Dynamic Traction Control; Dtc - BMW S 1000 RR Rider's Manual

Dynamic Traction
8
Control (DTC)
148
How does traction control
work?
Traction control is available in
two versions
without provision for the bank
angle: Automatic Stability Con-
trol ASC
ASC is a rudimentary function
intended to prevent falls.
with provision for bank angle:
Dynamic Traction Control DTC
DTC controls more comfortably
and is suitable for improving lap
times on the race track.
z
The traction control system com-
pares the speed of rotation at
the circumferences of the front
wheel and the rear wheel. The
differential is used to compute
slip as a measure of the reserves
of stability available at the rear
wheel. If slip exceeds a certain
limit, the engine management
system intervenes and adapts
engine torque accordingly.
WARNING
Risky riding
Risk of accident despite ASC/

DTC

Invariably, it remains the rider's
responsibility to adapt riding
style to riding conditions.
Do not take risks that would
negate the additional safety
offered by this system.
Special situations
In accordance with the laws of
physics, the ability to accelerate
is restricted more and more as
the angle of heel increases. Con-
sequently, there can be a per-
ceptible reduction in acceleration
out of very tight bends.
The speeds of the front and rear
wheels are compared and DTC,
unlike ASC, also takes the bank
angle into account in processing
data to detect the rear wheel's
incipient tendency to spin or slip
sideways.
with Dynamic Traction Control

(DTC)

OE
If the electronic processor re-
ceives values for the bank angle
that it considers implausible over
a lengthy period, a dummy value
is used for the bank angle or the
DTC function is switched off.
Under these circumstances the
indicator for a DTC fault shows.
Self-diagnosis has to complete
before fault messages can be is-
sued.
The BMW Motorrad Traction
Control can shut down automat-
ically under the exceptional riding
conditions outlined below.