alternator BMW ACTIVEHYBRID 5 2012 Owners Manual

BMW ActiveHybridVehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equipment
is also described that is not available in a vehicle,
e. g., because of the selected optional equip‐
ment or country variant. This also applies for
safety-related functions and systems.
Hybrid system
At a glance1Combustion engine2Electric motor3Control-system electronics, electric motor4High-voltage cables (orange)5High-voltage battery6Auxiliary battery, combustion engine7Starter battery, combustion engine
The concept
The hybrid system makes it possible to optimize
fuel consumption and driving characteristics.
An electric motor assists the combustion en‐
gine. The vehicle can therefore be driven in cer‐
tain driving situations using only electric power,
which reduces fuel consumption.
In addition to this, the electric motor acts like an
alternator: during braking, it converts the vehi‐
cle's kinetic energy into electricity. The current
is stored in the high-voltage battery and is used
to drive the electric motor.
The hybrid system combines the following func‐
tions:▷Acceleration boost.▷Electric driving.▷Energy recovery: conversion and storage of
kinetic energy as electric current.▷Auto Start/Stop function: automatic stop‐
ping and starting the combustion engine
when coasting, breaking and while stopped.▷Electric operation of the automatic climate
control.
Functions
Acceleration boost: ASSIST and
eBOOST
Driving off and accelerating require a lot of en‐
ergy. To reduce fuel consumption during high
acceleration and to optimize acceleration, the
electric motor supports the combustion engine.
For this purpose, the electric motor is supplied
by the high-voltage battery.
Electric driving: eDRIVE
Under certain conditions, refer to page 67, the
vehicle is powered only by the electric motor.
Driving with the combustion engine:
DRIVE
The combustion engine provides the drive
power to move the vehicle. The high-voltage
battery is charged at the same time.
The hybrid system always starts the combus‐
tion engine automatically.
Seite 27BMW ActiveHybridAt a glance27
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