Patent ID: 6829977
Filing Date: 2004-12-14
Classification: F02F

Abstract:
An internal combustion engine comprising:a) a constructed piston having a longitudinal axis, said piston comprising a piston head made of steel, a lower piston part, and a single screw connecting said piston head to said lower piston part, said screw having a screw head and being arranged along or close to said longitudinal axis; b) a central cooling space between said piston head and said lower piston part; c) an oil-carrying connecting rod connected by a piston bolt to said lower piston part; and d) a sliding block provided near said screw head for delivering cooling oil from said connecting rod into said central cooling space, said screw head being disposed at least partially radially within said sliding block; wherein the cooling oil is guided from said sliding block into said central cooling space via a spacer with radial intake bores, said screw having a portion surrounded by oil arranged within said spacer.