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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 Audi TT glimpsed, same as it ever was?

Audi has teased the new TT coupe ahead of its Geneva Motor Show reveal with renderings and video, but now, what appears to be a photo of the new two-door has leaked onto the web, courtesy of Autofans.be. And if you're thinking, "Well, jeez, that looks familiar," you definitely aren't alone. Aside from the new lighting character in the taillamps, everything you see here looks pretty much unchanged from the old car. Of course, the front should get a nice freshening, and that interior should be super-high-tech. We'll reserve final judgments until we see the new TT live in Geneva next week.

New Transporter 4 Refueled prequel trailer comes with new lead, new Audi S8

Frank Martin returns in a new installment of the franchise that helped make Jason Statham that guy, this one called Transporter 4: Refueled. But ugh, what's happened to all the decent car movies? The problem here isn't that Statham left this series to play the baddie in Fast & Furious 7, but that the trailer makes it appear the director just combined the unused footage from a rap video and a Michael Bay movie, only forgot to include any rappers or input from Michael Bay. The trailer gives no clue as to what the movie's about, but it's not like we don't know – actor Ed Skrein has to take something somewhere while people try to kill him. Skrein does his best (we assume) to fill Statham's large shoes, helped and hindered by the entire line-up of Sports Illustrated's swimsuit issue, a second reserve alternate Bond villain, gigatons of CGI, and more fireballs than the Milky Way. Oh, and this is a prequel to the series, so just like you did with Darth Maul's double-sided light saber, ignore the extreme newness of Skrein's current generation Audi S8. Related Video: