| 摘要 |
<p>The piston(1) of this invention is so profiled that the diametric reduction of the shoulder portion(7) of the skirt(3) is greater on the thrust side than on the counter-thrust side and that the difference in diametric reduction between the thrust side and the counter-thrust side is maximum at around a position corresponding to the center of the piston pin(4). In the compression stroke, the piston(1) moves up pressed against the cylinder liner wall(8) on the counter-thrust side but the inclination angle of the piston(1) at this time is small. Near the top dead center, the piston(1) is rapidly pivoted and strikes against the cylinder liner wall(8) on the thrust side. The point on the piston(1) hitting the cylinder liner wall(8) is at around a position equal in height to the center of the piston pin(4). This reduces the impact force of the piston(1) and therefore the slap. <IMAGE></p> |
