DE102018119267A1 - Device for actuating sliding locking means - Google Patents

Abstract

A device for actuating displaceable locking means (12) interacts with switchable lever-like cam followers (6, 6 ', 6 ", 6' ''), by means of which gas exchange valves (14) assigned the same function as a cylinder unit (I, II) within a cylinder head of a reciprocating internal combustion engine , 14 ', 14 ", 14' '') can be actuated. The cam followers (6, 6 ', 6 ", 6' '') each consist of a primary lever (11) and a secondary lever (9), which are connected to one another via a pivot axis and can be coupled to one another via the displaceable locking means (12) the secondary lever (9) in its decoupled state is separated from the primary lever (11) in terms of movement and is connected to the primary lever (11) in terms of movement in its coupled state extend in the longitudinal direction of the cylinder head and can each be actuated by means of an actuator (16, 17) to create an actuation of a locking means for a switchable cam follower, which can be arranged in a spatially advantageous manner on the cylinder head, can be used universally within a series of internal combustion engines and is inexpensive affects the operation of the internal combustion engine, each of the actuating elements (19, 19 ') should be exclusively one it can be assigned to the cylinder unit (I, II) and serve to actuate at least two cam followers (6, 6 'or 6 ", 6"') of functionally identical gas exchange valves (14, 14 'or 14 ", 14" "), each actuating element (19, 19 ') being linearly displaceable via an armature (33) of the actuator (16, 17).

Description

Field of the Invention

The invention relates to a device for actuating displaceable locking means, which interacts with switchable lever-like cam followers, via which functionally identical gas exchange valves assigned to a cylinder unit can be actuated within a cylinder head of a reciprocating internal combustion engine, the cam followers each consisting of a primary lever and a secondary lever, which are connected to one another via a pivot axis are connected and can be coupled to one another via the displaceable locking means, the secondary lever in its decoupled state being motionally separated from the primary lever and in its coupled state being motionally connected to the primary lever, and with the locking means interacting actuating elements which extend in the longitudinal direction of the cylinder head and in each case can be actuated by means of an actuator.

State of the art

Lever-like cam followers, which are designed as rocker arms, rocker arms or rocker arms, are used in valve drives of internal combustion engines in order to transfer the cam stroke of a cam of a camshaft as a component of a valve train to the corresponding gas exchange valve designed as an intake or exhaust valve, so that the gas exchange valve due to the Cam stroke is moved against the force of a valve spring in its open position, from which it reaches its closed position by the spring force of the valve spring. In internal combustion engines with four gas exchange valves per cylinder unit, two functionally identical gas exchange valves, namely two intake valves and two exhaust valves, are provided in the cylinder head for these. The cam followers consist of a lever manufactured as a non-cutting sheet metal part or as an investment casting.

If the cam follower is a rocker arm, it is supported at one end by a spherical cap provided on it by means of a support element having a spherical head on the cylinder head of the internal combustion engine. If, on the other hand, it is a rocking lever, the lever is articulated on a horizontally running shaft, via which lubricating oil is also fed to a plug-in element for hydraulic valve clearance compensation. Swing levers are usually provided as double levers with a common cam roller and thus serve to actuate two gas exchange valves. In addition, the lever-like cam follower can also be designed as a rocker arm which is pivotably arranged as a two-armed lever on a rocker arm axis.

To reduce the exhaust gas emission and the consumption of the reciprocating piston internal combustion engine, valve drives are designed to be switchable, with switching devices provided for this purpose switching the valve train between two different valve strokes and possibly two different valve stroke profiles. In the case of switch-off devices, on the other hand, the actuation of the gas exchange valve is only switched off, that is to say a so-called zero stroke is realized, in which the associated gas exchange valve does not open although a cam of a rotating camshaft actuates the rocker arm on the secondary lever, but its movement does not affect the one with the Gas exchange valve cooperating primary lever is transmitted.

Both in a switch-off device and in a switch-over device, locking means serve for the optional coupling of components of the rocker arm or rocking lever, these locking means generally having a single-acting hydraulic actuation, that is to say they are held in a first position by spring force and are mostly from this moved to a second position by hydraulic pressure.

