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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 A3 G-Tron offers big range, few emissions

Audi is exploring a variety of sustainable transportation technologies beyond the traditional diesel, hybrid, plug-in and electric options, including the compressed natural gas A3 Sportback G-Tron that debuted today at the Geneva Motor Show.
The most interesting thing about this rather innocuous-looking A3 Sportback is that when run on Audi e-gas, the car becomes completely carbon neutral, emitting no more CO2 than was chemically input in this special fuel's production. Audi has already broken ground on a new plant - powered by renewable energy, of course - that uses electrolysis to produce e-gas, which could then be made available through any natural gas distribution network.

Will Audi's e-tron SUV's range match the Tesla Model X?

Tesla may soon get some competition from across the Pond when it comes to battery-electric SUV supremacy. Volkswagen's Audi division is preparing an SUV sized between its Q5 and Q7. And the company is suggesting that the model's single-charge range may challenge that of the Model X. Audi's battery-electric SUV, which was first shown off in a concept version at the Frankfort Auto Show in 2015, may start sales as soon as next year. More importantly, the model could have a single-charge range of more than 300 miles, UK's Autocar says, citing an interview with Audi executive Dietmar Voggenreiter. Granted, that estimate is likely for Europe's more generous NEDC cycle, which would put the range at closer to 250 miles by US Environmental Protection Agency (EPA) standards. Still, 250 miles would beat the 200-mile range of the base-model Tesla Model X and would be in spitting distance of the 100D model's 295 miles. What that means for US customers - price, on-sale date, and range - is unclear. Audi spokesperson Amelia Fine-Morrison, in an e-mail to Autoblog, said it was "too soon to confirm the details," and that the automaker would disclose more information closer to the official launch date. Still, Audi has said it looks to have as much of 25 percent of its global offerings be electrified by 2025, so this will likely be a big step towards that goal. Then there's the question of how big the domestic market will be (not to mention how much the Audi SUV EV will cost). During the three months ended Dec. 31, 2016, Tesla delivered a quarterly-record 9,500 Model X vehicles, so there will obviously be high-end demand for an electric SUV from an established brand like Audi. Related Video: