Internal combustion engine liner
AssigneeH.E.F.
InventorsChristophe Heau, Laurent Bombillon, Philippe Maurin-Perrier
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Abstract
An inside surface of an internal combustion engine liner is treated to have a surface roughness Ra smaller than 0.06 μm, and then receives a DLC coating. A method of producing the internal combustion engine liner includes: forming the liner from a metal material, polishing an inside surface of the liner to obtain a polished inside surface of roughness Ra smaller than 0.06 μm, and applying the DLC coating to the polished inside surface.
Claims18
A liner for an internal combustion engine wherein an inside surface of said liner has no honing grooves, is treated by material removal ensuring a surface roughness Ra smaller than 0.06 μm, and then receives a DLC coating, all performed outside of the internal combustion engine.
A method of producing a liner for an internal combustion engine, with no honing operation, comprising:
- forming the liner from a metal material, polishing an inside surface of the liner by material removal to obtain a polished inside surface of roughness Ra smaller than 0.06 μm, and applying a DLC coating to the polished inside surface, wherein the polishing by material removal and the applying of the DLC coating are performed with the liner outside of the internal combustion engine.
A method of producing a liner for an internal combustion engine, with no honing operation, consisting of:
- forming the liner from a metal material, polishing an inside surface of the liner by material removal to obtain a polished inside surface of roughness Ra smaller than 0.06 μm, and applying a DLC coating to the polished inside surface wherein the polishing by material removal and the applying of the DLC coating are performed with the liner outside of the internal combustion engine.
Dependencies are inferred from the claim text.