BMW Motorrad R 1250 GS 2002, Rider'S Manual, Page: 166 / 338

160 ENGINEERING DETAILS
DYNAMIC ENGINE BRAKE
CONTROL (MSR)
with riding modes Pro
OE
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 excess-
ive engine braking moment
acting on the rear wheel. De-
pending on the road condition
and riding dynamic, excessive
braking torque can produce
a sharp rise in rear-wheel slip
and impair directional stability.
Dynamic engine brake control
limits this slip at the rear wheel
to a safe mode-dependent and
bank-angle-dependent regu-
lated slip.
Causes for excessive slip at
the rear wheel:
Riding with engine overrun
on a surface with a low coef-
ficient of friction (e.g. wet
leaves).
Rear-wheel hop when rider
downshifts.
Sharp braking during sporty
riding.
In the same way as DTC trac-
tion control, dynamic engine
brake control compares the
wheel circumferential velocities
of the front and rear wheels.
Additional information on the
bank angle enables dynamic
engine brake control to calcu-
late slip and the reserve of sta-
bility at the rear wheel.
If slip overshoots the applic-
able limit, the throttle valves are
opened very slightly to increase
engine torque. Slip is reduced
and the vehicle is stabilised.
Effect of dynamic engine
brake control
In ECO, RAIN and ROAD rid-
ing modes: maximum stabil-
ity.
In the DYNAMIC and
DYNAMIC PRO riding modes:
high stability.
In ENDURO riding mode:
minimum stability.
In ENDURO PRO riding mode,
dynamic engine brake control
is inactive.
DYNAMIC ESA
with Dynamic ESA OE
Riding position equaliser
Dynamic ESA is an electronic
system that enables your mo-
torcycle's suspension to adjust
automatically to suit the load
the vehicle is carrying. When
spring preload is set to
Auto
,
the rider does not have to ad-