摘要 |
PURPOSE:To reconcile lower noise inside a vehicle and security of control stability by varying the rigidity of the insulator of a strut upper mount device in the cross direction of a body, in response to running conditions. CONSTITUTION:The first fluid chamber 55 and the second fluid chamber 56 which communicate with each other via an orifice 53 are formed in an insulator 20 to fill therein viscocity variable fluid 77 which has higher viscocity according to an applied voltage. Zero voltage when lateral G is at preset value or less or voltage V when the lateral G exceeds the preset value is applied in the orifice through a lateral G sensor 102, a control unit 101 and a power supply 100. Then, fluid resistance is enhanced by vibration in the cross direction of a body at the upper part of a piston rod 1 when fluid staying in both fluid chambers 55, 56 passes through the orifice, and the rigidity of the insulator in the lateral direction of the body is enhanced. |