Sliding cam system for internal combustion engines comprising an integrated locking element

Abstract

This invention relates to a sliding cam system for an internal combustion engine, the sliding cam system comprising at least one camshaft, an adjusting element, and at least one actuator, wherein the camshaft includes a carrier shaft having a primary sliding cam element and at least one secondary sliding cam element, each sliding cam element being axially slidable relative to the carrier shaft and each including a shift gate having at least one shift groove; wherein the actuator has at least one actuator pin engaging in the shift groove of the shift gate of the primary sliding cam element according to a required switching position of the camshaft; and wherein the adjusting element is parallel to the longitudinal axis of the carrier shaft and is axially slidable in the direction of the longitudinal axis of the carrier shaft, and the adjusting element has at least two connecting pins, each connecting pin cooperating with the shift gate of the associated sliding cam element such that the adjusting element transmits the motion of the primary sliding cam element actuated by the actuator pin to the secondary sliding cam element. The sliding cam system also includes a locking element located on the main sliding cam element, and at least one abutting element that is axially slidable along the longitudinal axis of the bearing shaft. The at least one abutting element contacts the locking element, is fixed in translation and rotation, and is located at a radial distance from the bearing shaft.

Description

Technical Field

[0001] This invention relates to a sliding cam system for internal combustion engines. Background Technology

[0002] For example, a sliding cam system is known from DPMA application 10 2019 107 626.9 and parallel application PCT / EP2020 / 058182, and these two applications, for the purposes of their descriptions, constitute part of the content of this application, such that the features listed therein also constitute features of this application. The aforementioned applications, which are prior art and not yet disclosed, each disclose a sliding cam system for an internal combustion engine having at least one camshaft, the camshaft including a carrier shaft having at least two sliding cam elements. Each sliding cam element includes a shift gate having at least one shift groove, wherein the sliding cam element is axially displaced relative to the carrier shaft by means of at least one actuator pin. At least one adjusting element is arranged parallel to the longitudinal axis of the carrier shaft, wherein the adjusting element is axially displaced in the direction of the longitudinal axis of the carrier shaft. In other words, the adjusting element is axially displaced along the longitudinal axis of the carrier shaft. The adjusting element has at least two connecting pins, wherein a first connecting pin is arranged in the region of a first sliding cam element, and a second connecting pin is arranged in the region of a second sliding cam element. Each connecting pin engages with a shift gate of a corresponding associated sliding cam element, allowing the adjusting element to transmit motion from a first sliding cam element actuated by an actuator pin to a second sliding cam element. Therefore, the sliding cam system allows the axial motion of a regularly switching sliding cam element to be transmitted to at least one additional sliding cam element. Here, "regularly switching" means that the axial motion is actuated by an actuator, particularly an actuator pin. The adjusting element includes at least one receiving element in the form of at least one protrusion, and the carrying shaft has at least one locking element in the form of a disc, which engage with each other in operation to lock the adjusting element between two position changes. Thus, the locking elements form an abutment for the receiving element. Summary of the Invention

[0003] The present invention aims to simplify the aforementioned sliding cam system, particularly to reduce its production cost and advantageously extend its service life. Specifically, the present invention aims to provide a sliding cam system in which the production cost, particularly that of the pushrod and advantageously the entire sliding cam system, is minimized in a simple and economical manner, taking into account existing axial mounting space limitations on the camshaft, and therefore advantageously reducing the number of components with at least equal and advantageously optimized functions.

[0004] The above-mentioned objectives are achieved by the sliding cam system for internal combustion engines of the present invention. Other features and details of the invention can be found in the specification and drawings.

[0005] The sliding cam system for an internal combustion engine according to the invention comprises at least one camshaft, an adjusting element, and at least one actuator. The camshaft includes a carrier shaft having a primary sliding cam element and at least one secondary sliding cam element, each of which is arranged to be axially displaceable relative to the carrier shaft, and each sliding cam element includes a shift gate having at least one shift groove. The actuator has at least one actuator pin that engages in the shift groove of the shift gate of the primary sliding cam element according to a necessary switching position of the camshaft. Here, it is contemplated that the shift groove of the shift gate has an X-shaped shape. However, it is also contemplated that the actuator includes multiple actuator pins, particularly two or three actuator pins, which then engage in the shift groove of the shift gate according to a necessary switching position of the camshaft. Here, it is contemplated that the shift groove of the shift gate has a Y-shaped or V-shaped shape. The adjusting element is arranged parallel to the longitudinal axis of the bearing shaft and is axially displaceable in the direction of the longitudinal axis of the bearing shaft. It has at least two connecting pins, with a first connecting pin located in the region of the primary sliding cam element and a second connecting pin located in the region of the secondary sliding cam element. The connecting pins themselves can take the form of a pin (cylindrical), a protrusion, an extension, a lug, or a similar form that allows engagement in a groove, particularly a shift groove of the sliding cam element. It is conceivable that all the connecting pins of the adjusting element have the same form. Alternatively, it is conceivable that at least two connecting pins of the adjusting element, or each connecting pin, have different designs. Advantageously, the connecting pins extend orthogonally from the lever element of the adjusting element in a direction away from the camshaft, the lever element extending in the longitudinal direction of the camshaft, particularly the bearing shaft of the camshaft. Here, the connecting pins are either molded onto the lever element or formed as part of the lever element, and thus formed or shaped. According to the invention, each connecting pin engages with a shift gate of a correspondingly associated sliding cam element, such that the adjusting element transmits the motion of the main sliding cam element actuated by the actuator pin to the secondary sliding cam element. According to the invention, a locking element on the main sliding cam element is configured to lock the adjusting element between at least two position changes, such that the locking element is axially displaceable along the longitudinal axis of the carrier shaft. Furthermore, at least one abutting element is formed to contact the locking element and is configured to be immovable and rotationally fixed relative to the carrier shaft and radially spaced from the carrier shaft, at least for receiving the axial force transmitted by the locking element. The advantage is that the adjusting element is locked, and the sliding cam element does not perform any unwanted motion, such as motion triggered by impact or vibration. It is also conceivable to provide more than one abutting element, particularly two abutting elements.

