GF46.50-P-2400SK SPS Electrically Controlled Centering, Function

GF46.50-P-2400SK SPS electrically controlled centering, function
- with CODE (213) Speed-sensitive power steering


The electronic control system of the speed-sensitive power steering is integrated in the ESP and BAS control unit (N47-5). A certain manual force is set at the steering wheel according to the speed of the vehicle. As the speed of the vehicle increases, the manual effort required to turn the steering increases at the steering wheel (up to 100 km/h).

The driving speed calculated by the ESP and BAS control unit (N47-5) is assigned a nominal current in a characteristic map. This current is then set in the SPS solenoid valve (Y10) and influences the oil flow (hydraulic reaction) within the rack-and-pinion steering, and thus the manual force required on the steering wheel. Actuation of the SPS solenoid valve (Y10) is pulsed. The current is regulated by pulse-width modulation of these pulses.