Patent Number: 6,167,847

Title: Cylinder liner for a liquid-cooled internal combustion engine

Abstract: A cylinder liner for a liquid-cooled internal combustion engine, includes a cylinder liner collar which is adjacent to a cylinder head sealing plane and into which is formed at least one circular cooling duct. In order to ensure adherence to a temperature window between a maximum temperature and a minimum temperature during operation, the cross section of the cooling duct is formed by a closed profile line within the cylinder liner collar, and the cross section of the cooling duct has 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 the radial direction of the cylinder liner, with the arrangement and/or the 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.

Inventors: Ergezen; Ugur (Lieboch, AT), Tanska; Tuomas (Graz, AT), Melde-Tuczai; Helmut (Graz, AT)

Assignee: AVL List GmbH

International Classification: F02F 1/16 (20060101); F02F 1/02 (20060101); F02F 001/14 ()

Expiration Date: 01/02/2018