Cylinder liner for an internal combustion engine and method of forming
AssigneeFord Global Technologies, LLC
InventorsJonathan BURNS, Robert RENTSCHLER, Brian NELLENBACH
Life of this patent
Estimating the term…
Abstract
A method of forming an engine is provided. A liner is cast with an outer surface with a first texture extending circumferentially from a first end to a second end of the liner. A circumferential section of the outer surface of the liner is coated with an insulative, thermoset material with a lower thermal conductivity than the texture. An engine and a cylinder liner for the engine are provided. The liner has first and second ends with an outer surface extending therebetween. An outer surface of the liner has axial sections defining a texture and an insulative thermoset coating to form material interfaces with the block with different thermal conductivities thereacross.
Claims20
An engine comprising:
- a cylinder liner having an outer surface and an inner surface extending from a first end to a second end of the liner;
- and
- a cylinder block formed about the cylinder liner with a first end of the liner adjacent to a deck face of the block, the block defining a cooling jacket extending circumferentially about at least a portion of the outer surface of the liner and spaced apart therefrom;
- wherein a first circumferential section of the outer surface of the liner has a texture forming a first material interface with the block, the first material interface having a first thermal conductivity thereacross;
- wherein a second circumferential section of the outer surface of the liner has the texture with a coating provided thereon and forming a second material interface with the block, the coating comprising a thermoset resin, the second material interface having a second thermal conductivity thereacross, the second thermal conductivity being less than the first thermal conductivity;
- and
- wherein the first circumferential section is positioned between the first end and the second circumferential section.
A method of forming an engine comprising:
- forming a liner having an outer surface defining a texture extending circumferentially about the liner;
- and
- providing a coating comprising a thermoset material on a portion of the texture spaced apart from an end of the liner and extending circumferentially about the liner, the coating having a lower thermal conductivity than the liner.
An engine cylinder liner comprising:
- a tubular member having first and second ends with an outer surface extending therebetween and defining an axial section with a texture, the texture and the liner having a first thermal conductivity;
- and
- a coating provided circumferentially about only a portion of the axial section, the coating comprising a thermoset material having a second thermal conductivity that is less than the first thermal conductivity.
Dependencies are inferred from the claim text.