| 摘要 |
PURPOSE: A hydraulic active engine mounting apparatus is provided to damp vibration of each different frequency range from an engine according to the presence of an opening and shutting of an orifice passage and a liquid flow hole. CONSTITUTION: A hydraulic active engine mounting apparatus comprises a separation partition(50), a ductile membrane(60), and a pressure transmission unit(70) and a control unit(80). A damping chamber is divided into an upper chamber(U) and a lower chamber(L) by the separation partition. The ductile membrane mounted to the upper chamber varies its own volume depending on internal pressure variation. The pressure transmission unit transfers pressure inside the ductile membrane so that the ductile membrane can be deformed. The control unit controls the working of the pressure transmission unit according to the engine state. A main pipe(30) has an orifice passage(31) communicating the upper chamber and lower chamber. The orifice passage is opened and shut according to the deformation of the ductile membrane. The engine vibration of different frequency is attenuated according to the opening and shutting of the orifice passage.
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