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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 reveals updated RS7 Sportback in Europe

It was just a couple of weeks ago that Audi revealed a few mild updates to its A7. It even ported those changes over to the warmed-up S7 performance version. All that was missing was the full-steam RS7, and that's precisely what we have here.
Now before you get all excited, note that the new RS7 packs the same powertrain as the model it succeeds, but then again, the existing RS7 hardly lacked in the power department. The 4.0-liter twin-turbo V8 still churns out 560 horsepower and 516 pound-feet of torque, transmitted to all four wheels through an eight-speed automatic. Revealed initially for the European market (with US details presumably to follow), the 0-62 kilometers per hour time is quoted at 3.9 seconds, so the 0-60 mph time ought to match the 3.7 seconds of the preceding model.
What has changed are the subtle tweaks Audi has made to the exterior and equipment upgrades inside. The grille now features has a horizontal section at the bottom with the Quattro logo emblazoned across like all other recently revised RS models, flanked by new headlights (Matrix LED units for the European market). Inside the cabin the air-con vents and shift paddles have been reshaped, and the new MMI system ports over from the new A7 and S7 with 4G LTE connectivity and a Bang & Olufsen sound system.

Audi TT offroad concept wirelessly charges E-Tron quattro powertrain

Audi has been diving deep into the concept ideas pool for a while now, with out-there auto-show-only vehicles like the off-road Nanuk Quattro Concept (last year's Frankfurt Show) and the TT-previewing Allroad Shooting Brake (Detroit earlier this year). The automaker has also been hinting at wireless charging through its work with WiTricitiry and the Urban Concept Sportback from Frankfurt 2011. The latest evolution of these ideas is the brand-new Audi TT offroad concept show car, which makes an appearance at the Beijing Motor Show this weekend after being teased earlier this month. Putting wireless charging into an off-road body makes little sense at first glance - after all, if you're heading out into the wild, you'll be lucky enough to find a standard outlet - finding an in-ground induction pad will be near-impossible. Thankfully, we don't need to worry ourselves with this sort of logical conflict, since this is once again an auto show study. The powertrain is capable of 408 hp and 479.2 lb-ft of torque as well 123 MPGe. And that means interesting powertrain details, like a plug-in hybrid E-Tron quattro powertrain that uses two electric motors (one rated at 40 kW for the front axle, the other at 85 kW for the rear) and can even dispense with the plug part thanks to Audi Wireless Charging technology. The powertrain is capable of a total system output of 408 horsepower and 479.2 pound-feet of torque as well as a provisional fuel efficiency of over 123 miles per gallon equivalent. All with the ability to hit 100 kilometers per hour (62 miles per hour) in 5.2 seconds and a top speed of 155 mph. All-electric range is pegged at 31 miles thanks to a 12-kWH lithium-ion battery. More details than you can shake a stick at are available below. Audi says the TT offroad concept, which blends both coupe and compact SUV, could be a preview of "a new model in a future TT family," so if you've been hoping for another entry in the growing crossover coupe segment, tell Audi you'd like to see this in the real world some day. The Audi TT offroad concept show car Study combines the sportiness of a coupe with the utility of a compact SUV Powerful and efficient e-tron quattro drive with Audi Wireless Charging technology Prof. Dr.