Cylinder liner seal arrangement and method of providing the same

Patent metadata

Field	Value
Publication number	US-9464591-B2
Application number	US-201314100324-A
Country	US
Kind code	B2
Filing date	Dec 9, 2013
Priority date	Aug 3, 2011
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

A cylinder liner sealing arrangement for an internal combustion engine including a cylinder block having cylinder bores, a cylinder head, a cylinder liner within each cylinder bore and a circumferential cut-out formed in the upper and outer surfaces of the cylinder liner. A circular sealing ring is positioned in the circumferential cut-out with the sealing ring contacting at least the cylinder block and the cylinder liner to form a coolant seal therebetween. The sealing ring includes a seal enhancing configuration formed on at least an outer circumferential surface of the sealing ring with the seal enhancing configuration including at least one of an arcuate portion of a “D” ring seal or a plurality of circumferentially extending ribs. Replacing the cylinder liner seal includes removing the cylinder head while maintaining the position of the cylinder liner within the respective cylinder bore, removing an upper liner seal from within the circumferential cut-out while maintaining the position of the cylinder liner within the cylinder bore, positioning a replacement sealing ring in the circumferential cut-out while maintaining the position of the cylinder liner within the cylinder bore and replacing the cylinder head on the cylinder block of the engine.

First claim

What is claimed is:

1. A cylinder liner sealing arrangement for an internal combustion engine, comprising:
a cylinder block including a cylinder bore, the cylinder bore having an upper bore inner surface;
a cylinder head, the cylinder head being rigidly attached to the cylinder block;
a cylinder liner within the cylinder bore, the cylinder liner having a cylindrical upper outer surface and a planar top surface;
a circumferential cut-out having a first sidewall and a bottom wall extending from the first sidewall toward a joint between the upper bore inner surface and the cylindrical upper outer surface of the cylinder liner, wherein an upper portion of the first side wall is beveled; and
an upper liner seal positioned in the circumferential cut-out, the upper liner seal forming a coolant seal between the cylinder block and the cylinder liner.

2. The cylinder liner sealing arrangement of claim 1 , the upper liner seal including a metallic core, wherein the metallic core is encapsulated by and bonded to an elastomeric material.

3. The cylinder liner sealing arrangement of claim 1 , wherein the upper liner seal comprises an upper surface and a lower surface and a widest portion intermediate the upper surface and the lower surface, the widest portion configured to contact the cut-out below the beveled upper portion of the first sidewall to ensure the coolant seal is maintained even if the upper liner seal is pushed against an undersurface of the cylinder head by a fluid pressure.

4. The cylinder liner sealing arrangement of claim 1 , wherein the upper liner seal comprises an elastomeric material.

5. The cylinder liner sealing arrangement of claim 4 , wherein the elastomeric material is a high temperature coolant resistant elastomeric material.

6. The cylinder liner sealing arrangement of claim 4 , wherein the upper liner seal comprises at least one of tetrafluorethylene-propylene and peroxide cured fluorocarbon.

7. The cylinder liner sealing arrangement of claim 1 , the upper liner seal comprising a plurality of circumferentially extending ribs.

8. The cylinder liner sealing arrangement of claim 7 , wherein the plurality of circumferentially extending ribs are formed in at least an outer circumferential surface of the upper liner seal.

9. The cylinder liner sealing arrangement of claim 7 , wherein the plurality of circumferentially extending ribs are formed in an inner circumferential surface of the upper liner seal.

10. A method of replacing a cylinder liner sealing arrangement in an internal combustion engine, comprising:
removing a cylinder head from a cylinder block of the engine, the cylinder block having at least one cylinder bore;
removing a head gasket from the cylinder block of the engine;
maintaining a position of a cylinder liner within the at least one cylinder bore formed in the cylinder block, the cylinder liner having a cylindrical upper outer surface and a planar top;
removing an upper liner seal from within a circumferential cut-out while maintaining the position of the cylinder liner within the at least one cylinder bore;
positioning a replacement upper liner seal in the circumferential cut-out while maintaining the position of the cylinder liner within the at least one cylinder bore, the circumferential cut-out and the upper liner seal forming a coolant seal between the cylinder block and the cylinder liner; and
replacing the cylinder head on the cylinder block of the engine.

11. The method of replacing a cylinder liner sealing arrangement according to claim 10 ,
wherein the circumferential cut-out includes a first sidewall formed in the cylindrical upper outer surface of the cylinder liner and a radially extending bottom wall extending from the first side wall toward the cylinder block and an upper inner surface of the at least one bore forms a second sidewall; and
wherein the positioning of a replacement upper liner seal in the circumferential cut-out while maintaining the position of the cylinder liner within the at least one cylinder bore includes ensuring contact of the replacement upper liner seal with the first sidewall and the second sidewall.

12. The method of replacing a cylinder liner sealing arrangement according to claim 10 , wherein at least one of the upper liner seal and the replacement upper liner seal comprises a plurality of circumferentially extending ribs.

13. The method of replacing a cylinder liner sealing arrangement according to claim 12 , wherein the plurality of circumferentially extending ribs are formed in at least an outer circumferential surface of the at least one of the upper liner seal and the replacement upper liner seal, the plurality of circumferentially extending ribs being positioned in contact with the cylinder block.

14. The method of replacing a cylinder liner sealing arrangement according to claim 10 , wherein at least one of the upper liner seal and the replacement upper liner seal comprises a metallic core.

15. The method of replacing a cylinder liner sealing arrangement according to claim 10 , wherein the circumferential cut-out comprises a beveled upper edge, and wherein the upper liner seal comprises an upper surface and a lower surface and a widest portion intermediate the upper surface and the lower surface, and the widest portion is configured to contact the cylinder block and the cylinder liner to ensure the coolant seal is maintained even if the upper liner seal is pushed against an undersurface of the cylinder head by a fluid pressure.

16. The method of replacing a cylinder liner sealing arrangement according to claim 10 , wherein the circumferential cut-out has a first sidewall and a bottom wall extending from the first sidewall toward a joint between the cylinder bore and the cylindrical upper outer surface of the cylinder liner, and wherein an upper portion of the first side wall is beveled.

Assignees

• Cummins Ip Inc

Inventors

• Worthington Joseph
• Shaw Terry M
• Genter David
• Richardson Dan E
• Mcgiffen Ian
• Luehrmann Mark G
• Gunter Keith

Classifications

• Y10T29/49233

  Repairing, converting, servicing or salvaging · CPC title

• F02F1/004 Primary

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

• Y10T29/49272

  with liner, coating, or sleeve · CPC title

• F02F11/002

  involving cylinder heads · CPC title

• B23P6/02

  Pistons or cylinders · CPC title