CYLINDER-PISTON GROUP OF INTERNAL COMBUSTION ENGINE Russian patent published in 2009 - IPC F02F5/00 

FIELD: engines and pumps.

SUBSTANCE: cylinder-piston group of internal combustion engine includes cylinder (1) and piston (2) in the piston groove of which there installed is compression ring (3) with taper working surface. Internal surface of cylinder (1) is made in the form of flattened cone with larger base in the lower cylinder part and smaller base in upper cylinder part, and working surface of compression ring (3) is made in the form of a cone inclined towards its upper edge; at that, cone angle of the working surface of ring α_r is less than cone angle of cylinder α_c by the value of its variation as the result of thermodynamic cylinder deformations taking place during engine operation.

EFFECT: increasing engine power and life time, decreasing fuel and oil consumption, improving environmental engine properties, increasing efficiency of piston sealing.

1 cl, 1 dwg