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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.

Pondering the 2018 Dodge Demon and 2018 Honda Accord | Autoblog Podcast #521

On this week's Autoblog Podcast, Editor-in-chief Greg Migliore is joined by Associate Editor Reese Counts and, for the first time, Senior Editor, Green, John Beltz Snyder. We discuss the new 2018 Honda Accord dropping the V6, what the Dodge Demon means for FCA's future, and if Mercedes-Benz could sell a pickup truck in the US. Spend my money (your money, everyone's money) will be back next week. The rundown is below. Remember, if you have a car-related question you'd like us to answer or you want buying advice of your very own, send a message or a voice memo to podcast at autoblog dot com. (If you record audio of a question with your phone and get it to us, you could hear your very own voice on the podcast. Neat, right?) And if you have other questions or comments, please send those too. Autoblog Podcast #521Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Topics and stories we mention Rundown 00:00:00 - Intro + Demon 00:15:48 - Accord 00:28:48 - X-Class 00:43:10 - Outro Feedback Email – Podcast at Autoblog dot com Review the show on iTunes

Mercedes driver Lewis Hamilton buys LaFerrari

Lewis Hamilton has driven some of the fastest cars ever devised, like the McLaren MP4-23 with which he won the 2008 Formula One World Championship, the Mercedes W05 with which he won the title last year, and the new W06 he drove to the checkered flag in the season opener earlier this month. But what does he drive in his spare time? According to the latest reports quoting his boss Toto Wolff, the reigning champ celebrated his win at the Australian Grand Prix by ordering a new LaFerrari. The seven-figure, 950-horsepower hybrid hypercar may be made by a rival manufacturer to the team for which he drives, but then his employers at Mercedes don't (for the time being at least) build anything that competes in the segment – unlike his former employers at McLaren that offer the similarly potent P1. Something tells us he won't be invited to drive it at Fiorano, though - which is something his rivals Fernando Alonso, Kimi Raikkonen and Sebastian Vettel have all had the chance to do. Hamilton has a long-established penchant for driving twelve-cylinder exotic supercars in his spare time. At his previous place of work, he was promised an exceedingly rare McLaren F1 LM – valued at some $4 million – but only if he won three world titles for the Woking-based team. He also owns a Pagani Zonda that was made specifically for him with a 760-horsepower engine (supplied, naturally, by Mercedes) and a six-speed manual – complete with a clutch pedal, which (apart from starting off the line) is something he doesn't usually get to operate during working hours. Related Video: