US 10,393,059 B2Granted

Cylinder liner for an internal combustion engine and method of forming

AssigneeFord Global Technologies, LLC

InventorsPrasad Kamat, Jonathan Robert Burns, Daryl Gene Self, Bryan McKeough

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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 section of the outer surface of the liner is machined to provide a second texture extending circumferentially about the liner and spaced apart from the first end, wherein the second texture has a lower specific surface area than the first 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 different textures to form material interfaces with the block with different thermal conductivities thereacross.

Claims11

Dependent claims

An engine cylinder liner comprising:

a tubular member having first and second ends with an outer surface extending therebetween, a specific surface area and a diameter of the outer surface varying with an axial position on the liner to provide a thermal conductivity that varies with the axial position and is complementary to engine operating conditions, wherein the specific surface area varies with a corresponding change in diameter, wherein the outer surface of the liner defines a first axial section with a first texture and a second axial section with a second texture, a specific surface area of the first texture being greater than a specific surface area of the second texture, an outer diameter of the liner at the first texture being greater than an outer diameter of the section of the liner with the second texture.

Dependencies are inferred from the claim text.