Cylinder liner with its inner peripheral surface formed with...

Details Cylinder liner with its inner peripheral surface formed with... Cylinder liner with its inner peripheral surface formed with...

2006-06-13

2006-06-13

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

Reexamination Certificate

active

07059290

ABSTRACT:
A cylinder liner for use in an internal combustion engine has an inner peripheral surface at which a surface treatment layer is formed upon water vapor treatment. The surface treatment layer has a surface configuration capable of providing excellent lubrication oil retaining function and initial break-in property as well as capable of being machined easily. The treatment surface of the cylinder liner has a plateau configuration providing a surface roughness Rz of 0.8 to 5.9 μm, and the plateau configuration is defined under DIN4776 by a reduced peak height Rpk of not more than 0.64 μm, a core roughness depth Rk of 0.05 to 1.8 μm, and a reduced valley depth Rvk of 0.15 to 3.3 μm. For grinding to the surface, a honing machine employs a grindstone containing metal bonded diamond grains at high density. Diamond grain size is not less than 4000.

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patent: DIN4776 (1990-05-01), None
patent: 0 693 618 (1996-01-01), None
patent: 60-237145 (1985-11-01), None
patent: 61-157875 (1986-07-01), None
patent: 08-02197 (1996-01-01), None
patent: WO 01/33065 (2001-05-01), None

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