| 摘要 |
Disclosed is a reciprocating piston engine, comprising a combined structure with an optimized double-crankshaft and variable compression ratio pistons, characterized in that the variable compression ratio piston is a piston serving as a double-acting hydraulic cylinder, a control valve bush of a slide-valve type directional control valve is fixed in a central mounting hole of the inner piston, and a control valve core is mounted in a rotatory sliding or nut-ball screw manner in a central mounting hole in the inner surface of the piston top; and the double-crankshaft engine is formed by two reverse rotating crankshafts which are coupled by gears to be in synchronous reverse rotation motion together, each piston being connected to a connecting rod shaft of two crankshafts, and a piston control valve driving mechanism being mounted between the two crankshafts. The directional control valve type double-acting hydraulic cylinder designed in the present invention can change the liquid distribution in the hydraulic cylinder to change the piston length merely by rotating the control valve core. The combination of variable compression ratio pistons and double-crankshaft engine can reduce the difficulty in processing and mounting the variable compression ratio pistons and also take the advantage of small mechanical loss of double-crankshaft engines. |
