ABS anti-lock braking system
The anti-lock braking system (ABS) can prevent
wheels from becoming locked when the brakes are
applied. This will ensure vehicle controllability and
directional stability at the time of braking.
The main role of the ABS is to improve the active
safety of driving. The ABS will automatically adjust
the braking pressure on each wheel. Before the
wheels are about to be locked, the braking pressure
automatically decreases. Then, it is increased until the
wheels are locked. The electrical components of the
braking system receive a signal from the wheel speed
sensor. This signal accurately contains the time when
the wheels are about to roll on. Such information is
continuously processed so as to accurately adjust the
braking pressure. The brake pressure can be adjusted
up to 12 times per second, but it cannot be expected
that the ABS system can reduce braking distance in
all cases. For example, on a gravel road or on a slick
road that has just snowed, the braking distance may
be longer even if you drive slowly and carefully.
Working mode of ABS anti-lock
braking system
When the speed reaches about 20 km/h, an automatic
testing is started. At this time, the operating sound of
the pump can be heard.
ABS does not reduce the braking distance on gravel
or icy roads, but it retains some turning control as the
wheel does not lock up completely.
When ABS is working, it is normal to hear click
sound. If the speed range of a wheel is too low over
the speed of the vehicle and the wheel has a tendency
of locking, the ABS will reduce the braking pressure
on this wheel. This adjustment process can be noticed
through the noise of the brake pedal. As driver, you
should then know that the wheel is to be locked
(ABS’s adjustment range). At this time, you need to
continue to keep the brake pedal fully depressed and
steer the vehicle out of danger.
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