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Recharge Wrap-up: Reverse graffiti powered by Nissan Leaf; BMW introduces Wallbox Pro

BMW has a new, faster version of the Wallbox home EV charger. The Wallbox Pro offers 7.4 kilowatts, and can charge the BMW i3 to 80 percent in under three hours. It features a seven-inch touchscreen and proximity sensor, plus an 11.5-foot cord. The Wallbox Pro can also be used with smart home systems such as lighting and heating. The Wallbox Pro is available in Europe, and will come to the US later in the year. Read more at Hybrid Cars. Nissan is using the Leaf to power the creation of "reverse graffiti" in London. The company has commissioned artist Moose to selectively wash dirt off of a wall outside of a subway station, leaving behind a mural of London landmarks. Moose used a jet washer powered by the Leaf's battery to create the piece. The goal is to highlight the amount of pollution in London and other large cities, which is not a new idea. "It is a reminder that electric vehicles don't have an exhaust to emit the kind of air pollution which has stained the wall Moose has created his piece on," says Nissan's Jean-Pierre Diernaz. See the artwork in the gallery, and read more in the press release below. Local Motors used a 3D printer to make the Strati electric car in 44 hours. The car was printed with 212 layers of carbon-reinforced ABS thermoplastic. After printing, the team then spent two days finishing the car to make it run. It is powered by the drivetrain from a Renault Twizy, and is capable of 40 miles per hour. Now the question is if this sort of small-scale car manufacturing using 3D printing technology will catch on. See how a car gets printed in the time-lapse video below, and read more over at Treehugger. Nissan cleans up London with the world's first car-powered graffiti - Nissan LEAF powers "Reverse Graffiti" street art in Waterloo - Mass-scale mural imagines a cleaner London, without car fumes - The artwork is on show in Waterloo, London near popular Southbank LONDON – Nissan is highlighting London's battle with air quality in the UK by using the 100% electric Nissan LEAF – the world's best-selling electric vehicle (EV) – to power a striking piece of street art in Waterloo, London that depicts the capital's iconic skyline. Nissan commissioned Reverse Graffiti artist Moose – the founder of his field – to create the mass-scale mural, which was unveiled today. Unlike traditional graffiti, Moose creates his art by cleaning dirt off surfaces using a jet washer or wire brush, leaving a striking design in negative on the wall.

Gran Turismo vs reality as Red Bull pro-gamer takes on Nismo pro racer

The last time we saw a real racing driver pitted against a professional gamer, Viagame threw one of each in a Renault Megane RS and the contest was staged as the pro driver navigated the Circuit de Catalunya in Barcelona. That could be seen as a handicap for the gamer, since he's got to get his drive on while dealing with all sorts of unfamiliar G-force sensations that are out of time with what he's doing. Even so, the gamer won.
Nismo has taken its turn, running almost the same contest at Silverstone in the UK. This time, though, it has put its GTAcademy Driver and pro driver Wolfgang Reip in a car by himself, while Red Bull pro gamer Erik Leštach gets to play Gran Turismo 6 safely locked down in the pits. With each driver in his chosen milieu, the game is afoot.
You can find out who won by watching the video below, and for a chance to win something yourself, Nismo will send a box of goodies to whomever guesses the winning time in the video's comments on YouTube.

Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.