| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a practical road noise reduction system. Ž<P>SOLUTION: The road noise reduction system includes a weight 8 held by a wheel, a weight operating device 10 for operating the weight so that the center of gravity of the weight moves toward and away from a wheel axis, and a controller for controlling the weight operating device. By changing the operating position of the weight, road noise is reduced. Specifically, when the road noise exceeds a set extent, the center of gravity of the weight is allowed to move away from the wheel axis. The moment of inertia of the wheel about the wheel axis thereby increases, reducing the road noise effectively. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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