System functions: Servotronic
The Servotronic, the electronic control of the speed-dependent steering servo is integrated in the system (encoding data record, as optional equipment). The EPS control unit determines the required steering servo assistance from various input variables.
| Item | Explanation |
|---|---|
| 1 | Steering servo torque |
| 2 | Driving speed |
| 3 | Steering torque applied by driver |
Characteristic maps for the support and damping characteristics are stored in the control unit. The values calculated from the input parameters combine with the characteristic curve to produce the required level of steering servo assistance. The servomotor and reduction gear provide the steering servo assistance. Important input variables for steering servo assistance are:
- Driving speed
- Steering torque on the driver side via steering torque sensor
- Current vehicle voltage
- Operating temperature