A steel piston with a bushing applied to pin bore surfaces by laser cladding or laser additive manufacturing is provided. The bushing is formed of metal, such as bronze, and metallurgically bonded to the steel of the piston. Thus, the bushing cannot fail by rotating relative to pin bore surfaces. The bushing has a porosity ranging from 0.05% to 5%, based on the total volume of the bushing, and a thickness ranging from 0.07 mm to 6 mm. Since the metal is applied directly to the steel by laser cladding or laser additive manufacturing, the overall size of the piston is reduced, compared to typical pistons with a separate steel backed bushing, and the possibility of bushing rotation is avoided. The bushing also provides scuffing resistance and increased unit load capacity of the pin bore.

A steel piston with a bushing applied to pin bore surfaces by laser cladding or laser additive manufacturing is provided. The bushing is formed of metal, such as bronze, and metallurgically bonded to the steel of the piston. Thus, the bushing cannot fail by rotating relative to pin bore surfaces. The bushing has a porosity ranging from 0.05% to 5%, based on the total volume of the bushing, and a thickness ranging from 0.07 mm to 6 mm. Since the metal is applied directly to the steel by laser cladding or laser additive manufacturing, the overall size of the piston is reduced, compared to typical pistons with a separate steel backed bushing, and the possibility of bushing rotation is avoided. The bushing also provides scuffing resistance and increased unit load capacity of the pin bore.

A rocking journal bearing is provided in a piston coupling mechanism. The bearing includes a sleeve and a wristpin constructed with two sets of eccentrically-disposed bearing surfaces which alternate in accepting a compressive load during an operational cycle of the bearing. The sleeve includes a network of grooves to transport oil to the bearing surfaces. Lubricating oil flow through the bearing is minimized by limiting provision of pressurized oil from the wristpin to the network of grooves to portions of the cycle when one or the other of the sets of bearing surfaces receives the compressive load.

A rocking journal bearing is provided in a piston coupling mechanism. The bearing includes a sleeve and a wristpin constructed with two sets of eccentrically-disposed bearing surfaces which alternate in accepting a compressive load during an operational cycle of the bearing. The sleeve includes a network of grooves to transport oil to the bearing surfaces. Lubricating oil flow through the bearing is minimized by limiting provision of pressurized oil from the wristpin to the network of grooves to portions of the cycle when one or the other of the sets of bearing surfaces receives the compressive load.

A connecting rod for a multiple connecting rod axle of a motor vehicle, especially a lower wishbone for a multiple connecting rod rear axle, includes a substantially Y-shaped basic framework with a first arm, the free end region of which has a first seat for linking the connecting rod to an auxiliary frame or a vehicle body, with a second arm, the free end region of which has a second seat for linking the connecting rod to the auxiliary frame rod or the vehicle body, and with a third arm, the free end region of which has a third seat for linking the connecting rod to a wheel carrier. The connecting rod is manufactured in one piece with the seats.

In order to reduce bending vibration of a connecting rod, a dynamic absorber (50) configured to reduce the bending vibration of the connecting rod (10) is provided on a piston (1).

In order to reduce bending vibration of a connecting rod, a dynamic absorber (50) configured to reduce the bending vibration of the connecting rod (10) is provided on a piston (1).

A pivoting bearing is provided for two connecting rods in a reciprocating piston of an internal combustion engine having two crankshafts which are driven via the reciprocating piston and the connecting rods. The pivoting bearing is received by piston bores of the piston and has gudgeon pin bores for mounting gudgeon pins for gudgeon pin eyes of the connecting rods. The pivoting bearing has radial bearing regions which are provided with the pin bores, are arranged on both sides of a center longitudinal axis of the reciprocating pistons, and delimit the gudgeon pin eyes in a manner which forms an intermediate space. To optimize the pivoting bearing, the bearing regions of the pivoting bearing are configured as cylinder bodies with a cup-like cross section, of which each cylinder body has a base wall and a bearing ring shell. The base walls of the two cylinder bodies extend at a spacing from one another, and the bearing ring shells which surround the base walls are guided away from the base walls in opposite directions. A plurality of connecting stubs run between the base walls in such a way that two connecting stubs are arranged on a side of the pivoting bearing, which side faces a piston crown, and extend at a relatively small spacing from ring sections of the gudgeon pin eyes, and in such a way that the connecting stubs and the ring sections have lubricating structures for lubricating connecting rod bearings of the connecting rods.

A multi-joint crank drive of an internal combustion engine includes at least one coupling member supported on a crankpin of a crankshaft for rotation about a coupling member rotation axis; and at least one articulated connecting rod supported on a crankpin of an eccentric shaft for rotation about an eccentric rotation axis, wherein the at least one coupling member is connected with a piston connecting rod of a piston of the internal combustion engine for pivoting about a piston connecting rod rotation axis, and with the at least one articulated connecting rod for pivoting about an articulated connecting rod rotation axis, and wherein a rotation axis of the eccentric shaft is situated above a plane which receives a rotation axis of the crankshaft and is perpendicular to at least one cylinder longitudinal center axis, and wherein, respectively in relation to a total travel of the piston.

A multi-joint crank drive of an internal combustion engine includes at least one coupling member supported on a crankpin of a crankshaft for rotation about a coupling member rotation axis; and at least one articulated connecting rod supported on a crankpin of an eccentric shaft for rotation about an eccentric rotation axis, wherein the at least one coupling member is connected with a piston connecting rod of a piston of the internal combustion engine for pivoting about a piston connecting rod rotation axis, and with the at least one articulated connecting rod for pivoting about an articulated connecting rod rotation axis, and wherein a rotation axis of the eccentric shaft is situated above a plane which receives a rotation axis of the crankshaft and is perpendicular to at least one cylinder longitudinal center axis, and wherein, respectively in relation to a total travel of the piston.