METHOD AND APPARATUS FOR DISSIPATING HEAT FROM A COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE

摘要

Air-cooling of a piston in an internal combustion engine is provided. A passageway is configured to pass a portion of the combustion air as the piston reciprocates in the cylinder. The passageway includes a through hole in the wrist pin or mutually aligned openings in the skirt of the piston, preferably above the wrist pin, and a corresponding opening in the engine block to transfer air therethrough. The additional air supplied therethrough is sufficient to substantially reduce heat transferred from the piston upper surface portion to the skirt of the piston.