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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.

Eight Mercedes Fuso Canter E-Cell trucks now in service

Portugal is far better known for its scenery and seascapes (not to mention some of its alcoholic beverages) than its place as a vehicle-testing center. But the European country is serving just that purpose for Daimler's Mercedes-Benz division and a new line of trucks. And they are of the battery-electric variety. Daimler has sent eight of its Mercedes-Benz Fuso Canter E-Cell battery-electric trucks for customer-trial purposes to various parts of the Western European country. And these customers include the Portuguese cities of Lisbon, Porto and Abrantes as well as delivery company Transporta. These entities will be testing trucks that have about a 60-mile single-charge range and deliver 150 horsepower. The trials for the trucks, which have 14-foot beds, will last one year. Daimler hasn't released a whole lot of details on further development or sales possibilities of the model. The hybrid version of the Fuso Canter debuted in the fall of 2009 and was under the Mitsubishi badge at the time, even though it was 85-percent owned by Daimler. That model is said to boost fuel economy relative to conventionally-powered trucks by as much as 23 percent. Take a look at Daimler's press release on the Fuso Canter E-Cell and its Portugal testing below. Zero emission and quiet as a whisper: eight new Fuso Canter E-Cell in customer trials Eight Fuso Canter E-Cell in real-life testing with customers for a year Locally emission-free and virtually noiseless Powerful, high-torque electric motor Battery capacity ensures range of more than 100 km Highlight of anniversary year for the Canter assembly plant in Tramagal, Portugal The drive system to suit: Canter Euro VI, Canter Eco Hybrid and Canter E-Cell The cleanest technology, whatever the application: Fuso is a pioneer of "green" drive systems in the commercial vehicle sector. The Daimler subsidiary in Japan is the home of Daimler Trucks' centre of competence for hybrid technology, and with this experience behind it, Fuso has also been responsible for developing the new battery-electric-powered "Zero Emission" Canter E-Cell. The first all-electric light-duty truck, produced in a small series, runs emission-free and almost silently. The Canter E-Cell for Europe is manufactured at the Tramagal plant in Portugal. Eight vehicles have now been released for customer trials.

Comparison test: 2019 Acura RDX vs. compact luxury SUV competitors

Truth be told, if we were to compare the all-new 2019 Acura RDX with those compact luxury crossover SUVs it would most likely be cross-shopped against, you'd be looking at a different list. Even Acura admits that Lexus and Infiniti are the most likely bogies, but with the 2019 RDX, Honda's luxury brand is attempting to attract those customers who think as much with their hearts as with their heads. And for the most part, those folks have been buying from German brands: the Audi Q5, BMW X3 and Mercedes-Benz GLC-Class. So, to show how the new RDX compares to them, Acura actually provided examples of each during the recent press drive along with a Volvo XC60. All were determined to have greater emotional appeal than the last RDX, and we would certainly agree. For, as much as the previous-generation RDX made sense on paper, it was really hard to get excited about it. And when you're paying extra for a luxury vehicle, shouldn't you get a little excited? Well, as luck would have it, Consumer Editor Jeremy Korzeniewski and I were on hand in Whistler, British Columbia, for the press launch. We didn't have an abundance of time in each RDX competitor, but in conjunction with our usual comparison chart, our impressions should provide a good first taste of how the new RDX compares. Performance and fuel economy Contributing Editor James Riswick: On paper at least, the RDX is gutsier than its comparably powered European rivals. It also weighs the same or less, which logically should mean it'll be the quickest in a straight line. During my brief drives, though, I'm not sure it really stood taller than the three Germans. It at least matches them for smoothness, which is something that can't be said about the Volvo. Fuel economy is lower than them all when you consider all but the Mercedes come standard with all-wheel drive. It's also worth noting that all the competitors are available with engine upgrades, and unless Acura's forthcoming resurrection of Type S models includes the RDX, it should stay that way. Consumer Editor Jeremy Korzeniewski: Line 'em all up in a drag race, and I have a feeling the Acura would squirt away to victory. A good bit of that, though, would be due to its 10-speed automatic transmission, which offers a huge spread of ratios and fires off extremely quick shifts. In the real world, I'd guess fuel economy will be similar across the board, so I'm willing to call that category a draw.