Fluid-filled active vibration damping device

摘要

Disclosed is a fluid-filled active vibration damping device including: an elastic body; a primary fluid chamber partially defined by the elastic body; a movable member partially defining the primary fluid chamber on one side and a working air chamber on the other side; and a vacuum pump including an air intake port and an exhaust port, which are connectable to the working chamber via a valve mechanism. A fluid pressure variation in the primary fluid chamber can be actively controlled by transmitting an air pressure variation in the working air chamber to the primary fluid chamber via the movable member. A switching operation of the valve mechanism selectively applies a negative pressure generated in the air intake port and a positive pressure generated in the exhaust port to the working air chamber in order to generate the air pressure variation in the working air chamber.