FIELD: engine engineering. SUBSTANCE: two units of noncircular gear wheel 3,4, which engage with each other, are positioned between outer 1 and middle 2 walls. Each unit includes four noncircular gear wheels which form working chamber of alternative volume. Wheels 4 are fitted on axles 7 which set in bearings and are provided with gear wheels 9 that are the same as gear wheels 10 fitted on main power shaft 11. Noncircular gear wheels 3 are fitted on axles 12 which are set in bearings of middle wall 2. Main power shaft 11 is set in main bearings 13 of outer walls 1 and middle wall 2. Power shaft 11 is provided with flywheel 14 and cam disks 15. Ends of power shaft 11 are provided with clutch parts 16 used for coupling with the same clutch parts of adjacent engine units or power consumer. EFFECT: enhanced efficiency. 4 cl, 12 dwg
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