Patent ID: 6984070

Claim:
A crankshaft bearing comprising: a cylinder block which constitutes an internal combustion engine, and which includes plural first concave portions on a side opposite to a side where a cylinder head is provided; a cap including plural second concave portions each of which is formed at a position facing each of the first concave portions of the cylinder block such that one predetermined space is formed between each of the plural first concave portions and each of the plural second concave portions when the cap is fitted to the cylinder block; and plural bearing metals including plural upper metals and plural lower metals, each of the upper metals being fitted to each of the plural first concave portions, each of the lower metals being fitted to each of the plural second concave portions, and each of the upper metals and each of the lower metals being combined so as to form an opening portion having a cross section in a substantially circular shape, wherein axes passing through centers of the predetermined spaces are concentric before the cylinder head and a cylinder head gasket are mounted on the cylinder block, wherein an axis passing through a center of at least one of the predetermined spaces is deviated from a given reference straight line in a direction orthogonal to the reference straight line due to elastic bending deformation of the cylinder block when the cylinder head and the cylinder head gasket are mounted on the cylinder block, and wherein a thickness, in a direction parallel to the direction in which the axis is deviated, of one of the upper metal and the lower metal, which is positioned in the same direction as the direction in which the axis is deviated, is increased by an amount by which the axis is deviated from the reference straight line, and a thickness, in the direction parallel to the direction in which the axis is deviated, of one of the upper metal and the lower metal, which is positioned in a direction opposite to the direction in which the axis is deviated, is reduced by an amount by which the axis is deviated from the reference straight line.