Dynamic Engine Brake Control; Trol - BMW S 1000XR Rider's Manual

The system is not optimised for
8
special requirements that apply
under extreme competitive situ-
148
ations 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 re-
sponsibility for assessing road
and traffic conditions and ad-
opting his or her style of riding
accordingly.
Do not take risks that would
z
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.
With DTC, the speeds of
the front and rear wheels are
compared and the angle of heel
taken into account as one means
of detecting the rear wheel's
incipient tendency to spin or slip
sideways.
If the lean angle values are iden-
tified as implausible over an ex-
tended period of time, a substi-
tute value is used for the lean
angle or the DTC 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 con-
trol may switch off automatically
under the exceptional riding con-
ditions outlined below.
Exceptional riding
conditions:
Riding for a lengthy period with
the front wheel lifted off the
ground (wheelie).
Rear wheel rotating with the
vehicle held stationary by ap-
plying the front brake (burn-
out).
Heating up with the motorcycle
on an auxiliary stand, in neutral
or with a gear engaged.
Dynamic engine brake
control
How does dynamic engine
brake control work?
The purpose of dynamic en-
gine brake control is to prevent
the unstable riding states that
can be produced by excessive
engine braking moment acting
on the rear wheel. Depending
on the road condition and rid-
ing dynamic, excessive braking