Furthermore, switchable rocker arms can have cam contacts on both the primary and secondary lever side, so that in addition to the main lifting cam that mostly interacts with the secondary lever, at least one additional, but usually two auxiliary lifting, switchover or basic circle cams arranged on both sides of the main lifting cam are provided. A changeover cam can have a radial extension that corresponds to a base circle of the main lift cam.

Switchable rocker arms, which essentially consist of an outer lever serving as a primary lever and an inner lever serving as a secondary lever and are therefore designed in accordance with the aforementioned type, are used as part of a valve train of an internal combustion engine to actuate functionally identical gas exchange valves, and are from the US 6,499,451 B1 known. The outer lever with its side walls and transverse webs at the ends engages around the inner lever, which is provided with a sliding surface for the start of a first cam of a camshaft. Furthermore, cam contact surfaces are provided on the two upper edges of the side walls of the outer lever, which interact with second cams of a camshaft. On its underside, the rocker arm has a contact surface for a gas exchange valve at one end and one at the opposite end Spherical cap, a spherical head of a support element engaging the latter. Both levers are connected to each other at the end at which the contact surface is located via a common pivot axis. In addition, the outer lever has a housing in which a spring-loaded locking piston is slidably guided. In a locked position of the rocker arm, the locking piston moves the inner lever with the outer lever, ie when the cam of the camshaft actuates the inner lever on its sliding surface, the gas exchange valve is opened.

In an unlocked position of the rocker arm, the inner lever is separated in terms of movement from the outer lever and can execute a swiveling movement to it via the swivel axis. Therefore, the inner lever will actuate the first cam, but not the outer lever and the gas exchange valve attached to it. Depending on the configuration of the valve drive, an opening movement of the gas exchange valve can take place via a further cam which interacts with the outer lever and which should have a different cam contour. The actuation of the locking piston biased into its unlocking position by means of a compression spring takes place by means of an electromagnetic actuator inserted into a valve drive housing, which is assigned to each rocker arm and the armature of which extends transversely to an actuating element which is rotatably mounted in the valve drive housing. In this case, a shaft receives a first swivel lever which interacts with the armature and a second, flexibly designed swivel lever which is connected to the armature in a rotationally fixed manner and which are spaced apart in the longitudinal direction of the shaft. If a force is applied to the first pivoting lever by the armature displaced in its longitudinal direction, this leads to a pivoting movement of the second pivoting lever, which acts on a curved tab of the locking piston and shifts it into its locking position.

Furthermore, from the DE 10 2016 220 859 A1 a valve train is known in which two functionally identical gas exchange valves are provided for each cylinder unit, each of which is actuated via a switchable rocker arm. The rocker arm also consists of an outer and an inner lever, which are connected at one end via a pivot axis. At the end of the rocker arm opposite the pivot axis, a locking piston is displaceable in a hole in the outer lever perpendicular to the axis of rotation via a switching pin between two positions, namely once into a position in which the outer lever is locked with the inner lever and on the other hand into a position in which unlocks the outer lever from the inner lever.

A cam roller is provided on the inner lever and forms a cam contact surface. The outer lever is supported with one end on the shaft of the gas exchange valve to be actuated and with its other end on a support element, usually on a hydraulic support element. Furthermore, this valve drive has a guide piece, which is designed as a traverse and extends above the valve drive over the length of the cylinder head and is fastened to the cylinder head parallel to the camshaft. This is designed as a bar that holds an electromagnet as an actuator for each switchable rocker arm. Between the actuator and the switching pin, a connecting element in the form of an anchor rod is provided, which is formed at its end facing away from the actuator as a so-called sliding wedge, an inclined plane of the sliding wedge between the cam roller and one end of the rocker arm engaging in it from above, and this by a Compression spring preloaded locking means adjusted.

Disclosure of the invention

It is an object of the present invention to provide an actuation of a locking means for a switchable cam follower which can be arranged in a spatially advantageous manner on the cylinder head, which can be used universally within a series of internal combustion engines and which has a favorable effect on the operation of the internal combustion engine.

This object is achieved by the features of the characterizing part of independent claim 1. Advantageous refinements are given in the dependent claims, which can be taken individually or in various combinations with one another to represent an aspect of the invention.

