PISTON FOR ENGINE

摘要

There is provided a piston for an engine capable of improving supply of engine oil to a recess based on further study of a piston on which a resin coating film is formed. A piston for an engine includes a skirt part 1, and a resin coating film 2 and a recess 3 formed on a surface of the skirt part 1. A plurality of the resin coating films 2 are discretely arranged in spots on the surface of the skirt part 1, and a mesh-like groove 4 is formed by the recess 3 provided between the resin coating films 2. The recess 3 formed on the skirt part 1 between the resin coating films 2 adjacent to each other in a piston circumference direction is set to be adjacent to another resin coating film 2 in a piston moving direction. An end part 2A of the resin coating film 2 in the piston moving direction is formed in a concave shape when seen in a piston radius direction.