The steering system includes a steering wheel, a steering column, steering
gears, rods and levers. There are two types of steering mechanisms: rack
and pinion type and pitman arm type. In the rack and pinion steering system,
when turning the steering wheel, the pinion rotates and moves the rack
from side to side, which then moves the front wheels. In the pitman arm
system, a pivoting arm is used to move the front wheels. While the rack
and pinion system is simpler, the pitman arm system can reduce the vibration
from road to the steering wheel. Therefore, the rack and pinion steering
system is desirable for small cars while the pitman arm steering system
is often used on large cars.
Power steering uses a hydraulic mechanism to move the steering linkage,
which makes it easier to turn the steering wheel.