Thereafter, a device for actuating displaceable locking means is provided, which cooperates with switchable lever-like cam followers and via which gas exchange valves which are functionally identical and which are assigned to a cylinder unit, can be actuated within a cylinder head of a reciprocating piston internal combustion engine. These are functionally identical inlet valves and functionally identical exhaust valves. The cam followers each consist of a primary lever and a secondary lever, which are connected to one another via a pivot axis and can be coupled via the displaceable locking means. The secondary lever in its decoupled state is separated in terms of movement from the primary lever and in its coupled state is connected in movement with the primary lever. The device also has actuating elements which interact with the locking means and which extend in the longitudinal direction of the cylinder head, that is to say run parallel to the camshaft.

According to the invention, it is provided that each of the actuating elements is exclusively assigned to a cylinder unit and is used to actuate at least two cam followers of functionally identical gas exchange valves and that each actuating element is linearly displaceable via an armature of the actuator. By designing the control element according to the invention as a slide bar with drivers arranged on it, an overall space-saving arrangement can be realized.

The cam followers arranged on each side of the cylinder head, which are used to actuate functionally identical gas exchange valves, are assigned several actuating elements, each interacting with an actuator in the aforementioned manner, each actuator consequently having an actuator and switching only the cam followers provided for a cylinder unit with functionally identical gas exchange valves. One reason for this is that the exhaust or intake valves have to be switched off and on independently for each cylinder unit in a so-called rolling cylinder deactivation for thermodynamic reasons. A systematic change of the cylinder unit to be switched off is advantageous for an independent actuation or switching off of the gas exchange valves regardless of the firing sequence. The rolling shutdown, in which the same cylinder units are not always switched off or over, is thermodynamically necessary, since the individual cylinder units do not always run at the same time.

This improves engine runout and reduces engine wear. Likewise, when comparing a rolling cylinder deactivation with a static cylinder deactivation that has a common control element for several cylinder units, it can be found that during the rolling deactivation, a portion of the operation of the internal combustion engine in the deactivation mode is up to 30% higher, resulting overall in a significant improvement in the efficiency of the internal combustion engine results.

In contrast to the solution according to the invention, the control element in the device according to the US 6,499,451 B1 designed as a pivoted lever which is spaced apart and connected to one another via a sleeve, the first pivoted lever being actuated by the actuator thus actuating the second pivoted lever which engages a link element of the locking piston. An actuator is provided for each rocker arm. In the arrangement according to the DE 10 2016 220 859 A1 this is also the case. In this case, the sliding wedge actuated by the actuator interacts as an inclined plane with the locking means biased by a compression spring. An actuator and an actuator with the features of the present invention are not provided in what is known from the two publications.

According to a development of the invention, each of the actuating elements should be operable by an armature of an actuator extending transversely thereto, an angular drive converting the actuating movement of the armature into a longitudinal movement of the actuating element being arranged between the armature and the actuating element extending transversely thereto. This makes it possible to arrange the functional units actuator and actuator in a structurally advantageous manner in the cylinder head. The coil and thus the power supply to the actuator can advantageously be located outside the valve train housing.

Advantageously, the actuating element interacting with the cam followers of a cylinder unit can also be designed as a sliding ledge on the cylinder head, to which at least two drivers are connected, a free end of each of the drivers interacting with the locking means or with a control slide actuating the locking means and wherein the slide bar extends between the drivers of the two outer cam followers, as seen in the longitudinal direction of the cylinder head. The individual slide rails assigned to each of the cylinder units can be arranged on one side of the cylinder head in the same longitudinal plane, insofar as they are provided for the valve trains of gas exchange valves with the same effect.

If, for example, two exhaust valves are actuated via the corresponding cam followers, the individual push strips are each provided with two drivers, which are preferably designed as leaf springs. The slide bar is designed as a relatively thin-walled component, which results in the possibility of arranging such a device consisting of a plurality of slide bars arranged one behind the other in a space-saving manner on both longitudinal sides of a cylinder head.

In a further embodiment of the invention, it is provided that the armature actuates a push rod which extends essentially coaxially with it, which has a bevel forming the bevel gear at its end facing away from the armature, and that the bevel interacts with an abutment surface of the slide bar via an actuating piston. The armature of the electrically controllable stroke actuator acts on an anchor rod arranged in the latter, the end face of which rests against an end face of the push rod. The other end of the push rod has the inclined plane, which preferably extends at an angle of 45 °. The contact surface of the control element can also have a slope, the angle of which in this case would correspond to that of the slope of the push rod. However, by changing the contact angle of the two slopes, the translation between the stroke of the actuator and the travel of the actuator can be influenced.

