Nice Looking Audi A5 Convertible on 2040-cars

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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.

The 2014 Rolex 24 at Daytona: What we learned, what we saw

Two days after the flag dropped on the 2014 Rolex 24 at Daytona, people are still trying to figure out what it might portend for the rest of the season. In 24 hours, two minutes and 24 seconds, 695 laps were completed by the car that crossed the line first. During that time, 67 cars began the race, 18 of them retired. There was that accident, and a red flag. There were supposedly slower classes beating supposedly faster classes. There were 16 caution periods, including that yellow flag. And then there was The Decision. And Then The Uproar. And then The Reversal.
There was also some pretty good racing, so let's have one last look at the weekend. Oh, and there was that 1964 Ferrari 250 GTO Series II...
If you want to skip the reading bits and go to the photos, there's a high-res gallery of 158 images above and a couple more below. Enjoy.

2013 Audi RS6 Avant [w/video]

Latest, Greatest Autobahn Bomber Will Not Be Denied - Except To Us
Back in 2008, I was fortunate enough to test the second-generation Audi RS6 Avant in southern France on the supremely well-sorted circuit at Le Castellet, a.k.a. Paul Ricard. I was thrown out there with the 572-horsepower bi-turbo 5.0-liter V10-equipped behemoth behind one of Audi's DTM pros and was convinced in short order that the flaming hippo in my hands was going to get the better of me on one or another of the track's tight esses. I made it out alive and invigorated, of course, but knew that that RS6 Avant was the heaviest that these thunderwagons should ever be allowed to get. At around 4,650 pounds with driver aboard, it was just way more lateral momentum at speed than any pilot needs on a track - or for that matter, on a favorite hot curving road.
Now it's time for the 2013 Audi RS6 Avant to lay us out with a flying scissor kick from the corner ropes. This version of the highway and byway marauder from Quattro GmbH is a decidedly greater piece of work than was the car I drove in 2008. This time, there will only be the Avant body configuration - no RS6 sedan - and, as with the previous generation, North America won't be at the receiving end when deliveries start at the end of July this year.