| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of the noise of a high frequency component at the time of damping idling vibration. SOLUTION: An insulator 2 and a vibration control mechanism part 1 which is formed in series to the insulator 2 are formed between an upper part linking member 6 which is jointed to a vibrating body and a lower part linking member 9 which is jointed on a vehicle body side. The vibration control mechanism part 1 consists of a main chamber 12 which is filled with fluid, an auxiliary chamber 16 which is jointed to the main chamber 12 through the first orifice 15, an air chamber 18 formed below the auxiliary chamber 16, the third fluid chamber 123 which is jointed to the main chamber 12 through the second orifice 125, and a balancing chamber 13 which is partitioningly-formed against the third fluid chamber 123 through the second diaphragm 11. The second orifice 125 has a prescribed volume, and is formed so that the fluid in the second orifice 125 may resonate with the operation (vibration) of the balancing chamber 13 at the time of inputting idling vibration. A switching means 3 for leading-in negative pressure or atmospheric pressure to the balance chamber 13, and a control means 5 for operating the switching means 3 are provided. |