The contact surface can also be formed by a rolling element which is mounted in the control element. As part of a kinematic reversal, the rolling element can of course also be mounted on the push rod, while the actuating element has the corresponding incline. The rolling element can advantageously be designed as a ball, which is received by a calotte provided in the adjusting element.

In a further embodiment of this arrangement according to the invention, the contact surface should be formed on an angled portion of the slide bar. The bend can be aligned in the opposite direction to the drivers. Depending on the intended arrangement of the actuator, the bend at the end of the slide bar can be produced from the flat material used for this or at an intermediate point between the ends by an element placed on the slide bar. The actuator can be arranged in a valve cover closing the valve train housing or in a side wall of the valve train housing.

In addition, the drivers should preferably be designed as leaf springs which have an angled fastening section, transversely extending slot-shaped recesses being provided in the push bar and with the respective fastening section being guided through them and being positively connected to the push bar. Each of these leaf springs assumes the function of an intermediate storage element which prestresses the respective locking means, which is preferably designed as a locking piston, on the basis of the corresponding locking position of the actuating element. Since the cam followers assume different positions due to the firing order of the internal combustion engine, the locking means is only moved into its locking position by the pretensioned leaf spring when it is aligned with a driving surface of the secondary lever provided for locking.

If, as further provided, the slide bar forms a structural unit together with the at least two drivers and a spring means serving as a return spring, this can be delivered prefabricated for the assembly of the valve train. Within a series of internal combustion engines, there are many identical parts regardless of the number of cylinder units, so that costs can be saved. The return spring can be designed as a compression spring, which is supported on the one hand on a cantilever arm fixed transversely to the slide rail and on the other hand on a support element which can be fixed in position within the cylinder head. A helical spring can be provided as a compression spring, which is guided on a telescope. A first cylinder of the telescope is connected to the support element and a second cylinder guided thereon to the cantilever.

Finally, an actuating means of the locking means should be designed as a control slide, which runs parallel to the pivot axis and is actuated by means of the adjusting element via the driver, to which the locking means designed as a locking piston runs transversely, with a link being provided between the control slide and the locking piston. By means of the at least two leaf springs actuated by the actuator via the actuating element, the control slides of the rocker arms which run parallel to the actuating element and which are arranged in the primary lever of the rocker arm are thus displaced.

The respective link transmits this displacement path to the locking piston, which in its locking position engages under one end of the secondary lever or engages in a locking hole. If, on the other hand, the control element is moved into its other position, the aforementioned transmission elements ensure that the locking piston is disengaged from the secondary lever in this unlocking position.

The invention is not restricted to the specified combination of the features of independent patent claim 1 and the dependent claims. There are also further possibilities for combining individual features, in particular when they result from the patent claims, the following description of the exemplary embodiments or directly from the figures. In addition, the reference of the claims to the figures by the use of reference numerals should in no way limit the scope of protection of the claims to the illustrated exemplary embodiments.

list of figures

• 1 als perspektivische Darstellung einen aus einer Nockenwelle, schaltbaren Nockenfolgern und Gaswechselventilen bestehenden Ventiltrieb einer Brennkraftmaschine mit einer erfindungsgemäßen Vorrichtung zur Betätigung verschiebbarer Verriegelungsmittel, die jeweils einer Zylindereinheit der Brennkraftmaschine zugeordnet sind,
• 2 als perspektivische Darstellung, eine Draufsicht auf einen gemäß der 1 ausgebildeten Ventiltrieb,
• 3 eine perspektivische Darstellung eines für die Vorrichtung verwendeten Stellelements, das als Schubleiste ausgebildet ist und zwei Mitnehmer aufnimmt,
• 4 einen Längsschnitt durch einen gemäß den 1 und 2 verwendeten Aktuator mit einem von diesem im rechten Winkel ausgehenden Betätigungskolben in einer Schaltstellung,
• 5 einen Längsschnitt durch eine Teilansicht eines schaltbaren Schlepphebels im Bereich von dessen mit einer Kugelkalotte und einem Verriegelungsbolzen versehenen Ende und
• 6 als perspektivische Darstellung eine Teilansicht eines Zylinderkopfes mit einem gemäß den 1 und 2 ausgebildeten Ventiltrieb sowie erfindungsgemäßen Vorrichtungen zur Betätigung verschiebbarer Verriegelungsmittel.

