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Annex II ABS Basics
Will the braking distance be shortened when equipped with ABS?
† The testing data show that the braking distance will be shortened on most road
conditions (approximately 5%~20%). However, under some special road conditions
(such as snowy road, non-asphalt road and rough road), the braking distance will be
lengthened. However, the steering stability can be guaranteed.
What’s the main objective of ABS?
† The main objective of ABS is to prevent the wheels to be locked, which has following
effects:
① Maintain the vehicle stability on roads during the braking
② Capable of controlling the vehicle driving direction during braking in order to avoid the
occurrence of the collision.
③ Maintain the best braking pressure, disregarding the driving skills of the driver.
Why is the ABS warming lamp illuminated?
† After the driver starts the vehicle, the warning lamp will be off when the automatic
diagnosis of ABS ECU shows no trouble. If the warning lamp is illuminated during
driving or the warning lamp is always on, it indicates the trouble of ABS. Please drive
your vehicle to the designated service station for checking of ABS as soon as possible.
However, when the warning lamp is illuminated that indicates the ABS trouble, the
brake system still has the basic braking capability.
Will there be free of accident when equipped with ABS?
† ABS is the one device capable of increasing the driving safety, rather than the device
used to avoid the accidents arising from the driving mistake or variation of traffic
conditions. Therefore, insist on the safe driving all along rather than the excessive
reliance on the ABS.
The vehicle will lean to one side during braking on the one-side-slippery road, is this
phenomenon caused by ABS?
† This phenomenon is resulted from the different friction coefficients between the left
and right wheels on the roads. Under such condition, the ABS will exert the special
effects on the stability of the vehicle body. However, even under such condition, make
sure to operate the steering wheel with car in order to avoid the occurrence of accidents.
The vehicle will present the slippery phenomenon before braking during the turning on the
slippery road, will the ABS function effectively when the brake pedal is depressed at that time?
† The ABS will function effectively to provide certain help depending on the vehicle
speed. However, under most conditions, the outward cornering force is really big due
to the vehicle inertia and therefore the body correction will have limit even the ABS is
functioning.
† Generally, the tires will be applied with two kinds of forces during cornering: One is
the force required by driving and braking; another is the force required for vehicle
steering and stability maintaining. In fact, the driving, braking and steering of the
vehicle are completed though the coordination of above two forces and the two forces
are in reverse ratio. Therefore, during the braking at cornering, the braking force will
be increased and the force required for steering and stability maintaining will be
reduced. The vehicles equipped with ABS will best coordinate these two forces. For the
vehicles without the ABS, the steering performance and the stability are really weak as
these two forces are not in good coordination.
† However, under the condition that the above two forces are really small (such as: off-
tracking due to excessive speed during the vehicle skid), the force for body correction
is really small. Therefore, the ABS will not exert the effects. In conclusion,
deceleration in advance and safe cornering is the best method.
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