MULTIPIECE PISTON RING Russian patent published in 2001 - IPC

FIELD: mechanical engineering; internal combustion engines, compressors and other piston machines. SUBSTANCE: multipiece piston ring has all-curved tangential expander and plate coiled rings made from rectangular section metal bands with rounded off edges whose width B and b corresponds to relationships b/B=0,45±0,15 thickness corresponds to relationship h/H = 0,85±0,15 and end stops of all-curved tangential expander are arranged at angle α of 95-120 deg relative to radial support flanges. EFFECT: improved control efficiency of piston ring, provision of reliability and long service life of cylinder-piston group of engine, reduced consumption of fuel and oil and pollution of ambient atmosphere. 2 cl, 8 dwg