Semi-active vehicle suspension control system with variable damping

摘要

Suspension characteristics are adjusted between hard and soft for bounding and rebounding stroke independently of each other. Sensor means monitors vertical speed of a vehicular body as a sprung mass relative to a wheel for producing a vehicle body speed indicative signal variable of signal polarity depending upon the direction of vibration, and sensor means for monitoring vertical acceleration of the vehicular body which is also variable of signal polarity depending upon direction. A control unit adjusts damping characteristics for bounding and rebounding vibration depending on the phase relationship between the signals. An adjustable damper 20 which may be used has a "bounding" fluid flow path 22h and a "rebounding" flow path 22m. A rotary actuating rod 27 controls a rotary valve member 26 having radial orifices to vary the damping. IMAGE