Patent ID: 9062768
Filing Date: 2015-06-23
Classification: F02F,F16J,Y10T

Abstract:
1. A piston for an internal combustion engine, comprising: a piston body having an upper combustion surface and an annular cooling gallery surrounding an undercrown region with an outer wall depending from said upper combustion surface with an annular ring belt region formed in said outer wall adjacent said upper combustion surface, said ring belt region having at least one ring groove formed therein; and at least one oil passage extending continuously from said at least one ring groove to said cooling gallery, said at least one oil passage having a first portion depending radially inwardly from said at least one ring groove and a second portion ascending radially inwardly directly from said first portion to said cooling gallery, wherein said cooling gallery has a bottom surface, said at least one oil passage extending through said bottom surface, wherein said at least one oil passage includes a tubular member extending upwardly from said bottom surface.