FIELD: engines and pumps.
SUBSTANCE: piston engine 1 comprises top first ring 5 arranged nearby upper surface 4 of piston 3 that limits combustion chamber 2, second piston ring 6, arranged nearby top ring 5, circular gas chamber 7 limited by top ring 5 and second ring 6, and one or multiple channels 8 to communicate circular gas chamber 7 and engine combustion chamber 2. Top ring 5 and second ring 6 are inclined towards direction X wherein piston 3 reciprocates so that distance between aforesaid rings is greater on piston pressure side 9 than that on passive side 10.
EFFECT: reduced probability of damaging rings and cylinder inner surface.
3 cl, 3 dwg
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