Power steering, also known as power-assisted steering (PAS) or steering assist system in automobiles, helps drivers steer by augmenting steering effort of the steering wheel. The driver can provide less effort to turn the steered wheels when driving at typical speeds, because hydraulic or electric actuators add controlled energy to the steering mechanism. Hydraulic power steering systems for automobiles augment steering effort via an actuator, a hydraulic cylinder that is part of a servo system. Find more info about power steering in the video below!