Hydraulic Power Steering System Design in Road-Analysis, Testing and Enhanced Functionality. Mechanical Karpagam. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. A short summary of this paper. 20 Full PDFs related to this paper. Read Paper. Download Download PDF. ① Driver operates the steering wheel. ② The wheel steering power (hereinafter "steering torque") is received by the stub shaft. ③ The torque sensor detects the steering torque. ④ Torque signal is sent to the ECU Note 2). ⑤ ECU supplies power to the assist motor according to the torque signal. ⑥ The reduction gear augments the torque Abstract and Figures. Electric Power Steering (EPS) is a full electric system, which reduces the amount of steering effort by directly applying the output from an electric motor to the steering In automobiles, power steering (also known as power assisted steering (PAS) or steering assist system) helps drivers steer by augmenting steering effort of the steering wheel. Hydraulic or electric actuators add controlled energy to the steering mechanism, so the driver needs to provide only modest effort regardless of conditions. Electric Power Assisted Steering (E.P.A.S.) System Electric Power Steering (EPAS) has replaced hydraulic power steering in many new vehicles today. One of the advantages of electric power steering is that it eliminates the power steering pump, which can use as much as 8 to 10 horsepower under load.