FIELD: engine engineering. SUBSTANCE: engine has housing 1, crank shaft webs of which are made up as gear wheels 4 with additional bearing toothings 10. The gear box is constructed as driven shaft 5 provided with movable gears 6 and rigidly secured to additional supporting wheels 9. Main support wheels 8 are mounted on two auxiliary axles 7. Reverse gear 14 is mounted on axle 13. Auxiliary axles 7 and rotation axis of driven shaft 5 are arranged on both sides of crankshaft 3 to define tops of a triangle in the plane perpendicular to the axis of rotation of the crank shaft. The main and additional supporting wheels 8 and 9 interact with the additional bearing toothing 10 of gear wheels 4 resulting in decreasing loading on crankpins of the crankshaft. EFFECT: enhanced efficiency. 2 cl, 2 dwg
