Efficiency - Audi A6 Pricing And Specification Manual

Efficiency

At Audi, doing less is something we're trying
to do more of. We're working to use less fuel,
release less CO and waste less energy. It's why
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we've incorporated a number of more efficient
technologies into the Audi A6.
Recuperation
When a vehicle brakes, the discs convert the kinetic
energy into thermal energy, which is wasted as
it cannot be used. With a recuperation system,
like the one in the Audi A6, the kinetic energy is
converted into useful electrical energy. The way
it works is simple. While the car is coasting or
braking, the alternator voltage is raised above the
level of the basic electrical system, which enables
the alternator to generate electrical energy and
store it temporarily in the battery. When the
vehicle accelerates, this energy is used to
relieve the load on the alternator, resulting
in a fuel saving of up to 3%.
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