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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 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.

VW brands excluded from Wards 10 Best Engines for 2016

You definitely won't be seeing a powerplant from Volkswagen or Audi on the 2016 Ward's 10 Best Engines list. In a serious rebuke against them, WardsAuto is excluding all VW/Audi powertrains for at least this year after the German automakers' ongoing emissions regulations evasions. There's no guarantee of the companies returning for 2017, either. In a story on its website, WardsAuto executive editor Tom Murphy writes that the ban lasts "until we are convinced the culture of deceit has been purged, fines have been paid and regulators are satisfied." That could be a while, the way things are looking. The exclusion knocks three powertrains out of the running for this year's list. As a winner last year, WardsAuto would usually test VW's 1.8-liter turbocharged four-cylinder again for 2016. Plus, it planned to check out the 2.0-liter turbocharged four-cylinder from the Audi A6 and the plug-in hybrid from the A3 Sportback E-Tron. In the story, Murphy finds VW's actions particularly despicable because of what they could be doing to the popularity of diesel passenger cars in this country. "BMW, Mercedes-Benz, General Motors, and Fiat Chrysler also sell light-duty diesel engines in the US, but their sales outlook suddenly has grown murky, thanks to VW's shenanigans," he writes. So far, Jaguar Land Rover is remaining confident of US consumers continuing to buy diesel models, though. We'll be able to see the real effects of VW and Audi's ban in a few months because the 2016 Ward's 10 Best Engines will be published December 10. With two major automakers out of the running, their rivals will likely greet this as a better chance to make the grade.