| 摘要 |
PROBLEM TO BE SOLVED: To make a vibration transmitting characteristic changeable of an engine mount by using an inexpensive actuator and simplifying a constitution. SOLUTION: In a side member 15 connected with a mount rubber (vibration isolating rubber) 11 of an engine mount 4, a partitioning member 16 is inserted, a space to the mount rubber 11 is closed, an air chamber A is formed. In the side member 15, an air passage pipe 20 communicating with the air chamber A is connected, to be connected to a VSV(vacuum switching valve) 2 through a connection pipe 21. This VSV2 is on/off controlled to be based on drive voltage Vout from an ECU30 corresponding to explosion vibration of an engine, associated with vibration of the engine, an air pressure of the air chamber A is switched to a negative pressure of a negative pressure tank 3b accumulating a negative pressure of an intake manifold 3a or to the atmosphere. In this way, a vibration transmitting characteristic of the engine mount 4 is properly variably formed, vehicle vibration is markedly reduced. |
