PISTON STRUCTURE OF ENGINE

摘要

PROBLEM TO BE SOLVED: To restrain resonance in a combustion stroke and noises in other strokes from increasing.SOLUTION: A piston structure of an engine comprises: a piston 1; a connecting rod 10 that has a small end 10a coupled to the piston 1; a piston pin 2 that couples the piston 1 and the small end 10a together; and a dynamic damper 20 that is provided within a piston pin 2 and that suppresses resonance in a combustion stroke. The dynamic damper 20 includes an assembling-type dynamic damper 20B that has a movable part 20b formed by assembling a mass adjusting part 50 to a stationary part 20a.