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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-Benz cut fleetwide emissions by 4.3 percent last year

Mercedes-Benz says it reduced its fleetwide vehicle emissions by 4.3 percent last year. Of course, the German automaker has another 29 percent to go to meet the European Commission's 2020 mandate. But who's counting? Mercedes' luxury and sports car bent has made it a relative laggard when it comes to increasing fleetwide fuel-efficiency, but the company did reduce emissions from 140 grams of CO2 per kilometer to 134 last year. The company's fleetwide fuel efficiency (calculated using the lenient European standard) was 5.4 liters per 100 kilometers, which equals about 44 miles per gallon and represents a 25-percent jump since 2007. Benz has come a long way from its gas-swilling V8 tanks of the 1970s. In fact, the company said its top performer, in the fuel-efficiency sense, was the diesel-powered B180 CDI BlueEfficiency Edition, which consumes 3.8 liters per 100 kilometers. That equals about 62 mpg (again, on the lenient scale). The company got some additional good press by revealing that Winfried Kretschmann, Minister-President of the German State of Baden-Wurttemberg, drives a Mercedes-Benz S300 BlueTEC Hybrid. Not exactly a Nissan Leaf, mind you, but it's a start, as is the company's efforts to bring its fleetwide emissions ever closer to the 95g CO2/km level that the EC is mandating by 2020. Take a look at Mercedes-Benz's press release below. Minister-President of the German State of Baden-Wurttemberg, Winfried Kretschmann (left), with Prof. Dr. Thomas Weber (right) and a Mercedes-Benz S-Class S 300 BlueTEC HYBRID Fleet fuel consumption for Mercedes-Benz Cars falls to 134 g CO2/km: Top efficiency figures in all vehicle classes Stuttgart, Apr 08, 2014 Benefit for the environment and customers: In almost all vehicle classes, Mercedes-Benz offers the most efficient vehicle in the competitive lineup. Moreover, in 2013 the company was able to reduce the fuel consumption and CO2 emissions[1] of the Mercedes-Benz Cars EU new vehicle fleet by a further six grams, to 134 g CO2/km. This means that in 2013, the average fleet consumption was 5.4 litres/100 km – a reduction by 24.7 percent since 2007. At present the company offers more than 50 models emitting less than 120 g CO2/km and 71 models emitting less than 130 g CO2/km. Customers can find vehicles in the Mercedes-Benz model range that consume considerably less fuel than competing models. "With our model initiative we want to be the leading premium manufacturer by 2020 again, says Prof.

Win a car while supporting a charity this holiday season

Autoblog may receive a share from purchases made via links on this page. Pricing and availability are subject to change. No donation or payment necessary to enter or win this sweepstakes. See official rules on Omaze.  The leaves have fallen, there is a crispness to the air and there have already been multiple forecasts of snow, which can only mean one thing: We're coming up on Christmas. While you've been busy thinking about what kind of gifts you're going to give your loved ones, we here at Autoblog have been deciding which dream car we'd like to see in our driveway on Christmas morning. A car for Christmas does seem a bit extreme and expensive, but thanks to these Omaze sweepstakes, it doesn't have to break the bank. Here are the current sweepstakes we'd like to win this holiday season. Win a DeLorean DMC-12 - Enter at Omaze James Riswick, West Coast Editor: Let me be clear, the DeLorean is a pretty terrible car. Its speedometer doesn't even go up to the fabled 88 mph. Seriously, look at the pictures: tops out at 85. Also, who services a DeLorean? And how much would it cost to maintain one? $AlloftheMoney or just $MostoftheMoney? So owning it could be a total headache, but at least by winning one through Omaze, you'd be relieved of the financial burden of buying one in the first place. You'd also get the chance to own one of the most iconic cars of all time, one that transcends car enthusiasm and is instantly recognizable by everyone as the "Back to the Future" car. Plus, "everyone" doesn't know that the DeLorean was actually a pretty terrible car. So, I already own James Bond's car from 1995, why not Doc Brown's from 1985? Win a 2021 Bentley Bentayga V8 - Enter at Omaze Eddie Sabatini, Production Manager: Why am I choosing a +$200K Bentley SUV? Because even if I could afford one I'd never be able to wrap my head around spending money on one. So why not try to win one by donating what I can afford to a good cause? I first saw the Bentley Bentayga up close and personal at the Frankfurt Motor Show (I forget which year but I'll never forget this SUV). And although it looks like the Bentayga Omaze is offering up doesn't have the opulent tailgate setup I fell in love with when I saw it in Frankfurt, I'd still enter to win. Win a 1968 Mercedes-Benz 280SL Pagoda - Enter at Omaze Byron Hurd, Editor: Few automotive marketing efforts stick out in my head more than the Mercedes-Benz holiday spots and magazine placements.