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182
Intelligent
technolog
y
- On wet road surfaces , be careful not to
dr ive too fast because the front wheels
could beg in to slide on top of the water
(aquaplaning). If this should occur, you
will have no warning from a sudden in-
crease in engine speed as with a front-
wheel drive vehicle. Always drive at
speeds w hich are suited to t he road con-
dit ions - risk of crash.
Energy
management
Starting ability is optimized
Energy management controls the distribution
of electrical energy and thus optimi zes the
availability of electrical energy for s tarting
the engine.
If a vehicle with a conventional energy system
is not driven for a long period of time, the bat-
te ry is discharged by idling current consumers
(e.g. immobilizer) . In certain circumstances it
can result in t here bei ng insufficient energy
available to start th e engi ne.
Intell igent energy management in your veh i-
cle hand les the distribution of electrical ener-
gy. Starting abili ty is markedly improved and
the life of the battery is extended .
Basically, energy management consists of
battery diagnosis, idling current manage-
ment and dynamic energy management .
Battery diagnosis
Battery diagnosis continuously determ ines
the state of the battery. Sensors determ ine
battery voltage, bat te ry current and battery
temperature . This dete rmines the current
state of charge and the powe r of the battery.
Idling current management
Idling current management reduces energy
consumption while the vehicle is stand ing.
W ith the igni t ion switched off, it cont rols the
energy supply to the various electr ical compo -
nents . Data from battery diagnosis is consid-
ered.
Depend ing on the bat te ry's state of charge,
indivi dual consumers are gradually turned off
to prevent excessive discharge of t he battery
and th us maintain starting capability.
Dynamic energy management
While the vehicle is being driven, dynami c en-
ergy management distr ibutes t he energy gen -
erated according to t he needs of the indivi du -
al components . It regulates consumption, so
t hat more electrical energy is not being used
t han is being generated and ensures an opti-
mal state of charge fo r the battery .
(D
Tips
- But even energy management cannot
negate the limits of physics. Consider
t hat the powe r and life of a battery are
limited.
- If start ing ability is t hreatened , the indi-
cator light (•) appears ~
page 17 .
What you should know
The highest priority is given to maintaining
starting capability.
The battery is severely taxed in short-d istance
driv ing, in city traff ic and during the cold time
of year. Abundant electrical energy is re-
quired, but on ly a little is generated . It is also
crit ical if t he engi ne is not running and electri-
cal compone nts are t urned on . I n this in-
sta nce energy is being consumed but none is
being generat ed.
It is in precisely these situations that you will
not ice energy management act ively reg ulat-
ing t he di stribu t ion of energy.
Vehicle stands for an extended period
If you do not drive your vehicle over a period
of several days or weeks, electr ical compo-
nents are gradually cut back or switched off.
This reduces energy consump ti on and ma in-
ta ins st art ing capabili t y over a longer period .
Some of t he convenience f unct ions may not
operat e, such as t he interio r lights or t he
power seat adjustme nt. The convenience
ll-
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