| 摘要 |
PROBLEM TO BE SOLVED: To restrain vibration generated at a vibrating body from being transmitted to the inside of a cabin more completely. SOLUTION: An engine mount 3 is provided with a linking metal fitting 11 fitted to an engine, a holder 12 fitted on a vehicle body side, an insulator 13 which is formed between the linking metal fitting 11 and the holder 12 and used mainly to absorb vibration transmitted from the engine, and a vibration control mechanism part 14 which is formed continuously to the insulator 13. The vibration control mechanism part 14 is provided with a main fluid chamber 15, an orifice 16, an auxiliary fluid chamber 17, a balance chamber 19, an air chamber 21 and so on. Negative pressure and atmospheric pressure are led into the balance chamber 19 alternately by ON/OFF-switching VSV 31. An expanded chamber 51 whose diameter is larger than that of an atmospheric pressure pipe passage 36 is formed on the way of the passage 36, and a length L2 between the balance chamber 19 and the expanded chamber 51 satisfies an expression: 0.85cT/4<=L2<=1.15cT/4. |
