A method for varying a compression ratio of an operating applied-ignition internal combustion engine having at least two cylinders and having a crank mechanism (1) comprising a crankshaft (2) which is mounted in a crankcase and which rotates at a crankshaft rotational speed .sub.crankshaft, is described. The method includes increasing an expansion phase of a cylinder cycle via rotation of the eccentric bushing (4).

A method and an apparatus includes a static engine structure, at least one shaft that rotates relative to the static engine structure, and a bearing assembly that supports the shaft. The bearing assembly includes at least one first bearing hard mounted directly between the shaft and the static engine structure and at least one second bearing mounted between the shaft and the static engine structure. The at least one second bearing includes a damper. Also included is at least one third bearing that is mounted between the shaft and the static engine structure, wherein the at least one third bearing includes a resilient member.

A connecting rod for an internal combustion engine with variable compression, the connecting rod including an eccentrical element adjustment arrangement configured to adjust an effective connecting rod length, wherein the eccentrical element adjustment arrangement includes an eccentrical element that cooperates with an eccentrical element lever and supports rods that engage the eccentrical element lever, and wherein the eccentrical element lever is integrally configured in one piece as a stamped and bent component or fabricated by a massive cold forming method.

A variable compression ratio mechanism includes a variable length connecting rod. The variable length connecting rod includes a connecting rod body, an eccentric member, and an eccentric member drive mechanism. The eccentric member includes a piston pin receiving opening, is rotatably attached to the body, and changes in effective length when it is rotated. The eccentric member drive mechanism includes a projecting pin protruding from the body and rotating the eccentric member when a position of the projecting pin relative to the body changes. A guide member of the variable compression ratio mechanism guides the projecting pin during operation.

A variable compression ratio mechanism includes a variable length connecting rod. The variable length connecting rod includes a connecting rod body, an eccentric member, and an eccentric member drive mechanism. The eccentric member includes a piston pin receiving opening, is rotatably attached to the body, and changes in effective length when it is rotated. The eccentric member drive mechanism includes a projecting pin protruding from the body and rotating the eccentric member when a position of the projecting pin relative to the body changes. A guide member of the variable compression ratio mechanism guides the projecting pin during operation.

A supporting arrangement for an eccentric member (8) of an adjusting arrangement (6) of a connecting rod (2) of a reciprocating piston internal combustion engine having at least one piston rod (18) that is guided displaceably by a piston (20) and a seal member (24) is connected to the supporting piston (20) in a supporting cylinder (12, 14) which is provided in the connecting rod (2) and has a longitudinal axis (16). The supporting piston (20) enclosing at least one cylinder chamber (22) with the supporting cylinder (12, 14). A side (28) of the supporting piston (20) that is directed toward the cylinder chamber (22) has a brake piston (30) that can be moved in the longitudinal axis (16). The brake piston (30) is mounted on the supporting piston (20) and can be prestressed by a spring (32).

Reciprocating-piston machine (10), in particular a combustion machine, with a variable compression ratio, having an adjustment device for adjusting the compression ratio, having a sensor device for detecting the compression ratio, and having a controller which is designed to repeatedly activate the adjustment device if a deviation and a detected compression ratio and a setpoint compression ratio exists.

A connection rod coupling assembly includes a settable shape mounting second component having a lateral, primary axis and a bearing assembly including a bearing assembly body. The bearing assembly body includes a substantially cylindrical outer surface and a center axis. The bearing assembly body is coupled to the settable shape mounting second component in a non-aligned configuration. That is, the bearing assembly body center axis is offset from the settable shape mounting second component primary axis. Thus, the position of the bearing assembly body center axis is adjustable by repositioning the settable shape mounting second component relative to a settable shape mounting first component on a swing lever. The adjustment of the bearing assembly body, in turn, adjusts the range of the ram assembly and the ram assembly body.

A supercharger for a motor vehicle engine may include a bearing device for mounting a shaft in a hub of a bearing housing. The bearing device may be configured to mount the shaft between a turbine wheel and a compressor wheel of the shaft via a bearing bush that may be floatingly mounted to the shaft within the hub in a closely delimited manner relative to the hub and the shaft. The bearing bush may be securely positioned by a pin that engages into the bearing bush radially from the hub. The pin may include a first part rotatably mounted in the bearing housing and a second part engaging in a recess of the bearing bush. An axis of the first part and an axis of the second part may run parallel to one another. The bearing bush and the pin may be connected via a ball joint connection.

A supercharger for a motor vehicle engine may include a bearing device for mounting a shaft in a hub of a bearing housing. The bearing device may be configured to mount the shaft between a turbine wheel and a compressor wheel of the shaft via a bearing bush that may be floatingly mounted to the shaft within the hub in a closely delimited manner relative to the hub and the shaft. The bearing bush may be securely positioned by a pin that engages into the bearing bush radially from the hub. The pin may include a first part rotatably mounted in the bearing housing and a second part engaging in a recess of the bearing bush. An axis of the first part and an axis of the second part may run parallel to one another. The bearing bush and the pin may be connected via a ball joint connection.