OIL CONTROL DEVICE OF CYLINDER-PISTON GROUP Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: fitted in piston groove is box-section oil control ring with upper and lower hooks and pressing device. Apex of bevel surfaces of lower hook points to combustion chamber. Pressing device is made in form of ring installed under oil control ring and engaged with pressure lugs arranged in piston groove. Pressure lugs pass through slots made in piston and are rigidly secured on threaded ring installed for moving on thread made on inner surface of piston. Made on surface of threaded ring facing the connecting rod in plane of its rolling are two diametrically opposite teeth installed for alternate engagement with teeth made on connecting rod at both sides from its axis in plane of rolling of connecting rod. EFFECT: enhanced quality of operation. 2 cl, 7 dwg