| 摘要 |
PROBLEM TO BE SOLVED: To increase expanded elasticity of an elastic body to effectively control engine roll due to vibration input during the starting of an engine by interrupting the mutaually communicated state of a main liquid chamber and a sub-liquid chamber through a shock orifice and an idle orifice. SOLUTION: During the starting of an engine, a negative pressure actuator 20 moves a selector valve 16 to the position where a first valve body 161 is in close contact with the upper face of a partition plate 15 to close both a shock orifice 3 and an idle orifice 4. When low-frequency vibration having large amplitude at the time of starting the engine is inputted under this condition, a sealing liquid cannot move between a main liquid chamber 1 and a sub-liquid chamber 2, and expanded elasticity of an elastic body 13 is increased to restrict the vertical, relative displacement between a main body case 11 and a boss 12. Engine roll can thus be efficiently controlled. |
