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ANTI-LOCK BRAKE SYSTEM
The slipping wheels on a riding surface results in
losing control of whole motorcycle which usually
occurs in fractions of a second. Restoring traction
while keeping the bike balanced is only a result of luck,
or extreme training, as is the case of professional
stunt riders who drift. Preventing the wheels from
slipping due to excessive braking force compensates
losing control and help the rider to maneuver the
vehicle and to avoid accidents.
So what the ABS does is actually limiting the braking
force exerted by the rider by either squeezing the
lever or pressing the brake pedal and keep the wheel
spinning. Once the imminence of the locking (and
therefore skidding) is avoided, the system re-applies
the maximum braking force until the next skid is
anticipated.
By limiting the max force of the braking maneuver, the
ABS systems practically allow riders to use the
greatest stopping force possible without locking the
wheels.
How does the ABS understands the wheel
locking?
The ABS uses continuous wheel speed monitoring
system; wheel speed sensors and toner rings and a
Hydraulic Electronic Control Unit (HECU).
Toner ring
During normal operation the ABS works similar to a
normal brake, but functions only when the wheel
tends to lock up. The speed sensors fitted on both the
wheels measures the rotational speed of the wheel,
when the wheel speed reduces rapidly i.e. wheel
tends to lock, the HECU modulates the pressure in the
brake circuit and thereby prevents the wheel from
locking.
How the irregular road surface affects the
braking?
Humps and irregular surfaces of the road can cause
the wheels to lose contact temporarily with the road
surface; if this happens the braking force that can be
transmitted to road surface is zero.
Wheel speed sensor
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