Back to results
US 2009/0151689 A1Published application
Internal combustion engine component and method for producing the same
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsShinya Iwasaki, Hiroshi Yamagata, Hirotaka Kurita
Life of this patent
Estimating the term…
Abstract
An internal combustion engine component is composed of an aluminum alloy containing silicon, and includes a plurality of silicon crystal grains located on a slide surface. The slide surface has a ten point-average roughness RzJIS of about 0.54 μm or more, and a load length ratio Rmr(30) at a cut level of about 30% of the slide surface is about 20% or more.
Claims14
1-13. (canceled)
An internal combustion engine component composed of an aluminum alloy containing silicon, comprising:
- a plurality of silicon crystal grains located on a slide surface;
- wherein
- the slide surface has a ten point-average roughness RzJIS of about 0.54 μm or more, and a load length ratio Rmr(30) at a cut level of about 30% of the slide surface is about 20% or more.
A method for producing an internal combustion engine component having a slide surface, comprising:
- a step of providing a molding which is composed of an aluminum alloy containing silicon and which includes primary-crystal silicon grains and eutectic silicon grains near a surface;
- a step of polishing the surface of the molding by using a hone having a grit number of # 1500 or more;
- and
- a step of etching the polished surface of the molding to form a slide surface from which the primary-crystal silicon grains and eutectic silicon grains protrude.
1 more element
Dependencies are inferred from the claim text.