Abstract: A switchable support element (1) for a valve train of an internal combustion engine, said support element (1) comprising a housing (2) that can be arranged through an outer peripheral wall (3) in a reception of the internal combustion engine and in whose bore (4) an axially movable inner element (6) extends, a head (5) of the inner element (6) protruding beyond an edge (7) of the housing (2), coupling elements (8) being associated to the inner element (6) for a selective coupling of the inner element (6) in an axially extended position of the inner element (6) to the housing (2), and said inner element (6) being biased by at least one lost motion spring (9) in a direction leading out of the housing (2), wherein the coupling elements (8) are at least one slide which, in case of uncoupling, is positioned in a guide (10) of the housing (2) extending in radial or secant direction and which comprises a flattened upper side (12) starting from a radially inner front end (11) of the slide, and this flattened upper si

Abstract: A switchable support element for a valve train of an internal combustion engine, comprising a housing that can be arranged with an outer peripheral wall in a reception of the internal combustion engine, an axially displaceable pressure piston extending in a bore of the housing, said pressure piston being loaded by a lost motion spring means in a direction leading out of the housing, a head of the pressure piston extending beyond an edge of the housing, and at least one coupling piston extending in a cross-bore of the pressure piston, which can be brought partially into engagement with an entraining surface of the housing for achieving coupling, wherein, starting from an outer front end of the at least one coupling piston, a flattened portion is arranged on an underside of the coupling piston wherein a flattened portion is arranged on an underside of the coupling piston, the entraining surface in the housing per coupling piston is constituted by an underside of a window-like aperture in the bore of the housing

Abstract: An inner lever (1) for a switchable finger lever (2) of a valve train of an internal combustion engine is provided, having a box-like main part (5) with two lateral walls (6), which are connected at a first end (7) by a transverse bar (8), which intrinsically includes a driver surface (9) for a coupling slide that can be guided longitudinally by the outer lever (3), and opposite from the first end (7), the lateral walls (6) have two strongly crimped together, thin-walled arms (10), which each extend in the direction toward the second end (11) of the inner lever (1) to form a longitudinal bar (12). The arms contact each other with their inner sides (15), and between the lateral walls (6), a cam contact surface (16) can be provided. The inner lever (1) made from thin-walled steel sheet metal at least to a large extent using punch-bending techniques.

Abstract: A switchable finger lever (1) of a valve train of an internal combustion engine, said finger lever (1) comprising an outer lever (2) between whose arms (3) an inner lever (4) extends, a support (9) for at least one gas exchange valve being arranged on one end (7), said inner and outer levers (4, 2) extending on a common axle (10) in the region of said one end (7), said finger lever (1) further comprising a lost motion spring means (11) acting between said inner and outer levers (4, 2), said outer lever (2) possessing on the undersurface (8) on another end (12), a contact surface (13) for a support element, a coupling element (14) is arranged above or laterally of said contact surface (13), which coupling element (14), for realizing coupling, can be brought partially into engagement with an entraining surface (15) of an adjoining crossbar (16) of the inner lever (4), wherein the inner lever (4), starting from its crossbar (16) on the another end (12), merges into a box-like open center portion (17) having two

Abstract: According to the present invention, an outer lever (1) of a finger lever (2) that can be switched to different lifts for at least one gas exchange valve is made by a deep drawing method. A salient feature of the invention is that through a special trimming operation of the cup-shaped base body (16) that is formed in a first step of the method, running contact surfaces (14, 15) for cams, preferably high-lift cams, are generated on upper sides (12, 13) of arms (4, 5) of the outer lever (1). Through the deep drawing method of the invention, only relatively low fabrication costs are to be expected.

Abstract: According to the present invention, an outer lever (1) of a finger lever (2) that can be switched to different lifts for at least one gas exchange valve is made by a deep drawing method. A salient feature of the invention is that a cup-shaped base body (16) having an inverse U-shaped cross-section is deep drawn, and opposing running contact surfaces (14, 15) for high-lift cams are created on arms (4, 5) of the outer lever (1) by punching out a bottom (19) of the base body (16). Through the deep drawing method of the invention, only relatively low fabrication costs are to be expected.

Abstract: A switchable support element (1) comprising a housing (2) in whose bore (4) an axially displaceable pressure piston (7) extends, said support element (1) comprising at least one coupling element (8) for an optional coupling of the pressure piston (7) in its axially extended position relative to the housing (2), said pressure piston (7) being biased in an outward direction from the housing (2) by at least one lost motion spring (9).

Abstract: A switchable support element (1) for a valve train of an internal combustion engine, said switchable support element (1) comprising a housing (2) that can be arranged with an outer peripheral wall (3) in a reception of the internal combustion engine, an axially displaceable pressure piston (5) extending in a bore (4) of the housing (2), said pressure piston (5) being loaded by a lost motion spring means (6) in a direction leading out of the housing (2), a head (7) of the pressure piston (5) extending beyond an edge (8) of the housing (2), and at least one coupling piston (10) extending in a cross-bore (9) of the pressure piston (5), which coupling piston (10) can be brought partially into engagement with an entraining surface (11) of the housing (2) for achieving coupling, wherein, starting from an outer front end (12) of the at least one coupling piston (10), a flattened portion (14) is arranged on an underside (13) of the coupling piston (10), the entraining surface (11) in the housing (2) per coupling pist

Abstract: A switchable support element (1) for a valve train of an internal combustion engine, said support element (1) comprising a housing (2) that can be arranged through an outer peripheral wall (3) in a reception of the internal combustion engine and in whose bore (4) an axially movable inner element (6) extends, a head (5) of the inner element (6) protruding beyond an edge (7) of the housing (2), coupling elements (8) being associated to the inner element (6) for a selective coupling of the inner element (6) in an axially extended position of the inner element (6) to the housing (2), and said inner element (6) being biased by at least one lost motion spring (9) in a direction leading out of the housing (2), wherein the coupling elements (8) are at least one slide which, in case of uncoupling, is positioned in a guide (10) of the housing (2) extending in radial or secant direction and which comprises a flattened upper side (12) starting from a radially inner front end (11) of the slide, and this flattened upper si

Abstract: A switchable finger lever (1) of a valve train of an internal combustion engine is provided, including an outer lever (3) and an inner lever (4) that extends between the arms thereof. One end of the outer lever (3) is provided with a contact area (6) for a head of a resting element on the bottom side (5) thereof. A smooth-faced longitudinal recess (7) for a coupling means (8) extends above the contact area (6). Some sections of the coupling means (8) can be engaged with the driving area (9) located on a face (10) of the inner lever (4) when the levers (3, 4) are coupled. The coupling means (8) is provided as a circular cylinder which is freely rotatable in the longitudinal recess (7) that is provided as a bore. The driving area (9) is provided on the inner lever (4) so as to be complementary to the outer envelope (14) of the coupling means (8). Durability in the coupling zone is improved as a result of the fact that the coupling means (8) is freely rotatable.

Abstract: A switchable finger lever (1) for a valve drive of an internal combustion engine is provided. The inner lever (3) of the finger lever includes a piston (6) on one end thereof, that can be longitudinally displaced, and acts as a coupling element. The coupling element can be partially brought into contact with a driving surface (7) of an outer lever (2), and is provided, for example, with a rising radial profile (13) in the coupling region thereof, and from the front (12) in the coupling direction. The driving surface (7) of the outer lever (2) also has a conical contour which follows the profile (13). During coupling, a contact point (K) of the piston (6) is located on the driving surface (7) in a region of half a depth thereof. In this way, the formation of undesired edge supports is prevented during coupling.

Abstract: An inner lever (1) for a switchable finger lever (2) of a valve train of an internal combustion engine is provided, having a box-like main part (5) with two lateral walls (6), which are connected at a first end (7) by a transverse bar (8), which intrinsically includes a driver surface (9) for a coupling slide that can be guided longitudinally by the outer lever (3), and opposite from the first end (7), the lateral walls (6) have two strongly crimped together, thin-walled arms (10), which each extend in the direction toward the second end (11) of the inner lever (1) to form a longitudinal bar (12). The arms contact each other with their inner sides (15), and between the lateral walls (6), a cam contact surface (16) can be provided. The inner lever (1) made from thin-walled steel sheet metal at least to a large extent using punch-bending techniques.

