Operating Instructions

175
Heating up on the center
stand in neutral or with gear
engaged.
DYNAMIC ENGINE BRAKE
CONTROL
with riding modes Pro
OE
How does dynamic engine
brake control work?
The purpose of the dynamic
engine brake control is to
safely prevent unstable riding
conditions that are related to
excess drag torque at the rear
wheel. Depending on the road
condition and riding dynamics,
excess drag torque can make
the slip at the rear wheel
increase severely and impede
riding stability. The dynamic
engine brake control reduces
slip at the rear wheel to a safe,
setpoint slip that is dependent
on the mode.
Causes of excess slip at the
rear wheel:
Riding in coasting overrun on
a road with low coefficient of
friction (e.g. wet leaves).
Hopping when shifting gears
down.
Hard brake onset in sporty
riding style.
Like the BMW Motorrad DTC
traction control, the dynamic
engine brake control compares
the wheel centrifugal veloc-
ity of the front and rear wheel,
which are calculated from the
wheel RPM and the tire radius.
The dynamic engine brake con-
trol can determine the slip, and
therefore the stability reserve,
on the rear wheel using the
speed difference.
If the slip exceeds the respec-
tive limit value, the engine
torque is increased by slightly
opening the throttle valves. The
slip is reduced, and the vehicle
is stabilized.
Effect of the dynamic engine
brake control
In the ECO RAIN and ROAD
riding modes: maximum sta-
bility.
with riding modes Pro
OE
In the DYNAMIC riding mode:
Reduced intervention when
compared to the ECO, RAIN
and ROAD riding modes.
DISTANCE CONTROL (ACC)
with Active Cruise Control
OE
What is ACC?
BMW Motorrad ACC is adap-
tive cruise control with distance
control. The function enables
the rider to specify a desired
speed and desired distance
from the vehicle in front. This