Abstract: A crankshaft comprising a plurality of main journal bearing surfaces (102), a plurality of connector rod bearing surfaces (104), and at least one oil feed passageway (110) internal to the crankshaft, each of the at least one oil feed passageways (110) communicating with an inlet (122) and a plurality of outlets (124) located within bearing surfaces (102, 104), and wherein the inlet (122) is located within a first main journal bearing surface, and at least one of the outlets (124) is located within a further main journal bearing surface, and an engine and a vehicle comprising such a crankshaft.

Abstract: A bearing arrangement comprising a bearing shell, and a bearing shell receiving element, wherein the bearing shell is cylindrical or part-cylindrical and has a circumferential oil supply slot, and the bearing shell receiving element has an oil supply channel located in correspondence with the oil supply slot.

Abstract: A bearing bush is described wherein the bush bore at the axial ends of the bush is provided with relieved portions extending at least a part of the distance around a circumference of the bush, the relieved portions being in the form of grooves in the bore surface.

Abstract: A bearing arrangement comprising a bearing shell, and a bearing shell receiving element, wherein the bearing shell is cylindrical or part-cylindrical and has a circumferential oil supply slot, and the bearing shell receiving element has an oil supply channel located in correspondence with the oil supply slot.

Abstract: A crankshaft comprising a plurality of main journal bearing surfaces (102), a plurality of connector rod bearing surfaces (104), and at least one oil feed passageway (110) internal to the crankshaft, each of the at least one oil feed passageways (110) communicating with an inlet (122) and a plurality of outlets (124) located within bearing surfaces (102, 104), and wherein the inlet (122) is located within a first main journal bearing surface, and at least one of the outlets (124) is located within a further main journal bearing surface, and an engine and a vehicle comprising such a crankshaft.

Abstract: A bearing bush is described wherein the bush bore at the axial ends of the bush is provided with relieved portions extending at least a part of the distance around a circumference of the bush, the relieved portions being in the form of grooves in the bore surface.

Abstract: A bearing is described, the bearing being of generally cylindrical form and being formed from a material comprising a strong backing material having thereon a lining of a bearing material, wherein the wall thickness has corrugations provided therein. The corrugations may extend in either the axial or transverse directions with respect to the bearing axis.

Abstract: Wrist pins for use in pistons are described. The wrist pin comprises an elongate, substantially hollow member having two spaced-apart convex surface portions of substantially cylindrical or oval curvature, the two convex portions being connected by two walls of different curvature. Because the connecting walls are more nearly in compression and bending loads are minimised a lighter wrist pin for a given application may be produced.