FIELD: mechanical engineering; internal combustion engines.
SUBSTANCE: invention can be used in cylinder-piston groups of piston machines and internal combustion engines. Proposed cylinder-piston group has cylinder, piston fitted in cylinder with crown and side surface provided with compression rings. Piston is provided with cavity in crown limited from top by cover plate with central hole. Cavity is provided with curvilinear projection arranged along axis of piston. Channel laid from cavity to side of cylinder face are formed by curvilinear surface and cover plate, and made narrowing and provided with outlets over perimeter of piston crown in zone of crown. Channels have different direction.
EFFECT: improved sealing in clearance between piston and cylinder, increased life of cylinder-piston group, reduced discharge of toxic combustion products.
2 dwg
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