ELECTRONICALLY CONTROLLED SUSPENSION MAKING USE OF REVERSE-TYPE DAMPERS, REDUCING PRODUCTION COST OF VEHICLE BY SECURING PERFORMANCE OF VEHICLE WHILE REDUCING NUMBER OF VERTICAL ACCELERATION SENSORS

摘要

PURPOSE: An electronically controlled suspension making use of reverse-type dampers is provided to calculate the right and left vertical speed of front and rear wheels via the vertical speed detected from a vertical acceleration sensor and a road surface state and to change damping force modes of the dampers via damping force control values of the dampers output by speed values corresponding to right and left acceleration. CONSTITUTION: An electronically controlled suspension making use of reverse-type dampers comprises a vertical accelerations sensor(100) installed in the middle of front wheels, to detect the vertical acceleration of vehicle wheels; a road surface decision part(115) detecting road surface state information correspondently to the vertical acceleration; a front wheel-vertical speed calculation part(110) calculating right and left vertical speed elements of front wheels correspondently to the vertical acceleration; a rear wheel-vertical speed estimation part(120) changing the phase and volume of the right and left vertical speed elements of the front wheels on the basis of the road surface state information and detecting right and left vertical speed elements of rear wheels; a control logic part(130) calculating control values for controlling the damping force of the dampers correspondently to the right and left vertical speed elements of front and rear wheels; and a damper control circuit(140) deciding the damping force given to the dampers of the vehicle wheels correspondently to the control values.