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US 2015/0176518 A1Published application
Cylinder for application on an internal combustion engine
AssigneesMahle Metal Leve S/A, Mahle International GmbH
InventorsSamantha Uehara, Paulo J. Da Rocha Mordente, Edney D. Rejowski
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Abstract
A cylinder for an internal combustion engine may include a metallic cylinder body and an amorphous diamond-like hard carbon film disposed on an internal peripheral surface of the cylinder body. The amorphous diamond-like carbon film may include a roughness ranging from Rz 0.5 μm to Rz 4.0 μm.
Claims20
A cylinder for an internal combustion engine, comprising:
- a metallic cylinder body and an amorphous diamond-like hard carbon film disposed on an internal peripheral surface of the cylinder body, wherein the amorphous diamond-like carbon film includes a roughness ranging from Rz 0.5 μm to Rz 4.0 μm.
A cylinder for an internal combustion engine, comprising:
- a metallic cylinder body having an internal peripheral surface;
- an amorphous diamond-like carbon film disposed on the internal peripheral surface, the amorphous diamond-like carbon film including a roughness ranging from Rz 0.5 μm to Rz 4.0 μm, the roughness including valleys and peaks, wherein the valleys include an average valley roughness that is at least three times greater than an average peak roughness of the peaks;
- wherein the amorphous diamond-like carbon film includes a hardness ranging from 1000 Hz to 3000 Hz and a thickness between 1 μm and 30 μm.
Dependencies are inferred from the claim text.