What is the function of a torque sensor?

[MollyRose]

The function of a torque sensor is to measure the torque transmitted between the steering wheel and the output shaft of the steering gear, and convert the torque magnitude into a voltage signal sent to the ECU. It is a crucial determining factor in adjusting the magnitude of power steering assistance. Therefore, the quality of its output signal will simultaneously affect the vehicle's handling safety, especially during high-speed driving. The torque sensor is an important electronic control component in the electric power steering system. Its principle is equivalent to a potentiometer, with two input terminals connected to the VCC and GND ports of the electronic control unit (ECU) through wiring, applying 5V and 0V respectively. The two output terminals of the torque sensor, namely the main torque IN+ and the auxiliary torque IN-, are connected to the ECU through wiring.