[0006] The second connecting pin is arranged on the adjusting element in a manner offset from the first connecting pin in the axial direction of the bearing shaft. The second connecting pin engages with the secondary sliding cam element. More precisely, the second connecting pin engages in the shift groove of the shift gate of the secondary sliding cam element. Due to the axial movement of the adjusting element, which is advantageously configured as a push rod, the second connecting pin is arranged on the side of the shift groove of the secondary sliding cam element. The second connecting pin applies a force to the side of the shift groove of the secondary sliding cam element that causes the secondary sliding cam element to move axially in response to the movement of the primary sliding cam element. It is conceivable that the adjusting element includes a plurality of connecting pins, which engage with other sliding cam elements, particularly secondary sliding cam elements. The advantage of the sliding cam system according to the invention is that the adjusting element has a simple and compact structure. Since the connecting pin of the adjusting element engages in the gate of the sliding cam element, the adjusting element can be arranged close to the bearing shaft, wherein the cam shaft occupies less installation space. The adjusting element, particularly the rod element of the adjusting element, is arranged parallel to the longitudinal axis of the bearing shaft. Therefore, axial movement of the bearing shaft can be easily achieved. Therefore, it is conceivable that the adjusting elements are arranged on the guide rail.

[0007] In one embodiment, at least one abutting element is a cylinder head cover or cylinder head, or may be formed directly or indirectly on the cylinder head cover or cylinder head, particularly on the bearing bridge of the cylinder head for mounting the camshaft. Advantageously, the abutting element then extends in the direction of the camshaft from a rigid member that is particularly immovable relative to the camshaft. Thus, the abutting element is also formed to be immovable, particularly fixed in rotation and translation relative to the camshaft, which rotates / turns about its longitudinal axis and a locking element formed on the camshaft, particularly its main sliding cam element. Thus, the abutting element is a component fixedly arranged on the housing, particularly when mounted or formed on the cylinder head cover.

[0008] In an alternative implementation, the abutment element is formed on the actuator. This advantageously avoids the need for additional components to position the abutment element on the distal side of the actuator. This further reduces the production and potential maintenance costs of the sliding cam system.

[0009] When the abutment element is formed on the actuator, it is conceivable that the abutment element is formed axially close to at least one actuator pin on the actuator, or if the actuator is designed to have two actuator pins, the abutment element is formed between at least two actuator pins, particularly as a protrusion between at least two actuator pins. Here, axially close to the actuator means that, in the longitudinal direction of the load shaft aligned with the actuator, at least one actuator pin and the abutment element are formed adjacent to each other, i.e., directly adjacent to each other. If the actuator has more than two actuator pins, particularly three actuator pins, it is advantageous that two abutment elements are arranged between corresponding actuator pins, such that in the longitudinal (axial) direction of the load shaft, the following arrangement is produced: actuator pin - first abutment element - actuator pin - second abutment element - actuator pin. Thus, at least one abutment element extends from the distal end of the actuator dome in a manner parallel to the extension of at least one actuator in the direction of the camshaft, particularly in the direction of the locking element. Therefore, considering the available space in the dome-shaped region of the actuator, and taking into account the full functional range of the actuator, an optimal arrangement of at least one abutment element is possible. This means that, regardless of the arrangement and design of the abutment element, at least one actuator pin available on the actuator can reliably engage in the shift groove provided for this purpose, so as to allow displacement of the main sliding cam element. This also applies to the design of several actuator pins and / or multiple abutment elements.

[0010] It is conceivable to provide a multi-way actuator with at least two actuator pins, particularly at least three actuator pins, through which a sliding cam element can be moved to at least two axial positions, particularly three axial positions, to allow for different switching positions, especially for different switching positions in two-stage, three-stage, or multi-stage timing control systems for valves. The two actuator pins of the multi-way actuator allow the sliding cam element, connected together by an adjusting element, to move between a total of two axial positions. In this embodiment, at least one cam portion of the corresponding sliding cam element preferably has a lift cam profile and a zero-lift cam profile, or two lift cam profiles with different lift heights. The combination of a multi-way actuator with two actuator pins and a cam portion with two profiles allows for two-stage timing control of the valve to be assigned to the cam portion. In a variant of the multi-way actuator with three actuator pins, the sliding cam element, connected together by an adjusting element, can move between a total of three axial positions. In this embodiment, at least one cam portion of the corresponding sliding cam element preferably has two lift cam profiles with different lift heights and a zero-lift cam profile, or a total of three lift cam profiles with different lift heights. The combination of a multi-way actuator with three actuator pins and cam portions with a total of three profiles allows for three-stage timing control of the valve for the cam portion.

[0011] In another embodiment, it is conceivable that the locking element is formed in the shift groove of the shift gate of the main sliding cam element in the form of a circular or annular disc with a cutout, particularly in the form of a semi-disc or partial disc. The length of the locking element extending in the circumferential direction of the shift groove also depends substantially on the design of the shift groove, and therefore on the length of the shift groove. Specifically, the locking element, in the form of a protrusion, a raised portion, or a projection, extends at least partially radially from the surface of the shift groove. The locking element extends at least partially circumferentially within the shift groove. Thus, the shift groove has a portion in which the locking element is not formed. This portion, which does not have the locking element—this portion correspondingly also corresponds to the area of ​​the cutout / opening—allows the main sliding cam element to shift when at least one actuator pin engages in the shift groove provided for this purpose. This means that, as the main sliding cam element is displaced axially along the longitudinal axis of the bearing shaft, the abutment element—which was originally in contact with the locking element, or resting on the locking element when viewed in the longitudinal direction relative to the bearing shaft—creeps or moves along the portion without the locking element from one side of the locking element to the other.

[0012] In one embodiment, at least one actuator pin, particularly the actuator, and at least two connecting pins, particularly the adjusting element, are offset in the circumferential direction of the bearing shaft, specifically by 90°. Alternatively, other angular offsets are also conceivable, such as angular offsets greater than or less than 90°.

[0013] In one embodiment, the shift gate of the main sliding cam element includes at least one first shift groove for receiving at least one actuator pin and at least one second shift groove for receiving a first connecting pin, wherein a locking element is formed in the first shift groove. To allow the first sliding cam element to move in the axial direction, the actuator pin engages in the first shift groove of the shift gate of the first sliding cam element. The actuator pin is immovable in the axial direction of the bearing shaft. The actuator pin is partially guided in the first shift groove and demarcated by at least one side of the shift groove. The sliding cam element is movable in the axial direction by the contour of the shift groove. The actuator pin is arranged in the shift groove only during displacement.

[0014] According to one embodiment, the first shift groove of the main sliding cam element has at least partially an X-shaped, V-shaped, or Y-shaped profile. Specifically, when an actuator with only a single actuator pin is used to switch the main sliding cam element, the first shift groove has at least partially an X-shaped profile. Therefore, advantageously, when an actuator with at least two actuator pins is used to switch the main sliding cam element, the first shift groove has at least partially a V-shaped or Y-shaped profile. Thus, the main sliding cam element may include a second shift groove for the first coupling pin, arranged such that the adjusting element can be directly moved. Furthermore, it is conceivable that the first shift groove of the main sliding cam element has regions with different radii, each region being assigned to a region of the main sliding cam element, particularly an inlet region, a shifting region, and an outlet region. This results in the smooth entry and exit of at least one actuator pin, particularly the actuator pin currently being engaged, and a substantially smooth shift of the main sliding cam element.

