| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a piston for an internal combustion engine in which an area of deformation of a piston skirt part in accordance with a cylinder by thrust force is extended to the whole area of the piston skirt part, the piston skirt part is brought into surface contact with the cylinder, a contact area of the piston skirt part with the cylinder is increased, a contact surface pressure between the piston skirt part and the cylinder is reduced, a tilt amount of the piston is suppressed, and friction loss is reduced in a suitable posture close to upright, and smooth reciprocation can be achieved.SOLUTION: First thin parts (21A, 21B) continued to piston side walls (13A, 13B) are provided on a piston skirt part (9) of a piston (5). The first thin parts (21A, 21B) are extended upward from a lower end of the piston skirt part (9), and are arranged below an axis (Z) of piston pin holes (14A, 14B).</p> |
