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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 RS Q3 gets snarlier, hits 62 mph in 4.8 seconds [w/video]

Well, that was quick. A mere 20 months after its debut at the 2013 Geneva Motor Show, Audi has issued a fairly significant update to its RS Q3 crossover. A light exterior refresh - the most noticeable change is that the grille surround and headlights are now joined - belies more significant changes under the compact crossover's hood.
Power from the 2.5-liter, turbocharged five-cylinder has been boosted nicely from 310 horsepower to 340, while torque has jumped from 309 pound-feet to 332 lb-ft. The result of this extra thrust is that the tiny CUV can now scamper to 62 miles per hour in a seriously quick 4.8 seconds, rather than the original RS Q3's 5.5-second sprint. A new fifth-generation multi-plate clutch is fitted to the seven-speed S-tronic dual-clutch transmission, which Audi claims will now deliver even quicker shifts.
Lighter brake rotors with ridiculous eight-piston calipers in the front provide what we imagine is a lot of stopping power, while Audi continues to offer an optional adaptive damper system. 19-inch wheels are standard while 20s are optional.

Audi builds 3-millionth A3

About a month after Volkswagen celebrated building its 30-millionth example of the Golf, Audi has announced that it has produced three million versions of its small hatchback, the closely related Audi A3. Probably more surprising than the fact that the A3 has moved in such big numbers since its global debut in 1996 is the fact that it has done so with relatively little support in the US, seeing marginal sales in the States since 2005.
The three-millionth A3 was a Sportback TDI model, but the lineup has grown this year to include a new sedan and S3 model, and the hybrid A3 E-tron is on the way. With these new models - especially the sedan in the US - we expect the A3 to continue to be a popular entrant in the premium small segment. Scroll down for Audi's official press release.