[0015] It is also conceivable that a second shift groove of the main sliding cam element is formed adjacent to the first shift groove, particularly at the axial end of the main sliding cam element adjacent to the first shift groove. The second shift groove is formed as a groove extending over the entire circumference of the main sliding cam element, particularly as an annular groove with a constant radius. A first connecting pin is permanently disposed in the second shift groove, such that axial displacement of the main sliding cam element can be directly transmitted to the adjusting element. More precisely, it is therefore possible that the axial movement of at least one secondary sliding cam element, by time-shifting or phase-shifting, depends only on the shift gate of at least one secondary sliding cam element. Advantageously, the first connecting pin is permanently disposed in the second shift groove. During displacement of the main sliding cam element, the first connecting pin engages with the second shift groove, thereby transmitting the axial movement of the main sliding cam element to the adjusting element.

[0016] It is conceivable that the shift gate of the secondary sliding cam element has at least a partial V-shaped profile. The V-shaped profile is easy to manufacture, for example, by milling. Advantageously, in embodiments with more than one secondary sliding cam element, all secondary sliding cam elements have at least a partial V-shaped profile, wherein each V-shaped profile has a constant radius. Since no inlet or outlet track is required in the secondary sliding cam element, a V-shaped profile with a constant radius is advantageous.

[0017] Advantageously, the load-bearing shaft includes at least a third sliding cam element, and particularly at least a fourth sliding cam element. In this way, the sliding cam system can be used in larger internal combustion engines. It is conceivable that the sliding cam system includes several camshafts.

[0018] According to another embodiment, the shift grooves of the primary sliding cam element and at least one secondary sliding cam element are arranged to be offset from each other by a rotational angle, such that at least one secondary sliding cam element can be displaced relative to the primary sliding cam element in the longitudinal direction of the support shaft by a time offset. It is also conceivable that the shift grooves of the primary sliding cam element and the first and second secondary sliding cam elements are arranged to be offset from each other by a rotational angle. This time-shifted displacement of the secondary sliding cam element allows for a time-shifted effect on valve timing, particularly on the activation and / or deactivation of valves in the cylinders of an internal combustion engine.

[0019] Alternatively, the sliding cam element, particularly the main sliding cam element and at least one auxiliary sliding cam element, may be configured as a double sliding cam element, wherein each sliding cam element in the double sliding cam element is configured to control the valves of two cylinders.

[0020] The valve cam of a single cylinder, particularly a cam portion having one or more cam profiles, and the valve cams of several adjacent cylinders, particularly cam portions having one or more cam profiles, can be arranged on corresponding sliding cam elements, i.e., on a main sliding cam element and at least one secondary sliding cam element. The valve cams of the corresponding sliding cam elements can have different valve lift heights. For example, a double sliding cam element can be used, which includes valve cams of two adjacent cylinders. In other words, the double sliding cam element can be configured to actuate the valves of two adjacent, particularly separate, cylinders. Here, the camshaft can precisely have two double sliding cam elements, wherein each double sliding cam element controls at least one valve of two adjacent cylinders during operation. Such a camshaft can be used in a four-cylinder variant of an internal combustion engine. Alternatively, the sliding cam elements can be configured to control at least one valve of a single cylinder. Here, the camshaft can precisely have three sliding cam elements. Such a camshaft can be used in a three-cylinder variant of an internal combustion engine. For example, a design with three double sliding cam elements is also conceivable.

[0021] Typically, valve cams for associated intake and / or exhaust valves can be arranged on at least one of a sliding cam element or a double sliding cam element, i.e., a primary sliding cam element and at least one secondary sliding cam element. The combination of valve cams for associated intake and exhaust valves on a sliding cam element or a double sliding cam element can be used in internal combustion engines having only one camshaft. These camshafts can, for example, be used as single overhead camshafts (SOHC) in internal combustion engines.

[0022] Preferably, the corresponding cam portion has at least two lift cam profiles, particularly at least three lift cam profiles, for actuating the valve, wherein each lift cam profile includes a different lift height. Therefore, the associated valve can operate in two switching stages. In other words, the associated valve can be actuated at two different lift heights when the sliding cam element is axially displaced. In another variation, the corresponding cam portion can have at least three lift cam profiles with different lift heights. Therefore, the associated valve can operate in a total of three switching stages. The associated valve can thus be set to three different lift heights when the sliding cam element is axially displaced. The described multi-stage control of the cylinder valve allows for increased variability in the valve and therefore the timing control of the internal combustion engine. For example, this enables switching between different operating modes of the internal combustion engine, such as full-load operation and partial-load operation.

[0023] Furthermore, it is conceivable that the cam portion also has at least one zero-lift cam profile for closing the cylinder associated with the valve, wherein the zero-lift cam profile is adjacent to a lift cam profile. The cam portion may include a lift cam profile and an adjacent zero-lift cam profile. Axial displacement of the corresponding sliding cam element, i.e., the primary sliding cam element or the secondary sliding cam element, results in switching between the lift cam profile and the zero-lift cam profile. This corresponds to two-stage control of the valve. Alternatively, the cam portion may have two lift cam profiles with different lift heights and an adjacent zero-lift cam profile. Axial displacement of the corresponding sliding cam element results in switching between the two lift cam profiles or between one of the two lift cam profiles and the zero-lift cam profile. This corresponds to three-stage control of the valve. Other combinations of several lift cam profiles and at least one zero-lift cam profile are possible.

[0024] In the context of this invention, the lift cam profile corresponds to the profile that causes the lift of the associated valve during operation, or is used as a pump cam for actuating an injection pump, or as a brake cam in a truck section. The lift cam profile is part of a lift cam or adjusting cam. A zero-lift cam profile does not cause the lift of the associated valve. A zero-lift cam profile is part of a zero-lift cam. The zero-lift cam profile is preferably circular, particularly cylindrical. The zero-lift cam profile is advantageously used for cylinder deactivation.

