Patent ID: 6886521
Filing Date: 2005-05-03
Classification: C23C,F01L,F16C,F16G,F16J

Abstract:
1. A sliding structure for an automotive engine, comprising: a sliding member being one selected from the group consisting of a piston ring, a piston pin, a piston skirt, a cam lobe, a cam journal, a plain bearing, a rotary vane and a timing chain, and including a sliding portion; and a lubricant applied to the sliding portion so that the sliding portion can make sliding contact with a counterpart member via the lubricant, wherein the sliding portion has a base made of either a steel material or an aluminum material and a hard carbon film formed on the base to coat the sliding portion, and the hard carbon film has a thickness of 0.3 to 2.0 μm, a Knoop hardness of 1500 to 4500 kg/mm where h is the thickness (μm) of the hard carbon film; and Hk is the Knoop hardness (kg/mm 2 ) of the hard carbon film.