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Audi says new 48 volt micro-hybrid system improves fuel economy, paves way for electrification

Most cars use a 12-volt system to power their electrical components. But, with more and more electric bits and bobs being added to new vehicles, a dozen volts is looking a bit weak these days. In fact, Audi says that standard 12-volt systems are being stretched "to their very limits." Enter 48 volts. If used in a car that gets 40 mpg, that would translate to around 43.5 mpg. Audi is testing a supplemental 48-volt electric system in two prototype vehicles – modified mild-hybrid versions of the A6 TDI and the RS 5 TDI – in order to add in more electric technology (an electric compressor, for example, to improve acceleration) and "convenience systems for dynamic chassis control." Audi says it has more applications in the pipeline, but the overall gist is that the German automaker sees 48 volts as an "important building block in electrification strategy." As you can see in the picture above (click to enlarge), the RS 5 TDI concept uses a li-ion battery installed in the back of the car and an alternator to provide 48 volts when the engine is off. Audi says that the 48-volt system can save up to 0.4 liters of fuel per 100 kilometers. To put that into US numbers, if used in a car that gets 40 miles per gallon today, that would translate into a bump up to around 43.5 mpg. The Advanced Lead Acid Battery Consortium (ALABC) is also working on a 48-volt system to improve fuel economy and we've got a deep dive of Audi's electric turbocharger here. Even more powerful and efficient – the new 48-volt technology from Audi Important building block in electrification strategy More voltage and more power for new technologies Scalable platform concept suitable for wide-ranging uses Ingolstadt, August 25, 2014 – Audi is to upgrade part of its vehicle electrical system from twelve to 48 volts. The move represents another technical building block for facilitating the integration of new automotive technologies while increasing the power and efficiency of its cars. "We are using the full bandwidth of electrification in our drive principles strategy. Running part of the vehicle electrical system at 48 volts plays a central role in this," commented Prof. Dr. Ulrich Hackenberg, Member of the Board of Management for Technical Development at Audi. "It enables us to make more energy available.

Audi recalls 2013-2014 S6 and S7 models over fuel line leak

If you've been driving a late model Audi S6 or S7, first of all, good for you. Secondly, you should be expecting a call from your local dealer as the Volkswagen Group and the National Highway Traffic Safety Administration have issued a recall.
The problem apparently involves a potential leak in the fuel line, which, as any mechanic or McGuyver fan could tell you, is not such a good thing. As NHTSA points out, it "may result in a fire."
The recall involves 3,594 vehicles in these United States, specifically model-year 2013 and 2014 Audi S6 and S7 models equipped with the 4.0-liter twin-turbo V8. (It does not, however, seem to affect the S8 or any of the Bentleys that are powered by the same engine.) Owners of said cars can expect to be contacted regarding how the problem will be fixed. In the meantime you can read the official notice below.

Audi chooses A3 as its Super Bowl darling

With Super Bowl XLVIII less than two months away, we're sure to hear plenty of news about automakers and their various plans for in-game commercials. Audi has announced that it will return for its seventh year of Super Bowl advertising, but few details were provided about the spot other than the fact that it will focus on the all-new 2015 A3.
The 60-second ad will air during the third quarter of the game, and while Audi did not say how much it is spending on the spot, Ad Age says that a 30-second commercial will average around $4 million for next year's Big Game. Last year, Audi's choose-your-own-adventure "Prom" commercial was the second favorite video in our unofficial poll of readers, but the competition should heat up even more this year with General Motors returning to Super Bowl advertising after taking a year off and Jaguar preparing its first-ever Super Bowl ad to introduce the F-Type Coupe.