| 摘要 |
PROBLEM TO BE SOLVED: To effectively reduce booming noise, accelerating time noise and good road travel vibration of low frequency as well as engine shaking and idle vibration. SOLUTION: A fluid-filled vibration control device is provided with a first and a second main chambers 18, 30 and a first and a second auxiliary chambers 19, 20. The first main chamber 18 and the second main chamber 30 are partitioned by an elastic film unit 35 with a nonlinear characteristic with spring load rapidly increased at the time of input of vibration of specified amplitude or more. The first main chamber 18 and the first auxiliary chamber 19 are communicated by a first orifice 27. The second main chamber 30 and the first auxiliary chamber 19 are communicated by a second orifice 28. The second main chamber 30 and the second auxiliary chamber 20 are communicated by a third orifice 29. At the time of large amplitude, the elastic film unit 35 regulates flow between the first and second main chambers 18, 30. Resonance frequency of a resonant system at the time of large amplitude vibration is set to an engine shaking area. Resonance frequency of three resonant systems at the time of small amplitude vibration are respectively set to a good road travel vibration area, an idle vibration area and a booming noise - accelerating time noise area. |
