| 摘要 |
The stiffness of a vehicular suspension system is selected in accordance with vehicle speed and the rate of steering adjustment, which influence the centrifugal force on a turning vehicle. Shock absorbers in the suspension system can be operated in either high or low damping force modes. Vehicle speed and steering wheel position are monitored, and the latter property is checked periodically to derive a value of steering wheel acceleration. When steering wheel acceleration, i.e. the second derivative of the steering angle with respect to time, exceeds a threshold value, then shock absorbers are operated in the high damping force mode; otherwise, they operate in the low damping force mode. The threshold value to which the steering wheel acceleration value is compared is derived as a function of vehicle speed. Pivotable, rectangular-cross-section torsion bars or other selectable-stiffness suspension elements may be used in place of the shock absorbers. |
