| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-parts piston capable of cooling the oil of a crown part. SOLUTION: A duct formed from a part near an upper part of a skirt of the two-piece piston carries the lubricant to a skirt pin hole provided in each side of the skirt to lubricate a pin connection part. The skirt is provided with a lubricant passage formed from a shaker tray to the pin hole provided in each side of the piston connection part of a wrist pin, to which a rod continuously provided to the piston is fastened, through the skirt and a piston crown strut. The fluid, sprayed toward the crown, flows down onto the skirt, but a part thereof passes through the lubricant duct, namely, a passage for directly and continuously lubricating the pin joint.
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