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hand, the controller provides electrical signal to steering motor to control steer wheels to
rotate according to steering wheel operation. It can ensure light and flexible steering at
low speed and stable and reliable steering at high speed.
3.3 Composition of Steering System
(1) Control mechanism of steering
Figure 3-1 Steering unit
The steering control mechanism of the truck is mainly composed of steering wheel,
steering column, coupling shaft, torque feedback device and mounting bracket (as shown
in Figure 3-1). They are fixed on the dashboard by mounting bracket, the steering wheel,
steering column and coupling shaft are connected together, the steering unit is fixed at the
lower end of the coupling shaft, and the rotation of steering wheel will drive the rotation
of steering unit. The steering wheel can be adjusted to the comfortable position by
adjusting the handle.
(2) Torque feedback device
The TFD provides input signals to the controller to control the speed and angle output of
the steering motor. The device can continuously provide variable torque output, making it
easier for operators to adapt to the electric steering system (see electrical system for
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