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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.

Bentley doubles down on diesels with a triple-charged Bentayga

Volkswagen Group isn't totally giving up on diesels. While its flagship VW brand is clearly tarnished, the ultra-luxury Bentley division just revealed plans for its first oil-burner, a triple-charged 4.0-liter V8 that produces 429 horsepower and 664 pound-feet of torque. If the powertrain sounds familiar, that's because it's the same one found in the Audi SQ7 TDI. It's a clever system capable of giving what Bentley claims as the world's fastest diesel SUV a top speed of 168 miles per hour and a zero-to-62 mph time of 4.8 seconds. The SQ7 TDI can get to 62 mph in the same time, but is electronically limited to 155 mph, because it wouldn't make sense if the cheaper SUV could outperform the much more expensive one. The Bentayga also emits the lowest CO2 output of any Bentley and has a range of over 621 miles on one tank. Despite having a curb weight of 5,269 pounds, Bentley claims the Bentayga can get a combined rating of 35.8 mpg on the European cycle. The Bentayga Diesel may not be as powerful or as fast as the W12-powered model, but it's a lot more fuel efficient as the latter achieves a combined rating of 21.6 mpg on the European cycle. Other than the new engine, the Bentayga diesel is nearly identical to its gasoline-powered twin except for some discreet "V8 Diesel" badges on the front doors, a new exhaust outlet design, and a black grille. A Bentley spokesperson confirmed that the Bentayga diesel would not be sold in the US. And since Bentley won't be at this year's Paris Motor Show, don't get your hopes up on spotting the vehicle there. The diesel-powered SUV will go on sale in Europe early next year, which will be followed by its release in Russia, South Africa, Australia, New Zealand, and Taiwan. Pricing for the SUV has not been announced yet. Related Video: Featured Gallery 2018 Bentley Bentayga Diesel View 20 Photos News Source: BentleyImage Credit: Bentley Green Audi Bentley SUV Diesel Vehicles Luxury Performance bentley bentayga

2015 Audi Q3

There are two ways to approach a brand-new segment in the auto industry. First, an automaker can take a gamble and introduce a completely new vehicle, catering to the specific demands of the marketplace(s) in question. In the compact, premium CUV segment, we've seen Buick do this with the Encore, and Mercedes-Benz with the GLA-Class. The other option is to introduce a vehicle already sold in another market. Considering the amount of time it takes to bring a new vehicle from paper to production, there is plenty to gain in the short-term with this approach. It's not without its downsides, though, as we found after a week behind the wheel of the 2015 Audi Q3, a vehicle that was initially launched in 2011. Cute though it may be – it was referred to at least once by a passerby during our testing as "totes adorbs" – Ingolstadt's decision to introduce a vehicle that's already been on sale for four years, and is effectively approaching the last half of its lifecycle, leaves the Q3 at a significant disadvantage relative to the newer competition. Despite crossing its first auto show stage four years ago, the Q3 remains a handsome little bugger. Audi's designs, while conservative, tend to age very well, and the compact Q3 is no exception. It's like a scaled-down Q5 in most respects, although certain design pieces, like its more aggressively raked rear window and shorter front and rear overhangs, belie the significantly smaller Q3's figure. Due to its age, the Q3 was, fortunately, designed before the current A3 hit the market. That means it avoids the unattractive, minimalist dash of the A3, opting for a more traditional Audi design, with a strip of brushed aluminum on the passenger's side, a user-friendly center stack and a suitably large nav screen front and center. While the overall layout is attractive, the material quality is not what we'd expect of a newer Audi. There's nothing that feels exceedingly cheap – the plastics just feel old and too familiar. It's difficult to describe, but as soon as you climb in the Q3, things like the switchgear for the HVAC controls immediately remind you that this is a vehicle that's been on sale since 2011. While our definition of interior quality has evolved over the years, our idea of a driver-friendly cabin has not. The Q3 scores highly in this regard, featuring the elevated seating position that makes CUVs so popular with the general public.