Patent ID: 6161844
Filing Date: 2000-12-19
Classification: B60G

Abstract:
A suspension device which controls the range of movement between a suspended point and a non-suspended point, comprising an elastic link mounted between said suspended and non-suspended points, said elastic link including a spring and a reversible electric jack acting parallel to the spring in order to control the movements between said suspended and non-suspended points, and means for controlling the electric jack so that, based on a variation in the distance between said suspended and non-suspended points caused by relative displacement of the suspended and non-suspended points, regardless of the direction of displacement, the electric jack first follows the direction of the deformation of the spring caused by a change in the contour of the road, while supplying the electric jack with electrical energy so that it develops a force oriented in the same direction as the direction of the deformation of the spring caused by said change in the contour of the road, and then the means for controlling the electric jack reduces said force developed by the electric jack so as to cancel out said force due to said variation in the distance within a predetermined relaxation time.