Patent ID: 8955486
Filing Date: 2015-02-17
Classification: F02F

Abstract:
1. A piston for an internal combustion engine, comprising: a body extending along a longitudinal central axis, said body including an upper combustion wall having an upper combustion surface, a cylindrical outer wall with a ring belt region adjacent said upper combustion surface, a pair of pin bosses beneath said upper combustion wall; a closed annular cooling gallery located radially inwardly from said ring belt region; a cooling medium contained in said cooling gallery; and said cooling gallery having an inner surface bounding said cooling gallery, said inner surface including a radially outermost portion that extends along an axis that converges from said upper combustion wall toward said longitudinal central axis, wherein said radially outermost portion extends along said ring belt region, and wherein said axis along which said radially outermost portion extends is inclined between 1-30 degrees relative to said longitudinal central axis.