Electronic Power Steering System: General
The electronic power steering (EPS) system includes the same components of conventional power steering system.
In addition, it has a solenoid valve on power steering gear box, and a control unit underneath the audio of the center fascia. To control the oil flow of steering gear box, a solenoid is provided and it functions by the current from control module which receives signals from VSS (Vehicle Speed Sensor) and TPS.
EPS performs the conventional power steering function in case a failure has occurred in the system. EPS electronically controls the current to the solenoid of by-pass valve by inputting sensor's signals to control the hydraulic amount in cylinder chamber and thereby varying the steering effort versus the hydraulic pressure according to vehicle speed.