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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.

Recharge Wrap-up: Mercedes B-Class Electric Drive is a rock star, FedEx tests electric trucks

The Mercedes-Benz B-Class Electric Drive is in a new music video for I Lived by OneRepublic. The band's singer, Ryan Tedder, has also been brought on as a brand ambassador for the German automaker. OneRepublic will also be performing the song at the Mercedes-Benz Media Night on the eve of the Paris Motor Show. No word if Mercedes plans to offer hordes of screaming teenage fans as an option package with the B-Class Electric Drive. See the video (the car shows up around the four-minute mark) or read more in the press release below. FedEx is testing converted electric delivery trucks with diesel range extenders. Looking to shrink its carbon footprint, the company has converted a handful of trucks as part of a pilot program. In addition to battery packs, each truck is equipped with diesel turbine generators (supplied by Ian Wright's company, Wrightspeed) to provide electricity when the battery is depleted. Because the diesel motors aren't powering the vehicle directly, they can continuously run at their most efficient speed, making the trucks about twice as efficient as those powered by traditional means. Read more at Wired. Ford's new aluminum-bodied F-150 will be 5 to 20 percent more efficient, the company says. The fuel economy gains depend on the particular version of the truck, but the biggest improvement will likely come from the 3.5-liter V6 and the 2.7-liter EcoBoost V-6. Automotive News predicts the F-150 SFE to be rated at 21 mpg city/28 highway/23 combined, which are identical figures to the Ram 1500 EcoDiesel. The result could be a noteworthy fuel economy battle between Ford and Ram trucks. Learn more at Automotive News. The US Department of Energy is providing $25 million in funding toward reducing the price of algal biofuels. The goal is to get the price of these renewable fuels below $5 per gasoline gallon equivalent (gge) by 2019, and less than $3 per gge by 2030. The money will fund projects to develop better algal cultures that produce biofuel and other useful bioproducts, and projects to boost biomass productivity. The DOE says it wants to help develop a "bioeconomy" that provides jobs, helps the environment and ensures energy security. Read more at Energy.gov. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Mercedes says it's tops in luxury sales for 2012, not BMW

It turns out that Mercedes-Benz North America has legitimate claim to being the top selling luxury nameplate in the US in 2012.
While sources such as Autodata had put BMW in the top spot, registration data from R.L. Polk shows that Mercedes customers registering new vehicles topped the Bavarian automaker in the most recent calendar year. Polk says Benz posted 274,123 registrations, compared with BMW's 268,498.
In terms of sales posted, BMW had bested Benz 281,460 to 274,134. But sales are recorded somewhat inconsistently from automaker to automaker. Some book the sales as soon as they are shipped from factory to dealer. There is perennial gamesmanship between the two German rivals, and the sales numbers suggest that BMW pushed out some extra sheetmetal to dealers in the last four weeks of the year.