BMW Motorrad S 1000 R 2020, Rider'S Manual

Page: 167 / 286

161
How does dynamic engine
brake control work?
with riding modes Pro OE
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 limits slip
at the rear wheel to a safe,
setpoint slip that is dependent
on the mode and angle.
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 DTC traction control,
the dynamic engine brake con-
trol compares the wheel cir-
cumferential velocities of the
front and rear wheel. With the
aid of more information on
the angle, the dynamic engine
brake control can determine
the slip or the stability reserve
at the rear wheel.
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 RAIN and ROAD riding
modes: maximum stability.
In the DYNAMIC and
DYNAMIC PRO riding modes:
high stability.
Additionally in the
DYNAMIC PRO riding mode:
maximum performance.
Stability may be impaired on
poorly surfaced roads or if
using unsuitable tires.
DYNAMIC DAMPING CON-
TROL (DDC)
How does DDC work?
with Dynamic Damping Con-
trol (DDC) OE
Dynamic Damping Control
(DDC) is a semi-active chassis
and suspension system that
automatically responds to
riding maneuvers and to the
road condition. Using a ride
height sensor, DDC detects
movements of the chassis