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The hydraulically switchable gearbox mounts, gearbox mounting
valve 1 N262 and gearbox mounting valve 2 N263 are laterally
mounted to the gearbox and counteract the torsional vibration of
the power unit. They switch between a soft characteristic in inter-
nal combustion mode and a soft characteristic if the e-machine is
used for drive.
The conventional gearbox mount is installed in the rear section of
the gearbox and counteracts the load reversal and tilt functions.
649_109
Reference
For more information about the exhaust flap with electric drive, refer to Self-Study Programme 607 "Audi 4.0l TFSI Engine
with Biturbo Charging".
Exhaust flap on the rear silencer of the 3.0l V6 TDI engine
For acoustic reasons, an electrically driven exhaust flap is inte-
grated in the left tail pipe.
The exhaust flap is closed under the following conditions:
• Whenever the internal combustion engine is started
• When start-stop mode is active
• When the hybrid battery charge level is low
The exhaust flap is closed when the hybrid battery charge level is
low, in order to dampen the acoustic transition from electric drive
to the drive by internal combustion engine.
This is done by slowly opening the exhaust flap thereby damping
the mued noise of the diesel engine.
Electrically powered exhaust flap
Gearbox mounting valve 2
N263
Hydraulically switchable gearbox mounting Conventional gearbox mounting system
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