PISTON UNIT Russian patent published in 1995 - IPC

FIELD: internal combustion engine. SUBSTANCE: main oil removing ring made of a resilient material is received in the groove of the piston. The ring has the top scraper interacting with the groove wall and bottom scraper having conical surface, the top of the cone being directed to the side of the high-pressure space. An oil removing ring, which interacts with the bottom scraper of the main two-scraper ring, is mounted inside the ring recess of the inertia member. A ring conical projection is made on the end face surface of the inertia member from the side of the top dead center. The projection is an extension of the internal cylindrical surface of the inertia member. The conical outer side interacts with the internal surface of the main oil removing ring when piston is in motion from the top dead center to the bottom dead center. EFFECT: enhanced reliability. 5 dwg