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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.

Hollywood stars drink hydrogen B-Class F-Cell emission water in Death Valley [UPDATE]

A plug-in electric vehicle can be used to power a house during a winter storm, but if you're more worried about the heat of, say, Death Valley, then maybe you'll want a Mercedes-Benz B-Class F-Cell along. That's the message of a new video from Daimler and starring Diane Kruger (Inglourious Basterds) and Joshua Jackson (Fringe) that promotes the company's hydrogen-powered car. The gist? You can drink the tailpipe emissions. The two Hollywood stars drove in Death Vally without any water in their F-Cell but had a special tank hooked up to the tailpipe to collect the H2O drips as they drove in 100+ degree temperatures. There's a reason these two actors were chosen, since they've been driving an F-Cell in their daily lives for two years, according to the Diamler press release. The text is, shall we say, a bit hyperbolic - "Their lives rely on the emissions of the B-Class F-CELL" it says, totally ignoring the film crew that is obviously along for the ride and more than likely had a few bottles with them. Also, when the California Fuel Cell Partnership promoted the same idea a few years ago, it clarified that, "A fuel cell doesn't produce enough water to fill your glass. ... If fact, fuel cells produce about the same amount of water as gasoline vehicle – about 1/3 cup for a full day of driving." Thus, this whole thing is a Hollywood stunt, but it's a visually effective one. See for yourself in the mini-movie below. UPDATE: Daimler has told AutoblogGreen that there was no "extra Hollywood magic" needed for the water collected in the video. Instead, Madeleine Herdlitschka, who works at global communications for Mercedes-Benz Cars, said, "Considering the technical characteristics, the Mercedes-Benz B-Class F-CELL emits about 9 kg of water vapor per kg of hydrogen while driving. The vehicle has a hydrogen capacity of about 3.7 kg, what is sufficient for a max. of about 400 km of range. A tailor-made construction, designed by the production company Markenfilm Crossing in cooperation with our fuel cell experts, made it possible to collect the water in a tank - previously cooling the vapor with a specially designed pipe system." This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Ecclestone wonders if F1's upcoming turbo V6s should get augmented sound [w/videos]

While every team on the Formula One grid is worried about making a good showing in this year's championship at the same time as they develop a brand-new car for next year's championship, Bernie Ecclestone and F1 circuit promoters have a different concern: how next year's cars will sound. The current cars use 2.4-liter, naturally-aspirated V8s that can reach 18,000 revolutions per minute and employ dual exhaust, next year's engine formula calls for 1.4-liter turbocharged V6s that are capped at 15,000 rpm and are constrained to a single exhaust outlet. Ecclestone and promoters like Ron Walker believe the new engines sound like lawnmowers and that the less thrilling audio will keep people from coming to races. If Walker's Australian Grand Prix really is shelling out almost $57 million to hold the race, every ticket counts. As a fix, according to a report in Autoweek, Ecclestone "suggests that the only way to guarantee [a good sound] may be to artificially adjust the tone of the V6s."
However, neither the manufacturers nor the governing body of F1, the FIA, think there will be a problem. Ecclestone fears that if the manufacturers "don't get it right" they'll simply leave the sport, but the only three carmakers and engine builders left next year, Renault (its 2014 "power unit" is pictured), Mercedes-Benz and Ferrari are so embedded that it would stretch belief to think they'd leave the table over an audio hiccup - if said hiccup even occurs. And frankly, these issues always precede changes to engine formulas, as they did when the formula switched from V10 to V8; fans, though, are probably less focused on the engines and more on the mandated standardization of the sport and the spec-series overtones that have come with it.
No one knows yet what next year's engines will sound like, but we've assembled a few videos below to help us all start guessing. The first is an engine check on an Eighties-era John Player Special Renault with a 1.5-liter V6 turbo, after that is Ayrton Senna qualifying in 1986 in the Lotus 98T that also had a 1.5-liter V6 turbo, then you'll find a short with a manufactured range of potential V6 engine notes, and then the sound of turbocharged V6 Indycars testing last year at the Indianapolis Motor Speedway. Any, or none of them, could be Formula One's future.