INTERNAL COMBUSTION ENGINE SLEEVE ASSEMBLY Russian patent published in 2018 - IPC F02F5/00 F02F3/00 

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engines. Ice sleeve assembly comprises cylinder (1), the inner surface of which is made in the form of a truncated cone with a large base in the lower part and a smaller base in the upper part, piston (2) and compression rings (3), (5) and (6). Working surface of compression rings (3), (5) and (6) is made in the form of a cone with a slope to its upper end. Outer surface of piston (2) is made conical with a cone angle equal to the cone angle of the cylinder inner surface (1). In addition, oil-scraper rings (7), (8), (9) are installed, the working surfaces of which are made at an angle to the wall of cylinder (1). All rings are located in one piston bore (12). Upper part (4) of bore (12) is formed with a smaller radius to form a step. Upper compression ring (3) is installed in upper part (4) of the bore. Surface area of the upper end of upper compression ring (3) is equal to the area of the vertical surface of its inner diameter. Radial thickness of upper compression ring (3) is equal to the radial depth of upper part (4) of bore (12). Middle compression ring (5) is located under upper compression ring (3). Middle compression ring (5) is provided with a crimping spring ring (11), whose outer radius is greater than the inner radius of upper compression ring (3). Inner radius of middle compression ring (5) is greater than the inner radius of upper and lower compression rings (3) and (6). Radial thickness of lower compression ring (6), upper and lower oil-removal rings (7), (9) is equal to bore depth (12). Middle oil-scraper ring (8) has crimping spring ring (10).

EFFECT: technical result consists in increase of sealing efficiency between the cylinder and piston.

1 cl, 1 dwg