PURPOSE: To provide an oscillation input estimation device for a suspension which estimates road oscillation input with high precision regardless of the vibration of the car body by providing an adder which adds a stroke speed calculated by a differential means to the vertical acceleration speed of a car body calculated by an integral means to compute an estimated value of oscillational input.
CONSTITUTION: Stroke detection means 27FL, 27FR detect the stroke of a suspension, and differential means 41a, 41b differentiate the detected stroke detection values to calculate a stroke speed. Car body vertical acceleration detection means 41c, 41d detect the vertical acceleration of the car body, and an integral means 41c, 41d integrates the detected vertical acceleration detection values to compute the vertical speed of the car body. Adders 41e, 41f then add the calculated values of the differential means 41c, 41d and the integral means 41c, 41d to compute an oscillation input estimation value. This constitution allows road oscillation input to be estimated with high precision regardless of the vibration of the car body.
TOHATA HIDEO
FUKUYAMA KENSUKE
AKATSU YOSUKE
