PISTON FOR INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE WITH THE SAME

摘要

A piston (10) for an internal combustion engine including: a piston head (11) located at an uppermost section of the piston; a land (12) located on a circumference of the piston head (11); a skirt (13) located below the land (12); and a pair of pin bosses (14) located on the lower section of the piston head (11 ). The piston head (11 ) has a first cavity (24) on the bottom of the piston head (11). Each of the pair of pin bosses (14) has a second cavity (20) in an outer upper section of the pin boss (14). The pin boss (14) has a through hole (21) that communicably connects the first cavity (24) with the second cavity (20).