BMW Motorrad G 650 X Challenge 2006, Руководство пользователя для мотоциклиста

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and adapts braking pressure
to the maximum transferrable
braking force, so the wheels
continue to turn and direc-
tional stability is maintained
irrespective of the condition of
the road surface.
What are the effects of
surface irregularities?
Humps and surface irregu-
larities can cause the wheels
to lose contact temporarily
with the road surface; if this
happens the braking force
that can be transmitted to
the road can drop to zero. If
the brakes are applied under
these circumstances the ABS
has to reduce braking force
to ensure that directional sta-
bility is maintained when the
wheels regain contact with
the road surface. At this in-
stant the BMW Motorrad ABS
must assume an extremely
low coefficient of friction, so
that the wheels will continue
to rotate under all imaginable
circumstances, because this
is the precondition for ensur-
ing directional stability. As
soon as is registers the actu-
al circumstances, the system
reacts instantly and adjusts
braking force accordingly to
achieve optimum braking.
How can stopping
distance be minimised?
Each time the brakes are
applied, a load distribution
shift takes place with the
load shifting forward from
the rear to the front wheel.
The sharper the motorcycle
decelerates, the more load
is shifted to the front wheel.
The higher the wheel load, the
more braking force can be
transmitted without the wheel
locking.
To optimise stopping dis-
tance, apply both the front
and rear brakes. Apply the
front brakes rapidly and keep
on increasing the force you
apply to the brake lever in or-
der to make full use of the dy-
namic load shift to the front
wheel. Remember to pull the
clutch at the same time. In
the "panic braking situations"
that are trained so frequently
braking force is applied as
rapidly as possible and with
the rider's full force applied
to the brake levers; under
these circumstances the dy-
namic shift in load distribution
cannot keep pace with the in-
crease in deceleration and the
tyres cannot transmit the full
braking force to the surface
of the road. ABS has to inter-
vene to keep the front wheel
from locking; this increases
stopping distance.
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