Abstract: The invention relates to a method for producing a cylinder jacket, comprising the following steps: producing a cylindrical starting product from a steel material having a carbon content of not more than 0.8% by weight and a ferritic or ferritic/pearlitic structure; enriching, by carburization, the surface layer of the inner peripheral surface of the cylindrical starting product with carbon in the form of carbides that are deposited on the grain boundaries; slowly cooling the cylindrical starting product in such a manner that a pearlitic structure having a carbide network is formed in the surface layer; finishing the cylindrical starting product to give a cylinder jacket. The invention also relates to a cylinder jacket produced by said method.

Abstract: The invention relates to a cylinder crankcase (1) for an internal combustion engine, into which crankcase a one-piece cylinder jacket system (9) is diecast, the system comprising at least two cylinder jackets (5, 6, 7) that are arranged in a row and that are interconnected via webs (2, 3, 4). The aim of the invention is to provide a cylinder crankcase which can be produced at low cost and which comprises a cylinder jacket system that can be subjected to high thermal and mechanical stresses. According to the invention, a lateral face of the cylinder jacket system (9) has a rough structure and is surrounded by a diecast outer casing (26). Respective coolant passages (14, 15, 16) having openings (31, 32) for supplying and discharging the coolant are formed into the webs (2, 3, 4), at least one opening (32) extending through the outer casing (26) into the recess (25) for the water cooling jacket.

Abstract: The invention relates to a method for producing a cylinder jacket, comprising the following steps: producing a cylindrical starting product from a steel material having a carbon content of not more than 0.8% by weight and a ferritic or ferritic/pearlitic structure; enriching, by carburization, the surface layer of the inner peripheral surface of the cylindrical starting product with carbon in the form of carbides that are deposited on the grain boundaries; slowly cooling the cylindrical starting product in such a manner that a pearlitic structure having a carbide network is formed in the surface layer; finishing the cylindrical starting product to give a cylinder jacket. The invention also relates to a cylinder jacket produced by said method.

Abstract: A cylinder sleeve for an internal combustion engine is provided with a flat zone that extends along the entire axial length thereof. The cylinder sleeve is embodied as a rough cast sleeve whose outer surface comprises a rough zone that extends along the entire axial length thereof and consists of a plurality of elevations with undercuts in order to ensure that a sufficient amount of combustion heat generated during operation of the engine is discharged.

Abstract: Disclosed is a cylinder sleeve for an internal combustion engine. The outer surface of said cylinder sleeve is provided with a flat zone (61) that extends along the entire axial length thereof. The inventive cylinder sleeve is embodied as a rough cast sleeve whose outer surface comprises a rough zone that extends along the entire axial length thereof and consists of a plurality of elevations with undercuts in order to ensure that a sufficient amount of combustion heat generated during operation of the engine is discharged.