CONTROL METHOD FOR REAR WHEEL STEERING

PURPOSE: A rear wheel steering control method of a vehicle is provided to prevent collision with a side obstacle in low speed driving and to prevent damage of the vehicle by reducing a rotation radius of the vehicle. CONSTITUTION: An ECU(Electronic Control Unit) determines whether a driving speed of a vehicle exceeds 0 km/h or not(S12). A moving distance of the vehicle is calculated from the time in which the vehicle speed exceeds 0km/h(S13). A rear wheel steering angle is controlled as 0° until the moving distance of the vehicle is same to a total length of the vehicle(S15). The rear wheel steering angle of the vehicle is reversely controlled on a front wheel steering angle by the ECU when the moving distance of the vehicle exceeds the total length of the vehicle(S16). [Reference numerals] (AA) Start; (S11) Gearshift position = Straight; (S12) Vehicle speed > 0; (S13) Calculate a moving distance; (S14) Moving distance > Total length; (S15) Rear wheel steering angle = 0; (S16) Reverse control of a rear wheel steering angle; (S17) Front wheel steering angle = 0; (S18) Reset the moving distance to 0; (S19) Vehicle speed = 0; (S20) Rear wheel steering angle = 0; (S21) Vehicle speed > 50; (S22) Rear wheel same-phase control mode