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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.

Nissan edges out Tesla for most ZEV credits sold in California

When it comes to California zero-emissions vehicle (ZEV) credits last year, Nissan was selling and Mercedes-Benz was buying. The California Air Resources Board (CARB) put out its ZEV-credits numbers for the year that ended September 30, which is why we now know that Nissan, maker of the battery-electric Leaf, transferred 663.6 ZEV credits out of its account last year. That just edged out the 650.195 credits that Tesla sold. Chrysler's Fiat affiliate was a distant third, but its limited-production Fiat 500E was still able to generate some ZEV credits and then transfer out 235.2 of them. We don't know how much the buyers paid for these credits, since those details are kept private. It's an ever-changing rulebook over at CARB, anyway. On the flip side, Mercedes-Benz had to buy 663.6 ZEV credits in order to comply with clean vehicle-sales mandates in the most populous US state, indicative of the German automaker's gas-guzzling tendencies. Honda has cars that get better fuel economy than your average Benz, but its plug-in vehicles represent just a fraction of total sales and so it had to shell out for 542.5 ZEV credits. Chrysler-Fiat basically tread water, since the 237.8 ZEV credits it required for compliance canceled out gains on the other side of the ledger. Those Dodge Ram pickup trucks don't exactly help matters. Last year, Tesla sold the most ZEV credits while GM purchased the most. Overall, Californians bought about 3.5 million vehicles for the year that ended September 30, including 38,000 battery-electric vehicles, 30,000 plug-in hybrids and 570,000 conventional hybrids. The longstanding ZEV program means that California now has more than 100,000 ZEVs on its roads. Read this for more details on ZEV credit transfers in California. Featured Gallery 2013 Nissan Leaf View 55 Photos News Source: California Air Resources Board via Green Car Congress Government/Legal Green Mercedes-Benz Nissan Tesla Electric California zev credits

F1's Sebastian Vettel, Lewis Hamilton face off again in Austria

SPIELBERG, Austria - Sebastian Vettel celebrated his 30th birthday on Monday, but it can be safely assumed that Lewis Hamilton will not be bringing any gifts to Austria this weekend. After the "road rage" of Azerbaijan two weeks ago, the Formula One title rivals head to the bucolic surroundings of the scenic Red Bull Ring and its backdrop of hills and forests, with controversy still simmering. Vettel, Ferrari's championship leader, had risked a heavy penalty for his moment of madness in driving into Hamilton's Mercedes behind the safety car in Baku but instead the German arrives in Austria with no further sanction and the matter officially closed. Vettel has had to accept full responsibility, and apologize to Hamilton, and will have to stay on best behavior with a race ban looming if he collects any more penalty points on his license this weekend. The FIA said Monday's meeting was attended by top officials including race director Charlie Whiting and safety director Laurent Mekies. "Following detailed discussion and further examination of video and data evidence related to the incident, Sebastian Vettel admitted full responsibility," the FIA said. "In the heat of the action I then overreacted, and therefore I want to apologize to Lewis directly, as well as to all the people who were watching the race. I realize that I was not setting a good example." A formal apology was published on Vettel's personal website. "During the re-start lap, I got surprised by Lewis and ran into the back of his car. With hindsight, I don't believe he had any bad intentions," he said. "In the heat of the action I then overreacted, and therefore I want to apologize to Lewis directly, as well as to all the people who were watching the race. I realize that I was not setting a good example. "I love this sport and I am determined to represent it in a way that can be an example for future generations." But the incident, the sport's major talking point post-Baku, is unlikely to die down immediately even if Mercedes say they have moved on. Hamilton, for one, has said nothing. But he has kept social media buzzing with news he had "liked" a fan's supportive post on Instagram that said the Paris decision had sent the message that "you can do whatever you want on track, smash into each other but if you suck up and just apologize and you get away with it." Hamilton is now 14 points behind Vettel after eight of 20 races, with a loose headrest costing the Briton victory in Azerbaijan.