Patent ID: 8684366

Claim:
A vehicle height adjustment device in a vehicle, comprising: a damper tube provided on one of a vehicle body side and an axle side; a piston rod that is provided on the other one of the vehicle body side and the axle side and that extends and retracts with respect to the damper tube by sliding in an oil chamber within the damper tube; a hydraulic jack that is provided on one side of the damper tube and the piston rod; a spring receiver that is supported on a plunger that is inserted in a jack chamber of the hydraulic jack; a suspension spring that is interposed between said spring receiver and a spring receiver that is provided on the other side of the damper tube and the piston rod; a hydraulic pump that supplies a working oil to the jack chamber of the hydraulic jack through a pumping operation resulting from extension and retraction of the piston rod with respect to the damper tube; and a switching valve for intake and discharge of the working oil, so as to implement switching for the working oil to the jack chamber of the hydraulic jack, such that a vehicle height is adjusted due to extension and retraction of the piston rod with respect to the damper tube, wherein the vehicle height adjustment device has means for predicting a vehicle stopping predicted time, and when the predicted vehicle stopping predicted time is not more than a predefined reference vehicle stopping time, implementing a vehicle height lowering control mode, and enabling a vehicle height lowering operation through switching of the switching valve.