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

GF46.50-P-2400TX SPS electrically controlled centering, function





Function
The electronic control of the speed-sensitive power steering is integrated in the ESP control unit (N47-5). A certain manual force (K) is set at the steering wheel according to the speed of the vehicle. As the vehicle speed increases the force of the hand (K) to be applied to the steering wheel increases (up to v = 100 km/h).

The vehicle speed determined by the ESP control unit is assigned to a specified current in a performance map. This current is then set in the SPS solenoid valve (Y10) (proportional solenoid valve) and influences the oil flow (hydraulic reaction) within the rack-and-pinion steering, and thus the manual force (K) required at the steering wheel.





The actuation of the SPS [PML] solenoid valve is pulsed. The current is regulated by pulse-width modulation of these pulses.