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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.

Nissan shows self-cleaning car coated in nano paint

Washing the car is an activity like mowing the lawn that some people love and others find to be an absolute chore. For the latter group, Nissan may have an answer. Nissan is testing a nano-paint coating that could make the car wash a very infrequent place to visit.
Shown on a European Note hatchback, the key is a special layer of super-hydrophobic and oleophobic material called Ultra-Ever Dry that is sprayed over the paint. It creates a protective layer between the body and environment, and it means that when dirt or water come into contact with the car, the gunk just sheets away.
Nissan admits that the coating is still early in testing. The key will be if the stuff can actually last for the long term, and the company will be analyzing it over the coming months to see how it will react in different conditions. At the moment, the automaker has no plans to offer Ultra-Ever Dry as a standard feature, but it may make it available as an aftermarket addition in the future. Scroll down to watch the video of Nissan testing the stuff in some very dirty conditions.

Recharge Wrap-up: Renault EV movie, H2 fueling in Paris

Renault has debuted a new documentary called Le Peuple Electrique, or The Electric People. The film features two drivers touring France over the course of three weeks in a Renault Zoe electric vehicle. Along the way, the duo meet and come to rely upon other members of the EV driving community. Renault is showcasing the film at the COP21 summit in Paris to give an insight into the culture of electric vehicles. See the film above (it's in French), and read more in the press release from Renault.Nissan and Renault have joined forces for an ad campaign for their electric vehicles. The campaign, which focuses on the Nissan Leaf and Renault Zoe, coincides with the COP21 environmental summit, for which the automakers have supplied 200 electric cars as shuttles for attendees. The ad campaign consists of press, posters, and a series of six videos, each 15 seconds in length, to be shown on social media networks in France, the UK, Germany, Spain and Italy. Read more from Renault.Air Liquide has announced a hydrogen fueling station for fuel cell taxis in Paris. Electric taxi company STEP plans to launch a fleet of at least 70 Hyundai ix35 (Tucson) Fuel Cell taxis in the next five years. The fueling station will be located at Cours Albert 1er near the Eiffel Tower, so this is truly in the heart of the city. "This first station will allow us to promote the benefits of hydrogen as a clean energy for vehicles with consumers," says Air Liquide's Francois Darchis. "Hydrogen offers a concrete solution to the challenges posed by the issue of sustainable mobility, reducing greenhouse gas emissions as well as local pollution in urban areas." Read more from Air Liquide, or at Technologic Vehicles.The world's largest ultra-fast EV charging station is now operational in Beijing, China. Located at the Xiaoying Public Transit Bus Terminal, the station is capable of charging buses to 100 percent in as little as 10 minutes. It features 25 360-kW chargers and five 90-kW chargers, and enough space for 30 buses at a time. The buses come in to charge two or three times a day during their regular operation. Just in time, too. Read more in the press release below. World's Largest Ultra-fast EV Charging Station Goes Live in Beijing, Fully Charging Commercial Vehicles in 10 Minutes This 26,500 m(2) EV charging complex has 25 chargers at 360kW and 5 chargers at 90kW; maintaining a capacity for Ultra-fast charging 30 urban transit buses at the same time STAFFORD, Texas, Dec.