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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.

A weird end to a weird F1 season | 2016 Abu Dhabi Grand Prix recap

The 2016 Formula 1 season ended with a bang that came from a direction no one expected. Lewis Hamilton put his Mercedes-AMG Petronas on pole position and then got away clean to start the race. Teammate Nico Rosberg did the next best thing, lining up in second and following right behind Hamilton for most of the race. Other than Rosberg's wicked pass on Red Bull's Max Verstappen to retake second place on Lap 20, things stayed all quiet at the front. Come Lap 32 of the 55-lap race, however, observers began to wonder why Hamilton was driving so slow. The Brit, working every trick he could think of to win the Driver's World Championship instead of just the race, dogged it out front trying to push Rosberg back into the chasing mix of Red Bulls and Ferraris. Over the next 15 laps Hamilton's race engineer repeatedly radioed ideal lap times. Hamilton only occasionally hit the times until finally saying, "I suggest you let us race." When the one-stopping Sebastian Vettel blasted his Ferrari from sixth to third, nosing up to Rosberg's gearbox, Mercedes team honcho Paddy Lowe got on the radio to instruct Hamilton to go faster. Hamilton replied that if he wasn't going to win the championship he didn't care about winning the race. Hamilton repeatedly zoomed through the first sector to keep everyone behind, then clogged up the works through Sectors 2 and 3. The problem with his plan was that the Red Bulls in fourth and fifth couldn't get close enough to threaten the trio at the front; even if Vettel had got by Rosberg, Rosberg would still win the Championship with a third-place finish. As it happened, Rosberg finished second behind the disconsolate Hamilton. Vettel took third, followed by Red Bull drivers Verstappen and Daniel Ricciardo, then the second Ferrari piloted by Kimi Raikkonen in sixth. Nico Hulkenberg took seventh, beating Force India teammate Sergio Perez for the last time as an intra-team rivalry. Felipe Massa closed his F1 career with ninth place in a Williams chassis that he got to take home as a gift from the team. Fernando Alonso scored the final point for McLaren, a touch of sweet for the team after the bitterness of Jenson Button retiring on Lap 12 with suspension damage. Rosberg's second place earned him 385 points for the season, enough to take the World Driver's Championship from Hamilton by just five points. Some have put the title down to Rosberg's consistency, others to his car's reliability.

Weekly Recap: Automakers rethink the definition of luxury

Variety is the spice of life, but it's becoming a prerequisite for luxury carmakers in the ultra-competitive US market. The Detroit Auto Show was strong evidence of this reality. It's not enough to offer attractive and well-appointed cars and SUVs anymore. Luxury brands that want to be competitive need to invest in everything from high-powered supercars to clever hybrids. To be relevant, you need to be green and mean – and everything in between. As General Motors product chief Mark Reuss said after the reveal of the 640-horsepower Cadillac CTS-V: "We are not leaving anything on the table." He was speaking for Cadillac, but he might as well have been speaking for the luxury car market. The CTS-V debuted in Detroit about an hour after Lexus surprised showgoers with the reveal of the RC F GT3 race car and then announced ambitious plans to return to competitive racing. That almost overshadowed the fact Lexus had just revealed another potent addition to its growing F line, the 467-hp GS F. View 20 Photos But for luxury brands, it's not just about maximum horsepower for well-heeled enthusiasts or decadent amenities for the Grey Poupon set. Strong competition from all corners has forced automakers to refine and expand their lineups in ways unforeseen even a few years ago. Case in point: Mercedes-Benz finally has an answer to the BMW X6, rolling out the GLE coupe in Detroit. The X6, which blends coupe-like styling cues with some of the functionality of an SUV, debuted in 2008. Back then it was a punchline, but seven years and more than 260,000 sales later, the X6's success has compelled Benz to respond. Mercedes – one of the strongest proponents of diesel technology – also debuted the C350 plug-in hybrid sedan, which promises a range of 20 miles on electricity, though fuel economy figures were not announced. The car pairs Mercedes' well-received 208-hp turbocharged four-cylinder with an electric motor for total output of 275 hp and 443 pound-feet of torque. Meanwhile, Infiniti will add the Q30 hatchback to its lineup by the end of the year, new president Roland Kruger reiterated in Detroit. It's expected to be joined by a crossover variant, and the additions will help strengthen Infiniti in the United States and abroad. "While we're expanding our product line, we're also expanding our market reach," he said. That's something echoed by Jaguar executives, who are preparing to launch the brand's first crossover, the F-Pace, in 2016.