Piston for internal combustion engine, has cooling channel circularly rotated in piston head, and circularly formed component freely and movably arranged in cooling channel and formed as open or closed ring with circular cross section

摘要

The piston (10) has a cooling channel (19) circularly rotated in a piston head (11). A circularly formed component (24) is freely and movably arranged in the cooling channel. The component having a circular cross section is utilized as an open or closed ring and arranged undulatory over circumference. Diameter of the component corresponds to diameter of zenith (19') of the cooling channel. The component exhibits a structured surface, and is made of metallic material or plastic.