Piston cooling fin

Modern internal combustion engines produce high temperatures and pressures in the combustion chamber of the engine that place immense stresses on the engine's pistons. These temperatures and pressures can cause pistons to deform or wear and prematurely fail. One of the primary means of overcoming these detrimental effects on a piston is increasing the efficiency of heat rejection from the piston. One method of increasing the amount of heat drawn away from the piston is increasing the surface area of the inner surface of the piston crown so that a cooling medium, such as oil, can contact the inner surface and draw heat therefrom. Installing or forming an annular fin in the underside of the piston increases the surface area for oil to contact and permits precise targeting of piston locations from which heat is to be evacuated. Such annular fins can be quickly and easily installed or formed for use with any type of pistons, such as forged, cast, composite or mechanically joined pistons.