The chances are your car has Rack and pinion steering. It’s been an incredibly popular engineering choice for years, but have you ever stopped to ponder exactly how it works?
Thankfully, the basics aren’t hard to grasp at all: it’s all about turning rotational motion into linear. When you turn the steering wheel, this turns a steering column, which rotates the attached steering shaft and a worm gear known as the pinion. This gear sits on the ‘rack’, a length of metal with a series of teeth cut into it. So as the pinion rotates, the rack moves either left or right, depending on your steering input.
Source : CarThrottle
