Abstract
Magnetic functional fluids whose base fluid is polyalphaolefin containing needle-like particles are prepared as new working fluids for damping force variable dampers. Damping force of the damper using the magnetic functional fluid is measured and it is shown the basic damping property. Viscosity of the fluid is also obtained by using the rheometer. When the total volume fraction of particles in the fluid is constant, larger volume fraction of needle-like magnetic particles in the suspended particles increases the damping force.
