For example, another mechanism can be used to allow the movable mounting of the actuator on the pivot lever. Optionally, the actuating element in the radial direction fixed, so not movable, be fixed to the fulcrum.

Thereby, that the actuating element 4 a distance to the fulcrum 16 can change the response of the valves 3-a and 3-b on the movement of the cam 2 or its contact surface 22 influenced, usually delayed.

Further, the valve controller 1 a pivoting device 23 on. With the swivel device 23 can the actuator 4 or the pivot lever 17 from the Betätigungswegfeder 10 or the actuating path can be pivoted. A more detailed explanation of the pivoting device 23 done to the 6 and 7 ,

2 shows a schematic representation of a side view of the valve control 1 according to 1 and the cam 2 in a second position is thus a state of a valve actuation.

At the in 2 the situation shown is the cam 2 with an area 24 his run-up surface 22 that has a larger radius than the range 15 the contact surface 22 in contact with the lever 5 , This will be the first end of the lever 7 deflected upwards and the second end of the lever 9 towards the wall 14 pressed. The hub of the cam 2 So it's over the lever 5 on the actuator 4 and thus on the valves 3 transfer. The valves open 3 or be from the wall 14 spaced. When moving the cam 2 or the lever 5 becomes the spring 20 compressed and the actuator 4 in the direction of the fulcrum 16 along the pivot lever 17 pressed. Furthermore, with the movement of the pivot lever 5 also the spring mechanism 13 the valves 3 overcome or compressed so that they open. The actuating travel spring 10 is not or only slightly compressed, because in it the actuator 4 is included.

3 shows a schematic representation of a side view of the valve control 1 according to 1 in a deactivated state, wherein the cam 2 located in the first position.

At the in 3 illustrated situation is the actuator 4 removed from the actuation path. The swivel lever 17 was about the fulcrum 16 turned. This was the pivoting device 23 activated. The pivoting device 23 includes an electromagnet. This is fixed in the engine block or on the cylinder head. The swivel lever 17 is formed at least partially magnetizable. When the swivel device 23 is activated, so the electromagnet is energized, this pulls the pivot lever 17 in his direction from the actuation path.

The cam 2 is with his area 15 the contact surface 22 , which has the smaller diameter, with the lever 5 in contact. In this position of the cam 2 becomes the lever 5 not distracted. A valve actuation would, even if the actuator 4 would be in the actuation path, not done.

4 shows a schematic representation of a side view of the valve control 1 according to 3 and the cam 2 is in the second position, that is, a state of valve deactivation.

At the in 4 shown position presses the cam 2 with his area 24 that has the larger radius, the lever 5 at its first end of the lever 7 up. This is done with the second end of the lever 9 a movement in the direction of the valves 3 or the wall 14 carried out. Because the actuator 4 is removed from the actuation path, the valves 3 not open or from the wall 14 moved away. Instead, the Betätigungswegfeder 10 , as in 4 recognizable, compressed. This will cause the movement of the lever 5 burdened and guided by it. Such is a rattling or uncontrolled beating of the lever 5 at least reduced or even avoided.

An upwardly bent portion of the Betätigungswegfeder 10 For example, it may be suitable for an actuating element that has already been deflected or removed from the actuation path 4 in the upward movement of the lever 5 as a rocker arm, so when it is to be brought back into the actuation, to rest in a kind of waiting position. From this waiting position, the actuator 4 or the pivot lever 17 until its (toggle lever) end position, so completely in the actuation path, snap.

In the in the 1 to 4 shown positions are those of the cam 2 predetermined end positions of the components of the valve control 1 (eg valve gear).

5 Thus, shows a perspective view of the pivot lever 17 and the actuating element 4 in an engaged state. The valves 3 are in an actuated position.

In the 5 illustrated valve control 1 is essentially analogous to the valve control 1 of the 1 to 4 built up. A fulcrum 16 for the actuator 4 is located on a valve stem seal 25 , In other words, the lever 17 at the valve stem seal 25 stored. At the valve stem seal 25 is a joint 26 , on which the lever is rotatably received, integrally formed.

In some other, not shown embodiments, the lever 17 also be mounted on a valve stem guide or valve spring pad.

