US 11,815,045 B2
Cylinder liner for an internal combustion engine
Stefan Gaiselmann, Stuttgart (DE); Bartek Lemm, Altbach (DE); Ricardo Daltio Riceto, Stuttgart (DE); and Thomas Stibleichinger, Tumeltsham (AT)
Assigned to Mahle International GmbH
Filed by Mahle International GmbH, Stuttgart (DE)
Filed on Jun. 13, 2022, as Appl. No. 17/838,672.
Claims priority of application No. 102021205978.3 (DE), filed on Jun. 11, 2021.
Prior Publication US 2022/0397077 A1, Dec. 15, 2022
Int. Cl. F02F 1/20 (2006.01); F02F 1/00 (2006.01)
CPC F02F 1/004 (2013.01) 20 Claims
OG exemplary drawing
 
1. A cylinder liner for an internal combustion engine, comprising:
a hollow-cylindrical liner body extending along an axial direction, the liner body having an inner circumferential surface including, along the axial direction, a first axial portion and a second axial portion;
the first axial portion formed one of cylindrically and conically, and opening at a first opening angle towards the second axial portion;
the second axial portion opening at a second opening angle away from the first axial portion;
wherein the second opening angle is greater than the first opening angle;
wherein a first surface roughness of the inner circumferential surface in the first axial portion is greater than a second surface roughness in the second axial portion;
wherein a plateau aspect of the inner circumferential surface in the second axial portion, which is defined as R3p=Rvk/(Rpk+Rk), is 0.2 to 1.6; and
wherein a texture height of the inner circumferential surface in the second axial portion, which is defined as R3k=Rpk+Rk+Rvk, is 0.4 μm or less.