[0025] In another embodiment, the main sliding cam element and the (multi-path) actuator are arranged in a first axial region of the carrier shaft, and a first secondary sliding cam element and / or a second secondary sliding cam element are arranged in a second axial region of the carrier shaft adjacent to the first axial region. In another embodiment, the main sliding cam element and the actuator are arranged longitudinally along the carrier shaft between the first secondary sliding cam element and the second secondary sliding cam element, particularly centrally between them, and the first secondary sliding cam element and / or the second secondary sliding cam element are arranged in the second axial region of the carrier shaft adjacent to the first axial region. These different arrangements of the sliding cam elements and actuators allow the sliding cam system to be adapted in a variable manner to corresponding installation conditions and tolerances.

[0026] Furthermore, an internal combustion engine, particularly an electric motor, is disclosed, which has at least one sliding cam system of the type described above. The internal combustion engine described herein can be used in various vehicles.

[0027] It should be understood that, without departing from the scope of the invention, the features mentioned above and those to be explained below can be used not only in the given corresponding combinations, but also in other combinations or individually. Attached Figure Description

[0028] The following description, with reference to the accompanying drawings, explains in more detail the sliding cam system known from the prior art and embodiments of the sliding cam system according to the present invention. The drawings schematically illustrate:

[0029] Figure 1 shows a side view of an embodiment of a sliding cam system known from the cited prior art.

[0030] Figure 2 shows the sliding cam system shown in Figure 1 in a perspective view.

[0031] Figure 3 An embodiment of the sliding cam system according to the present invention is shown in a perspective view.

[0032] Figure 4 A stereoscopic view shows the source Figure 3 The embodiment of the actuator with an abutment element shown in the embodiment of the sliding cam system according to the present invention is illustrated.

[0033] Figure 5 A stereoscopic view shows the source Figure 3 The embodiment of the main sliding cam element in the embodiment of the sliding cam system according to the present invention is shown below.

[0034] Figure 6 Shown in side view Figure 3 A partial embodiment of the sliding cam system according to the present invention is shown.

[0035] Figure 7 Another embodiment of the sliding cam system according to the present invention is shown in a perspective view.

[0036] Figure 8 Shown in a side-top view Figure 7 The embodiment of the main sliding cam element of another embodiment of the sliding cam system according to the present invention is shown below.

[0037] Figure 9 Shown in 3D Figure 8 The embodiment of the main sliding cam element shown is as follows:

[0038] Figure 10 Shown in 3D Figure 7 The embodiment of the abutment element of another embodiment of the sliding cam system according to the present invention is shown, and

[0039] Figure 11 Another 3D view shows Figure 9 The embodiment of the abutment element shown. Detailed Implementation

[0040] In Figure 1 to Figure 11 In this context, components with the same function and operating method use the same reference numerals.

[0041] Figures 1 and 2 illustrate an embodiment of a sliding cam system 1 known from the cited prior art. The sliding cam system 1 includes a support shaft 21. A first sliding cam element, particularly a main sliding cam element 22, and a second sliding cam element, particularly a secondary sliding cam element 23, are arranged on the support shaft 21 to be axially movable relative to the longitudinal axis of the support shaft 21. It is conceivable that more than two secondary sliding cam elements 23 are arranged on the support shaft 21. The support shaft 21 includes three roller bearings 50. A roller bearing 50 is arranged at each axial end of the support shaft 21, and another roller bearing 50 is arranged between the sliding cam elements 22 and 23. The roller bearings 50 are locked by retaining rings 51. The number of roller bearings 50 and retaining rings 51, as well as the positions of the bearing points, are variable. The sliding cam elements 22 and 23 include shift gates 25 and cam portions 26. The shift gate 25 of the main sliding cam element 22 has a first shift groove 27 and a second shift groove 28. The shift grooves 27 and 28 are at least partially V-shaped. In other words, the widths of these two shift grooves 27 and 28 are not constant. Width refers to the spacing between the sides of the shift grooves 27 and 28 in the axial direction relative to the support shaft 21. The sides of the shift grooves 27 and 28 are close to each other in the V-shaped portion. The two shift grooves 27 and 28 are arranged or formed with the same rotation angle. The radius of the first shift groove 27 is greater than the radius of the second shift groove 28. Here, radius refers to the distance from the groove base surface of the first shift groove 27 or the second shift groove 28 to the central longitudinal axis of the support shaft 21. Therefore, the outer diameter of the shift gate 25 and the radius of the groove base surface determine the depth of the groove. The first shift groove 27 includes a stepped portion. In other words, the first shift groove 27 is formed as a protrusion or shoulder. The first shift groove 27 has a varying radius. This means that the first shift groove 27 partially has areas with larger and smaller radii. The variation in radius is stepless. These areas are respectively assigned to the inlet area, outlet area, or shift area. The second shift groove 28 has a constant radius. The width of the second shift groove 28 is smaller than the width of the first shift groove 27.

[0042] Two actuator pins 31 are arranged on the support shaft 21, or extend from the actuator toward the support shaft 21. The actuator pins 31 are generally only capable of movement in one direction orthogonal to the central longitudinal axis of the support shaft 21. The actuator pins 31 are assigned to a first shift groove 27. This means that the actuator pins only engage with the first shift groove 27. The actuator pins 31 are spaced apart from each other in the axial direction of the support shaft 21. Therefore, depending on the position of the main sliding cam element 22, one of the two actuator pins 31 can be introduced into the first shift groove 27 of the main sliding cam element 22. By introducing the actuator pin 31, axial movement of the main sliding cam element 22 can be initiated.

[0043] For this purpose, an actuator pin 31 is introduced into the first shift groove 27. Due to the reduction in groove width, the inserted actuator pin 31 engages with the side of the first shift groove 27 of the main sliding cam element 22. More precisely, the inserted actuator pin 31 applies a force to the side of the first shift groove 27 pointing towards that side. This causes axial displacement of the main sliding cam element 22. Therefore, the direction of displacement depends on the side engaging with the inserted actuator pin 31. Each side of the first shift groove 27 is assigned an actuator pin 31. An adjusting element 40 is arranged parallel to the bearing shaft 21. The adjusting element 40, which can also be referred to as a push rod, is axially movable. The adjusting element is offset by 90° relative to the actuator pin 31. Alternatively, other angular offsets are also conceivable. The adjusting element 40 includes a first connecting pin 41, a second connecting pin 42, and a receiving element 60. The first connecting pin 41 and the second connecting pin 42 are each arranged at the axial end of the adjusting element 40. The receiving element 60 includes three protrusions and is arranged between the axial ends of the adjusting element 40. The connecting pins 41, 42 and the receiving element 60 extend orthogonally to the central longitudinal axis of the bearing shaft 21. The first connecting pin 41 is assigned to the second shift groove 28 of the main sliding cam element 22. The first connecting pin 41 and the second connecting pin 42 are arranged on the adjusting element 40 in a generally rotatable manner. The first connecting pin 41 is permanently engaged with the second shift groove 28 of the first sliding cam element 22.

