Patent ID: 6167847
Filing Date: 2001-01-02
Classification: F02F

Abstract:
A cylinder liner for a liquid-cooled internal combustion engine, with a cylinder liner collar which is adjacent to a cylinder head sealing plane and into which is formed at least one annular cooling duct, wherein a cross section of the cooling duct is formed, within the cylinder liner collar, by a closed profile line having at least an inner, an outer and an upper section, and the cross section of the cooling duct is provided with a substantially oblong shape whose height as measured substantially in the direction of the cylinder liner axis is larger than its maximum width as measured substantially in a radial direction of the cylinder liner, with an arrangement and a cross-sectional shape of the cooling duct being provided in such a way that the cooling of the cylinder liner collar is higher in an upper zone which is closest to the cylinder head sealing plane than in a lower zone of the cooling duct which is disposed remotest from the cylinder head sealing plane, and wherein the liner wall thickness as measured between the inner section of the profile line and an inner jacket surface of the cylinder liner increases from a minimum liner wall thickness in the upper zone of the cooling duct towards the lower zone.