| 摘要 |
PURPOSE:To regulate engine vibration by forming a fluid chamber in wall section of a rubber member, charging magnetic fluid in the fluid chamber, providing an electromagnetic coil for generating a magnetic field in the fluid chamber, and varying the dynamic spring constant of the rubber member. CONSTITUTION:Fluid is charged in a main-chamber 33 and sub-chamber 34 which are communicated to each other through an orifice. The upper end of the main-chamber 33 is clogged by a thick rubber member 13. In the wall member of the rubber member 13, a fluid chamber 20 is provided. In the fluid chamber 20, magnetic fluid 50, whose viscosity changes according to the strength of a magnetic field, is enclosed. A bobbin member 22 is secured to the peripheral section of the fluid chamber. Around this bobbin member 22, a coil 21 for forming a magnetic field in the fluid chamber 20 in a nearly vertical direction. The dynamic spring constant of the rubber member 13 is adjusted through the magnetic coil 21. Thus, the vibration of an engine can be regulated. |
