System for preventing lane deviation of vehicle and control method thereof

A method for preventing lane deviation of a vehicle comprising:

• initializing variables and functions of a main ECU;
• checking information of a lane marker ECU and transmitting the information to an input data processor for processing of the information;
• determining driver intent to discontinue lane deviation prevention and determining whether lane deviation control can be performed;
• performing fail-safe control to determine whether a system for preventing lane deviation is malfunctioning in the case where there is no driver intent to discontinue lane deviation control and the vehicle is traveling in an area such that lane deviation control can be performed;
• determining if the vehicle is deviating from the lane based on information converted in an input data processor to suit an algorithm, in the case where it is determined that the system is operating normally;
• calculating an amount of steering control suitable to lane deviation conditions to generate a steering angle profile, in the case where it is determined that the vehicle is undergoing lane deviation;
• calculating a steering angle to return the vehicle to a center of the lane;
• and
• transmitting steering control data and steering angle data to an EPS system to realize steering control.