Coated cylinder liner
AssigneeGM Global Technology Operations LLC
InventorsJianghuai Yang, Qigui Wang, Dale A. Gerard
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Abstract
A method of forming an engine component includes providing a cylinder liner main body having a curved interior wall forming a cylinder bore extending along a bore axis and a curved exterior wall formed circumferentially about the curved interior wall. The method includes disposing a coating layer onto the interior wall and the exterior wall. A cylinder liner is provided that includes a main body and a coating layer disposed on an exterior wall and on an interior wall of the main body.
Claims8
A cylinder liner for an internal combustion engine, the cylinder liner comprising:
- a main body having a curved interior wall forming a cylinder bore extending along a bore axis and a curved exterior wall formed circumferentially about the curved interior wall;
- and
- a coating layer disposed on the interior wall and the exterior wall,
- the main body being formed of a first material, the first material being gray cast iron, and the coating layer being formed of a second material, the second material being an aluminum alloy comprising silicon,
- further comprising a top layer disposed on the coating layer, the top layer being formed of a majority of zinc.
A method of forming an engine component, the method comprising:
- providing a cylinder liner main body having a curved interior wall forming a cylinder bore extending along a bore axis and a curved exterior wall formed circumferentially about the curved interior wall and forming the cylinder liner main body of a first material;
- disposing a coating layer onto the interior wall and the exterior wall to create a coated cylinder liner and providing the coating layer as being formed of a second material, the first and second materials being dissimilar from one another, wherein the step of disposing the coating layer onto the interior wall and the exterior wall comprises hot dipping the cylinder liner main body into a molten bath formed of the second material, and wherein the coating layer disposed on the exterior wall defines an outer surface of the coated cylinder liner;
- casting an engine block over the outer surface of the coated cylinder liner after the step of disposing the coating layer onto the interior wall and the exterior wall;
- and
- removing the coating layer from the interior wall after the step of casting the engine block over the outer surface.
Dependencies are inferred from the claim text.