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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.

2014 Audi A3 Cabriolet cleans up the Messe [w/video]

If we're being honest, the outgoing Audi A3 Cabriolet never really flicked our Bic. That was just fine, of course, because Audi never brought it to North America. This new model, however, might have a different future.
And while Audi has yet to officially decide on this car's North American future, this Frankfurt Motor Show debut clearly has a better sense of proportion and aggression to it, and we're excited about its powertrain solutions, too. For the European market, Audi is promising TFSI gasoline engines in either 1.4- or 1.8-liters, along with a 2.0-liter TDI diesel, all being available in front- and all-wheel drive. Audi has also confirmed its first-ever S3 Quattro Cabriolet, which figures to combine a quick 18-second top drop and its hard-hatted sibling's even quicker 296-hp 2.0-liter turbo.
Even though Audi has been better about bringing its high-performance models to North America and has a new emphasis on growing its A3 business in our territories (including a US-minded sedan bodystyle), we would still be a bit surprised to see an S3 Cabriolet popping its entry-level top in dealers in a couple years' time. Having said that, we do think this A3 Cabriolet is almost a lock. Be sure to take a good, long look at our gallery, video and the official press release below.

Recharge Wrap-up: Atieva making EV with former Tesla talent, Holland lowers PHEV incentives

A reduction of tax incentives on company cars in Holland is expected to put the brakes on plug-in hybrid sales. Cars are taxed at an average of 25 percent, with plug-in hybrids taxed at just seven or 14 percent, depending on emissions. Taxes on PHEV company cars will increase to 14 and 21 percent. With company car leases making up a third of vehicle sales in 2014, the uptake on PHEVs "will likely go back to regular volumes," according to Volvo's Christiaan Krouwel. It could be a boon for battery electric cars, as their tax rate will remain at four percent for company cars. Read more at Automotive News Europe. Ford is testing cylinder deactivation in its 1.0-liter EcoBoost engine. On-road prototype testing has shown improvements in fuel economy of as much as six percent. Ford engineers developed a system using a new dual mass flywheel, pendulum absorber, and tuned clutch disc to allow cylinder deactivation under a wider range of speed and engine loads with less NVH. "The highest priority in the development of new combustion engines for automotive applications is the ongoing reduction of fuel consumption," says Ford's Andreas Schamel, presenting Ford's findings to the Vienna Motor Symposium. Read more at Green Car Congress or in the press release from Ford. Atieva is building an EV with the help of numerous former Tesla employees. The Silicon Valley-based startup was founded in 2007 by a former Tesla vice president, and its roster includes 12 other former Tesla employees. Already well funded, Atieva is now looking to fill its ranks with more talent, with 32 engineering positions, two recruiter positions and other job openings posted at its website. As for the EV it is working on, Atieva says it is "redefining what a car can be, by building an iconic new vehicle from the ground up." Read more at Charged EVs. Testing shows that Joule ethanol, made from recycled CO2, meets standards for use in the US and Europe. In partnership with Audi, Joule has been working toward making its recycled CO2 fuels ready for commercialization. "We are pleased to achieve another critical step towards our planned near-term delivery of fuel-grade ethanol from recycled CO2," says Joule President and CEO Serge Tchuruk. "Using waste CO2 as a feedstock, our technology has the two-fold advantage of reducing greenhouse gas emissions and producing cost-competitive, drop-in fuels." Joule will use these test results to get government approval for the use of its ethanol in highway fuel.