What does EPS mean on a sedan?

[StAlice]

EPS on a sedan stands for Electric Power Steering, also known as electronic power steering. Electric Power Steering is a power steering system that directly relies on an electric motor to provide auxiliary torque. It consists of components such as a torque sensor, vehicle speed sensor, electric motor, reduction mechanism, and electronic control unit (ECU). The working principle of the Electric Power Steering system is that the torque sensor is connected to the steering shaft. When the steering shaft rotates, the torque sensor starts working. The relative angular displacement generated between the input shaft and output shaft under the action of the torsion bar is converted into an electrical signal and transmitted to the ECU. The ECU determines the rotation direction of the electric motor and the magnitude of the assist current based on the signals from the vehicle speed sensor and torque sensor, thereby achieving real-time control of the power steering.