[0044] A force is applied to the first connecting pin 41 from the side of the second shift groove 28. The adjusting element 40 moves in the direction of the force. Since the adjusting element 40 and therefore the connecting pins 41 and 42 are offset from each other by 90° in the circumferential direction, and the first shift groove 27 and the second shift groove 28 are arranged at the same rotation angle, the displacement of the adjusting element 40 is correspondingly offset or phase-shifted in time.

[0045] The second connecting pin 42 is disposed in the region of the secondary sliding cam element 23. The secondary sliding cam element 23 includes a shift groove 29. The shift groove 29 has a V-shaped portion. The second connecting pin 42 is permanently engaged with the shift groove 29. The shift groove 29 of the secondary sliding cam element 23 is arranged such that the second sliding cam element 23 can be switched relative to the first sliding cam element 22 with a time offset.

[0046] The displacement of the adjusting element 40 causes the second connecting pin 42 to move axially within the shift groove 29. More precisely, the second connecting pin 42 moves toward one side of the shift groove 29. The second connecting pin 42 engages with the shift groove 29 in substantially the same manner as the actuator pin 31 engages with the first shift groove 27 of the main sliding cam element 22.

[0047] The bearing shaft 21 includes a disc-shaped locking element 19. Alternatively, other geometries are also conceivable. The locking element 19 is arranged between the main sliding cam element 22 and the secondary sliding cam element 23. The locking element 19 is axially defined by a receiving element 60. The locking element 19 has a supporting function. The locking element 19 forms an abutment for the receiving element 60. The locking element 19 absorbs forces during the shifting process and thus allows the adjusting element 40 to be fixed. Furthermore, the cooperation between the receiving element 60 and the locking element 19 prevents undesirable displacement of the main sliding cam element 22. The receiving element 60 includes two receiving portions for the locking element 19. The locking element 19 includes a notch. Thus, the adjusting element 40 can move through the disc. For this purpose, the notch is arranged in the region of a corresponding rotation angle. The notch is arranged in the disc such that the adjusting element 40 moves through the notch during axial movement. It is conceivable that the adjusting element 40 also has a spring ball lock (not shown).

[0048] Figure 3 A perspective view of an embodiment of the sliding cam system 1 according to the present invention is shown, which substantially corresponds to the sliding cam system shown in Figures 1 and 2 at least in terms of the functional methods of the sliding cams 22, 23, 24, the actuator 30, and the adjusting element 40, so the features listed therein also apply. Figure 3 The sliding cam system 1 is shown in the figure. Figure 3The embodiment of the sliding cam system 1 shown also includes a camshaft 20 having a support shaft 21 and sliding cam elements arranged on the support shaft 21, specifically a main sliding cam element 22 and two auxiliary sliding cam elements 23 and 24, each arranged to be axially movable relative to the longitudinal axis of the support shaft 21. The sliding cam elements 22, 23, and 24 each include a shift gate 25 and a cam portion 26. The shift gate 25 of the main sliding cam element 22 has a first shift groove 27 and a second shift groove 28. The first shift groove 27 is at least partially X-shaped, V-shaped, or Y-shaped. The width of the first shift groove 27 is not constant. Width refers to the spacing between the sides of the first shift groove 27 in the axial direction relative to the support shaft 21. The sides of the first shift groove 27 are close to each other in the V-shaped or Y-shaped portions. The width of the second shift groove 28 is constant. The first shift groove 27 has a radius that is partially larger than the radius of the second shift groove 28. The radius is the distance from the base surface of the first shift groove 27 or the second shift groove 28 to the central longitudinal axis of the bearing shaft 21. Therefore, the outer diameter of the shift gate 27 and the radius of the base surface of the groove determine the depth of the groove. The first shift groove 27 has a varying radius. This means that the first shift groove 27 partially has areas with larger and smaller radii. The variation in radius is stepless. These areas are respectively assigned to the inlet area, outlet area, or shift area. The second shift groove 28 has a constant radius. The width of the second shift groove 28 is smaller than the width of the first shift groove 27. A locking element 19 is formed between the legs of the X-shaped, V-shaped, or Y-shaped portions of the first shift groove 27. The locking element 19 thus separates the legs of the X-shaped, V-shaped, or Y-shaped first shift groove 27 from each other, such that the locking element 19 is formed in the leg area of ​​the X-shaped, V-shaped, or Y-shaped first shift groove 27 where the legs are spaced apart. In the region where the legs of the first shift groove 27 in an X-shape, V-shape, or Y-shape meet, the locking element 19, which extends at least partially in the circumferential direction, is interrupted. This design is, for example, in... Figure 5 and Figure 6 Further illustrations are provided.

[0049] Figure 3The actuator 30 shown has two actuator pins 31, which are arranged on or extend from the actuator 30 toward the support shaft 21. The actuator pins 31 are essentially movable only in one direction orthogonal to the central longitudinal axis of the support shaft 21. The actuator pins 31 are assigned to a first shift groove 27. This means that the actuator pins 31 engage only with the first shift groove 27. The actuator pins 31 are spaced apart from each other in the axial direction of the support shaft 21. Therefore, depending on the position of the main sliding cam element 22, one of the two actuator pins 31 can be introduced into or engage with the first shift groove 27 of the main sliding cam element 22. Axial movement of the main sliding cam element 22 can be initiated by the insertion of the actuator pin 31.

[0050] For this purpose, an actuator pin 31 is introduced into the first shift groove 27. Due to the reduced groove width, the inserted actuator pin 31 engages with the side of the first shift groove 27 of the main sliding cam element 22. More precisely, the inserted actuator pin 31 applies a force toward the side of the first shift groove 27. This causes axial displacement of the main sliding cam element 22. Therefore, the direction of displacement depends on the side engaging with the inserted actuator pin 31. Each side of the first shift groove 27 is provided with an actuator pin 31. An abutment element 10 is formed between the actuator pins 31. This abutment element 10 extends in the form of a protrusion from the distal end of the actuator dome 32 along the direction of the camshaft 20, and particularly the bearing axis 21 of the camshaft 20, parallel to the actuator pin 31. The abutting element 10 contacts the locking element 19 at least for a portion of the time, and particularly the right or left side of the locking element 19 depending on the switching position, to absorb the axial force of the secondary sliding cam elements 23, 24 actively connected via the adjusting element 40.