To further explain the invention, reference is made to the drawings, in which an exemplary embodiment is shown in simplified form. Show it:

• 1 as a perspective view of a valve train of an internal combustion engine consisting of a camshaft, switchable cam followers and gas exchange valves with an inventive device for actuation displaceable locking means, which are each assigned to a cylinder unit of the internal combustion engine,
• 2 as a perspective view, a plan view of a according to the 1 trained valve train,
• 3 2 shows a perspective illustration of an adjusting element used for the device, which is designed as a slide bar and accommodates two drivers,
• 4 a longitudinal section through a according to the 1 and 2 used actuator with an actuating piston extending from it at a right angle in a switching position,
• 5 a longitudinal section through a partial view of a switchable rocker arm in the region of which is provided with a spherical cap and a locking bolt and
• 6 a perspective view of a partial view of a cylinder head with a according to the 1 and 2 trained valve train and devices according to the invention for actuating displaceable locking means.

Detailed description of the drawing

In the 1 1 denotes a valve train of an internal combustion engine, which in this case has two cylinder units I and II assigned and, for example, to be arranged on the exhaust valve side within a cylinder head. For better understanding is in the 1 and 2 the valve train 1 without the cylinder head receiving this. Inside the cylinder head is said to be over pedestals 2 and 3 a camshaft preferably designed as an exhaust camshaft 4 be stored over cams 5 . 5 ' . 5 ' and 5 '' with cam followers 6 . 6 ' . 6 " and 6 '" interacts. This cam follower 6 . 6 ' . 6 " and 6 '" are switchable rocker arms 7 . 7 ' . 7 " and 7 '' formed, each one on a cam contour of the corresponding cam 5 . 5 ' . 5 ' and 5 '' rolling cam roller 8th , the cam roller 8th receiving secondary lever 9 and one on a support element 10 supported primary lever 11 exhibit. The primary lever 11 and the secondary lever 9 are pivoted together and each have a sliding locking means 12 can be coupled together. Furthermore, there are rocker arms on each switchable 7 . 7 ' . 7 " and 7 '' Lost motion springs 13 provided the secondary lever 9 opposite the primary lever 11 towards the cam 5 . 5 ' . 5 ' and 5 ' Pretension. The rocker arms 7 . 7 ' . 7 " and 7 '' operate functionally identical gas exchange valves 14 . 14 ' . 14 " and 14 '' , with the respective primary lever 11 via a non-illustrated contact surface with a valve stem end of these gas exchange valves 14 . 14 ' . 14 " and 14 '' interacts.

As from the 1 emerges are the gas exchange valves 14 and 14 ' such as 14 " and 14 "' in pairs one of the cylinder units I respectively. II assigned to the internal combustion engine. In addition, according to the 2 also for the other cylinder units III and IV the case. As also not shown in the figures, runs in such a valve train with four gas exchange valves per cylinder unit I respectively. II a further camshaft provided as an intake camshaft parallel to the camshaft 4 to preferably operate in the same way serving as intake valves gas exchange valves. At one end of the rocker arm visible in the illustration 7 . 7 ' . 7 " and 7 '' is in the primary lever 11 a spool 15 guided longitudinally to which the locking means 12 runs at a right angle.

Above the rocker arms provided in pairs 7 / 7 ' such as 7 " / 7 '' is an actuator 16 and 17 provided that in the corresponding arrangement of the valve train 1 should be fixed in a cylinder head preferably within a valve cover. This perpendicular to the pivot axis of the respective rocker arm pairs 7 / 7 ' and 7 " / 7 '' arranged actuators 16 and 17 related to the 4 to be described in more detail, have a parallel to the camshaft 4 extending actuating piston 18 on.

