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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 may be working on a new electric car dubbed 'Ecoluxe'

Automobile has a lengthy piece this month on how the four German mass-market luxury manufacturers each plan to go after Tesla with their own electric vehicles. It was written by Georg Kacher, the magazine's European bureau chief, and the English version came a month after he wrote the German-language original for Autobild. Tesla isn't exactly a threat to the Germans, but, according to the report, the Model S is planting the right kinds of seeds in niches that are important to the luxury players. The thinking is that - in addition to needed electric vehicles anyway for stricter US regulations - it's better to start designing the machinery now. The article posited Porsche's attack would rest on the coming Panamera platform, but a big hurdle would be battery placement. Unable to find one large space for a lithium-ion pack, engineers would instead put batteries everywhere they could, for a supposed tally of some "108 battery pouches" throughout the body. A few days after the Automobile piece, however, Porsche publicly said it had no intention of challenging the Model S, because the enthusiastic driving the brand is known for doesn't jive with useful range. In Kacher's retelling, Mercedes' plans are even more ambitious, supposedly taking aim at the Model S and the coming Model X. It would do this with an investment in excess of $2 billion in a program called "Ecoluxe" – Mercedes has no brand division akin to BMW's i and Audi's e-tron. The new brand would create a four-strong family of bespoke electric vehicles: a smaller platform with a wheelbase around 106 inches and a larger one with a wheelbase around 118 inches. In addition, the range would have "provisions for rear-wheel drive, all-wheel drive, and rear-wheel steering." The numbers are impressive: seating for seven in the larger vehicles, both longer than 16 feet, front and rear storage areas, ratings of up to 610 horsepower and production capacity of 80,000 units per year. When would we see such creatures? Perhaps as soon as 2019. We do know that if Tesla can knock the Model X over the outfield fence, automakers are going to have to do something. We don't know what the chances are that Ecoluxe is Mercedes' first move - but such a plan could help explain the weird Mercedes concept spied in October.

Editors' Choice: Top Five 2015 Frankfurt Motor Show Debuts

Consider the 2015-16 auto show season officially kicked off. The Frankfurt Motor Show offered a great look at the newest crop of production cars and conceptual machines, and brought some old favorites back into the spotlight for a closer look. (The Alfa Romeo Giulia, for example, debuted in June, but this was the first time most of us saw it.) Now that the dust has settled and we're all on flights back to the US, our editors cast their votes for their personal favorites from the Frankfurt show. These are the cars we truly loved seeing the most. But unlike other shows, there was no one runaway winner – all of the Top Five received positive praise from our team. We won't spoil the results, though. Scroll down to see what we liked most from this year's Frankfurt expo. 5th Place – MERCEDES-BENZ IAA CONCEPT View 12 Photos MIKE AUSTIN: The clean lines on this concept have me excited for a more elegant beauty to future Mercedes-Benz vehicles. Next to the Concept IAA, the lovely S-Class Coupe looks like an overstyled barge. DAVID GLUCKMAN: Yeah, the extendable rear is neat and all, but I'm more interested in the front-end styling of this one. It looks like the Tron version of a 300SL, in a good way. I'm hopeful it portends the future of Mercedes design. STEVEN EWING: I was super impressed when Mercedes said that, with the rear end extended, this concept has a drag coefficient of just 0.19. That's crazy aerodynamic. I'm not head-over-heels about the styling, but I think the lessons learned from this concept are really important, and will play a huge role in the future of Mercedes' products. 4th Place – ALFA ROMEO GIULIA View 15 Photos SEYTH MIERSMA: I can hardly express how in love with this car I am. The styling feels creative, modern, and evocative, without going over the top. The proposed performance is spectacular. And the Alfa badge speaks to a legacy of romantic motoring. DAVID GLUCKMAN: Pretty Italian car makes big promises and will probably deliver on about three quarters of them. I think that will still be enough for me. JEREMY KORZENIEWSKI: I'm really intrigued by the Giulia. It looks great, sounds awesome, and I'm expecting it to have a load more character than its German rivals. I hope I'm not disappointed. 3rd Place – JAGUAR F-PACE View 15 Photos GREG MIGLIORE: It's the first SUV for Jaguar, and I think they nailed the design, capability, and electronics. It's the right car at the right time.