| 摘要 |
PURPOSE: To provide a characteristic variable of a vibration isolating device while attaining miniaturization. CONSTITUTION: A main liquid chamber 32 and the first subliquid chamber 34 are connected by the first limiting passage 52, to connect the main liquid chamber 32 and the second subliquid chamber 70 by the second limiting circuit 46. The second air chamber 74 is provided to be opposed to the second subliquid chamber 70 through the second diaphragm 68. These second subliquid chamber 70, second diaphragm 68 second air chamber 74 are arranged in a partitioning member 30 partitioning between the main liquid chamber 32 and the first subliquid chamber 34. The second air chamber 74 is formed so that it can communicate with the atmosphere when a switching valve 82 is opened. When an engine is started, in the case that a vibration frequency rises above an idle vibration frequency, the switching valve 82 is closed to increase rigidity of the second diaphragm 68, so that a vibration of high frequency can be absorbed. |
