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S tronic
S tronic: 2 multi-disc clutches ensure
sporty dynamics and a high level of
efficiency.
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The 7-speed dual clutch transmission enables
rapid gear shifting with hardly any perceptible
break in propulsive power and is therefore
particularly efficient.
As long ago as 1985, Walter Röhrl tested this
technology in the Sport quattro S1 – and was
suitably impressed. Audi drivers share his
enthusiasm to this day, because the modern
Stronic changes gear in a flash. To do this, two
multi-plate clutches serve the different gears. One
large clutch transfers the torque via a solid drive
shaft to the gearwheels of the odd-numbered
gears. A second clutch serves the even-numbered
gears via a hollow shaft. Both parts of the
transmission are permanently active, although
there is only ever one actively connected to the
engine via a closed clutch. For example, when the
driver accelerates in third gear, the second part of
the transmission is already engaged in fourth
gear. The gear change happens very quickly
through the change of clutches – the first clutch
opens, whilst the second one closes. The gear
change only lasts a few hundredths of a second
and is completed with virtually no interruption in
the power flow. It runs so smoothly and
comfortably that the driver barely notices it.
It does not matter whether the driver chooses
the fully automatic modes with the programs
D (Drive) or S (Sport) or, for example, changes
gear manually with the optional shift paddles –
the gear change feels precise and extremely
sportive. Even with all of this dynamic technology,
the S tronic still remains very efficient. Due to its
high level of efficiency, it helps to reduce both fuel
consumption and emissions.
What is the benefit of
two clutches?
A double saving: time and energy.
The fuel consumption and CO₂ emission figures can be found from page 120 onwards.
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