Apparatus and method for controlling suspension of vehicle

A method for controlling a suspension of a vehicle, the method comprising:

• obtaining, by a sensor, information about a road surface ahead of the vehicle during travel of the vehicle;
• deriving, by a controller, a height value of the road surface from the obtained information about the road surface;
• determining, by the controller, a state of the road surface based on a differential value of the derived height value, wherein the state of the road surface is determined as at least one of an uphill road, a downhill road, or a corrugated road;
• setting a point at which the derived height value of the road surface exceeds a first reference height value and the differential value of the derived height value of the road surface exceeds a first reference differential value as a determination start time point;
• setting a point at which the derived height value of the road surface exceeds a second reference height value and the differential value of the derived height value of the road surface exceeds the first reference differential value as a determination confirmation time point;
• in response to determining that a distance between the determination start time point and the determination confirmation time point is within a reference distance, determining the road surface as the uphill road, wherein the reference distance is increased or decreased in proportion to a speed of the vehicle;
• in response to determining that the distance between the determination start time point and the determination confirmation time point exceeds the reference distance, determining the road surface as the corrugated road;
• predicting, by the controller, a vehicle behavior corresponding to the determined state of the road surface;
• and
• controlling, by the controller, a damping force of the suspension based on the predicted vehicle behavior.