PISTON MACHINE Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: machine has two pairs opposite cylinders 17 positioned on the housing, coaxial crankshafts 5-8 with balancing weights 1-4, central crankshaft 32 with flywheels 48 and 49, and central crank mechanism. The balancing weights are mounted in longitudinal recesses made in cylinder housing 9-12 and lateral recesses 18,19 made in rods of pistons 22,23 through slides 13-16 interconnected in pairs. The cylinder is provided with baffles to define two pairs of chambers of variable volume. The slides 40,41 of the crank mechanism are mounted in additional longitudinal recesses 39,40 made in the frame of cylinder housing 17. The pair of connecting rods 35 and 36 is coupled with cranks 33 and 34 of central shaft 32. The central shaft is provided with flywheels 48 and 49 and coupled with the shaft of slide valve 44 through gears 42,43, the gear ratio being equal to 1:2. The shaft of the slide valve is connected with the cylinder chambers and additional torus-like chamber of constant volume through passageways. EFFECT: enhanced efficiency. 2 dwg