Patent ID: 7543556

Claim:
A cylinder crankcase comprising at least one cylinder liner ( 2 ) which is integrally cast in the cylinder crankcase ( 4 ) and runs in the cylinder crankcase ( 4 ) from a cylinder-head side ( 6 ) to an oil-chamber side ( 8 ), the cylinder liner ( 2 ) having an inner side ( 10 ), which forms a cylinder tube ( 12 ), and an outer side ( 14 ), around which the cylinder crankcase ( 4 ) is cast completely and directly, characterized in that the at least one cylinder liner ( 2 ), at least at one end ( 16 , 18 ), is longer on the inner side ( 10 ) in the axial direction than on the outer side ( 14 ), and in that the transition from the inner side ( 10 ) to the outer side ( 14 ) is effected in the form of encircling, concentric steps ( 22 ).