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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.

Singer Porsche, Koenigsegg, NSX: Leno's life doesn't suck

Jay Leno had quite a productive trip this year during Monterey Car Week. Not only did he get to pal around with Ian Callum and check out the Pebble Beach Concours d'Elegance, but the denim-clad comedian also headed to The Quail to talk to some prominent figures in the modern sports car scene. Capping off the fun, he got to take a drive in a Mercedes-AMG GT S, too Perhaps the highlight of this show is a nearly 10-minute interview with Christian von Koenigsegg. The founder of the Swedish hypercar company digs deep into the Agera One:1's engineering details, relating interesting facts about the aerodynamics and transmission. In addition, Leno chats with Rob Dickenson of Singer about its newly reimagined Porsche 911 Targa, and he gets the latest scoop on the Acura NSX's progress from newly promoted Acura Vice President and General Manager Jon Ikeda. If you like hearing about the nuts and bolts of sports car development, then this video can't be missed. Of course, we were there at Monterey, too, and we pointed our own cameras at some of the amazing machinery, both vintage and modern, at all the various car-focused events of the week. Take a look back at some of our own cool footage in the videos below. Related Video:

The cars of notorious dictators

It's good to be the king, at least until your people have had enough of you. Last week, we brought you famous presidential cars. This week, we're going to the opposite end of the political spectrum, looking at what history's mad men drove throughout their repressive and violent regimes. These dictators were absolutely powerful, and absolutely corrupt. More nightmares for their people than rulers, their iron-fisted control gave them the ability to satisfy any wild desire with nearly limitless funds. While they all splurged on luxury goods, cars were a particular passion of many dictators. Cars make a powerful statement to the public about wealth, status and control. It's how you are presented at ground level to your adoring masses or mortal enemies. A custom luxury car with plenty of armor plating reinforced the specialness and "otherness" of the ruler to friend and foe alike. Muammar Gaddafi, Libya, 1969 - 2011 Lybia's President for Life Muammar Gaddafi fancied himself not just a car enthusiast, but a car designer for the masses as well. He supposedly designed a car called the "Saroukh el-Jamahiriya" or Libyan Rocket. It had a 230-horsepower V6 and the nose and tail of a rocket. He was trying to produce a safer car. What makes it safe car? Tough to say. Not a lot was ever released it. Apparently the el-Jamahiriya did come with airbags and collapsible fenders in case of a collision. A spokesperson said "The invention of the safest car in the world is proof that the Libyan revolution is built on the happiness of man." We'll just have to take his word for it. When he wasn't designing his own cars, Gaddafi was ordering up custom rides, large and small. Besides a heavily armored BMW 7 Series and a Mercedes S-Class stretch limo, Gaddafi had this custom Fiat built at a cost of $260,000. The gold in the trim is real gold (of course) and comes with some touches that are pure Gaddafi. For instance, the Fiat badge was replaced with an outline of the continent of Africa, with Libya cut out in green. Rebels seized the Fiat and Gaddafi's other trappings of power after putting an end to Gaddafi's 42 years in control. Jean-Claude "Baby Doc" Duvalier, Haiti, 1971 - 1986 Jean-Claude "Baby Doc" Duvalier was the second-generation dictator of Hati from 1971 to 1986. He made life hell for his people for 15 long years, starting when his father died when he was just 19 years old. Imagine if Justin Beiber was given a tiny island nation to run.