METHOD TO CONTROL AIR-PRESSURE OF TIRE OF THE IN-WHEEL ELECTRIC VEHICLE OF USING ACCELERATION SENSOR AND SYSTEM FOR THE SAME

摘要

The present invention relates to system and method for controlling air-pressure of tires while an in-wheel electric car is driving, using an acceleration sensor, more specifically to system and method for controlling air-pressure of each tire at real time during the driving by installing an acceleration sensor in the electric car. The method for controlling air-pressure comprises the steps of: measuring the acceleration of the driving electric car by using the acceleration sensor; calculating, by using the measured acceleration value, static normal reaction in stop state, dynamic normal reaction change generated during the driving; calculating air-pressure change in each tire during the driving, based on the calculated static normal reaction change and dynamic normal reaction change; and controlling the air-pressure of each tire by discharging or injecting the air, based on the calculated air pressure change. [Reference numerals] (AA) START; (BB) End; (S10) Measuring acceleration (a_x,a_y) of running electric vehicle; (S20) Measuring f_z,ΔF_Z,Δ_P_i of each tire; (S30) Controlling air pressure of each tire