BMW R nineT 2020, Rider'S Manual

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102 ENGINEERING DETAILS
back to the rider's requested
level.
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
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.
BMW Motorrad ASC/DTC is
designed as an assistant sys-
tem for the rider and for use
on public roads. The extent to
which the rider affects ASC/
DTC control can be consider-
able (weight shifts when cor-
nering, items of luggage loose
on the motorcycle), especially
when the style of riding takes
rider and machine close to the
limits imposed by physics.
The system is not optimised
for special requirements that
apply under extreme compet-
itive conditions off-road or on
the track. The BMW Motorrad
ASC/DTC can be deactivated in
these cases.
WARNING
Risky riding
Risk of accident despite ASC/
DTC
Invariably, it remains the
rider's responsibility to ad-
apt 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.
Consequently, there can be a
perceptible lag in acceleration
out of very tight bends