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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.

Daimler eMERGE2 test proves ignorance breeds dislike of EVs

Out with the old EVs, in with the new. Daimler announced today that it has finished up the eMERGE electric vehicle project that used Smart Fortwo Electric Drive cars and will now start up eMERGE2, which will use Mercedes-Benz B-Class Electric Drive and PHEV vehicles. As before, the tests will take place in Germany. The first, just-finished eMERGE program ran from May 2013 to June 2015 and put over a million kilometers (621,000 miles) onto 146 Smart Fortwo EDs. Daimler said that over the two years, the vehicle with the most efficient annual energy consumption used just 10.4 kWh for all of its 100 kilometers. The best full-charge range over the year was 161 kilometers (100 miles). Perhaps most interesting, though, was one of the projects findings: "the less an interviewee knew about electric mobility, the more negative their opinion" about the technology. In other words, here's some more proof that getting "butts in seats," as it were, is one reasonable way to promote electric driving. eMERGE: key contribution to developing the mobility of the future Stuttgart/Berlin, Jul 30, 2015 Broad-based real-world trial of eMERGE project completed Especially for daily distances of 50 km or over the E-car is financially attractive eMERGE2 fleet project now launching with 200 Mercedes-Benz B-Class Electric Drive and plug-in hybrid models Stuttgart/Berlin – After more than one million kilometres in two years – from May 2013 to June 2015 – the real-world trial of electric cars known as eMERGE has been completed. Those taking part in the project were private and business customers with 146 smart fortwo electric drive cars from Berlin, Potsdam and North Rhine-Westphalia. Some of them set records: the lowest average energy consumption over one year was 10.4 kWh/100 km, while the longest range was 161 kilometres. The smart fortwo electric drive is certified with a consumption of 16.3 kWh/100 km and a range of 145 kilometres. The broad-based field trial within the framework of the eMERGE project has not only provided information on user behaviour and e-car technology; it also studied intelligent charging systems for improving the utilisation of the power supply as well as various pricing systems with regard to customer acceptance. Based on transport models, the project partners examined the need for a publicly available charging infrastructure. Within the project Daimler was responsible for collecting the driving and charging data required for evaluation of the field trial.

2014 Mercedes-Benz S-Class caught totally undisguised

Based on the lightly camouflaged spy shots of the 2014 Mercedes-Benz S-Class we've seen lately, it hasn't taken a vivid imagination to picture what the next iteration of this big luxury sedan will look like. Even so, we now we have our first unobstructed views of the redesigned S-Class, codenamed W222, as it has just been caught out flaunting for some promo shots.
The first thing we notice about the new S-Class design is the disappearance of the last generation's flared wheel arches. Yet the new design adds even more character with bodyside creases similar to the CLS-Class and some elements reminiscent of 2007's F700 Concept, including the massive grille and vertical LED taillights. Other key details include a large panoramic roof and the narrow exhaust outlets, but the large LED-trimmed headlights and the aggressive front fascia are probably the biggest departure from the current design. With these spy shots, we also catch a blurry shot of the interior, but we've seen a practically uncovered look at the new S-Class' cabin back in January.
Overall, the next S-Class sports an expressive and premium new look, but as far as all-new designs go, it's quite conservative - a move no doubt fitting for these lean financial times.