[0051] Adjusting element 40 is arranged parallel to the bearing shaft 21. Also referred to as a push rod, adjusting element 40 is axially movable. The adjusting element is offset relative to actuator pin 31, for example, by 90°, specifically by 98°. Alternatively, other angular offsets are conceivable. Adjusting element 40 includes a first connecting pin 41, a second connecting pin 42, and a third connecting pin 43. The first connecting pin 41 and the third connecting pin 43 are each located at an axial end of the adjusting element 40. Connecting pins 41, 42, and 43 extend orthogonally to the central longitudinal axis of the bearing shaft 21. The first connecting pin 41 is assigned to the main sliding cam element 22, specifically the second shift groove 28 of the main sliding cam element 22; the second connecting pin 42 is assigned to the first auxiliary sliding cam element 23; and the third connecting pin 43 is assigned to the second auxiliary sliding cam element 24. If more than two auxiliary sliding cam elements 23 and 24 are arranged on the bearing shaft 21, the adjusting element 40 must accordingly have more connecting pins. The first connecting pin 41 is permanently engaged with the second shift groove 28 of the main sliding cam element 22. The second connecting pin 42 is permanently engaged with the shift groove 29 of the first auxiliary sliding cam element 23, and the third connecting pin 43 is permanently engaged with the shift groove 29 of the second auxiliary sliding cam element 24.

[0052] A force is applied to the first connecting pin 41 from the side of the second shift groove 28. The adjusting element 40 is displaced along the direction of this force.

[0053] The displacement of the adjusting element 40 causes the second connecting pin 42 to move axially within the shift groove 29. More precisely, the second connecting pin 42 moves toward one side of the shift groove 29. The second connecting pin 42 engages with the shift groove 29 in substantially the same manner as the actuator pin 31 engages with the first shift groove 27 of the main sliding cam element 22. The same applies to the third connecting pin 43.

[0054] Figure 4 It shows Figure 3 The figure shows a perspective view of an embodiment of the actuator 30 with abutment element 10 in an embodiment of the sliding cam system 1 according to the invention. The abutment element 10 extends between actuator pins 31, particularly parallel to the actuator pins 31. The abutment element 10 is equidistant from the two actuator pins 31 and is thus centrally formed between them. Advantageously, the abutment element 10 has the form of a protrusion. The abutment element 10 has a length substantially corresponding to the length of the extending actuator pins 31. However, it is also conceivable that the abutment element 10 is formed to be longer or shorter than the actuator pins 31. Viewed in cross-section, it is conceivable that the abutment element 10 has an elliptical or rectangular form (cross-sectional form). However, other offset forms are also conceivable. Similar to the actuator pins 31, the abutment element 10 extends away from the end face of the actuator dome-shaped portion 32.

[0055] Figure 5 It shows Figure 3 The figure shown is a perspective view of an embodiment of the main sliding cam element 22 according to an embodiment of the sliding cam system 1 of the present invention. Figure 3 As shown, the main sliding cam element 22 includes a sliding sleeve 70 having internal longitudinal teeth 71 for being pushed onto the bearing shaft 21 and its external longitudinal teeth. A cam portion 26 and a shift gate 25 are also formed. Each cam portion 26 has an adjusting cam 2 or a lift cam profile 2 and a zero-lift cam 3 or a zero-lift cam profile 3. The shift gate 25 has an X-shaped, V-shaped, or Y-shaped first shift groove 27 and an annular second shift groove 28. A locking element 19 is formed inside the first shift groove 27, extending at least partially circumferentially within the first shift groove 27, and is formed as a protrusion in the form of a slit disc, a semi-disc, particularly a partially disc, preferably extending at least partially circumferentially and orthogonal to the protrusion extending from the bearing shaft 21 or the sliding sleeve 79. The locking element 19 has a first side or left side 19a and a second side or right side 19b. The locking element 19 is not formed continuously in the peripheral direction of the first shift groove 27, but has a cut or recess, especially an opening, in particular to allow the main sliding cam element 22 to shift along the longitudinal axis of the bearing shaft 21.

[0056] Figure 6 It shows Figure 3 A partial side view of an embodiment of the sliding cam system 1 according to the present invention is shown. Figure 6 As shown, in order to receive axial force at least between two shifts of the main sliding cam element 22, the abutment element 10 contacts at least one of the sides 19a and 19b of the locking element 19, i.e., in the current case, the second side or right side 19b. The locking element 19 is formed in the first shift groove 27 of the main sliding cam element 22. When the right actuator pin 31 is inserted into the first shift groove 27, the main sliding cam element 22 moves to the right, causing the abutment element 10 to creep along the cut / opening of the locking element 19 on the first side or left side 19a side of the locking element 19. Therefore, when the left actuator pin 31 is inserted into the first shift groove 27, the main sliding cam element 22 moves to the left, causing the abutment element 10 to creep along the cut of the locking element 19 on the second side or right side 19b side of the locking element 19.

[0057] Figure 7 A perspective view of another embodiment of the sliding cam system 1 according to the present invention is shown, which is at least similar to the sliding cams 22, 23, 24, actuator 30, and adjusting element 40 in terms of their functional methods. Figure 3The sliding cam system 1 shown therein is basically the same, so the features listed there also apply. Figure 6 The sliding cam system 1 shown is illustrated. Figure 6 The embodiment of the sliding cam system 1 according to the invention shown also includes a camshaft 20 having a support shaft 21 and sliding cam elements arranged on the support shaft 21, specifically a main sliding cam element 22 and two auxiliary sliding cam elements 23, 24, each arranged to be axially movable relative to the longitudinal axis of the support shaft 21. Each sliding cam element 22, 23, 24 includes a shift gate 25 and a cam portion 26. The shift gate 25 of the main sliding cam element 22 includes a first shift groove 27 and a second shift groove 28. The first shift groove 28 is at least partially Y-shaped or V-shaped, but may also be S-shaped or X-shaped. The two shift grooves 27, 28 have different widths. Width refers to the distance between the sides of the shift grooves 27, 28 in the axial direction relative to the support shaft 21. The sides of the first shift groove 27 are close to each other, for example in the Y-shaped or V-shaped portion or also in the X-shaped portion. The two shift grooves 27, 28 are arranged at the same rotation angle or formed to have the same rotation angle. The first shift groove 27 has at least partially a larger radius than the second shift groove 28. Here, radius refers to the distance from the base surface of the first shift groove 27 or the second shift groove 28 to the central longitudinal axis of the bearing shaft 21. Therefore, the outer diameter of the shift gate 25 and the radius of the base surface of the groove determine the depth of the groove. The first shift groove 27 advantageously has a varying radius. This means that the first shift groove 27 partially has regions with larger and smaller radii. The variation in radius is stepless. These regions are respectively assigned to the inlet region, the outlet region, or the shifting region. The second shift groove 28 has a constant radius. The width of the second shift groove 28 is smaller than the width of the first shift groove 27.

