2014 - Mazda6 - Steering

TORQUE SENSOR

Purpose/ Function

• The torque sensor detects the steering torque and the steering direction, and outputs the signal to the Electric Power Steering (EPS) control module (CM).

Construction, Operation

• The non-contact type torque sensor is installed to the top of the steering column and consists of the following parts.

• Torsion bar: Connects the input shaft and output shaft.

• Input shaft: When the steering torque is input, the magnetic field is changed.

• Output shaft: Torque from the EPS motor is transmitted to the intermediate shaft.

• Coil: Assembled onto each shaft, converts magnetic field of input shaft to an electric signal.

• Electric circuit board: Sends the coil electric signal to the EPS CM.

  

Operation

• When the steering wheel is operated, the torsion bar connecting the input and output shafts twists.

• From the twisting of the torsion bar, the input and output shafts move relative to each other.As a result, the positions of the input shaft window and output shaft projection change, and the electric field is changed.

• The coil converts the change in electric field to an electric signal and the electric circuit board outputs it to the EPS CM.

• The EPS CM calculates the electric signal from this torque sensor internally and uses it for various controls as a steering torque signal.

Fail-safe