SLIDING SUPPORT STRUCTURE OF PISTON PIN

摘要

PROBLEM TO BE SOLVED: To provide a sliding support structure of a piston pin, which reduces a friction loss by generating a sufficient oil film pressure in a load concentrated portion even when the load concentrated portion exists. SOLUTION: The sliding support structure of a piston pin 120 supplies a lubricating oil between sliding surfaces of relatively rotatable piston pin 120 and piston pin boss 106, wherein regions Y higher in oil repellency than other regions are provided in a sliding surface region of the piston pin 120 on the upstream side and downstream side in a flow direction of the lubricating oil so as to sandwich therebetween a sliding surface region X corresponding to the load concentrated portion of the piston pin 120 and piston pin boss 106. COPYRIGHT: (C)2011,JPO&INPIT