ショックアブソーバの摩擦特性が及ぼす自動車の官能特性への影響

抄録

The friction of shock absorber affects the riding comfort and steering stability of vehicle. The friction behavior is very complex, because the lubricating state during the reciprocating sliding motion in the shock absorber changes every moment. Frictional parts such as hydraulic oil, guide bush, and piston band are used, and the relationship between the friction characteristics of shock absorber and vehicle sensory characteristics has been improved by using various combinations. However, the impact of frictional characteristics of shock absorbers on vehicles is not yet sufficiently elucidated. We proposed a system that separates the frictional parts with a sinusoidal waveform that is close to the operating conditions of shock absorber and measured dynamic friction characteristics with high precision changing amplitude and frequency. In addition, we proposed and digitized indices that evaluate the measured friction. Then, we analyzed the correlation between actual frictional characteristics and those digitized based on the result of sensory evaluation of actual vehicles.