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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-AMG GT S pit against Porsche 911 Turbo in Evo Deadly Rivals test

When Mercedes-Benz announced that its all-new AMG GT would start at $129,900 deeply undercutting the $200,000-plus of its predecessor, the SLS AMG, immediate questions focused on how it'd stack up against the latest crop of high performers that occupy the mid-$100,000 range. Evo, over in the UK, didn't have to wait all that long. The latest installment in the outlet's "Deadly Rivals" series compares the AMG GT with the latest Porsche 911 Turbo. On paper, the test is sure to be interesting. The Mercedes uses a 4.0-liter, twin-turbocharged V8 with 503 horsepower and 479 pound-feet of torque, while a seven-speed AMG Speedshift dual-clutch shuffles power to the back axle. The 911 Turbo's formula is more of a known quantity – 520 hp from a twin-turbo, 3.8-liter flat six with the company's own PDK working in unison with all-wheel drive, torque vectoring and rear-axle steering. Of course, we're not going to spoil the results for you. Take a look at the video up top, and let us know what you think of Evo's latest track battle.

Race Recap: 2015 US Grand Prix was wet, wild, and historic

Hurricane Patricia made landfall in Mexico this weekend, and made her presence known throughout the South. For two of the three days of the grand prix weekend it rained non-stop in Austin, so badly on Saturday that qualifying had to be postponed until Sunday morning, and then it only stayed dry enough to conduct the first two sessions. At the end of a tricky, slippery Q2 Nico Rosberg had put his Mercedes-AMG Petronas on the front row, one tenth ahead of teammate Lewis Hamilton. The German had done the best he could to keep his hair-thin chances of a World Championship fight alive. Daniel Ricciardo lined his Infiniti Red Bull Racing chassis in third ahead of teammate Daniil Kvyat, both drivers having moved up a place because Ferrari driver Sebastian Vettel took a ten-spot grid penalty for using a fifth engine and dropped to 13th. Continuing the two-up theme, Sergio Perez and Nico Hulkenberg were fifth and sixth for Force India. After that came variety: Felipe Massa in seventh for Williams, Max Verstappen for Toro Rosso in eighth, Fernando Alonso looking good in the rain for McLaren in ninth, and Romain Grosjean for Lotus in tenth. When the lights went out, Turn 1 set the tone. Pole position is on the outside line at Circuit of the Americas, and Hamilton had got himself far enough under Rosberg by the time the two got up the hill that Rosberg had to stick to the outside through the corner. At the corner exit Hamilton used the entire track, pushing Rosberg wide, their cars touching. As Rosberg left the track and dropped back to fourth, Hamilton radioed to the team to say the contact was unintentional. The two Mercedes' and two Red Bulls animated the front. Rosberg passed Ricciardo at the end of a Virtual Safety Car period employed to let the marshals clean the debris at Turn 1. Kvyat started chasing down Hamilton until the Russian ran wide and let Rosberg and Ricciardo through, then Rosberg ran wide on the next lap to let Ricciardo through. On Lap 15, Ricciardo passed Hamilton through the esses to take the lead. After the first round of pit stops the Aussie still had the lead, followed by Rosberg, Kvyat, Hamilton, and Vettel. Then Rosberg got around to take the lead and Vettel closed in on Hamilton as the Brit duked it out with the Russian. Rosberg showed excellent speed, building up a nine-second gap on Ricciardo, but a Safety Car period erased that when Marcus Ericsson had to park his dead Sauber on the inside of the track after Turn 10.