Power steering is hydraulic equipment to lighten the steering system. Working steering system which uses this power steering mechanism based on a combination of hydraulic and mechanical. Both work together to produce a lightweight steering rotation.
To add to the comfort of driving, most modern cars use a tire width and low pressure, which is able to increase the surface contact area of ​​the wheel-to-road. As a result, the necessary power steering becomes heavier.
Power steering can be lowered by lowering the gear ratio steering gear. However, this will cause the steering wheel rotary motion into more when the vehicle turns, so there may be a sharp turn. Thus, to maintain steering agility and, at the same time makes power steering remains light, required some sort of steering tools. In other words, power steering, which has been widely used for large vehicles, are now also widely used for small passenger cars.