BMW 5 Series: 24 V Electronic Power Steering
The greater weight of the engines in the G30 on vehicles with 8-cylinder
engines results in a higher
front axle load. This has the effect that the required power of the steering
assist increases. Due to
these high currents, it is necessary to increase the voltage supply of the EPS
to 24 V.
An auxiliary battery, separating element and a charging unit for the auxiliary
battery are required for
this. These components are installed in the luggage compartment of the G30.
The charging unit monitors the state of charge and also charges the auxiliary
battery using a DC/DC
converter. The EPS is only supplied with 24 V once this relay has been
activated. The EPS can also be
operated with 12 V in the event of a fault.
Voltage supply for 24 V steering
- Dynamic Stability Control (DSC)
- Digital Motor Electronics (DME)
- Electronic Power Steering (EPS)
- Fuse for front right power distribution box
- Body Domain Controller (BDC)
- Fuse in the rear power distribution box
- Power Control Unit PCU 150 W
- Separator
- Auxiliary battery in the luggage compartment
- Fuse in the power distribution box, battery
- Battery
- Advanced Crash Safety Module (ACSM)
- Brake light switch
- Steering column switch cluster (SZL)
- Instrument panel (KOMBI)
Auxiliary battery with separating element
Battery and separating element
- Auxiliary battery in the luggage compartment
- Separator
Power Control Unit
150 W Power Control Unit
The Power Control Unit monitors the state of charge and also charges the
auxiliary battery using a
DC/DC converter.
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Introduction
The terminal control in the G30 is identical to the terminal control of the
G12. In the G30, the vehicle
is always in the right condition from the point of view of the customer. The
ter
Control units in the vehicle must be supplied with power only when they are
needed. The following
terminals are used in the G30:
Terminal 15N
Terminal 30B
Terminal 30F
Terminal 30
Terminal 15N
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The following graphic shows the positions of the rotary valve as the coolant
temperature increases.
Circuit diagram of heat management module in B58TU engine
0 % - Rotary valve closed
100% - Rotary valve open
Cold start
Warm-up phase
Operating temperature
Transition from normal operatio
Concept
The function helps develop an especially efficient
driving style and to conserve fuel.
For this purpose, the driving style is analyzed.
The assessment is done in various categories
and is displayed on the Control Display.
This display will help you adjust your driving style
and save some