Abstract: A cooling structure for an internal combustion engine piston is provided. The piston includes an oil cooling channel integrated in the piston. The oil cooling channel has a bottom surface facing towards a top surface of the piston and a top surface facing away from the top surface of the piston. The oil cooling channel is provided with an oil inlet and an oil outlet which are laterally separated from each other. The bottom surface and/or the top surface of the oil cooling channel is slanted relative to a central axis of a wrist pin opening provided in said piston.

Abstract: A cooling structure for an internal combustion engine piston is provided. The piston includes an oil cooling channel integrated in the piston. The oil cooling channel has a bottom surface facing towards a top surface of the piston and a top surface facing away from the top surface of the piston. The oil cooling channel is provided with an oil inlet and an oil outlet which are laterally separated from each other. The bottom surface and/or the top surface of the oil cooling channel is slanted relative to a central axis of a wrist pin opening provided in said piston.

Abstract: Method and arrangement for providing a lubrication system for an internal combustion engine with at least one piston reciprocating in an engine cylinder. The lubrication system includes an oil pump (11) with adjustable feed pressure which is controlled via a pressure-sensing means (18) which is acted on by the working pressure of the oil. The pressure-sensing means (18) is acted on via a pressure outlet (21) which is hydraulically connected to one of the bearings of the internal combustion engine which are lubricated by the lubrication system.

Abstract: Apparatus for reducing backlash in a gear wheel that includes at least two interacting gear rims that rotate in relation to one another. An adjusting mechanism is located between the gear rims for adjusting the relative angle of rotation of the gear rims about a common axis of rotation. Each adjusting mechanism includes an hydraulic cylinder connected to a pressure medium source and which is arranged to act between the two gear rims in such a manner that a force arises that tends to displace one gear rim in relation to the other about the axis of rotation. Each of the hydraulic cylinders extends at an angle to a disk plane and is supported on a part-spherical foot portion in a bowl-shaped seat in one gear rim and a corresponding part-spherical head portion in a bowl-shaped seat in the other gear rim.

Abstract: Method and arrangement for providing a lubrication system for an internal combustion engine with at least one piston reciprocating in an engine cylinder. The lubrication system includes an oil pump (11) with adjustable feed pressure which is controlled via a pressure-sensing means (18) which is acted on by the working pressure of the oil. The pressure-sensing means (18) is acted on via a pressure outlet (21) which is hydraulically connected to one of the bearings of the internal combustion engine which are lubricated by the lubrication system.

Abstract: Apparatus and method for reducing backlash in a gear wheel (10) including at least two interacting gear rims (11, 12) that can rotate in relation to one another. At least one adjusting means (15) is located between the gear rims for adjusting the relative angle of rotation of the gear rims about a common axis of rotation. The adjusting means (15) includes an hydraulic cylinder which is connected to a pressure medium source and is arranged so as to act between two gear rims (11, 12). In this connection, a force arises, which tends to displace one gear rim in relation to the other about the axis of rotation.