PISTON-PIN BOSS OF A PISTON FOR AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a piston-pin boss (18) of a piston (6) for an internal combustion engine, comprising a piston-pin bore (1) for receiving a piston pin. To improve the passage of oil and to form an oil reservoir, the interior surface (2) of the bore comprises a transversal groove (5) that lies parallel to the longitudinal axis (3) of the piston-pin bore (1) and opens towards the exterior of the piston and an oil circulation groove (4) that intersects the transversal groove (5) and encircles the longitudinal axis (3).