A buffered cam assembly, which is particularly well-suited for use to provide a clock input for a mechanical computing system, interposes a buffer element between a cam surface and a follower. The buffer element engages the cam surface and acts to significantly reduce the effect of any irregularities in the cam surface on the resulting motion of the follower, allowing the output waveform of movement of the follower to more closely approximate an intended ideal output waveform.

Systems and methods including spacers comprising a first face configured to engage with a cam shaft, a second face, and a third face operationally coupled to the first face and the second face, wherein the third face is configured to displace a lubricating fluid and permit rotation of the cam shaft are disclosed.

A complex cast component of an internal combustion engine, in particular a crankshaft or a camshaft, has a longitudinal axis, a plurality of regions, along the longitudinal axis, and a first cavity. Each of the plurality of regions has a certain cool-down rate during a solidification process of a casting process. The first cavity is arranged in a first region of the plurality of regions and has a volume that depends on a first cool-down rate of the first region. In this way, a material thickness in the first region likewise depends on the first cool-down rate.

A cam pedestal member includes a plurality of three-dimensional cams including a plurality of cam guiding surfaces continuing over a range from a through hole provided at a center of a cam base portion to an outer peripheral side, and being formed upright at a plurality of positions. The cam base portion includes coupling portions coupling the cam pedestal member directly or indirectly to a rotor shaft at plurality of positions in gap areas between radially inner ends and radially outer ends of the adjacent three-dimensional cams.

A variable drive for an internal combustion engine with a first gas exchange valve, in particular outlet valve, and a second gas exchange valve, in particular outlet valve. The variable valve drive has a sliding cam system. The sliding cam system has an axially displaceable cam carrier which, for the first gas exchange valve, has only two cams, namely a first cam and a second cam offset axially with respect thereto, and, for the second gas exchange valve, has only two cams, namely a third cam and a fourth cam offset axially with respect thereto. The first cam, the second cam, the third cam and the fourth cam differ from a zero lift cam. The first cam and the third cam are identical in design. The second cam and the fourth cam differ in design.

This exhaust cam shaft (2) is provided with a shaft part (5) and cam parts (6 to 13) provided on the outer circumference of the shaft part (5). The shaft part (5) has holes (16, 17, 19) opened at predetermined positions on the outer circumferential surface of the shaft part (5). The holes (16, 17, 19) are formed so as to be gradually tapered from an outside of the shaft part (5) toward a center of the shaft part (5) in a radial direction.

A method for positioning a cam element on a shaft segment of a camshaft with an assembly aid element may comprise arranging the shaft segment relative to a first tool such that a first distal shaft segment end of the shaft segment lies flush against a surface of the tool that is directed towards the shaft segment; arranging the cam element on the shaft segment in a pre-position; arranging a first distal end of the assembly aid element to contact the surface of the first tool that is directed towards the shaft segment such that the assembly aid element forms a defined distance to the first tool along a shaft-segment longitudinal axis; and moving a second tool at least in sections along the longitudinal axis until the second tool contacts a second distal end of the assembly aid element, and pushing the cam element by means of the second tool to a final position.

A cam follower device includes: a bearing holding member that has a pair of opposing side walls disposed with a space therebetween and that is arranged with respect to a cam provided on a camshaft; a support shaft inserted into insertion holes provided coaxially in each of the pair of opposing side walls; an outer ring that has the support shaft inserted therethrough, is disposed between the pair of opposing side walls, and faces the cam; an inner ring formed by an outer peripheral surface of the support shaft; and a plurality of rollers disposed in an annular gap between the outer ring and the inner ring.

A method for producing a ready-for-use camshaft for controlling valves of an internal combustion engine may be directed towards camshafts that include a carrier shaft on which an end component, for example, a drive wheel, a phase adjuster, or a part of a phase adjuster, is arranged and cam elements that are attached in a positionally fixed manner to the carrier shaft. In some examples, the method comprises providing a carrier shaft and an end component, joining the end component to the carrier shaft, grinding at least the carrier shaft to form cam seats so as to establish readiness for use, introducing a surface profile into a first cam seat, providing a cam element with ready-for-use characteristics, seating the cam element on the cam seat with the surface profile, and repeating certain steps for additional cam elements.

A camshaft and methods of installing a camshaft, the camshaft having at least one detachable bearing journal to enable varied camshaft designs to be assembled into an engine.