Furthermore, each of the two cylinder units I and II an actuator 19 and 19 ' assigned that as a slide bar 20 respectively. 20 ' is executed. The formation of these two push bars 20 and 20 ' and their function should be based on the slide bar 20 are explained: After that is the drawer 20 via a hold-down 21 on the bearing block 2 the camshaft 4 led and has a bend 22 on which the actuating piston 18 of the actuator 16 attacks. When the actuator is energized 16 consequently becomes the slide bar 20 about the bend 22 moved in the direction of the arrows shown. With the drawer 20 are also two drivers designed as leaf springs 23 and 23 ' connected to the end faces of the respective spool 15 attack.

As can be seen from the illustration, the longitudinal extension of the slide bar is 20 such that the carriers attached to it 23 and 23 ' the intended adjustment operations on the control spools 15 of the two rocker arms 7 and 7 ' can execute. It must be ensured that the drawer 20 the cylinder unit I not with the corresponding slide rail of the cylinder unit II collides if these two are actuated differently. It also extends into a right Angle from the drawer 20 from a cantilever 24 which has a return spring 25 at a fixed location on the bearing block 2 provided support element 26 is supported.

In the 2 are in the context of a partial view of a valve train of an internal combustion engine in addition to the two cylinder units I and II further cylinder units III and IV shown, which are identical both in terms of the design of the valve train and the design and operation of the device according to the invention. In this respect, 2 the same reference numerals are used for identical components. For the other cylinder units III and IV the previously explained components of the device are not provided with additional reference numerals.

The in the valve train after the 1 and 2 used drawer 20 is in the 3 shown on an enlarged scale as a unit. The drawer bar 20 whose length depends on the dimensions of the cylinder units I and II as well as the distance between the rocker arms 7 and 7 ' should be matched, is at one end with the bend 22 provided, as in 1 shown, by means of the actuating piston 18 , for example the actuator 16 , is pressed. At predetermined intervals are in the drawer 20 two slit-shaped recesses 27 and 27 ' provided by the carriers 23 and 23 ' are passed through. Angled sections 28 and 28 ' these are attached to the drawer by a riveting process 20 attached.

Furthermore is on the side of the drawer 20 the cantilever made from a flat iron 24 attached. A telescope 29 by the return spring 25 is surrounded, on the one hand engages on the support element 26 and on the other hand on the cantilever 24 at, the support element 26 sleeve-like and designed as an abutment and on the bearing block 2 is attached. The structural unit thus formed can be assigned to the individual cylinder units, at least within a series of internal combustion engines, the device being controlled and actuated separately.

In the 4 is, for example, the actuator 16 shown in longitudinal section, in which case it is in an activated, ie energized state. In this state the actuator 16 a locked state of the cam followers 6 and 6 ' , so the rocker arm 7 and 7 ' causes. The in 4 shown actuator 16 should, as in the 1 and 2 shown, essentially at right angles to the actuated actuating element 19 be arranged. The following is based on the 4 the structure of the actuator 16 and the transfer of its actuating movement to the drawer 20 explained: Then it consists of a housing 29 that at one end with a recording dome 30 connected is. Inside the case 29 are a coil 31 , a pole core 32 and an anchor 33 arranged. The anchor 33 takes an anchor rod 34 on that through the polar core 32 is passed through. With one face 35 lies through the polar core 32 passed end of the anchor rod 34 on an end face 36 a push rod 37 at, the push rod 37 longitudinally movable in a mounting hole 38 of the recording dome 30 is led.

One from the anchor rod 34 opposite end of the push rod 37 is with a slant 39 provided with that in a cross hole 40 of the recording dome 30 arranged actuating piston 18 interacts. A contact surface of the actuating piston 32 on which this from the slant 39 is actuated in this case as a ball 42 trained, being a spherical cap 43 of the actuating piston 18 this ball 42 takes up and is radially supported on a portion of the lateral surface. With an end face 44 by the contact surface 41 or the ball 42 is facing away, the actuating piston 18 as in the 1 and 2 shown with the as a slide bar 20 respectively. 20 ' trained actuator 19 respectively. 19 ' interact. The entire arrangement of the push rod 37 and the actuating piston 18 forms a linear drive that transmits linear positioning movements 45 , The actuator should preferably 16 in a valve cover shown in sections 58 a cylinder head (see cylinder head 52 in 6 ) be arranged so that the power connections are outside the corresponding valve housing.

