| 摘要 |
PROBLEM TO BE SOLVED: To reduce the air column resonance sound generated from a tire. SOLUTION: A fluid chamber 30 formed in a side wall of the tire 20 is filled with a magnetic viscous fluid whose viscosity changes according to the external magnetic field. In the side wall, a coil 32 is installed in such a way as surrounding the fluid chamber 30, and is supplied with electric current from a power supply 38. A control device 34 controls the current supplied to the coil 32 from the power supply 38 in such a way as reducing the specific vibratory component of the vibrations generated in the tire, sensed by a vibration sensor 40. COPYRIGHT: (C)2007,JPO&INPIT
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