OIL WIPER PISTON DEVICE FOR INTERNAL-COMBUSTION ENGINE

摘要

FIELD: machine building.SUBSTANCE: in piston groove a top trapezoidal oil wiper ring, trapezoidal spacer and bottom trapezoidal oil wiper ring are installed, ay top ends face of the bottom trapezoidal oil wiper ring the radial slots are made to drain oil removed from the cylinder wall by top ring to the near-bottom cavity of the piston groove and further via the cone holes to the internal piston cavity. Work surfaces of the oil wiper rings are profiled such that surplus oil is removed from the cylinder wall during the piston movement to the bottom position only, and on the cylinder wall a minimum necessary thickness of the hydrodynamic lubricating layer is created ensuring minimum mechanical losses for friction of the piston rings and minimum engine oil consumption for burn-off losses.EFFECT: improved reliability of the oil wiper piston device.2 cl, 1 dwg