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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.

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Vettel hopes to pull off some Ferrari 'tricks' to end Mercedes F1 dominance

MONTREAL — Sebastian Vettel says Ferrari has a few tricks up its sleeves for this weekend's Canadian Grand Prix and will need to conjure up something special if it is to end Mercedes' magical run. Six races into the season, Vettel is not ready to wave the white flag and concede the title to Mercedes, which has racked up six straight wins, five of them with 1-2 finishes. But the German admits the battle had reached a critical juncture. "The next races will be really crucial for us to try and get back to the front and give a much harder time to Mercedes," said Vettel, who finished second in Monaco last month for Ferrari's best result so far this season. "It will be crucial to do it rather sooner than later, but at the moment I am not too fussed, I am not looking at, 'OK this is the date.' "Clearly we are behind, clearly there is a big margin between Mercedes and the rest and we have to lose that gap and get ahead otherwise it will be difficult to turn around. "That is as much realism as you can get."Vettel won from pole position in Canada last year and Mercedes has suggested the high-speed circuit could again favor Italian rivals whose season has yet to get into gear. But Mercedes drivers Lewis Hamilton and Valtteri Bottas will like their chances as well on the Circuit Gilles Villeneuve. Hamilton was fastest in Friday's early practice, but damaged his car when he hit the wall in the afternoon. The five-time world champion sits 17 points clear of Bottas at the top of the standings and in his bid to equal Michael Schumacher's seven Canadian Grand Prix victories between 1994 and 2004. Not that Mercedes needed another boost, but Hamilton and Bottas will have new and upgraded engines in their cars for this weekend's race. Ferrari has already introduced its first upgraded powerplants of the season, but Vettel was optimistic tweaks to the car would benefit them on a circuit that plays to some of their strengths. "There is always little tricks you can do, the question is whether they make a difference," Vettel said. "But I am not sitting here trying to paint things black we haven't done a single lap this weekend so I am quite optimistic it was a strong track for us last year. "We have some tricks up our sleeves whether they work or not we will see.