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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.

Next-gen Audi Q7 to debut in Detroit

Audi's public relations team must really be getting fed up with research and design boss Ulrich Hackenberg. Aside from basically confirming that the next Audi R8 will share its bones with the Lamborghini Huracán and noting that it may take advantage of the Asterion Concept's hybrid powertrain technology, he's now let slip that the second-generation Q7 will arrive in January at the 2015 Detroit Auto Show.
"If you make a trip to Detroit, you'll see it," Hackenberg reportedly told Indian Autos Blog during Paris Motor Show festivities.
That's a bombshell, particularly as we've heard plenty about its potential powertrain technologies, including spy shots of diesel-powered models, plug-in-hybrids, sporty SQ7s and electric turbochargers, but there's been absolutely nothing concrete about when and where the car would debut.

Audi to unveil S1 hot hatch at Geneva Motor Show

Audi has been toying with the idea of a hot hatch based on the A1 premium city car for some time now. It rolled out the 500-horsepower A1 Clubsport Quattro concept at the Wörthersee gathering a couple of years ago, then put its form (with half the power) into limited production with the 252hp A1 Quattro (pictured above) shortly thereafter. What it hasn't done is offer a mainstream S1 that people can actually get their hands on, but that's all about to change.
Following spy shots of numerous prototypes, Auto Express claims to have it on good authority that the new S1 will be unveiled at the upcoming Geneva Motor Show in March. Though likely less aggressive in its visual impact, the S1 is expected to get almost as much power as the aforementioned A1 Quattro, with a 2.0-liter turbo 4-cylinder sourced from the larger S3 but detuned to 230 hp.
A six-speed dual-clutch transmission is expected to drive all four wheels - something for which the platform was not originally designed but was later adapted to accommodate - though the availability of a six-speed manual remains in question. Unfortunately the A1 was never destined for the North American market, so as much as we might want one (and as much as Ingolstadt may be motivated to take a bite out of the Mini market), we wouldn't expect to see it roaring into American showrooms.