2008 Smart Fortwo Passion on 2040-cars

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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.

The future of urban travel, according to Mercedes-Benz

The Smart vision EQ fortwo is Daimler AG's take on the future of mobility. This electric concept has no pedals or steering wheel and considers a future with autonomous car sharing.

Recharge Wrap-up: Pikes Peak Honda CR-Z, Tesla's liquid-cooled cable

Honda will race a CR-Z hybrid in the Pikes Peak International Hill Climb. The car will use Electric SH-AWD, which probably means it will be using electric motors to power the rear wheels. Whether the Pikes Peak CR-Z uses the same powertrain as the upcoming Acura NSX or the 3.5-liter V6 with three-motor hybrid system used in the Acura RLX Sport Hybrid is still unclear. The car will also use Acura's Precision All-Wheel Steering (P-AWS) system. The CR-Z will be piloted by Tetsuya Yamano. Read more at Hybrid Cars, or, if you read Japanese, at Response. Tesla has introduced a thinner, liquid-cooled Supercharger cable. While the convenience of not having to "wrestle a good-sized snake into the car," as Elon Musk calls it in a shareholder speech, is wonderful, it could also allow for faster charging in the future. The liquid-cooled charging cable "also has the potential for increased power of the Supercharger long-term," says Musk. A cable able to withstand larger loads could mean shorter stops when it's time for a charge. Tesla has installed the first next-generation cable at the Mountain View Supercharger. Read more at Charged EVs. Smart is offering its Twinamic automatic dual-clutch transmission on more models in Europe. In addition to the 71-horsepower Smart Fortwo, the DCT will now be available in the 90-horsepower Fortwo and the 71-horsepower Forfour. In the Fortwo, the Twinamic DCT adds ˆ1,275 (about $1,437) to the price over the manual transmission, and is an extra ˆ1,425 (about $1,606) in the Forfour. The option of steering wheel-mounted paddle shifters as part of the Sport package makes driving the efficient microcar even more fun. Deliveries of the newly equipped vehicles begin at the end of July. Read more in the press release below. smart extends twinamic range for fortwo and forfour: Even more models with automatic transmission Stuttgart. Following in the footsteps of the smart fortwo with 52 kW/71 hp, the smart fortwo with 66 kW/90 hp and the smart forfour with 52 kW/71 hp are now also available with fully automatic twinamic dual clutch transmission. This costs an extra 1275 euros compared to the versions with 5-speed manual transmission (forfour: 1425 euros). This means that both model series now offer a choice between no fewer than nine engine/transmission combinations. Delivery of the new models will begin at the end of July 2015.