| 摘要 |
PURPOSE: A torsional vibration reducing device of a crankshaft is provided to improve the durability of a crankshaft and to effectively reduce the vibration noise of the crankshaft by controlling the characteristics of a damper. CONSTITUTION: A torsional vibration reducing device of a crankshaft comprises a measuring unit(10) measuring the torsional vibration of a crankshaft(70) and consisting of a pulse sensor, a controller(20) outputting a power control signal by comparing the torsional vibration measured by the measuring unit and the reference vibration inputted by a reference value generating unit(30), a power supply unit(40) changing the voltage supplied from a battery(50) depending on the voltage control signal of the controller, and a variable damper(60) of which characteristics are controlled by the power supplied from the power supply unit.
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