FIELD: mechanical engineering; designing of piston engines. SUBSTANCE: pair of opposed pistons is connected by unit of link limited by opposite parallel guide surfaces perpendicular to piston axes. Drive unit is installed for rotation of crankshaft crankpin in bearing shell and is provided with parallel support plates engaged for sliding with guide surfaces. Lubricating oil is delivered into holes in support plates from front and rear channels in crankpins, holes in bearing shells and channels in drive unit just before considerable loading of each plate. EFFECT: enlarged operating capabilities. 5 cl, 6 dwg
