Audi 2009 Annual Report Download - page 168

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165
Management Report
132 Audi Group
140 Business and
underlying situation
153 Financial performance
indicators
157 Social and ecological aspects
157 Employees
159 Audi in society
160 Location-based
environmental aspects
163 Product-based
environmental aspects
168 Risks, opportunities
and outlook
177 Disclaimer
Modular efficiency platform
The innovative technologies that constitute the modular efficiency platform are decisively help-
ing to improve fuel efficiency and cut CO2 emissions in all Audi brand vehicles. The portfolio of
effective efficiency modules comprises a variety of components. Many of these technologies,
such as the energy recovery system that ensures surplus braking energy is not lost, are already
standard features of many Audi models. In 2009, two important features, the start-stop system
and the driver information system with efficiency program, were added to the modular efficiency
platform. Currently the cleanest diesel technology available was furthermore introduced in two
car lines in 2009.
THE MODULAR AUDI EFFICIENCY PLATFORM
Start-stop system
The Audi brand introduced another technology for improving fuel economy and reducing CO2
emissions in the form of the start-stop system. This system automatically switches off the en-
gine when the vehicle halts briefly, for instance at traffic signals, making it particularly benefi-
cial in city traffic. To prompt the engine to switch off, all the driver needs to do is move into
neutral and release the clutch while the car is stationary. When the clutch is pressed again, the
engine starts automatically and will already have reached idle speed by the time the driver has
engaged a gear. The start-stop system is quiet-running and highly responsive. The system cuts
fuel consumption by around 0.2 liters per 100 kilometers and CO2 emissions by about 5 g/km.
The driver can switch off the function at any time at the push of a button. The start-stop system
was first used on models with various types of engine in the Audi A3, Audi A4 and Audi A5 car
lines.
Assistance systems
Economical route guidance
Dynamic congestion avoidance
Gear-change indicator
Audi adaptive cruise control
with stop & go function
LED daytime running lights
Driver information system with
efficiency program
Ancillaries
Electromechanical steering
Improved hydraulic steering
Lightweight design
Audi Space Frame (ASF)
Innovative combinations of materials
Driving and rolling resistance
Aerodynamic measures
Tires with optimized rolling resistance
Engines
TDI
TDI clean diesel
Common rail technologies
FSI
TFSI
Audi valvelift system (AVS)
Transmission
6-speed and 7-speed S tronic
dual-clutch transmission
8-speed tiptronic
R tronic
multitronic
Fuel-saving transmission
Energy management
Highly efficient air conditioning
Energy recovery
Start-stop system
Thermo-management