Abstract: The invention proposes a switchable finger lever (1) of a valve train of an internal combustion engine, said finger lever (1) comprising an outer lever (2) between whose arms (3) an inner lever (4) extends, a support (9) for at least one gas exchange valve being arranged on one end (7), said inner and outer levers (4, 2) extending on a common axle (10) in the region of said one end (7), said finger lever (1) further comprising a lost motion spring means (11) acting between said inner and outer levers (4, 2), said outer lever (2) possessing on the undersurface (8) on another end (12), a contact surface (13) for a support element, a coupling element (14) is arranged above or laterally of said contact surface (13), which coupling element (14), for realizing coupling, can be brought partially into engagement with an entraining surface (15) of an adjoining crossbar (16) of the inner lever (4), wherein the inner lever (4), starting from its crossbar (16) on the another end (12), merges into a box-like open center p

Abstract: A switchable finger lever (1) for a valve drive of an internal combustion engine is provided. The inner lever (3) of the finger lever includes a piston (6) on one end thereof, that can be longitudinally displaced, and acts as a coupling element. The coupling element can be partially brought into contact with a driving surface (7) of an outer lever (2), and is provided, for example, with a rising radial profile (13) in the coupling region thereof, and from the front (12) in the coupling direction. The driving surface (7) of the outer lever (2) also has a conical contour which follows the profile (13). During coupling, a contact point (K) of the piston (6) is located on the driving surface (7) in a region of half a depth thereof. In this way, the formation of undesired edge supports is prevented during coupling.

Abstract: A switchable support element (1) comprising a housing (2) in whose bore (4) an axially displaceable pressure piston (7) extends, said support element (1) comprising at least one coupling element (8) for an optional coupling of the pressure piston (7) in its axially extended position relative to the housing (2), said pressure piston (7) being biased in an outward direction from the housing (2) by at least one lost motion spring (9).

Abstract: According to the present invention, an outer lever (1) of a finger lever (2) that can be switched to different lifts for at least one gas exchange valve is made by a deep drawing method. A salient feature of the invention is that a cup-shaped base body (16) having an inverse U-shaped cross-section is deep drawn, and opposing running contact surfaces (14, 15) for high-lift cams are created on arms (4, 5) of the outer lever (1) by punching out a bottom (19) of the base body (16). Through the deep drawing method of the invention, only relatively low fabrication costs are to be expected.

Abstract: A process for producing a wear-resistant coating and a wear-resistant coating on a surfaces of machine or engine parts which are exposed to frictional wear. This has in particular use for internal combustion engines. The coating comprises at least one metal-free, amorphous hydrocarbon layer which includes sp2- and sp3-hybridized carbon applied to the surface of the machine part, for reducing friction and increasing the wear resistance of the surface of the machine or engine part.

Abstract: A finger lever (1) that can be switched for different cam lifts is provided. The finger lever includes an outer arm (2), between whose limbs (3) an inner arm (4) is pivotally mounted. Inside the inner arm (4), starting form one end (9), a blind borehole (16) is provided with a coupling element (5), which can be longitudinally displaced therein and which, in the event of coupling, can be displaced partially under a driver surface (18) of a crossbar (15) of the outer arm (2). Height stopping parts (34) are provided on the inner arm (4) in the form of a simple, finger-like extension of the inner arm (4) at the end (9) thereof which extend out over the crossbar (15).

Abstract: A switchable finger lever (1) of a valve train of an internal combustion engine is provided, including an outer lever (3) and an inner lever (4) that extends between the arms thereof. One end of the outer lever (3) is provided with a contact area (6) for a head of a resting element on the bottom side (5) thereof. A smooth-faced longitudinal recess (7) for a coupling means (8) extends above the contact area (6). Some sections of the coupling means (8) can be engaged with the driving area (9) located on a face (10) of the inner lever (4) when the levers (3, 4) are coupled. The coupling means (8) is provided as a circular cylinder which is freely rotatable in the longitudinal recess (7) that is provided as a bore. The driving area (9) is provided on the inner lever (4) so as to be complementary to the outer envelope (14) of the coupling means (8). Durability in the coupling zone is improved as a result of the fact that the coupling means (8) is freely rotatable.

Abstract: According to the present invention, an outer lever (1) of a finger lever (2) that can be switched to different lifts for at least one gas exchange valve is made by a deep drawing method. A salient feature of the invention is that through a special trimming operation of the cup-shaped base body (16) that is formed in a first step of the method, running contact surfaces (14, 15) for cams, preferably high-lift cams, are generated on upper sides (12, 13) of arms (4, 5) of the outer lever (1). Through the deep drawing method of the invention, only relatively low fabrication costs are to be expected.