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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.

Daimler, Geely mull China as production hub for hybrid powertrains

FRANKFURT — Daimler and Geely on Friday said China could emerge as a manufacturing and export hub for hybrid powertrains jointly developed for Volvo and Mercedes-Benz cars. Earlier this week, Daimler said it would cooperate with China's Geely to build next-generation combustion engines for use in hybrid vehicles. The engines will be produced in China as well as in Europe, and Geely and Daimler will cooperate in engineering, sourcing and production, the companies said in a joint press release. "The export of the engine from China is considered to be an option," the release further said. Mercedes-Benz aims for more than half of its passenger car sales to be comprised of plug-in hybrids or purely electric vehicles by 2030. Geely is ChinaÂ’s most internationally known automaker. It owns Volvo Cars and Lotus, almost half of Proton and 9.7% of Daimler. Through wholly owned company Polestar, it builds low-volume Polestar 1 hybrid performance cars in the western city of Chengdu and Polestar 2 volume sedans in Taizhou in the east. "The companies plan to develop a highly efficient modular engine," a spokesman for Daimler said, adding that it would be used in hybrid drivetrains and manufactured in Europe and China. The modular engine will be used in cars under different marques at Geely and Daimler, a person familiar with the matter said on condition of anonymity as the companies are still in the early stages of developing the engine. An Conghui, President of Geely Holding Group, President and CEO of Geely Auto Group said: “This project reflects the need for economies of scale and targeted research and development investment in clean and highly efficient powertrains and hybrid drive systems and their applications." Geely also plans to build a plant with annual manufacturing capacity of 30,000 premium EVs in the western city of Chongqing, run by a wholly owned, newly registered company, according to documents on its website. Geely and Polestar declined to comment. The plan comes as foreign automakers including BMW AG and Tesla expand EV production in the worldÂ’s biggest market, sourcing major EV components such as batteries locally and often even exporting a portion of the vehicles it builds.   Auto News Earnings/Financials Green Plants/Manufacturing Mercedes-Benz Volvo Green Automakers Future Vehicles Hybrid

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