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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 A5 shows its heavily camouflaged face

The new Audi A4 is set to launch at the Frankfurt Motor Show in September, so it shouldn't come as too big of a surprise that an updated A5 is on the way, as well. Our spies just caught the coupe testing for the first time while wearing heavy camouflage from nose to tail. Despite the concealment, some details are possible to make out, especially when comparing the two-door design to the previously spied A4. Audi is further differentiating the designs, and the A5's front end is significantly changed based on these photos. The headlights appear larger and more acutely angled than the narrower units on the sedan. Also, the lower bumper gets square intakes at each corner and the shape creates an additional opening in the center for the coupe. In profile, it's easy to notice the quicker sloping roof and smaller side windows. Only the rear end of the two models seem to share many significant cues. The new A5 reportedly rides on the same MLB Evo platform as the upcoming A4 to shed around 200 pounds. The two models might not launch at the same time, though, and the coupe could join the lineup somewhat later. S5 and RS5 variants are expected to join the range further down the line, too.

VW Group recalls 27k Touaregs, Audis and Porsches for fuel leak

The Volkswagen Group is one of the most expansive in the entire industry, and shares parts across more product lines than we could wrap our heads around. So when the German megalith finds a fault in one of its components, it has the capacity to spread like wildfire. The latest set of recall notices from the National Highway Traffic Safety Administration covers vehicles from the Volkswagen, Audi and Porsche divisions. The problem revolves around the fuel injection system, which could potentially leak and cause a fire. The recall affects – deep breath now – the 2012 VW Touareg Hybrid, the 2011-12 Porsche Cayenne S Hybrid and Panamera S Hybrid, 2011-12 Audi S4, S5 and Q7 and the 2012-13 Audi A7. All told, that amounts to 27,376 units, the owners of which can expect to hear from the manufacturer to have the fuel rails replaced, along with their corresponding seals (having nothing to do with marine mammals writing letters). RECALL Subject : Fuel Injection System Fuel Leak Report Receipt Date: JAN 20, 2015 NHTSA Campaign Number: 15V019000 Component(s): FUEL SYSTEM, GASOLINE Potential Number of Units Affected: 26,008 Manufacturer: Volkswagen Group of America, Inc. SUMMARY: Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2011-2012 Audi S4, S5, Q7, 2012 Audi A6, Volkswagen Touareg Hybrid, and 2012-2013 Audi A7 vehicles. In the affected vehicles the fuel injection system may experience a fuel leak. CONSEQUENCE: A fuel leak in the injection system in the presence of an ignition source, increases the risk of a fire. REMEDY: Volkswagen will notify owners, and dealers will replace the fuel rails and corresponding seals, free of charge. The recall is expected to begin March 10, 2015. Owners may contact Audi customer service at 1-800-822-2834 or Volkswagen customer service at 1-800-893-5298. Volkswagen's numbers for this recall are 24AP for Audi customers and 24BK for Volkswagen customers. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov. ### RECALL Subject : Fuel Injection System may Leak Report Receipt Date: JAN 20, 2015 NHTSA Campaign Number: 15V016000 Component(s): ENGINE AND ENGINE COOLING Potential Number of Units Affected: 1,368 Manufacturer: Porsche Cars North America, Inc. SUMMARY: Porsche Cars North America, Inc.