Engine management
with BMW Motorrad
ASC
How does ASC work?
BMW Motorrad ASC compares
the wheel speeds of the front
and rear wheels. From the speed
difference the slip, and with it
the stability reserves on the rear
wheel are determined. When a
slip limit is exceeded, the engine
torque is adapted by the engine
management system.
What are the design
characteristics of the
BMW Motorrad ASC?
BMW Motorrad ASC is an assis-
tance system for the rider and
is designed for riding on public
roads. The extent to which the
rider affects ASC control can be
considerable (weight shifts when
cornering, loose luggage on the
motorcycle), especially when ap-
proaching the limits imposed by
the laws of physics.
The Enduro riding mode should
be activated for off-road riding. In
this mode the controlling inter-
vention by the ASC is carried out
later, enabling controlled drifting.
The system is not optimized for
the special conditions encoun-
tered under extreme weather
during off-road and race-track
use. BMW Motorrad ASC can be
switched off under these condi-
tions.
WARNING
Risky riding style.
Accident hazard despite ASC.
The rider is always responsi-
ble for adapting his/her driving
style.
Do not reduce the system's ex-
tra safety margin with careless
riding or unnecessary risks.
Special situations
As lean angles increase, accel-
eration potential is also progres-
sively restricted by the laws of
physics. This can result in de-
layed acceleration when exiting
very tight curves.
The system compares the rota-
tion speeds of the front and rear
wheels to detect any tendency
for the rear wheel to spin or lose
traction. If the system registers
implausible data for an extended
period of time it will deactivate
the function as safety precaution
and a display will alert you to er-
ror. A self-diagnosis routine must
be completed before the error
will be displayed.
The following unusual riding con-
ditions may lead to automatic
deactivation of BMW Motorrad
ASC:
6
108
z
Technology in detail
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