Arrangement for an internal combustion engine and method for cooling such an arrangement

Patent metadata

Field	Value
Publication number	US-11859575-B2
Application number	US-202017909326-A
Country	US
Kind code	B2
Filing date	Mar 3, 2020
Priority date	Mar 3, 2020
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

An arrangement for an internal combustion engine includes a crank case, a cylinder liner disposed in a cylinder of the crank case and including a flange, and a cylinder head disposed on an end of the cylinder delimiting a combustion zone inside the cylinder liner, wherein the flange of the cylinder liner is braced between the cylinder head and the crank case, wherein a flange cooling cavity is provided, which is delimited by a circumferential surface of the flange of the cylinder liner and the cylinder head.

First claim

The invention claimed is:

1. A system, comprising
a crank case having a cylinder;
a cylinder liner disposed in the cylinder of the crank case, wherein the cylinder liner comprises a flange, and
a cylinder head disposed on an end of the cylinder delimiting a combustion zone inside the cylinder liner,
wherein the flange of the cylinder liner is braced between the cylinder head and the crank case, wherein a flange cooling cavity is disposed directly between and in fluid communication with a first outer circumferential surface of the flange of the cylinder liner and the cylinder head, and the flange cooling cavity extends over a radial distance between the first outer circumferential surface and an inner circumferential surface over a circumferential distance about a longitudinal axis of the cylinder liner.

2. The system of claim 1 , wherein the flange of the cylinder liner is arranged on an end of the cylinder liner closest to the cylinder head, the flange cooling cavity extends along the first outer circumferential surface of the flange over a first distance along the longitudinal axis, the flange cooling cavity extends along a second outer circumferential surface of the cylinder head over a second distance along the longitudinal axis, and the end of the cylinder liner is disposed between the first and second distances.

3. The system of claim 2 , wherein the flange cooling cavity is delimited by a head gasket sealing an interface between the cylinder head and the end of the cylinder liner, wherein the head gasket is disposed between the first and second distances.

4. The system of claim 1 , wherein the flange cooling cavity is delimited peripherally by the inner circumferential surface on the crank case and/or a further component part, separate from the crank case.

5. The system of claim 1 , wherein the flange cooling cavity covers at least 20% of the height of the outer circumferential surface of the flange of the cylinder liner and the flange cooling cavity covers at least 75% of a circumference of the outer circumferential surface of the flange of the cylinder liner.

6. The system of claim 1 , wherein the flange cooling cavity comprises an annulus disposed completely about a circumference of the outer circumferential surface of the flange of the cylinder liner.

7. The system of claim 1 , wherein the flange cooling cavity has a substantially polygonal cross-section disposed between the outer circumferential surface of the flange and the inner circumferential surface.

8. The system of claim 1 , comprising:
a liner cooling cavity disposed between the crank case and a body of the cylinder liner, wherein the liner cooling cavity is disposed further away from the cylinder head than the flange, and
a head cooling cavity disposed in the cylinder head,
wherein the flange cooling cavity is in fluid communication with the liner cooling cavity through a first set of cooling medium passages, and the flange cooling cavity is in fluid communication with the head cooling cavity through a second set of cooling medium passages.

9. The system of claim 8 , wherein the first set of cooling medium passages pass through the crank case, and the second set of cooling medium passages pass through the cylinder head.

10. The system of claim 8 , wherein the first and second sets of cooling medium passages are external to the cylinder liner.

11. The system of claim 8 , comprising first openings interfacing the flange cooling cavity and the first set of cooling medium passages and second openings interfacing the flange cooling cavity and the second set of cooling medium passages, wherein, viewed along a longitudinal axis of the cylinder liner, the first openings and the second openings have different angular positions relative to the longitudinal axis.

12. The system of claim 8 , wherein the liner cooling cavity is delimited by a bottom wall of the flange of the cylinder liner, the bottom wall faces away from the cylinder head, and the flange cooling cavity is axially spaced apart from the bottom wall of the flange of the cylinder liner relative to the longitudinal axis.

13. The system of claim 1 , comprising:
a head cooling cavity delimited by the cylinder head,
the flange cooling cavity is in fluid communication with the head cooling cavity through a set of cooling medium passages, and
the cylinder head includes intake and exhaust ports, wherein more of the set of cooling medium passages are near the exhaust ports than near the intake ports.

14. The system of claim 1 , comprising an internal combustion engine comprising the crank case, the cylinder liner, and the cylinder head.

15. A method, comprising:
flowing a cooling medium through a flange cooling cavity disposed directly between and in fluid communication with a first outer circumferential surface of a flange of a cylinder liner and a cylinder head, wherein the cylinder liner is disposed in a cylinder of a crank case, the cylinder head is disposed on an end of the cylinder delimiting a combustion zone inside the cylinder liner, the flange of the cylinder liner is braced between the cylinder head and the crank case, and the flange cooling cavity extends over a radial distance between the first outer circumferential surface and an inner circumferential surface over a circumferential distance about a longitudinal axis of the cylinder liner.

16. The method of claim 15 , comprising directing the cooling medium to flow at least partially in a circumferential direction around the flange of the cylinder liner.

17. The method of claim 15 , wherein the flange cooling cavity covers at least 20% of a height of the outer circumferential surface of the flange of the cylinder liner, and the flange cooling cavity covers at least 75% of a circumference of the outer circumferential surface of the flange of the cylinder liner.

18. A system, comprising:
a body portion of an internal combustion engine, comprising:
a cylinder in the body portion;
a flange recess in the body portion, wherein the cylinder is configured to receive a cylinder liner having a flange disposed in the flange recess; and
a flange cooling cavity disposed at least partially along the flange recess, wherein the flange cooling cavity extends over a radial distance directly between a first outer circumferential surface of the flange and an inner circumferential surface of the body portion over a circumferential distance about a longitudinal axis of the cylinder liner.

19. The system of claim 18 , wherein the body portion comprises a liner cooling cavity configured to extend at least partially along the cylinder liner, a head cooling cavity configured to extend at least partially above the cylinder, a first cooling medium passage extending between the flange cooling cavity and the liner cooling cavity external from the cylinder liner, and a second cooling medium passage extending between the flange cooling cavity and the head cooling cavity external from the cylinder liner.

20. The system of claim 19 , comprising the internal combustion engine having the cylinder liner disposed in the cylinder.

Assignees

• Innio Jenbacher Gmbh & Co Og

Inventors

• Becker Florian

Classifications

• F02F1/16 Primary

  Cylinder liners of wet type · CPC title

• F02F1/045

  Attachment of cylinders to crankcase · CPC title