Abstract
The conventional vehicle suspension consisted of damper and coil spring is replaced by a colloidal cylinder, which accommodates a colloidal solution obtained as a mixture of lyophobic nano-porous silica gel powder and water due to the action of the surface tension. Firstly, the ride comfort was investigated by a single degree-of-freedom suspension bench device, and analyzed basic characteristics "stroke-load" by the single bench device. Then, the ride comfort and the rolling attitude were experimentally evaluated from random excitation and travel tests on a passenger car. A through comparison between the performances of conventional suspension and the proposed colloidal cylinder was performed.