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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.

Mercedes-Petronas AMG W04 launched to little fanfare, lots of pressure [w/video]

No indoor cocktail hour for the launch of the W04, the newest chassis built by the Mercedes AMG Petronas Formula One team. Instead, Nico Rosberg and Lewis Hamilton spent a morning in photo and video sessions at the track in Jerez, Spain then paused a moment to introduce the car. The team will want the W04 to demonstrate the World Championship credentials of the team personnel and one of the team drivers, instead of the mostly humble performances we've seen over the past three years.
The W04 has been fitted with a new five-element front wing, pushrod front and pull-rod rear suspension, a second-generation Coanda exhaust and an "aggressively packaged" rear end. A small vanity panel, à la Infiniti Red Bull's RB9, covers the stepped nose.
Team principal Ross Brawn has called it "a clear step forward in design and detail sophistication," but as much as we truly respect Brawn's abilities and achievements, we heard him say similar things about the updated W03 last year before almost every race weekend from about mid-season. We really hope he's right this time, and so does the team's newest driver, Lewis Hamilton. We'll do our best to ignore the parallels of the Mercedes F1 team having signed a sponsorship deal with Blackberry, another company trying to find its way back to the top and still struggling, and just point you to the video below of the W04 in action.

German carmakers recall 630,000 diesel vehicles in Europe

Mercedes, Opel, Porsche, and Volkswagen will recall over 630,000 cars in Europe, according to reports Friday. No diesel car has been able to get under the legal emissions limit in real-world driving, according to a German government investigation. While only Volkswagen Group has been using a specific "defeat device", other carmakers have been playing with their exhaust gas recirculation (EGR) systems. Depending of the manufacturer, the systems have been cut off at a certain temperature. In a specific test cycle the systems operate to fulfill the legal requirements, but in everyday use the limits are exceeded. According to the magazine Der Spiegel, the supplier Bosch is behind this programming and has provided it to all German automakers. The mentioned carmakers have announced recalls, but many other manufacturers are also mentioned by name in the report, including Alfa Romeo, Chevrolet, Dacia, Fiat, Ford, Hyundai, Jaguar, Jeep, Land Rover, Nissan, Renault, and Suzuki. PSA Group, which produces Peugeot, Citroen, and DS cars, declared yesterday that its offices were raided following an emissions investigation. Related Video: News Source: AutocarImage Credit: Getty Images Government/Legal Green Recalls Mercedes-Benz Porsche Volkswagen Opel Emissions Diesel Vehicles diesel emissions investigation