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Most automobiles are steered (turned) by turning the front wheels, but some (not many) have all wheel steering. Most steering systems link the front wheels together by means of a tie-rod. The tie-rod ensures that the turning of one wheel is identical to the corresponding turn in the other.
When the steering wheel is turned, the action rotates a steering shaft inside the steering column. Depending on the steering mechanism, gears or other devices convert the rotating action of th esteering wheel into a horizontal force that turns the wheels.
Manual steering is done only by the force exerted by the driver to turn the wheels. Conventional power steering uses hydraulic pressure, operated by the pressure or movement of a liquid, to augment that force, creating the need for less effort to be exerted by the driver. Electric power steering uses an electric motor instead of hydraulic pressure. |
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