FIELD: mechanical engineering; internal combustion engines with swirl-type combustion chamber in cylinder head. SUBSTANCE: engine has cylinder-piston group with spark plug (nozzle) in cylinder head, combustion chamber in cylinder head with device to provide swirl movement of working medium at scavenging from open channels on neck of combustion chamber. Channels on neck are connected into pairs and into system. One channel of each pair and system has cylindrical wall with tangentiality angle α and spirality and β,, and second channels has wall additionally profiled under tangentiality and spirality angles γ,θ and θ′.. EFFECT: improved thermodynamic properties of engine. 4 dwg
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