Electromechanical Power Steering (EPS) (Ver. 2): Notes
The electromechanical power steering (EPS) differs from conventional hydraulic steering in that it has steering servo. The EPS supports the driver using an electrical servomotor instead of a hydraulic electric motor. The servomotor is only active when the vehicle is being steered. This means that the servomotor consumes no power during straight-ahead driving.
Electromechanical power steering offers the following advantages:
- lower steering forces on parking
- integrated, driving-speed-dependent steering servo (Servotronic)
- lower bumpiness when cornering as well as lower steering wheel vibrations
- active steering wheel return
- saves up to 0.3 l of fuel per 100 km, thus reducing CO2 emissions
- no hydraulic fluid necessary
The electromechanical power steering is available in the following equipment specifications:
- electromechanical power steering (EPS): voltage supply with 12 V (as before)
- electromechanical power steering (EPS) with Integral Active Steering (AL) and a defined combination of engine and transmission: Voltage supply with 12 V via jump start terminal point in engine compartment
- Electromechanical power steering (EPS) with Integral Active Steering (AL) and a defined combination of engine and transmission (weight on front axle): Voltage supply with 24 V via auxiliary battery, cut-off relay and charging controller for auxiliary battery with DC/DC converter
Shown here: electromechanical power steering with active steering
| Item | Explanation |
|---|---|
| 1 | Steering box |
| 2 | Steering-torque sensor |
| 3 | EPS control unit |
| 4 | Servomotor with integrated rotor position sensor |
| 5 | EPS unit |