PISTON SEAL OF INTERNAL COMBUSTION ENGINE Russian patent published in 2016 - IPC F02F5/00 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly to design, production and operation of internal combustion engines, and increases power and service life of engine, reducing fuel and oil consumption, improving environmental characteristics of engine. Piston seal of internal combustion engine comprises piston groove of the piston upper compression ring of rectangular profile, bottom compression ring has one-way trapezoidal profile, its lower end is made at an angle to its upper end, the smaller side faces the axis of the cylinder, expanding ring is located under the bottom compression ring and its upper end has the same angle of inclination, as the angle of inclination of the lower end of the bottom compression ring, note here that inner diameter of upper compression ring is less than inner diameter of the bottom compression ring on the value of the radial thickness of the expander installed along the inner diameter of the upper compression ring.

EFFECT: higher reliability.

2 cl, 1 dwg