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228
Intelligent
technology
will have no warning from a sudden in-
crease in engine speed as with a front-
wheel drive vehicle. Always drive at
speeds wh ich are suited to the road con-
ditions - risk of crash.
Energy
management
Starting ability is optimized
Energy management controls the distribution
of electrical energy and thus optimizes the
availability of electrical energy for starting
the engine.
If a vehicle with a conventional energy system
is not driven for a long period of time , the bat-
tery is discharged by idling current consumers
(e.g. immobilizer) . In certain circumstances it
can result in there being insufficient energy
available to start the engine.
Intelligent energy management
in your vehi-
cle handles the distribution of electrical ener-
gy. Starting ability 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 determines
the state of the battery. Senso rs determine
battery voltage, battery current and battery
temperature.
This determines the current
state of charge and the power of the battery.
Idling current management
Idling current management
reduces energy
consumption while the vehicle is standing.
With the ignition switched off, it contro ls the
energy supply to the various e lectrica l compo-
nents. Data from battery diagnosis is consid-
ered.
Depending on the battery's state of charge,
individual consumers are gradually turned off
to prevent excessive discharge of the battery
and thus ma intain starting capability.
Dynamic energy management
While the vehicle is being driven, dynamic en-
ergy management
distributes the energy gen -
erated according to the needs of the individu-
al components.
It regulates consumption,
so
that more electrical energy is not being used
than is being generated and ensures an opti-
mal state of charge for the battery.
(!)
Tips
- But even energy management
cannot
negate the limits of physics. Consider
that the power and life of a battery are
limited.
- If start ing ability is threatened,
you are
informed by a warning
¢
page
229,
Driver notification in the instrument
cluster display.
What you should know
The highest priority is given to maintaining
starting capability.
The battery is severely taxed in short-distance
driving, in city traffic and during the cold time
of year. Abundant electrical energy is re-
quired, but only a little is generated . It is also
critical if the engine is not running and electri -
cal components are turned on. In this in-
stance energy is being consumed but none is
being generated.
It is in precise ly these s ituations that you will
notice energy management
active ly regu lat -
ing the distribution of ene rgy.
Vehicle stands for an extended period
If you do not drive your vehicle over a period
of several days or weeks, e lectr ica l compo-
nents are gradually cut back or sw itched off.
This reduces energy consumption and ma in-
ta ins starting capability over a longer period.
Take into consideration that when you unlock
your vehicle, some convenience functions,
such as the interior lights or the power seat
adjustment,
may not be availab le. The con-
venience functions will be availab le again
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