Power Management - Audi A3 Sportback g-tron Owner's Manual

Off-road er?
Your Audi does not have enough ground clear-
ance to be used as an off-road vehicle.
It
is
therefore best to avoid rough tracks and un-
even terrain as much as possible. Also refer to
q page273.
A
WARNING
- Even with four-wheel drive, you should
always adjust your speed to suit the con-
ditions. Do not let the extra safety affor-
ded by four-wheel drive tempt you into
taking any risks when driving - this can
cause accidents.
- The braking ability of your car is limited
by the g rip of the tyres. In this respect,
your car is no different from a car with-
out four-whee l drive. So do not be temp-
ted to drive too fast on icy or slippery
roads just because the car still has good
acceleration in these conditions (accident
risk).
- On wet roads bear in mind that the front
wheels may start to "aquaplane" and
lose contact with the road if the car is
driven too fast. If this should happen,
there will be no sudden increase in en-
gine speed to warn the driver, as with a
front-wheel drive car. So do not drive too
fast in the wet: adjust your speed to suit
the conditions (accident risk).
Power management
This system helps to ensure reliable
starting
The power management controls the distri-
bution of electrical energy and thus helps to
ensure that there is always enough power
available to start the engine.
-1
If a vehicle with a conventional electrical sys-
tem is left parked for a long time, the battery
will gradually lose its charge because certain
electrical equipment (such as the immobilis-
er) continues to draw current even when the
ignition is off. In some cases there may not be
enough power available to start the engine.
Intelligent technology 187
Your vehicle is equipped with an intelligent
power management system to control the dis-
tribution of electrical energy. This significant-
ly improves reliability when starting the en-
gine, and also prolongs the life of the battery.
The main functions incorporated in the power
management system are battery d iagnosis,
residual current management and dynamic
power management.
Battery diagnosis
The battery diagnosis function constantly reg-
ister: s the condition of the battery. Sensors
detect the battery voltage, battery current
and battery temperature. This enables the
system to ca lculat e the current power level
a nd charge condition of the battery.
Residual current management
The residua l current management reduces
power consumption whi le the vehicle is
parked. It controls the supply of power to the
various electrical components while the igni-
tion is switched off. The system takes the bat-
tery diagnosis data into consideration.
Depending on the power level of the battery,
the individual electrical components are
switched off one after the other to prevent
the battery from losing too much charge and
to ensure that the eng ine can be started relia-
bly.
Dynamic power management
While the vehicle is moving, this funct ion dis-
tributes the avai lable power to the vario,us
electrical components and systems accord ing
to their requirements. The power manage-
ment ensures that on-board systems do not
consume more electrical power than the alter-
nator can supply, and thus maintains the max-
imum possible battery power level.
1
Note
- The power management system is not
able to overcome the given physical lim-
its. Please remember that the power and
life of the battery are limited.
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