INTERNAL COMBUSTION ENGINE Russian patent published in 2000 - IPC

FIELD: road and water vehicles; power plants. SUBSTANCE: mechanism converting reciprocating motion of pistons into rotary motion of shaft is connected with engine main shaft by connecting rods through alternate internal meshing gear train. Gear of train is mounted on straight shaft fitted in antifriction bearings arranged in cylinder block supports. Outline of wheel is made up of different curvature sections forming, for instance, an oval. Smaller curvature side toothed surfaces of oval engage alternately with gear. One toothed side surface of oval corresponds to direct stroke of piston, and the other, to return stroke. Larger curvature upper and lower surfaces of oval are made smooth, but their curvature is smaller than that of gear teeth. In working cycle they correspond to phase of change of piston movement direction. Gear of train is provided with cam engaging with stops alternately during the working cycle, stops being installed in parallel with wheel toothed side surfaces. Wheel of gear train is hinge-coupled with connecting rods of pistons of two opposite cylinders at both sides of oval longitudinal axis. Joints are provided with angular movement stops made in form of resilient rod rigidly and perpendicularly installed on wheel axle for bending in hole made in connecting rod head within the limits of elastic deformation. Hole on section of conjugation with rod is made with one-side tilting of generatrix sufficient for elastic bending of rod in hole at maximum angularity of connecting rod - wheel axle and deflection for noncontact displacement of free-from-engagement wheel toothed side surface relative to gear. Rod of other joint, in period of unidirectional movement, restores its rectilinearity in hole and stabilizes position of wheel-connecting rod axle. EFFECT: increased efficiency, reliability and service life of engine. 5 dwg