Does Electric Power Steering Require Steering Fluid?
1 Answers
Electric power steering requires steering fluid. Electric power steering is an EPS system, which is a power steering system that directly relies on an electric motor to provide auxiliary torque. The electric power steering system does not have the hydraulic pump, hydraulic pipelines, or steering column valve structure of a hydraulic power steering system. Instead, it directly transmits the assistance generated by the motor to the steering system through a reducer in a purely mechanical manner. The electric power steering system consists of a steering column, torque sensor, servo motor, and control module. Its working principle is as follows: after the vehicle starts, the system begins to operate. When the vehicle speed is below a certain threshold, the signal is sent to the control module, which then issues control commands to the servo motor based on data such as the steering wheel's torque, rotation direction, and vehicle speed. This causes the servo motor to output torque of a corresponding magnitude and direction to generate assistance. When no steering is performed, the electronic control unit does not send torque signals to the servo motor, and the current of the servo motor tends toward zero.