NONSECTIONAL PISTON FOR INTERNAL COMBUSTION ENGINE Russian patent published in 1998 - IPC

FIELD: mechanical engineering; pistons for internal combustion engines made by permanent mould casting of aluminium alloy. SUBSTANCE: outer diameter of inner ring cooled channel of piston os located at a distance of 0.4-3.0 of width of groove for upper compression ring from inner diameter of the groove. Upper part of surface of ring cooled channel at side of piston bottom is made at a distance equal to size of groove from groove upper surface. To increase area of cooled surface, surface of ring cooled channel at side of piston bottom can be provided with projections and cavities over entire perimeter of cooled channel. EFFECT: enlarged operating capabilities, improved cooling of piston in operation. 5 dwg