| 摘要 |
PURPOSE:To markedly improve the vibration characteristic and the drive feeling by switching the damping force of rubber bushes by operating a throttle switching means according to the front and rear acceleration speed under a spring and speedily damping the low-frequency vibration. CONSTITUTION:A tension rod 1 consists of a rod body 2 and rubber bushes 3 and 4, and the rubber bush 3 is axially supported onto a chassis-side member, and the rubber bush 4 is axially supported onto a sheel-side member. The outer cylinder 5 of the rod body 2 and the side plates 7 and 8 are fixed, and a fluid chamber 9 is formed inside a rubber elastic body 6. A variable throttle 17 which can vary the amount of throttle of a fluid passage 16 is formed in the intermediate part in the axial direction of the body 2, and said throttle 17 is equipped with a throttle body 18 and a valve piece 19. A permanent magnet 22 is fixed at the edge part projecting upwardly from the body 18, and the exciting driving for coils 23 and 24 is performed by the driving electric current as the control signal outputted from a throttle switching circuit. |
