| 摘要 |
PROBLEM TO BE SOLVED: To reduce engine noise, without making a piston structure complicated.SOLUTION: A dynamic vibration absorber 5 is incorporated into a cylindrical piston pin 3 of an engine. The dynamic vibration absorber 5 includes: a support part 6 provided inside the piston pin 3; a rod 7 cantilevered by the support part 6, extending in an axial direction of the piston pin 3, and vibrating in a radial direction of the piston pin 3 with the support part 6 as a fulcrum; and a cylindrical body 8 cantilevered by the rod 7, extending in the axial direction of the piston pin 3, and vibrating in the radial direction of the piston pin 3 with a portion supported by the rod 7 as a fulcrum.SELECTED DRAWING: Figure 3 |