[0058] Figure 7 The actuator 30 shown has two actuator pins 31, which are arranged on or extend from the actuator 30, particularly the actuator dome 32, toward the carrier shaft 21. The actuator pins 31 are essentially movable only in one direction orthogonal to the central longitudinal axis of the carrier shaft 21. The actuator pins 31 are assigned to a first shift groove 27 of the main sliding cam element 22. This means that the actuator pins only engage with the first shift groove 27. The actuator pins 31 are spaced apart from each other in the axial direction of the carrier shaft 21. Therefore, depending on the position of the main sliding cam element 22, one of the two actuator pins 31 can be introduced into or engage with the first shift groove 27 of the main sliding cam element 22. By introducing the actuator pin 31, axial movement of the main sliding cam element 22 can be initiated.

[0059] For this purpose, an actuator pin 31 is introduced into the first shift groove 27. Due to the continuous decrease in groove width, the inserted actuator pin 31 engages with the side of the first shift groove 27 of the main sliding cam element 22. More precisely, the inserted actuator pin 31 applies a force directed towards the side of the first shift groove 27. This causes axial displacement of the main sliding cam element 22. Therefore, the direction of displacement depends on the path of the side engaging with the inserted actuator pin 31. This is particularly applicable to the use or design of V-shaped or Y-shaped shift grooves. Each side of the first shift groove 27 is assigned an actuator pin 31.

[0060] The adjusting element 40 is arranged parallel to the bearing shaft 21. The adjusting element 40, also referred to as a push rod, is axially movable. The adjusting element is offset by 90°, preferably 98°, relative to the actuator pin 31. Alternatively, other angular offsets are conceivable. The adjusting element 40 includes a first connecting pin 41, a second connecting pin 42, and a third connecting pin 43. The first connecting pin 41 and the third connecting pin 43 are each located at the axial end of the adjusting element 40. The connecting pins 41, 42, and 43 extend orthogonally to the central longitudinal axis of the bearing shaft 21. The first connecting pin 41 is assigned to the second shift groove 28 of the main sliding cam element 22. The first connecting pin 41 is assigned to the main sliding cam element 22, the second connecting pin 42 is assigned to the first auxiliary sliding cam element 23, and the third connecting pin 43 is assigned to the second auxiliary sliding cam element 24. If more than two auxiliary sliding cam elements 23 and 24 are arranged on the bearing shaft 21, the adjusting element 40 must accordingly have more connecting pins. The first connecting pin 41 is permanently engaged with the second shift groove 28 of the first sliding cam element 22. The second connecting pin 42 is permanently engaged with the shift groove 29 of the first sliding cam element 23, and the third connecting pin 43 is permanently engaged with the shift groove 29 of the second sliding cam element 24.

[0061] A force is applied to the first connecting pin 41 from the side of the second shift groove 28. The adjusting element 40 moves in the direction of the force.

[0062] The displacement of the adjusting element 40 causes the second connecting pin 42 to move, and thus also causes the third connecting pin 43 to move axially in the corresponding shift groove 29. More precisely, the connecting pins 42 and 43 move toward one side of the corresponding shift groove 29 of the second or third sliding cam element 23. The second connecting pin 42 engages with the shift groove 29 in substantially the same manner as the actuator pin 31 engages with the first shift groove 27 of the main sliding cam element 22. The same applies to the third connecting pin 43.

[0063] Locking element 19 is formed, for example, at the axial end of main sliding cam element 22, and advantageously has the form of a disc with a cut / recess / opening, or a semi-disc form, particularly a partial disc form. Preferably, the cut takes the form of a protrusion extending at least partially in the circumferential direction and orthogonal to the extension of the bearing shaft 21 or sliding sleeve 79. This is in Figure 8 and 9 As shown in the figure below, the notch of the disc or locking element is formed at the rotation angle of the disc, such that the disc or locking element 19 does not collide with the abutment element 10 when the axial position of the main sliding cam element 22 changes. The locking element 19 has a first side or left side 19a and a second side or right side 19b. During operation of the sliding cam system 1, these sides 19a, 19b are at least partially (alternatingly) contacted by the abutment element 10. Figure 10 and Figure 11 As shown, viewed radially relative to the longitudinal axis of the support shaft 21, the abutment element 10 extends from the retaining element 11 in the direction of the camshaft 20, particularly in the direction of the support shaft 21 of the camshaft 20, in the form of a protrusion. Figure 10 and Figure 11 The retaining element 11 shown in the different perspective views can also be part of the abutting element 10. However, it is also conceivable that the retaining element 11 is a separate component for arranging or securing the abutting element 10. Advantageously, the abutting element 10 extends from the positioning disc 12 of the retaining element 11 in the form of a protrusion. The retaining housing 13 is used to secure the retaining element 11 and thus the abutting element 10 relative to the rotatable and axially displaceable locking element 19. By means of the retaining housing 13, the retaining element 11 and thus the abutting element 10 are arranged, for example, on the bearing bridge of the cylinder head (not shown here) or the cylinder head cover, particularly on a component stationary relative to the camshaft 20. The functional method of interaction between the locking element 19 and the abutting element 10 corresponds to the reference. Figure 3 The explanatory functional method, therefore, in this respect, refers to the Figure 3 The explanation is as follows. Alternatively, it is conceivable that the abutment element 10 is formed as a protrusion / protrusion, particularly as part of the bearing bridge or molded on the bearing bridge, starting from the bearing bridge of the cylinder head cover. Or it is possible that the abutment element 10 is formed as part of the cylinder head cover and extends from the cylinder head cover along the direction of the bearing shaft 21 as a corresponding protrusion.

[0064] Figure 8 and Figure 9 Each showed Figure 7 The image shows a different view of an embodiment of the main sliding cam element 22 according to another embodiment of the sliding cam system 1 of the present invention. (See image for further details.) Figure 7As shown, the main sliding cam element 22 includes a sliding sleeve 70 having internal longitudinal teeth 71, allowing it to be pushed onto the bearing shaft 21 and its external longitudinal teeth. A cam portion 26 and a shift gate 25 are also formed. Each cam portion 26 has an adjusting cam 2 or lift cam profile 2 and a zero-lift cam 3 or zero-lift cam profile 3. The shift gate 25 has a first X-shaped, S-shaped, Y-shaped, or V-shaped shift groove 27 and an annular second shift groove 28. A locking element 19, in the form of a (semi-)disc, particularly a partially disc, is arranged at the axial end of the sliding sleeve 70 or the main sliding cam element 22. The cutout or opening of the disc or locking element 19 is formed at a rotational angle of the disc, and the protrusion of the adjusting cam 2 or lift cam profile 2 is formed at this rotational angle. Advantageously, the cut or opening of the (semi)circular locking element 19 is formed at the rotation angle of the (semi)disc, so that when the axial position of the main sliding cam element 22 changes, the (semi)disc or side 19a, 19b of the (semi)circular locking element 19 will not collide with the abutment element 10.

