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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 bringing Q3 Stateside after all?

One of the major changes that made to the Audi SQ5 to get it ready for the US market was a ride height that was lifted by 1.2 inches compared to its European counterparts. The small increase allowed the SQ5 to retain its "light truck" classification of the Q5 for emissions regulations. In a similar move, Car and Driver is reporting that the Audi Q3 crossover will also be joining the Audi lineup in the US once it receives a facelift and taller ride height.
Expect this facelift to fit in with other recent product updates including the Q5, which mainly focused on a cleaner, more upscale front end and the company's signature LED running lights. The report says that Audi could bring the Q3 Stateside "within a year or two," and it also says that a souped-up RS Q3 will follow close behind. This performance version of the compact crossover gets its power from a 2.5-liter turbocharged inline-five-cylinder engine shared with the Audi TT RS.

Audi plans RS3 for US

Rejoice, performance-car fans. The Audi RS3 (pictured above) is probably coming across the Atlantic. If that happens, the US-market RS3 will likely be a sedan, not the five-door body style offered in Europe. Hot hatch fans might shed a tear at this news, but we'll the RS3 any way we can get it. Audi of America CEO Scott Keogh feels the same way. "We really, really want the RS3," he said to Automotive News. "I'm very confident we'll see that car in the market. That's as far as I'm going to go. In Europe, the RS3 Sportback packs a 2.5-liter turbocharged five-cylinder with 362 horsepower and 343 pound-feet of torque mated to a seven-speed dual-clutch gearbox. That grunt get to the ground via a torque-vectoring all-wheel drive system that can route up to 100 percent of the power to the rear wheels when necessary. The sprint to 62 miles per hour goes by in just 4.3 seconds. Of course, a tiny, hardcore sedan isn't on every buyer's shopping list. For those who want a little more room with their luxury, the Q8 is also on the way. "That is absolutely a car that we will see in the United States," Keogh said to Automotive News. The big crossover shares its platform with the next Q7, but will have sleeker bodywork similar to vehicles like the BMW X6 and Mercedes-Benz GLE Coupe. The Q8 is slated to launch in 2017 with US sales following the European debut. Recent rumors suggest that a fully electric E-Tron version could be part of the lineup as well. Audi's American arm isn't as crossover crazy as some other automakers, however. According to Keogh, the tiny Q1 CUV might not come to the US because it's not the right fit for the market. Related Video: