OPTIMIZED FIRE RING

The present invention pertains to a cylinder liner for a cylinder of a combustion engine as well as a combustion engine comprising at least one cylinder with a corresponding cylinder liner, in particular to reduce pressure differences between a combustion chamber and an upper part of a piston and/or to improve stiffness and fatigue strength of the cylinder liner. Accordingly, a cylinder liner (10) for a cylinder of a combustion engine is suggested, which comprises a longitudinally extending wall, wherein an inner diameter of the wall defines a bore (12) configured for receiving a piston and wherein the wall comprises a recess (14) facing the bore (12) and accommodating a ring-shaped element (16) extending into the bore (12) and beyond the wall in a radially inward direction. An inner diameter (20) of an upper wall portion (18) extending from the recess (14) to a combustion region end portion of the cylinder liner (10) is larger than an inner diameter (24) of a bottom wall portion (22) extending from the recess (14) to an opposing end portion of the cylinder liner (10).