Internal combustion engine has reciprocating piston in cylinder, where movement of reciprocating piston moves crank shaft in rotating motion by piston rod

摘要

The internal combustion engine has a reciprocating piston (4) in a cylinder (Z), where the movement of the reciprocating piston moves crank shaft in a rotating motion by a piston rod (6). The piston pin boss (4w) has grooves (20) in V-shape arranged parallel with respect to piston pin axis.