The in the 1 to 5 illustrated valve controls 1 may be suitable for example for engines for trucks or the truck market. The valve control 1 can be easily adapted to a given in an engine block geometry. An attachment or a change of necessary components may possibly only be necessary or limited to one valve area. A conventional bridge for distributing leverage or rocker force to the two valves 3 can through the valve lift 12 as a special version, the bridge will be replaced. The space of the conventional bridge is used in principle to the actuator 4 as a spacer (from English: "spacer") at least in the height of the valve lift as a placeholder between the rocker arm and lever 5 and the valve bridge 12 to place or to remove in the event of valve deactivation. In the actuator 4 it may therefore be a Schnappspacer for disabling the valve movement in an internal combustion engine.

Often engines, for example, for vehicles such as trucks or cars (eg Long Haul Trucks), not under a full load, where they have the lowest specific fuel consumption operated. Engines are operated for 80% of the applications in a range between 1/3 to 1/4 of the full load. These partial load ranges are often less energy-efficient for the engines. Therefore, it may be appropriate that when the engines are operated in the partial load ranges, via a valve and / or fuel shutdown to reduce the number of active cylinder operationally. The other, non-deactivated cylinders can then be brought back into the full load range. This could reduce fuel-saving or CO2 emissions. This can be done by the valve control 1 of the 1 to 5 be used.

6 shows a schematic representation of a side view of a pivoting device 23-a for a valve control 1 according to an embodiment in a first position. 7 shows analogously the pivoting device in a second position.

At a pivoting device 23-a of the 6 it is a further embodiment of a pivoting device 23 , At the pivoting device 23-a is the lever 17 via a spring mechanism 27 with a permanent magnet 28 connected. The permanent magnet 28 is about the spring mechanism 27 held in a biased position. Near the permanent magnet 28 is an electromagnet 29 arranged. The permanent magnet 28 is at a radially inwardly facing surface of a circular segment-shaped arc 30 attached.

The electromagnet 29 is also radially inward of the bow 30 arranged. When the electromagnet 29 is turned on or energized, learns the permanent magnet 28 a force. This force exceeds the force of the spring mechanism 27 , As a result, the permanent magnet moves 28 , as in 7 shown on another side of the bracket 17 , This will be a position of the bracket 17 changed.

When the electromagnet 29 in the in 7 In the situation shown, current is applied to its poles in the opposite way, the movement of the permanent magnet 28 with the segment 30 in opposite directions. The lever 17 snaps back in 6 shown position back. In other words, because in many applications rapid movement of the actuator 4 is desirable as a spacer from and in the actuation path or the power transmission area, as a pivoting device 23-a an electromechanical actuator can be used. In this, the segment pivots 30 around the same pivot as the bracket 17 with the actuating element 4 , The electromagnet 29 may include, for example, two static coils. If these two coils are switched on or energized, experiences the permanent magnet 28 a force that is the permanent magnet 28 and thus the segment 30 moved to turn. Further, on an outside of the segment 30 , So on the permanent magnet 28 , a compression spring as a spring mechanism 27 appropriate. This is with another end to the temple 17 attached. Only when the segment 30 the spring mechanism 27 over a parallel position to the bracket 17 pushed together, the spring mechanism expands 27 and leaves the strap 17 with the actuating element 4 quickly tilt to its desired, other position. In other words, the swinging of the temple works 17 according to the principle of a mousetrap. With the swivel device 23-a a power requirement is reduced, for example, because it requires energy only at the moment of switching.

With the valve control 1 So can a system that can be adapted to the cylinder head of the engine without any technical changes. Adjustments to the cylinder head may be limited to individual, possibly milled bearing surfaces and / or mounting holes. Further, software may be provided to the engine controller for driving the valve control 1 be adjusted. This can for example take over or control the time of activation and deactivation. This can be done electromagnetically, for example, so the cost of the conversion could be reduced.

8th shows a schematic representation of a method 40 for valve control according to an embodiment.

In the process 40 for valve control in an internal combustion engine is in a first operation 41 a cam 2 a camshaft moves, so that along an actuating travel an actuating movement for a valve 3 is effected. Further, in a second process 42 an actuator 4 removed from the actuation path. Then performs a movement of the cam 2 not to an actuation of the valve 3 ,

In other words, as an actuator 4 a spacer used, which can be tipped or removed in a valve bridge of a truck engine. This spacer (eg spacer) sits spring loaded at an upper end of a metal bracket or the pivot lever 17 and can move freely on this. The freedom of movement may be needed when the actuator 4 between the rocker arm 5 and the valve bridge 12 the actuating force on the one or more valves 3 should transfer. About an electromagnetic, hydraulic and / or other drive mechanism, the pivot lever 17 be tilted so far that the actuator 4 is removed from the power flow or actuating travel. About a spring plate tab or the Betätigungswegfeder 10 on the one hand, the valve bridge 12 kept in place. On the other hand, so the necessary counterforce is generated to the lever 5 continue the cam 2 to follow.

