TVS Apache RTR 200 4V ABS Race Edition 2.0 Owner's Manual page 11

HECU HECU
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.
If the brakes are applied under these condition, the
ABS has to reduce the braking force to ensure and
maintain the directional stability when the wheels
regains its contact with the road surface. At this
instant the ABS must reduce the traction, so that the
wheels will continue to rotate under all imaginable
circumstances, because this is the precondition for
ensuring directional stability.
Wheel speed sensor Wheel speed sensor
As soon as the actual circumstances arises, the
system reacts instantly and adjusts braking force
accordingly to achieve optimum braking.
Why does brake pedal / lever pulsate during brake
application?
Vehicles fitted with ABS uses the conventional brake
system during normal operation. But during hard
stop the brake pedal / lever feels different, i.e., a
rapid pulsation in the brake pedal / lever; This is
absolutely normal.
It is not necessary to have this pulsation feel every
time the brake is applied. Pulsations are felt only
during wheel locking tendency, occurs due to the
modulation of pressure in the brake circuit by HECU.
Pulsation means that the vehicle is in limit. This
pulsation feel also depends on the road condition.
Rear wheel lift
Under very severe and sudden deceleration,
however, under certain circumstances it is possible
that the ABS unit fitted in your vehicle will be unable
to prevent the rear wheel from lifting clear of the
ground and flip over. Severe braking can cause the
rear wheel to lift off the ground.
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