Traction Control (Asc/Dtc) - BMW Motorrad R 1250 R Rider's Manual

Evolution of ABS to ABS Pro
with ABS Pro
Until now, the BMW Motorrad
ABS helped ensure a very high
degree of safety for braking
with the motorcycle upright
and travelling in a straight line.
Now ABS Pro offers enhanced
safety for braking in corners
as well. ABS Pro prevents the
wheels from locking even un-
der sharp braking. ABS Pro re-
duces abrupt changes in steer-
ing force, particularly in panic-
braking situations, counteract-
ing the vehicle's otherwise nat-
ural but undesirable tendency
to straighten up.
ABS intervention
Technically speaking, depend-
ing on the riding situation
ABS Pro adapts ABS inter-
vention to the motorcycle's
bank angle. Signals for rate
of roll and rate of yaw and
lateral acceleration are used to
calculate bank angle.
As the motorcycle is heeled
over more and more as
it banks into a corner, an
increasingly strict limit is
imposed on the brake-pressure
gradient for the start of brake
application. This slows the
build-up of brake pressure to a
OE
corresponding degree. Addi-
tionally, pressure modulation is
more uniform across the range
of ABS intervention.
Advantages for the rider
The advantages of ABS Pro for
the rider are sensitive response
and high braking and direc-
tional stability combined with
best-case deceleration of the
motorcycle, even when corner-
ing.
TRACTION CONTROL (ASC/
DTC)
How does traction control
work?
Traction control is available in
two versions
without provision for the
bank angle: Automatic Sta-
bility Control ASC
ASC is a rudimentary function
intended to prevent falls.
with provision for bank angle:
Dynamic Traction Control
DTC
DTC regulation is more del-
icate and more comfortable
thanks to the additional bank
angle and acceleration inform-
ation.
Traction control compares the
front and rear wheel circum-
ferential velocities. The differ-
ential is used to compute slip
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