Dynamic Traction Control (Dtc) - BMW R 1250 GS Adventure Rider's Manual

164 ENGINEERING DETAILS
DYNAMIC TRACTION CON-
TROL (DTC)
How does traction control
work?
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 cer-
tain limit, the electrical machine
management system intervenes
and adapts torque accordingly.
BMW Motorrad DTC is de-
signed as an assistant system
for the rider and for use on
public roads. The extent to
which the rider affects DTC
control can be considerable
(weight shifts when cornering,
items of luggage loose on the
vehicle), especially when the
style of riding takes rider and
machine close to the limits im-
posed by physics.
Activate ENDURO riding mode
for off-roading. This mode
delays DTC intervention slightly
in order to permit controlled
drifting.
The system is not optimised for
special requirements that ap-
ply under extreme competitive
conditions off-road or on the
track. The BMW Motorrad DTC
can be deactivated in these
cases.
WARNING
Risky riding
Risk of accident despite DTC
Invariably, the rider bears
responsibility for assessing
road and traffic conditions
and adopting his or her style
of riding accordingly.
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 acceler-
ate is restricted more and more
as the angle of heel increases.
Consequently, there can be a
perceptible reduction in accel-
eration out of very tight bends.
The speeds of the front and
rear wheels are compared and
the angle of heel taken into ac-
count as one means of detect-
ing the rear wheel's incipient
tendency to spin or slip side-
ways.