Cylinder block for internal combustion engine

Claim 1

A cylinder block for a V-type engine comprising a cylinder portion and a skirt portion connected to a lower side of said cylinder portion, said cylinder portion comprising a pair of cylinder banks, each cylinder bank having a plurality of cylinders arranged in a row and a pair of opposed side walls extending in a direction along the rows of the cylinders with the cylinders each having a contour and being disposed between said side walls said skirt portion defining a crank chamber and having a pair of opposed side walls extending in a direction along the rows of the cylinders, and each integrally formed of a plurality of sinuous outwardly bulging bight portions, characterized in that the bight portions in one side wall of said skirt portion have a phase which is displaced from that in the other side wall of said skirt portion wherein the outwardly bulging light portions of each of the side wall of said skirt portion is formed in alignment corresponding to integrally formed outwardly bulging bight portions of the row of the cylinders of the respective cylinder banks which follow the contour of each of the cylinders.