Audi A3 Sedan 2015 Owner's Manual page 193

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Your veh icle is equipped with an intelligent
energy management
system for distrib uting
e lectricity. This sign ificantly improves the
start ing ability and increases the battery life.
The energy management
system Is made up
of battery diagnosis , idling current manage-
ment and dynamic energy management.
Battery diagnosis
The batt e ry diagnos is determines t he ba tte ry
cha rge leve l. The sensors de t ermine the bat -
tery volt age, t he battery current , and the bat -
tery temperature . The current charge level
and the performance of the battery are deter-
mined based on th is.
Idling current management
The idling current ma nagement decreases t he
ene rgy used whi le par ked . Wit h the engine
switche d off, it ma nages the ene rgy distribu -
tion to the d ifferent e lectr ical components.
Date from battery d iagnosis is taken into ac-
count for th is .
Depending on t he battery charge level, elec-
tr ica l equipment is sw itched off one item after
the ot her, to prevent the battery from dra in-
ing a nd to retain the starting abil ity.
Dynamic energy management
While dr iving, dynamic energy management
d istributes the approp riate amount of energy
to the electrical equipment. It contro ls the
battery charge level so that more energy is
not used the n is being generated in o rder to
main t ain an opt imal batte ry charge level.
{!)
Tips
- Energy management
cannot overcome
the laws of physics . Note that the charge
leve l and length of the battery life are
limit ed.
- Wh en the star ti ng ability is endangered,
the (•) indica t o r light turns on
9 page20.
Smart
Technolog
y
191
What you should know
Maintaining the starting ability is the highest
priority .
A lot of stress is placed o n the batte ry when
driv ing s hort d ista nces, in traffic, and at cold
times of the year . A lot of e ne rgy is used but
little is generated . It is also cr it ica l when the
engine is not running but electr ica l eq uip-
ment is switc hed on. In this case, e nergy is
used but none is gener ated.
In sit uat ions like this , energy management
will active ly regu lated t he di st ribution of e n-
ergy.
Long periods without use
If you do not d rive your vehicle for several
days or weeks, elect rical eq uipment is gradu-
a lly scaled back or sw itched off. This reduc es
energy use and en sures th e vehicle will be
a ble to start aft er long per iods of ti me . Some
conve nience fun ct ions such as ope ning wit h
the remote con t rol key may not be available.
These convenience functions
will
be ava ila ble
again once you switch t he ignit ion on and
start the eng ine.
With the engine switched off
For example, if you listen to the radi o w hen
th e engine is swit ched off, the bat t ery will
drain .
If t he st art ing ability is en da ngere d du e to the
energy cons umption, an error message ap-
pears in vehicles wit h a dr iver informat ion sys -
tem *.
The mess age s hows t hat you nee d to sta rt t he
engine in order to charge t he battery.
With the engine running
Althoug h e lectr ical en ergy is g enerate d while
driv ing , th e bat t ery ca n d ra in . This can happen
whe n littl e e ne rgy is ge nera t ed, a nd much is
used an d th e charg e leve l of th e batt ery is not
o ptimal.
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