Further, according to other embodiments, the valve control may not only be used on a truck as described for the figures, but also for other vehicle drives such as cars, work vehicles, agricultural vehicles, or the like.

The embodiments disclosed in the foregoing description, the appended claims and the appended figures, as well as their individual features, may be relevant and implemented both individually and in any combination for the realization of an embodiment in its various forms.

In some other embodiments, features disclosed as a device feature in other embodiments may also be implemented as method features. Further, features that are implemented as method features in some embodiments may also be implemented as device features in other embodiments.

LIST OF REFERENCE NUMBERS

1

 valve control

2

 cam

3

 Valve

4

 actuator

5

 lever

6

 pivot point

7

 first end of the lever

8th

 role

9

 second end of the lever

10

 Betätigungswegfeder

11

 Screw / Ventilspieleinstellschraube

12

 valve bridge

13

 Spring mechanism / valve spring

14

 Wall / valve seat rings

15

 Area of the contact surface

16

 pivot point

17

 pivoting lever

18

 chamfer

19

 drilling

20

 Return spring

21

 Stop at upper ring, the lower one supports return spring

22

 approach surface

23

 Pivot means

24

 Area of the contact surface

25

 Valve stem seal or valve spring pad

26

 joint

27

 spring mechanism

28

 permanent magnet

29

 electromagnet

30

 bow

40

 method

41

 Move

42

 Remove

Claims (10)

Valve control ( 1 ) for an internal combustion engine having the following features: a cam ( 2 ) of a camshaft, which is designed to actuate a valve during a movement ( 3 ) to control; and an actuator ( 4 ), which in an actuating path between the cam ( 2 ) and the valve ( 3 ) is arranged and adapted to the movement of the cam ( 2 ) on the valve ( 3 ), wherein the actuating element ( 4 ) is removable from the actuating path, so that during the movement of the cam ( 2 ) the valve ( 3 ) remains closed. Valve controller according to claim 1, wherein the actuating element ( 4 ) around a pivot ( 16 ) is rotatably mounted, so that the actuating element ( 16 ) is pivotable from the actuation path. Valve controller according to claim 2, wherein the actuating element ( 4 ) in the radial direction with respect to the pivot point ( 16 ) is movably mounted. Valve control according to one of the preceding claims, comprising a pivoting device ( 23 ) which is adapted to the actuating element ( 4 ) to remove from the actuation path, wherein the pivoting device ( 23 ) comprises an electromagnet and the actuating element ( 4 ) or a storage ( 17 ) of the actuating element ( 4 ) has at least partially ferromagnetic material. Valve control according to one of claims 1 to 3, wherein a pivoting device ( 23 ) a permanent magnet ( 28 ), which via a spring mechanism ( 27 ) is held in a biased position and an electromagnet ( 29 ) which is adapted to a bias of the spring mechanism ( 27 ), so that the actuating element ( 4 ) is removed from the actuation path. Valve controller according to one of the preceding claims, wherein the actuating element ( 4 ) on a valve guide or valve stem seal ( 25 ) is stored. Valve control according to one of the preceding claims, comprising a lever ( 5 ) in the actuating path, which is designed to control the movement of the cam ( 2 ) on the actuator ( 4 ) transferred to. Valve control according to one of the preceding claims, comprising a Betätigungswegfeder ( 10 ) which is adapted to the actuating element ( 4 ) to detect a movement of the cam ( 2 ) or a lever ( 5 ) passing through the cam ( 2 ) is moved when the actuating element ( 4 ) is removed from the actuation path. Valve control according to one of the preceding claims, wherein the actuation path to a valve bridge ( 12 ), whereby the valve bridge ( 12 ) is formed to at least two valves ( 3 ). Procedure ( 40 ) for valve control in an internal combustion engine having the following features: moving ( 41 ) of a cam ( 2 ) of a camshaft so that in an actuating travel an actuating movement for a valve ( 3 ) is effected; and remove ( 42 ) an actuating element ( 4 ) from the actuation path, so that a movement of the cam ( 2 ) not to actuate the valve ( 3 ) leads.

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