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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.

2013 Airstream Interstate 3500 EXT

LA To The Grand Canyon In The Mercedes-Benz Of RVs
Piloting an 8,500-pound motorized house down the highway is far from my idea of fun, yet inexplicably, I'm enjoying myself. My grin has nothing to do with my camper's handling, as this heavily accoutered Mercedes-Benz Sprinter drives like a 25-foot long breadbox. My smile has nothing to do with on-road stability, as the ten-foot-tall, slab-sided vehicle reacts to wind gusts like the vertical stabilizer on a Boeing jet. My delight has nothing to do with its throttle or braking response, either, as both are as numb as your forehead after the eighth beer.
This monstrosity makes me happy for one reason - my passengers are undeniably having a good time.

Daimler names Bernd Pischetsrieder to supervisory board

Some executives in the automotive industry stay with one company for their entire careers, while others bounce from one to the other, often leaving their indelible mark on each automaker at which they serve. Bob Lutz is certainly an example of the latter. So is Lee Iacocca, having presided over Ford and later charing the Chrysler board. Carlos Tavares was chief operating officer of Renault before being nominated as chief executive at PSA Peugeot Citroën. But as far as the Germans go, nobody's jumped from the leadership of one automaker to the next quite like Bernd Pischetsrieder - especially now that he's been named to the supervisory board of Mercedes-Benz parent company Daimler.
An engineer by training, Pischetsrieder started his career at BMW in 1973, eventually rising to the office of CEO after twenty years. There he remained until 1999, only to be dismissed after orchestrating BMW's takeover of the Rover Group (of which only the Mini brand remains in the company's portfolio, the other brands having been sold off after his dismissal).
The next year he was named chairman of Volkswagen's Seat brand, and rose to the chairmanship of the entire Volkswagen Group two years later. Despite a largely successful four-year tenure (that gave birth, incidentally, to the Bugatti Veyron), disagreements with supervisory board chairman Ferdinand Piëch saw him leave the helm at VW AG, focusing his attention on the Scania truck division. He's since been touted as a potential chief executive for Opel and for Continental, but neither potential was apparently realized.