| 摘要 |
PURPOSE: An engine crankshaft is provided to improve power transmission efficiency by rotating a flywheel with the torque transmitted from two crankshafts and to vary a compression ratio of mixed gas by changing combining position of the flywheel and a driven gear. CONSTITUTION: An engine crankshaft comprises a main gear(2) formed coaxially with a flywheel(1), first and second driven gears(3,4) combined to both ends of the main gear to rotated in engagement with the main gear, first and second crankshafts(5,6) axially supported on the first and second driven gears while having plural crank pins(7) for combination with a piston. As the flywheel is rotated by the rotational force transmitted from the two crankshafts, the transmission efficiency of power generated from an engine is improved. By the changing combining position of the flywheel and the driven gears, a compression ratio of mixed gas of the engine is varied.
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