Volkswagen's hybrid concept for 0.9 litres/100 km
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26th January, 2011
Future mobility is just one of topic of our time. One question may
be: Just how motor vehicle fuel consumption could be reduced in the name of efficiency? There is now an answer to
this question, and Volkswagen is delivering it in the form of the new XL1. Combined fuel consumption is just 0.9
l/100 km. No other hybrid car powered by an electric motor/internal combustion engine combination is more fuel
efficient. The prototype will be unveiled today, in a world debut at the Qatar Motor Show (26th - 29th January).
Conceptually, the XL1 represents the third evolutionary stage of Volkswagen’s 1-litre car strategy. Several
years ago Prof. Dr. Ferdinand Piëch, who is today's Chairman of the Supervisory Board of Volkswagen AG,
formulated the visionary goal of bringing to the market a production car that was practical for everyday use
with a fuel consumption of 1.0 litre per 100 km. In the new XL1, Volkswagen is demonstrating that this goal is
now within reach.
The new Volkswagen XL1 concept attains a CO2 emissions value of just 24 g/km, thanks to a combination of
lightweight construction (monocoque and add-on parts made of carbon fibre), very low aerodynamic drag (Cd 0.186)
and a plug-in hybrid system - consisting of a two cylinder TDI engine (35 kW/48 PS), E-motor (20 kW/27 PS),
7-speed dual-clutch transmission (DSG) and lithium-ion battery. The results: with fuel consumption of 0.9 l/100
km, the new Volkswagen XL1 only emits 24 g/km CO2. Since it is designed as a plug-in hybrid, the XL1 prototype
only has a driving range of up to 35 kilometres in pure electric mode, i.e. with zero emissions at point of use.
The battery can be charged from a conventional household electric outlet. Naturally, battery regeneration is also
employed to recover energy while slowing down and store as much of it as possible in the battery for re-use. In
this case, the electric motor acts as an electric generator.
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Despite the very high levels of efficiency, developers were able to design a body layout that offers greater
everyday practicality, incorporating side by side seating rather than the tandem arrangement that was seen in
both the first 1-litre car presented in 2002 and the L1 presented in 2009. In the new XL1, wing doors make it
easier to enter and exit the car. Further progress has been made by manufacturing body parts from carbon fibre
reinforced polymer parts (CFRP), a technique used in Formula 1 car construction. Once again, Volkswagen has
successfully achieved significant reductions in production costs – an important step forward to make viable a
limited production run of the XL1. Background: together with suppliers, Volkswagen has developed and patented a
new system for CFRP production in what is known as the aRTM process (advanced Resin Transfer Moulding).
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