To 5 there is the switchable rocker arm 7 , with which the further rocker arms, for example rocker arms 7 ' . 7 " and 7 '' in 1 , match, from the secondary lever 9 and the primary lever 11 , both of which are articulated at one end. At this end, not shown, which lies opposite the end shown and at which the articulated connection is provided, can be via the primary lever 11 this in 1 shown gas exchange valve 14 . 14 ' . 14 " and 14 "' be operated. This in 5 shown end of the primary lever 11 is with a spherical cap 46 provided, via which this is pivotable on the support element 10 (please refer 1 ) can support.

The rocker arm has at the end opposite the articulated connection 7 the locking means 12 on that a lock of the secondary lever 9 with the primary lever 11 or a physical separation of the two levers 9 and 11 allowed. The locking device 12 consists of a via a compression spring 47 loaded, in the longitudinal direction of the rocker arm 7 extending locking piston 48 that is in a hole 49 of a housing 50 of the primary lever 11 is slidably guided and with one end a transverse yoke 51 of secondary arm 9 reach under, i.e. this on the primary lever 11 can set or release him to this. As can also be seen, the control slide crosses 15 the hole 49 , with both the locking piston 48 as well as the spool 15 should be provided with a backdrop designed as an inclined plane. The interacting backdrops ensure that the spool moves longitudinally 15 a longitudinal movement of the locking piston 48 causes. Alternatively, the corresponding lever-like cam follower can also be provided directly with a transverse locking piston without a control slide, so that it can be actuated directly via the drivers.

In the 6 is a partial view of a cylinder head 52 an internal combustion engine not otherwise shown. This is essentially a representation of a valve housing 53 of this cylinder head 52 , which should be closable by a valve cover, not shown. The cylinder head 52 is for an internal combustion engine with six cylinder units I . II . III . IV . V and VI provided and thus has a corresponding number of devices according to the invention. Here is the 6 that in addition to the previously explained actuators 16 and 17 further actuators 54 . 55 . 56 and 57 are provided, per cylinder unit with an actuator 54 ' . 55 ' . 56 ' and 57 ' interact.

The respective actuator should, as in 4 shown in the valve cover 58 intervention. Alternatively, the actuator can also be in a front side wall of the valve housing 53 be fixed, that is to say run essentially horizontally, so that its installation position is also transverse to the longitudinal extent of the actuating element interacting with it 19 . 19 ' . 54 ' . 55 ' . 56 ' and 57 ' runs.

LIST OF REFERENCE NUMBERS

1

valve train

2

bearing block

3

bearing block

4

camshaft

5

cam

6

cam follower

6 '

cam follower

6 "

cam follower

6 ' "

cam follower

7

cam follower

7 '

cam follower

7 "

cam follower

7 " '

cam follower

8th

cam roller

9

secondary lever

10

supporting

11

primary lever

12

locking means

13

Lost-motion spring

14

Gas exchange valve

14 '

Gas exchange valve

14 "

Gas exchange valve

14 ''

Gas exchange valve

15

spool

16

actuator

17

actuator

18

actuating piston

19

actuator

19 '

actuator

20

push strip

20 '

push strip

21

down device

22

angling

23

takeaway

23 '

takeaway

24

cantilever

25

Return spring

26

support element

27

slit-shaped recess

27 '

slit-shaped recess

28

angled section

28 '

angled section

29

casing

30

receiving dome

31

Kitchen sink

32

pole core

33

anchor

34

anchor rod

35

Front of 34

36

Face of 37

37

pushrod

38

location hole

39

slope

40

cross hole

42

Bullet

43

spherical cap

44

face

45

radial angle drive

46

Spherical cap from 7 . 7 ' . 7 " . 7 ''

47

compression spring

48

Locking piston from 12

49

drilling

50

casing

51

crosshead

52

cylinder head

53

valve housing

54

actuator

54 '

actuator

55

actuator

55 '

actuator

56

actuator

56 '

actuator

57

actuator

57 '

actuator

58

valve cover

I

cylinder unit

II

cylinder unit

III

cylinder unit

IV

cylinder unit

V

cylinder unit

VI

cylinder unit

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• US 6499451 B1 [0007, 0017]
• DE 102016220859 A1 [0009, 0017]

Claims (10)

