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NRG eVgo ready for 'No Charge to Charge' in Atlanta

That loop of highways circumnavigating the city of Atlanta is about to get some fast chargers. And, for those driving newer Nissan Leaf electric vehicles, some free chargers as well, for the next couple of years. It's the new taste of southern hospitality. NRG Energy, which has been expanding its NRG Evgo fast-charging networks across the country, is now going into the Atlanta metro area. The stations, which can fully charge an electric vehicle in as few as 30 minutes, will be located "along major thoroughfares in retail locations." This makes sense, since Atlanta has emerged as a major plug-in vehicle market this year. Additionally, the "No Charge to Charge" program that NRG eVgo helps administer will apply in NRG eVgo's Atlanta network. That means that Georgians who either buy or lease Leaf EVs will be allowed to charge their cars at the eVgo stations for free for the first two years. Other eVgo programs are up and running in Texas, Phoenix, Nashville, Washington, D.C. and the Pacific Northwest. Last month, the NRG eVgo program took over a proposed fast-charging network in Chicago, where charging-station deployments had stalled. Take a look at the NRG eVgo press release for Atlanta below. NRG eVgo Announces Electric Vehicle Charging Network in Atlanta ATLANTA, December 09, 2014 – NRG eVgo, a subsidiary of NRG Energy, Inc. (NYSE:NRG), is expanding its comprehensive electric vehicle (EV) infrastructure designed to support EV drivers whenever and wherever they choose to charge - at single family or apartment residences, at work, on the road, or even at the airport to the Atlanta metro area. The new network will give Atlanta EV drivers unprecedented access to cutting-edge fast charging technology and bring much-needed EV infrastructure to the region. "We are pleased that NRG has chosen to expand its eVgo charging network in the City of Atlanta," said Mayor Kasim Reed. "Establishing a robust fast-charging network is essential to even broader adoption of electric vehicle use, both here in Atlanta and across the country." Recently, according to IHS Automotive, Atlanta emerged as the second major metropolitan market for EV sales, following San Francisco. Atlanta is geographically large, meaning most people commute to work, and have a need for a sustainable, reliable charging infrastructure.

On Location: 2015 Nissan Micra Cup racecar at Mont-Tremblant

Circuit Mont-Tremblant has an almost mythical aura for North American road racers, and it was the setting for our high speed test of the 2015 Nissan Micra Cup racecar. Nestled in the Laurentian Mountains of Quebec, the course hosted Formula One races in 1968 and 1970, Trans-Am and Can-Am competition in the 1960s and '70s, and more recently a Champ Car event in 2007. In its current configuration, Mont-Tremblant has 15 turns and covers 2.65 miles of rural Quebec about 90 minutes northwest of Montreal. Put simply: It's an excellent venue to test the Micra Cup racer, which is underpinning a spec series in Canada this summer and fall. The cars are outfitted with a Nismo suspension kit, FIA-approved racing seat with a five-point harness, safety cage, upgraded brakes, modified exhaust, and Pirelli low-profile performance tires. The stock 1.6-liter four-cylinder engine with 109 horsepower mated to a five-speed manual is unchanged. It's a cool, misty day when we get behind the wheel of the Micra Cup car. Though we're nervous, Nissan is billing the Micra Cup as a series for nearly anyone, calling it the bridge between karting and more serious racing. We believe that – the Cup car is fairly easy to drive – and our instructor is helpful with tips on the gearing and setting up corners. We finish our laps feeling excited, challenged, and wanting more. As the video above shows, the car is eager to please, and it's a lot of fun to toss around an iconic track.

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.