[0065] List of reference numerals

[0066] 1. Sliding Cam System

[0067] 2. Adjusting cam / lift cam profile

[0068] 3 Zero-lift cam / Zero-lift cam profile

[0069] 10 contact components

[0070] 11 Holding elements

[0071] 12 positioning discs

[0072] 13 Fixed Housing

[0073] 19 locking elements

[0074] 19a First / Left Side

[0075] 19b Second / Right Side

[0076] 20 Camshaft

[0077] 21 bearing shaft

[0078] 22 Main sliding cam element

[0079] 23 (First) Secondary sliding cam element

[0080] 24 (Second) Secondary sliding cam element

[0081] 25 Gear Shift Door

[0082] 26 Cam Section

[0083] 27. First shift groove of the main sliding cam element

[0084] 28 Second shift groove of the main sliding cam element

[0085] Shift grooves of 29 sliding cam elements

[0086] 30 actuators

[0087] 31 Actuator Pin

[0088] 32 Actuator Dome

[0089] 40 Adjustment Elements

[0090] 41 connecting pins

[0091] 42 connecting pins

[0092] 43 connecting pins

[0093] (44 putters)

[0094] 50 roller bearings

[0095] 51 retaining ring

[0096] 60 receiving elements

[0097] 70 sliding sleeve

[0098] 71 Internal longitudinal teeth

Claims

1. A sliding cam system (1) for an internal combustion engine, the sliding cam system (1) having at least one camshaft (20), an adjusting element (40) and at least one actuator (30), wherein, The camshaft (20) includes a carrier shaft (21) having a main sliding cam element (22) and at least one secondary sliding cam element (23, 24), each of the main sliding cam element and the secondary sliding cam element being arranged to be axially displaced relative to the carrier shaft (21) and each including a shift gate (25) having at least one shift groove (27, 28, 29). Furthermore, the actuator (30) has at least one actuator pin (31) that engages in the shift groove (27) of the shift gate (25) of the main sliding cam element (22) according to the necessary switching position of the camshaft (20). Furthermore, the adjusting element (40) is arranged parallel to the longitudinal axis of the bearing shaft (21) and is axially displaceable in the direction of the longitudinal axis of the bearing shaft (21). The adjusting element (40) has at least two connecting pins (41, 42, 43), wherein the first connecting pin (41) is arranged in the region of the main sliding cam element (22), and the second connecting pin (42) is arranged in the region of the secondary sliding cam elements (23, 24). Each connecting pin (41, 42, 43) engages with the shift gate (25) of the corresponding associated sliding cam element (22, 23, 24), such that the adjusting element (40) transmits the motion of the main sliding cam element (22) initiated by the actuator pin (31) to the secondary sliding cam element (23, 24). Its features are, A locking element (19) located on the main sliding cam element (22) is configured to lock the adjusting element (40) between at least two position changes, such that the locking element (19) is axially displaceable along the longitudinal axis of the bearing shaft (21). At least one abutment element (10) is formed to contact the locking element (19) and is configured to be immovable and fixed in rotation relative to the bearing shaft (21) and radially spaced from the bearing shaft (21) to at least receive the axial force transmitted by the locking element (19); the at least one abutment element (10) is formed on the actuator (30) axially close to the at least one actuator pin (31); the locking element (19) is formed in the shift groove (27) of the shift gate (25) of the main sliding cam element (22) in the form of a circular or annular disc with a cut / opening, so as to allow the main sliding cam element (22) to be displaced along the longitudinal axis of the bearing shaft (21).

2. The sliding cam system (1) according to claim 1. Its features are, The at least one abutting element (10) is formed directly or indirectly on the cylinder head cover or cylinder head.

3. The sliding cam system (1) according to claim 2. Its features are, The at least one abutting element (10) is formed directly or indirectly on the bearing bridge of the cylinder head.

4. The sliding cam system (1) according to claim 1. Its features are, The actuator (30) is designed with two actuator pins (31), and the at least one abutment element (10) is formed between the two actuator pins (31) and is formed in the form of a protrusion.

5. The sliding cam system (1) according to any one of claims 1-4. Its features are, The at least one actuator pin (31) and the at least two connecting pins (41, 42, 43) are offset in the circumferential direction of the bearing shaft (21).

6. The sliding cam system (1) according to claim 5 above. Its features are, The actuator (30) and the adjusting element (40) are offset in the circumferential direction of the bearing shaft (21).

7. The sliding cam system (1) according to claim 5 above. Its features are, The offset in the circumferential direction of the bearing shaft (21) is 90°.

8. The sliding cam system (1) according to any one of claims 1-4. Its features are, The shift gate (25) of the main sliding cam element (22) includes at least one first shift groove (27) for receiving the at least one actuator pin (31) and at least one second shift groove (28) for receiving the first connecting pin (41), wherein the locking element (19) is formed in the first shift groove (27).

9. The sliding cam system (1) according to claim 8. Its features are, The first shift groove (27) of the main sliding cam element (22) has at least a partially X-shaped, V-shaped, or Y-shaped profile.

10. The sliding cam system (1) according to claim 8. Its features are, The second shift groove (28) is formed at the axial end of the main sliding cam element (22) adjacent to the first shift groove (27). The second shift groove (28) is formed as a groove extending over the entire periphery of the main sliding cam element (22), particularly as an annular groove with a constant radius. The first connecting pin (41) is permanently arranged in the second shift groove (28) so that the axial displacement of the main sliding cam element (22) can be directly transmitted to the adjusting element (40).

11. The sliding cam system (1) according to claim 8. Its features are, The first shift groove (27) of the main sliding cam element (22) and the shift groove (29) of the at least one secondary sliding cam element (23, 24) are arranged to be offset from each other by a rotational angle, such that the at least one secondary sliding cam element (23, 24) can be shifted relative to the main sliding cam element (22) in a time offset in the longitudinal direction of the bearing shaft (21).

12. An internal combustion engine having at least one sliding cam system (1) according to any one of the preceding claims 1-11.

Images