Patent ID: 8695558
Filing Date: 2014-04-15
Classification: F02F

Abstract:
1. Cylinder block of an internal combustion engine having at least two cylinders, wherein each of the cylinders comprises a respective cylindrical wall lined with a respective cylinder sleeve, each of the cylinder sleeves having an inner wall for guiding a piston translationally and an outer wall intended to be supported by the cylindrical wall of the respective cylinder, the inner and outer walls of the respective cylinder sleeve being substantially co-cylindrical and delineating between them a top edge of the sleeve intended to accommodate at least part of a head gasket, wherein the outer wall of the cylinder sleeve comprises a top part that widens toward the top edge of the cylinder sleeve, wherein the outer wall of the cylinder sleeve is provided with striations, except on the widening top part of the outer wall, and wherein the widening of the top part of the cylinder sleeve is determined so that the top edges of at least two of the cylinder sleeves lining the cylindrical walls of two neighbouring cylinders among the at least two cylinders are arranged so that (i) there is a space between the top edges of the two neighbouring cylinders when the engine is cold, and (ii) there is no space between the top edges of the two neighbouring cylinder sleeves when the engine is warm, wherein the top part of each of the cylinder sleeves includes a straight annular peripheral rim adjoining the top edge of the respective cylinder sleeve.