BMW 3: Vehicle Sound Generator (VSG)
In the G20 PHEV an acoustic protection for pedestrians is used as standard.
To protect pedestrians
a distinctive sound created specially for electric BMW models is generated
during electric driving.
In comparison with the predecessor model, this is no longer a K CAN3 control
unit with integrated
loudspeaker. The VSG control unit has been integrated into the Receiver Audio
Module (RAM), which
is therefore also responsible for actuation of the VSG loudspeakers.
G20 PHEV, Vehicle Sound Generator
- VSG front loudspeaker
- Receiver Audio Module (RAM)
- VSG rear loudspeaker
When stationary and when driving up to approximately 18 mph (30 km/h), the
RAM generates artificial
engine noise via the VSG loudspeakers which gradually becomes quieter as the
speed increases. The
engine noise is the same when driving forwards and reversing.
System wiring diagram for Vehicle Sound Generator (US version)
- VSG front loudspeaker
- Fuse for rear right power distribution box
- VSG rear loudspeaker
- Receiver Audio Module (RAM)
Due to legal requirements, the VSG is installed in every vehicle that has a
purely electric drive.
Deactivation of the function via the iDrive menu is no longer possible.
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Coordination for starting and ending the charging procedure is performed by
the high-voltage power
management in the EME.
The following actions required by the customer at the start of the charging
procedure:
Adjust the desired charge current level in ampere
Set the start time for charging
Co
The power electronics for the conversion of the AC voltage from the charging
socket to direct current
voltage, which is required for charging the high-voltage battery unit, are
housed in the convenience
charging electronics. The AC voltage is supplied as a single phase. The input
voltage, which c