| 摘要 |
PURPOSE:To simultaneously control the fluid pressures at both ends of fluid charge bushings to change over the spring constant of the fluid bushing device into more than two stages to obtain the spring constant in accordance with an operating condition, by disposing a change-over value in passages communicating fluid chambers in the fluid bushings. CONSTITUTION:Fluid charged bushings 11, 21 are composed of inner clyinders 12, 22 into which support pins are inserted, and outer cylinders 13, 23 which are secured to the front and rear ends of radial rods 13, 23, and fluid chambers 12, 16, 25, 26 which are partitioned by rubber walls 14, 24, are defined between the inner and outer cylinders. The front chambers 15, 25 are communicated with each other through a passage 5 while the rear chambers 16, 26 are communicated with each other through a passage 6, and further, there is provided a changeover valve 1 which opens and closes both passages 5, 6, simultaneously. This change-over valve 1 is changed over by means of solenoids 2, 3, that is, both passages 5, 6 are opened when one solenoid 2 is energized while both passages 5, 6 are closed when the other solenoid 3 is energized. |
