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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.

A luxury crossover for people who like to drive | 2018 Audi Q5 First Drive

1.6 million. That's how many Q5s Audi has sold since the model's 2008 debut, making the agreeable but stylistically neutral sport-ute the best-selling premium SUV on the planet. One in four Audis sold is a Q5, which is a big part of why the German carmaker made significant improvements intended to ensure the 2018 Audi Q5 is another success story. For starters, the Q5 has swollen in size. Not by much – we're talking 1.3 inches in length, half an inch in wheelbase, and incrementally more height – but enough to boost rear legroom by 0.39 inch and add 0.31 inch to rear headroom. If you're worried that curb weight has bloated in direct proportion to the larger footprint, fear not: The 2018 model is actually up to 198 pounds lighter than the model it replaces, thanks to a carefully modulated blend of high tensile steels and aluminum in the chassis, and incremental weight savings throughout. Two turbocharged engines are available: the Q5's 2.0-liter TFSI engine producing 252 horsepower and 273 pound-feet of torque (doing the 0-to-62-mph sprint in 6.4 seconds), and the SQ5's 3.0-liter TFSI mill that turns 354 hp and 369 lb-ft (capable of whisking it to 62 mph in 5.2 seconds). The 2.0-liter meets a new seven-speed dual-clutch S tronic transmission, while the beefier 3.0-liter gets a conventional eight-speed torque-converter-equipped gearbox to handle the higher torque. Audi's new Quattro ultra setup (already seen in the A4 and Q7) offers fully variable torque distribution that helps achieve 20/27 mpg with the 2.0-liter and 18/26 mpg for the 3.0-liter. The system can de-couple the rear axle via an electronic clutch, which improves fuel economy; with 100 percent of torque directed to the front wheels during straight-line driving, the parasitic losses of running power needlessly through the rear differential are avoided, while a second clutch controls front/rear torque distribution. Audi says the ultra setup works proactively, not reactively, using torque vectoring to distribute power and anticipating changes in vehicle dynamics 500 milliseconds before the torque is redistributed. While there are numerous tech updates under the skin, the body itself is very familiar. In person, the Q5's looks are tweaked ever-so-slightly thanks primarily to a curvier, crisper character line that is so sharp, it casts its own shadow under certain lighting conditions. Inside, a Q7-like upgrade gives the cabin a more sophisticated feel.

Audi planning S3 Plus with 375 hp?

There's a war being waged in Europe for the highest output from the smallest displacement. Alfa Romeo has managed to squeeze 240 horsepower and 260 pound-feet of torque out of a 1.7-liter turbo four for the 4C. Mercedes-Benz has coaxed 355 hp and 332 lb-ft out of a 2.0-liter turbo four to drive the new A45 AMG, CLA45 AMG and GLA45 AMG. But not to be outdone, the Volkswagen Group is said to be working on one of its own that will put both to shame.
The engine is reportedly being based on VW's existing 2.0-liter turbo four, only enhanced to produce a massive 375 hp and 369 lb-ft of torque. The key to getting there was poaching Friedrich Eichler, the engineer who designed AMG's aforementioned high-output engine, and mandating him to do still better.
That's all well and fine - and perfectly impressive - but just what does VW plan on doing with the new engine? A whole lot, according to reports. It's expected to power the new Scirocco and a new Golf R Evo expected to debut at the Beijing Motor Show in April, and you can bet it'll be slotted into another few applications as well. But the first vehicle expected to get it will be the Audi S3 Plus.