Cylinder liner and method for manufacturing a cylinder liner

Patent metadata

Field	Value
Publication number	US-12553401-B2
Application number	US-202218288637-A
Country	US
Kind code	B2
Filing date	Apr 26, 2022
Priority date	Apr 30, 2021
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

The present invention refers to a cylinder liner for an internal combustion engine, comprising a flange having a seat-engaging surface which is configured for bearing onto a flange seat of an engine block, and wherein the seat-engaging surface has a sloped portion which extends along at least a half of a radial length of the seat-engaging surface and which is inclined relative to a radial plane being normal to a longitudinal axis of the cylinder liner.

First claim

The invention claimed is:

1 . A cylinder liner for an internal combustion engine, comprising a flange having a seat-engaging surface, and wherein the seat-engaging surface has a sloped portion which extends along at least a half of a radial length of the seat-engaging surface and which is inclined, in a dissembled state, relative to a radial plane being normal to a longitudinal axis of the cylinder liner;
the cylinder liner is designed such that, in a mounted state in which the cylinder liner is installed in the engine, the flange is bent or shifted such that the flange is parallel to a radial plane and perpendicular to the longitudinal axis of the cylinder liner.

2 . The cylinder liner according to claim 1 , wherein the sloped portion is inclined about 10 to 50 angular minutes (0.17° to) 0.83° relative to the radial plane.

3 . The cylinder liner according to claim 1 , wherein the flange is provided at a first end of the cylinder liner including a front surface and the sloped portion of the seat-engaging surface is inclined towards the front surface of the cylinder liner.

4 . The cylinder liner according to claim 1 , which further comprises a hollow body formed by a wall extending circumferentially around the longitudinal axis, wherein the sloped portion of the seat-engaging surface is connected to an outer surface of the wall via or at a fillet.

5 . The cylinder liner according to claim 4 , wherein the fillet connects with an undercut portion provided in the outer surface of the wall.

6 . The cylinder liner according to claim 4 , wherein the sloped portion of the seat-engaging surface extends from a radially outer end section of the seat-engaging surface towards or to the fillet.

7 . The cylinder liner according to claim 1 , wherein the flange comprises the front surface being arranged opposed to the seat-engaging surface, and wherein the flange is designed such that the front surface of the flange, at least partly, extends parallel to the sloped portion of the seat-engaging surface or parallel to the radial plane.

8 . The cylinder liner according to claim 1 , wherein the sloped portion of the seat-engaging surface is manufactured by a subtractive manufacturing process.

9 . The method for manufacturing a cylinder liner according to claim 1 , comprising a step of machining the seat-engaging surface of the flange so as to form the sloped portion of the seat-engaging surface.

10 . The method according to claim 9 , further comprising the steps of:
providing a half-finished cylinder liner; applying a compressive force onto a first end of the half-finished cylinder liner, wherein the step of machining the seat-engaging surface of the flange is carried out while the step of applying the compressive force is performed.

11 . The method according to claim 10 , wherein the step of applying the compressive force is performed such that the seat-engaging surface of the half-finished cylinder liner has a part which extends along at least a half of the radial length of the seat-engaging surface and which is inclined relative to the radial plane in an opposed direction compared to the sloped portion of the cylinder liner.

12 . The cylinder liner according to claim 1 , wherein the sloped portion of the seat-engaging surface extends along at least 80% or 90% of the radial length of the seat-engaging surface.

Assignees

• Caterpillar Energy Solutions Gmbh

Inventors

• Guisasola Inigo
• Berger Olaf

Classifications

• F02F2200/00

  Manufacturing · CPC title

• F02F2001/008

  Stress problems, especially related to thermal stress · CPC title

• B23B1/00

  Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods · CPC title

• F02F1/004 Primary

  Cylinder liners (F02F1/08, F02F1/16 take precedence) · CPC title