Steering-torque sensor
The steering torque sensor digitally senses the steering torque applied by the driver. The working area is approx. 3 steering wheel turns from limit position to limit position.
| Item | Explanation |
|---|---|
| 1 | Pinion with torsion bar |
| 2 | Steering-torque sensor |
| 3 | Plug connection to EPS control unit, six-pin (2 pins used) |
The steering torque causes the torsion bar to twist. The torsion bar then transfers the steering torque to the pinion. The function of the steering-torque sensor is based on the magneto-resistive principle. This utilizes the effect that arises in response to changes in the magnetic field and changes in resistance. Different voltage signals are generated by these magneto-resistive elements and these are then forwarded to the EPS control unit. The EPS control unit uses this information to calculate the assistance torque required.