BMW 5 Series: Partial network operation
Today's premium vehicles contain up to 70 control units with well over 100 micro-controllers which are networked with each other. However, depending on the current vehicle condition or the vehicle user requirements, not all convenience and assistance systems may always be needed.
It is possible to save energy, relieve the load on the battery and also prolong the battery life by targeted deactivation and activation on control units which are not needed, so-called selective partial network operation.
If functions are not used or needed when driving, e.g.:
- Seat adjustment
Prerequisites for partial network operation
The partial network in the Body Domain Controller calculates the partial network status on the basis of the current vehicle condition and the required functions. The control units that are not required are switched off by means of the corresponding bus messages.
Prerequisites of control units for partial network operation
Different transceivers are used in order to operate the partial network operation in control units.
These transceivers are able to evaluate and interpret messages. This control unit remains switched off as long as any bus communication takes place without a valid wake-up event for the corresponding control unit being present. If a valid wake-up event for the corresponding control unit is sent on the bus, the transceiver can activate the voltage regulator of the micro-controller and the control unit starts up. The control unit is switched off by deactivation of the voltage regulator.
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History, Overview of system descriptions
History
Historical overview of the BMW 5 Series
E12 (1972-1981)
E28 (1981-1987)
E34 (1987-1995)
E39 (1995-2003)
E60 (2003-2010)
F10 (2010-2016)
G30 (production starts in late 2016 as a 2017 M
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System limits
Detection range
The detection capacity of the system and the
automatic braking capacity are limited.
Two-wheeled vehicles for instance might not be
detected.
Deceleration
The system does not decelerate in the following
situations:
For pedestrians or similarly slow-moving road
users.
For red tr
Crankcase
Honing process
Honing process "old/new"
Previous manufacturing process of internal cylindrical honing
New manufacturing process of form honing
The cylindrical bore hole of a combustion engine becomes deformed during the
operating condition
by thermal loads. Form honing allows this deformation
