| 摘要 |
A fluid-filled vibration damping device includes an elastic body connecting two mutually spaced-apart first and second mounting members and partially defining a primary fluid chamber filled with a non-compressible fluid, a flexible diaphragm partially defining an auxiliary fluid chamber whose volume is variable, a first partition wall fixed to the second mounting member so as to define one side thereof the primary fluid chamber and the other side there of the auxiliary fluid chamber, a first orifice passage formed at a central portion of the first partition wall for fluid communication between the two chambers, and an annular or cylindrical elastic oscillating plate disposed radially outwardly of the orifice passage so as to continuously extend in its circumferential direction while partially defining the pressure receiving chamber on one side thereof and an oscillating air chamber on the other side thereof. The elastic oscillating plate is oscillated to cause a periodic change of the fluid in the pressure-receiving chamber, by a periodic change of an air pressure which is applied to the oscillating air chamber, whereby the vibration-damping device exhibits an active damping effect with respect to the vibrations to be damped.
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