PISTON OF INTERNAL COMBUSTION ENGINE Russian patent published in 1998 - IPC

FIELD: mechanical engineering; diesel engines. SUBSTANCE: piston has two circular projections 16 in form of sectors of hollow round cylinder coaxial with head 1 and mated through inner surface 18 with inner end face surface 9 of bottom 2. Outer surface 17 of circular projections 16 has diameter less than diameter of bottom 14 of lower groove 11 for lower oil control ring and is mated plane of through slots 15 forming clearance "a" with inner surface 7 of skirt 6. Both surfaces 17 and 18 are mated with sides 10 of bosses 4, and with each other, through ends face surface 19. EFFECT: improved manufacturability of piston owing to the fact that temperature compensator half-rings should not be fitted in mould and piston is made of separate parts; improved performance characteristics of piston which has smaller mass at equal rigidly provided by circular projection; effective dissipation of heat by circular projections which provide also reliable stabilization of sizes and shape of piston at heating. 3 cl, 3 dwg