Piston

Pistons of internal combustion engines are thermally highly stressed components, especially in the area of the piston crown (4) and the piston ring zone (1). It is therefore necessary to provide adequate cooling while simultaneously reducing piston weight. This has generally led to piston designs that require complex, i.e. cost-intensive, manufacturing and machining processes. The new piston is intended to ensure adequate cooling while simultaneously reducing weight and allowing for simple manufacturing and machining. The object is achieved by the piston according to the invention in that the spacious outer cooling recesses (20) have a conical shape, which are open toward the cylinder liner, extend upward to behind the ring grooves (2a,b,c), and are furthermore connected via an opening (25) to inner cooling recesses (21) that are open inward and downward. This provides a large opening to catch the oil as the piston descends. The cooling effect is thereby further improved. The inclined orientation of the outer cooling recesses can be produced in a simple manner by milling or stamping processes.