FIELD: mechanical engineering; power engineering. SUBSTANCE: engine has cylindrical block with head, crankcase and sump, crankshaft with crankpin bearings and pistons with rods arranged in cylinders. Piston rods have horizontally arranged spaces in lower portion resting on crankpin bearings of crankshaft and through sides, on vertical guides. They are coupled with plate of rod of near cylinder for engagement with pistons through flexible rods and sheaves installed in lower part of sump. EFFECT: increased efficiency due to prevention of deflection of piston rods to sides and ensuring vertical movement of piston rods, and improved compression in cylinders. 2 cl, 2 dwg
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