What is the working principle of the car power steering system?

[StRylee]

Here is the working principle of the car power steering system: 1. The torque sensor is connected to the steering shaft, and when the steering shaft rotates, the torque sensor starts working. 2. The relative angular displacement between the input shaft and output shaft caused by the torsion bar is converted into an electrical signal and transmitted to the ECU. The ECU determines the rotation direction of the motor and the magnitude of the assist current based on signals from the vehicle speed sensor and torque sensor, thereby achieving real-time control of power steering. 3. It can easily provide different assist effects from the motor at different vehicle speeds, ensuring light and flexible steering at low speeds and stable and reliable steering at high speeds.