Principle of Operation

Servotronic provides speed dependent control of the power assisted steering. The flow of hydraulic oil is reduced (variable) by an electro-hydraulic pressure converter (solenoid valve) located on the steering rack. The degree of oil flow reduction is varied by the current supplied to the solenoid valve from the CIM control circuit.

In connection with EDC-K, the driver can influence the power assisted steering by choosing between two characteristic curves, comfort or sport. The comfort or sport request dictates the current supplied to the solenoid valve dependent on the vehicle speed.