The present invention relates to an actuation device for a compressor inlet adjustment mechanism. The actuation device comprises a housing part and a lever assembly. The lever assembly comprises a bearing section, an input section and an output section. The output section is configured to be coupled to an adjustment ring of the adjustment mechanism on a first side of the housing part. The input section can be coupled to an actuator rod on a second side of the housing part. The lever assembly is rotatably mounted in the housing part via the bearing section on the compressor inlet side here.

The invention relates to a rolled plain bearing bush, having a butt joint, an axial direction, a radial direction, and a peripheral direction, comprising a first semicylindrical segment and a second semicylindrical segment, which are arranged diametrically opposite each other, and a third segment and a fourth segment, which each deviate from the semicylindrical shape of the first and second segments and are arranged between the first and second segments in the peripheral direction and diametrically opposite each other, wherein the first and second segments each have a semicylindrical inner peripheral surface and outer peripheral surface, and wherein the third and fourth segments each have a flat inner peripheral surface, which flat inner peripheral surfaces extend parallel to each other, wherein a smallest radial distance between the inner peripheral surfaces of the third and fourth segments is less than a bush inside diameter, which corresponds to a radial distance between the inner peripheral surfaces of the first and second segments, which is constant along the extent of the inner peripheral surfaces of the first and second segments.

The invention relates to a rolled plain bearing bush, having a butt joint, an axial direction, a radial direction, and a peripheral direction, comprising a first semicylindrical segment and a second semicylindrical segment, which are arranged diametrically opposite each other, and a third segment and a fourth segment, which each deviate from the semicylindrical shape of the first and second segments and are arranged between the first and second segments in the peripheral direction and diametrically opposite each other, wherein the first and second segments each have a semicylindrical inner peripheral surface and outer peripheral surface, and wherein the third and fourth segments each have a flat inner peripheral surface, which flat inner peripheral surfaces extend parallel to each other, wherein a smallest radial distance between the inner peripheral surfaces of the third and fourth segments is less than a bush inside diameter, which corresponds to a radial distance between the inner peripheral surfaces of the first and second segments, which is constant along the extent of the inner peripheral surfaces of the first and second segments.

A variable compression ratio device may include a connecting rod having a large end portion link-connected to a crankshaft and a small end portion link-connected to a piston by a piston pin, an eccentric cam rotatably installed at the small end portion of the connecting rod and at which the piston pin eccentrically passes through a rotation center, and an low-pressure outer plate and an high-pressure outer plate engaged with both side surfaces of the eccentric cam, formed to partially protrude outward, and selectively engaged with the connecting rod according to a compression ratio. In addition, the low-pressure outer plate and the high-pressure outer plate are selectively engaged with the connecting rod by a controller according to a supply direction of a hydraulic pressure.

A switching valve module is provided in a connecting rod of a reciprocating internal combustion engine in order to control a distributing device for changing the compression ratio of a cylinder unit of the reciprocating internal combustion engine. In order to provide an arrangement of a mechanically actuated switching valve module which can be advantageously integrated into the connecting rod, the switching valve module should be arranged in a module housing of which at least partly has an outer cylindrical contour and a transverse through-bore for receiving a control slide valve, and the cylindrical section of the switching valve module can be inserted into a receiving bore in the connecting rod that is transverse to a longitudinal central axis of a connecting rod bearing eye.

An eccentric member for a system for varying compression ratio of an internal combustion engine comprises two circumferential bearing portions for bearing respective big ends of connecting rods of a V-type internal combustion engine. The bearing portions are eccentric with respect to an inner surface of the eccentric member and located at a distance from each other in axial direction of the eccentric member. The eccentric member also comprises two external gears between which the bearing portions are located. The eccentric member is made of two half-sleeves which are fixed to each other at least between the bearing portions.

An eccentric member for a system for varying compression ratio of an internal combustion engine comprises two circumferential bearing portions for bearing respective big ends of connecting rods of a V-type internal combustion engine. The bearing portions are eccentric with respect to an inner surface of the eccentric member and located at a distance from each other in axial direction of the eccentric member. The eccentric member also comprises two external gears between which the bearing portions are located. The eccentric member is made of two half-sleeves which are fixed to each other at least between the bearing portions.

A method is provided for producing an assembly of an eccentric rod (15, 16) and a piston (20, 21) of a connecting rod of an internal combustion engine having an adjustable compression ratio. The method includes providing an eccentric rod (15, 16) having a first end (36, 37) for attachment to an eccentric lever of an eccentric adjusting device of the connecting rod and a second end (38, 39) for attachment to a piston (20, 21) that can be guided in a hydraulic chamber of the connecting rod. The method then includes arranging the second end (38, 39) of the eccentric rod (15, 16) in the piston (20, 21); introducing an injection-molding tool (47) into the piston (20, 21); and injection-molding a circumferentially closed retaining ring (43) between the piston (20, 21), the second end (38, 39) of the eccentric rod (15, 16) and the injection-molding tool (47).

A method is provided for producing an assembly of an eccentric rod (15, 16) and a piston (20, 21) of a connecting rod of an internal combustion engine having an adjustable compression ratio. The method includes providing an eccentric rod (15, 16) having a first end (36, 37) for attachment to an eccentric lever of an eccentric adjusting device of the connecting rod and a second end (38, 39) for attachment to a piston (20, 21) that can be guided in a hydraulic chamber of the connecting rod. The method then includes arranging the second end (38, 39) of the eccentric rod (15, 16) in the piston (20, 21); introducing an injection-molding tool (47) into the piston (20, 21); and injection-molding a circumferentially closed retaining ring (43) between the piston (20, 21), the second end (38, 39) of the eccentric rod (15, 16) and the injection-molding tool (47).

An apparatus for adjusting the length of connecting rods in an internal combustion engine, having a shift guide plate arrangement which has shift guide plates which can be adjusted in one spatial direction for actuating connecting rod actuating devices which are integrated into the connecting rods for the purpose of changing the length of the respective connecting rod. The shift guide plates are connected fixedly to a carrier frame. The carrier frame is mounted in a stationary oil scraper arrangement such that it can be displaced in the spatial direction. The oil scraper arrangement has oil scrapers for stripping oil from the connecting rods.