Audi 2011 Annual Report Download - page 102

V8 engine
The cylinder on demand technology deactivates four of the eight cylinders when
necessary. The intake and exhaust valves marked in green are deactivated, as is
the fuel injection for these cylinders. Sophisticated technologies ensure that the
transition from eight to four cylinders is virtually imperceptible for the driver.
It is not easy to save fuel – the driver’s
intentions and how he or she operates
the gas pedal has to be foreseeable.
Audi has developed a prediction
module for exactly that. It detects
the driving situation, steering and gas
pedal movements electronically. It can
recognize whether the driver is driving
constantly at a given pace or is just
briefl y cruising through a roundabout.
This makes it possible to tell when
the transition to four cylinders is
worthwhile. In the interest of the
overall result.
The path to achieving the goal: This is
where human and machine diff er more
clearly. For Magdalena Neuner, this
means mental training, physical fi tness
and years of practice. The Audi uses a
sensitive system of sensors, innovative
acoustic systems and active engine
bearings. The active noise control
system uses microphones to detect
hum frequencies in the cabin during
four-cylinder operation. And generates
a cancellation sound. The active engine
bearings work in a very similar way
to generate cancellation impulses for
engine vibrations. The driver barely
notices whether four or eight
cylinders are active.
The greatest compliment in short:
Magdalena Neuner’s method saves
time. Otherwise the elite athlete
would not have won multiple world
championships and gold medals. And
despite all successes, she has kept
her authentic, likeable character.
The Audi S6 with cylinder on demand
technology saves fuel – a total of
around 25 percent compared with
the previous model. Yet despite all its
economy, the new Audi S6 maintains
its authentic V8 character.
A double dose of impressive
athleticism in its purest form.
Magdalena Neuner’s engine – her heart – beats 180 times a minute at the end of a skiing
leg. She doesn’t reduce her pace until just 150 meters before the shooting range.
Neuner has to concentrate at the range. Her pulse slows to 150 beats per minute,
which is still high.
Exceptional athletes together:
Biathlete Magdalena Neuner
meets the new Audi S6.
It is not easy to
save fuel – the driver’s
intentions must
be foreseeable.
Responsibility _
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Activated
Deactivated