PISTON OF INTERNAL COMBUSTION ENGINE, AND THE INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a piston of an internal combustion engine capable of suppressing local pressure rise in a clearance between the side face of the piston and the inside face of a cylinder while suppressing the sealing performance degradation of a piston ring mounted in a top ring groove, and to provide the internal combustion engine.SOLUTION: In a side face 321 of a top land 32 as a site between a piston top surface 30 and a top ring groove 31A, a recirculation groove 35 is provided extending from the top ring groove 31A to the piston top surface 30.