| 摘要 |
PURPOSE:To obtain a vibration isolation function suitable to both a low-frequency vibration and a high-frequency vibration. CONSTITUTION:A holding elastic body 8 is placed between an inner tube 5 fixed to a power unit side and an outer tube 7 fixed to a car body side, and a part of a partition wall to partition a main fluid chamber 10 composed in parallel to the holding elastic body 8 is composed of a diaphragm 20. And the diaphragm 20 and a bracket 4 fixed to the power unit side have been connected through an attenuator 25 which is made into a free condition when a low-frequency vibration is input, and into a sticking condition when a high-frequency vibration is input. When a high-frequency vibration is input, the diaphragm 20 is vibrated securely synchronously to the vibration of the power unit side, and thereby, the capacity variation of the main fluid chamber 10 is moderated even though orifices 13 and 14 are in a sticking condition, and an increase of a moving spring constant is suppressed. |
