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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.

Trump calls Germans 'very bad,' vows to stop their car sales in US

TAORMINA, Italy -Talks between President Trump and other leaders of the world's rich nations at the G7 summit on Friday were expected to be "robust" and "challenging" after he had lambasted NATO allies and condemned Germans as "very bad" for their trade policies. Trump's confrontational remarks in Brussels, on the eve of the two-day summit in the Mediterranean resort town of Taormina, cast a pall over a meeting at which America's partners had hoped to coax him into softening his stances on trade and climate change. According to German media reports, Trump condemned Germany as "very bad" for its trade policies in a meeting with European Commission President Jean-Claude Juncker, signaling he might take steps to limit sales of German cars in the United States. "The Germans are bad, very bad," he reportedly told Juncker. "Look at the millions of cars that they're selling in the USA. Horrible. We're gonna stop that." White House economic adviser Gary Cohn on Friday confirmed the reports. "He said they're very bad on trade, but he doesn't have a problem with Germany." Cohn said Trump had pointed out during the meeting that his father had German roots in order to underscore the message that he had nothing against the German people. Trump's spokesman Sean Spicer said Trump had "tremendous respect" for Germany and had only complained about unfair trade practices in the meeting. Juncker called the reports in Spiegel Online and Sueddeutsche Zeitung exaggerated. The reports translated "bad" with the German word "boese," which can also mean "evil," leading to confusion when English-language media translated the German reports back into English. "The record has to be set straight," Juncker said, noting that the translation issue had exaggerated the seriousness of what Trump had said. "It's not true that the president took an aggressive approach when it came to the German trade surplus." "He said, like others have, that (the United States) has a problem with the German surplus. So he was not aggressive at all," Juncker added. In January, Trump threatened to slap a 35 percent tax on German auto imports. "If you want to build cars in the world, then I wish you all the best. You can build cars for the United States, but for every car that comes to the USA, you will pay 35 percent tax," he said. "I would tell BMW that if you are building a factory in Mexico and plan to sell cars to the USA, without a 35 percent tax, then you can forget that." Last year, the U.S.

Test drive the Mercedes SLS AMG Electric Drive with Chris Harris

It's hard to not like the Mercedes-Benz SLS AMG GT. The all-aluminum coupe is fitted with a wonderful naturally aspirated 6.2-liter V8 delivering 583 horsepower and 479 pound-feet of torque. Not only does the burly combustion engine launch the two-seater to 60 miles per hour in less than four seconds, but it does so with one of the world's greatest exhaust soundtracks as it roars, burbles and cackles down the road.
But what happens when Mercedes-Benz takes away the V8 and its accompanying fire-burning song? Stripped of one of its most appealing assets, does the SLS lose its soul?
Chris Harris recently had the opportunity to take the Mercedes-Benz SLS AMG Electric Drive for a track spin in Europe. Sans gasoline, but with four electric motors providing a combined 740 horsepower (737 pound-feet of torque), all-electric all-wheel drive coupe uses sophisticated torque vectoring and a multi-mode operating system to put oversteer - drifting! - back into the equation. Fun? You bet. See for yourself, below.