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:
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:
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:
A finger lever for a valve drive of an internal combustion engine which finger lever is contacted in a central region by a control cam and cooperates at one end with a gas exchange valve in the opening direction while being pivoted at another end by a bore on a shaft for pivoting relative to a cylinder head of an internal combustion engine by means projecting radially beyond a peripheral surface of a shaft in the region of a surrounding cam follower.
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) 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 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, on which underside the at least one coupling piston can be displaced with said flattened portion for achieving coupling, and the pressure piston comprises an anti-rotation device relative to the housing, while the at least one coupling piston comprises an anti-rotation device relative to the cross-bore.
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 portion (17) having two bar-shaped arms (18) that, in a direction toward the one end (7), comprise crossbar sections (19) that are strongly bent toward each other and extend further in form of a single, thin-walled bar (21) that surrounds the axle (10) in a central region of the axle (10), the outer lever (2) comprises a box-like open center portion (22) comprising the bar-shaped arms (3) between which the center portion (17) of the inner lever (4) extends, these bar-shaped arms (3) extend further in direction of the one end (7) in form of transversal sections (23) that are strongly bent toward each other and end in two parallel fingers (24) while being arranged through bores on the axle (10), and wherein the outer lever (2) adjoins the inner lever (4) in a substantially wall-against-wall engagement.
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 relates to a rocker actuator (1) switchable to different cam travels. The inventive rocker actuator (1) comprises an external lever (2) which is arranged between the arms (3) and to which an internal lever (4) is pivotally connected. Said invention is characterised in that longitudinally movable connecting means (5) are arranged in the internal lever (4) at the level of the end (9) thereof and that said means are inward displaceable in the direction of the end (9) in such a way that they are meshed under the surface of the pusher dog (18) of the transversal element of the external lever (2)