| 摘要 |
A multi mode torsion damper system is provided to control vibrations of various frequency bands by controlling stiffness variably between inner and outer masses by a spring. A multi mode torsion damper system comprises a torsion damper(10), outer and inner mass actuators(21a,21b,21c,21d), a spring(26), an engine rpm sensor, a vibration sensor, a hydraulic pressure supplying part, and an ECU(Electronic Control Unit). The torsion damper is formed with paths(13) along the circumference thereof. The outer and inner mass actuators are fixed at the outer and inner masses respectively. The spring, installed between the outer and inner mass actuators, adjusts the stiffness by controlling the length by operation of each actuator. The hydraulic pressure supplying part supplies oil through oil lines(24,25). The ECU outputs a control signal based on signals of the engine rpm sensor and the vibration sensor, controls the operation of the actuator by controlling the hydraulic pressure supplied to each actuator, controls the length of the spring, and adjusts the stiffness.
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