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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.

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

Smart brand might be doomed

Reports are painting a less than rosy picture of the Smart brand's future. The Daimler-owned carmaker is going fully electric in 2020, but that might not be enough to keep it alive for long. Inside sources, quoted by Automobile Magazine, are saying Renault is likely to pull out of the partnership that created the current Smart ForTwo/Renault Twingo pairing introduced in 2014. The two rear-engined cars share a platform, and when the current Twingo is done for, Renault might want to part ways. In addition, Mercedes isn't willing to prop up Smart on its own, and there is a possibility that the entire Smart brand could be shuttered by 2026. A previous joint venture was the ForFour hatch co-developed with Mitsubishi, and despite the ForFour name living on in the current generation rear-engined car, the earlier FWD hatchback has quickly been forgotten. Not long ago, Smart presented its Forease open-top concept to give customers a glimpse of what future Smart cars would look like, but at its heart the Forease was still a current Smart dressed up with concept car details. The next-generation Mercedes-Benz A-Class is to be signed off in 2021 for a 2025 introduction, and it can be underpinned by a more flexible, fully scalable platform that could also serve to support a new entry-level Mercedes-Benz vehicle that could render the separate Smart brand pointless. Then there's Geely, who now owns nearly 10 percent of Daimler, and who is partnering with Daimler to launch a new "premium" ride-hailing venture in China. As Geely develops its mobility solutions, it is likely to keep an eye on Smart: Smart cars have been car-sharing staples around the world for quite a while, from users such as Car2Go. Automobile Magazine says that if a Smart is co-developed with Geely, it might suit the Chinese market well, but a global business case might be challenging. In any case, if Smart wants to survive beyond the current Renault partnership, the new model should be agreed upon quickly, and it must be based on a platform flexible enough to support full electric drive. Reportedly, there are now ongoing feasibility studies for a fully electric Daimler "U-Class," which would include a Smart-like three or five-door hatch with two wheelbase options, a ride-sharing shuttle with autonomous capabilities, and an urban delivery panel van. But Smart must justify itself for the upcoming decades, or the future Daimler products that occupy its niche will be wearing a three-pointed star instead.