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  • bartholomewcubbins bartholomewcubbins Feb 11, 2014 4:22 PM Flag

    From Plugincars - Audi R8 e-tron Electric Supercar Reportedly Slated for Mid-2014

    Audi R8 e-tron Electric Supercar Reportedly Slated for Mid-2014

    By David Herron · December 17, 2013

    The Audi R8 e-tron on the Nürburgring, May 2013
    The Audi R8 e-tron, an all-electric sports car, was first shown to the public in October 2009 at the Frankfurt Motor Show. After years of development, it was apparently canceled for any number of uncertain reasons. But if new reports are to be believed, it was never really shelved or it was brought back to life, heading for sale to the public in mid-2014. The new model will feature longer driving range, thanks to better battery technology.

    According to AutoCar, what caused Audi to renew the Audi R8 e-tron is new lithium-ion battery technology. Where the original R8 e-tron had a range of 215 km (134 miles) from a 42.4 kilowatt-hour battery pack, the new R8 e-tron will have a 400 km (248.5 mile) range. This range will require something on the order of a 80 kilowatt-hour battery pack, a level of driving range only offered by Tesla Motors so far.

    The R8 e-tron could go into limited production during the second half of 2014, and will serve as a "halo" model for Audi's other electrified car efforts. It is expected to be built on the second generation R8 platform, which will give the R8 e-tron an aluminum and carbon-fiber body structure.

    Detailed specifications are not available with any certainty. But development was very advanced when the project was canceled last year, meaning that the prototype shown in May 2013, with which Audi set a new lap record at the Nürburgring of 8 minutes 9.099 seconds, should be close to the production version. (more)

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    • The improved chart and this story could propel UQM up 20 cents a share Wednesday.
      Thanks Bart - Just imagine over 600 ft lb of torque

    • rest of article:

      That car had two electric motors powering the rear axle, producing 280 kilowatts (380 horsepower) of power, 820 Nm (604 ft-lb) of torque, and a 0-60 sprint time of 4.2 seconds. Thanks to torque vectoring and targeted braking resulting in precisely controlling acceleration at each wheel, Audi claims the R8 e-tron will have better handling for racing through corners. The response of this system is very fast, and can theoretically slow down one wheel while giving the other wheel full power.

      Thanks to a Multimaterial Space Frame, with a carbon-fiber-reinforced polymer (CFRP) and aluminum frame, the prototype R8 e-tron weighed in at 1,780 kilograms, or just under two tons. The battery pack functions as a structural element of the frame. The charging system disclosed in May supported both AC level 2 charging and DC fast charging, with a one-hour charging time under ideal circumstances.

      Audi designed several weight-saving features like coil springs made from glass-fiber-reinforced polymer (GFRP), weighing only 1.2 and 1.3 kilograms (2.65 and 2.87 lb), which is much less than traditional steel springs. It's highly aerodynamic, with a very low drag coefficient (cD 0.27), and there are even flaps on the wheels which close automatically at higher speeds to improve aerodynamics even more.

      Assuming Audi indeed this time starts actual although limited production of the R8 e-tron, it will be competing against the BMW i8 plug-in hybrid sports car.

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