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Mercedes-Benz engines with 48-volt systems coming in 2017

As part of a big green push announced yesterday, Mercedes-Benz is jumping into the world of 48-volt power. The company will launch a new family of efficient gasoline engines next year and will begin rolling out 48-volt systems with it, likely in its more expensive cars first. Mercedes will use the 48-volt systems to power mild-hybrid functions like energy recuperation (commonly called brake regeneration), engine stop-start, electric boost, and even moving a car from a stop on electric power alone. These features will be enabled through either an integrated starter-generator (Mercedes abbreviates it ISG) or a belt-driven generator (RSG). (RSG is from the German word for belt-driven generator, Riemenstartergeneratoren. That's your language lesson for the day.) Mercedes didn't offer many other details on the new family of engines. There are 48-volt systems already in production; Audi's three-compressor SQ7 engine uses an electric supercharger run by a 48-volt system, and there's a new SQ5 diesel on the horizon that will use a similar setup with the medium-voltage system. Electric superchargers require a lot of juice, which can be fed by either a supercapacitor or batteries in a 48-volt system. Why 48-volt Matters: Current hybrid and battery-electric vehicles make use of very high voltages in their batteries, motors, and the wiring that connects them, usually around 200 to 600 volts. The high voltage gives them enough power to move a big vehicle, but it also creates safety issues. The way to mitigate those safety issues is with added equipment, and that increases both cost and weight. You can see where this is going. By switching to a 48-volt system, the high-voltage issues go away and the electrical architecture benefits from four times the voltage of a normal vehicle system and uses the same current, providing four times the power. The electrical architecture will cost more than a 12-volt system but less than the complex and more dangerous systems in current electrified vehicles. The added cost makes sense now because automakers are running out of ways to wisely spend money for efficiency gains. Cars can retain a cheaper 12-volt battery for lower-power accessories and run the high-draw systems on the 48-volt circuit. The industry is moving toward 48-volt power, with the SAE working on a standard for the systems and Delphi claiming a 10-percent increase in fuel economy for cars that make the switch.

Petrolicious shows Mercedes 280SL as architecture in motion

While still an absolute beauty today, the design of the pagoda-roof W113 Mercedes-Benz SL was revolutionary when it debuted. Moving away from the soft curves of the previous SL models, the all-new generation brought an upright, angular shape that was as much architectural as automotive. In the latest video from Petrolicious, owner and architect Daniel Monti expounds on the inspiration that he gets from his 1969 280SL's fantastic styling. The roof is the most famous design feature of this generation of SL. Look at the top from the front or back, and you can see a gentle, downward arc that evokes the look of a pagoda. That one styling element is also a fabulous counterpoint to a vehicle that is largely more angular than curvaceous. Petrolicious wonderfully illustrates how some of the SL's form-follows-function design aesthetic can be found in the architect's work in this video's heaping helping of mid-century modern goodness.

European jury picks finalists for 2015 Car of the Year

There are countless Car of the Year awards handed out each year, and naturally, Europe has its own way of doing things. Every year, a panel of jurists representing seven publications in seven different languages and seven different countries get together to name their joint Car of the Year. The panel released a list of 32 candidates back in July, and it has now whittled that list down to seven nominees. The list consists of the BMW 2 Series Active Tourer, the Citroen C4 Cactus (shown), the Ford Mondeo, the Mercedes-Benz C-Class, the Nissan Qashqai, the Renault Twingo and the Volkswagen Passat. Of those seven, only two are available in the US – those being the Mondeo (sold Stateside as the Fusion) and the C-Class. The Passat is an entirely different model in North America, the Qashqai isn't offered here, Citroen and Renault don't even participate in our market and the BMW 2 Series is represented here only by the completely different coupe and convertible. Expect the one and only recipient of the 2015 Car of the Year award to be announced at the Geneva Motor Show this coming March, and while you're waiting, you can place your guesses for the eventual winner in Comments. Featured Gallery 2015 European Car of the Year: Nominees News Source: CaroftheYear.org BMW Ford Mercedes-Benz Nissan Volkswagen Citroen Renault car of the year nissan qashqai citroen c4 cactus bmw 2 series active tourer