| 摘要 |
PURPOSE:To suitably suppress or isolate vibration of an engine in the all running condition of a vehicle, by enabling the moving distance of a movable separator plate, which is arranged between fluid chambers and can move in the direction of relaxing a difference of pressure between the both fluid chambers, to be controlled by an electromagnetic coil. CONSTITUTION:A vertically movable case 7 is arranged between the first fluid chamber A and the second fluid chamber B forming their chamber walls by elastic material walls 1, 2 of rubber in large thickness, and a movable separator plate 8 movable by a prescribed distance is provided inside the case 7 while the movement of said plate is controlled when an electromagnetic coil 5 acts to attract the case. When the electromagnetic coil 5 causes no attractive action, the movable separator plate 8 and the case 7 vertically move to prevent a change of internal pressure in each fluid chamber A, B. When the electromagnetic coil 5 performs the attractive action, the case 7 is attracted and the movement of the movable separator plate 8 is controlled to a small distance. Here when the change of the internal pressure in the fluid chambers A, B can not be prevented by the movement of the movable separator plate 8, vibration is damped by circulating fluid in the fluid chambers A, B through a throttling hole F provided in the movable separator plate 8. |
