Magnetorheological fluid with the high yield stress in high shear rate is arranged to improve stability and reliability to include that the clutch having by height, a brake, an engine mounting etc. ratio occur about mechanism. Magnetorheological fluid is satisfied to following condition (1), (2), (3) and (4). Magnetorheological fluid includes a magnetic particle comprising carbonyl iron powder mixes the identical weight % to CM and HS. (1) 1 (micron)≤d10 3 (micron); (2) 3 d10 of (micron)=2 be in the cumulative distribution of granularity 10% almost maximum value granularity granularity. D50 is 50% granularity about the maximum particle size in cumulative distribution.
展开▼