Device for actuating displaceable locking means (12), which interacts with switchable lever-like cam followers (6, 6 ', 6 ", 6'''), via which a cylinder unit (I, II, III.) Has the same function within a cylinder head (52) of a reciprocating piston internal combustion engine , IV, V, VI) associated gas exchange valves (14, 14 ', 14 ", 14''') can be actuated, the cam followers (6, 6 ', 6", 6'") each consisting of a primary lever (11) and a secondary lever (9), which are connected to one another via a pivot axis and can be coupled to one another via the displaceable locking means (12), the secondary lever (9) being separated in terms of movement in its decoupled state from the primary lever (11) and in its coupled state in terms of movement with the Primary lever (11) is connected, and wherein with the locking means (12) adjusting elements (19, 19 ', 54', 55 ', 56', 57 ') cooperate, which extend in the longitudinal direction of the cylinder head (52) and each by means of a s actuators (16, 17, 54, 55, 56, 57) can be actuated, characterized in that each of the adjusting elements (19, 19 ', 54', 55 ', 56', 57 ') exclusively a cylinder unit (I, II , III, IV, V, VI) and for actuating at least two cam followers (6, 6 'or 6 ", 6"') functionally identical gas exchange valves (14, 14 'or 14 ", 14"") and that each control element (19, 19 ', 54', 55 ', 56', 57 ') is linearly displaceable via an armature (33) of the actuator (16, 17, 54, 55, 56, 57). Device after Claim 1 , characterized in that each of the actuating elements (19, 19 ', 54', 55 ', 56', 57 ') of the armature (33) of an actuator (16, 17, 54, 55, 56, extending transversely thereto) 57) can be actuated, wherein between the armature (33) and the actuating element (19, 19 ', 54', 55 ', 56', 57 ') extending transversely thereto, the actuating movement of the armature (33) into a longitudinal movement of the actuating element (19, 19 ', 54', 55 ', 56', 57 ') converting angle drive (45) is arranged. Device after Claim 1 , characterized in that the actuating element (19, 19 ', 54', 55) which interacts with the cam followers (6, 6 ', 6 ", 6''') of a cylinder unit (I, II, III, IV, V, VI) ', 56', 57 ') is designed as a sliding ledge (20, 20') which is displaceably guided on the cylinder head (52) and to which at least two drivers (23, 23 ') are connected, a free end of each of the drivers (23 , 23 ') cooperates with the locking means (12) or with a control slide (15) which actuates the locking means (12) and that the slide bar (20, 20') is located between drivers (23, 23 ') of the, in the longitudinal direction of the cylinder head ( 52) seen, two outer cam followers (6 and 6 'or 6 "and 6"') extends. Device after Claim 2 , characterized in that the armature (33) actuates a push rod (37) which extends substantially coaxially with it and which has at its end remote from the armature (33) an incline (39) forming the angular drive (45), and that the incline (39) via an actuating piston (18) cooperates with a contact surface of the slide bar (20, 20 '). Device after Claim 4 , characterized in that the contact surface is formed on an angled portion (22) of the slide bar (20, 20 ') oriented counter to the drivers (23, 23'). Device after Claim 3 , characterized in that the drivers (23, 23 ') are designed as leaf springs which have an angled fastening section (28, 28'), that in the slide bar (20, 20 ') transverse slot-shaped recesses (27, 27') are provided, the respective fastening section (28, 28 ') being guided through it and being positively connected to the slide bar (20, 20'). Device after Claim 3 , characterized in that the slide bar (20, 20 ') forms a structural unit together with the at least two drivers (23, 23') and a spring means serving as a return spring (25). Device after Claim 7 , characterized in that the return spring (25) is designed as a compression spring which is attached to a cantilever arm (24) which is fixed to it transversely to the slide bar (20, 20 ') and on the other hand to a support element (2) which can be fixed within the cylinder head (52). 26) supports. Device after Claim 8 , characterized in that the compression spring is designed as a helical spring which is guided on a telescope (29) connected to the support element (26) and the cantilever arm (24). Device after Claim 1 , characterized in that an actuating means of the locking means (12) is designed as a control slide (15) which runs parallel to the swivel axis and is actuated by means of the adjusting element (19, 19 ') via the driver (23, 23') and to which the locking slide ( 48) trained locking means (12) extends transversely, a link being provided between the control slide (15) and the locking piston (48).

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