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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 poaches Ram CEO Fred Diaz

Nissan has announced that it has hired Fred Diaz as its new divisional vice president of sales and marketing. With the appointment, Diaz unexpected exits his post as president and CEO of Chrysler's Ram brand, a position he has held since 2009 when the brand was created as a separate entity from Dodge. He was also president and CEO of Chrysler de Mexico.
Nissan issued a press released - posted below - in which it says that Diaz's newly formed position will be responsible for the day-to-day operations of the brand in the US, including such facets as sales, marketing, parts and service, along with administrative matters. In addition, he will lead Nissan's light commercial vehicle and fleet division, likely a key attraction with his Ram background.
Chrysler has yet to name a replacement for Diaz.

Recharge Wrap-up: Formula E's other events, continued record EV sales

Formula E wants fans to know that it is more than just a race. During each ePrix weekend, the electric race series hosts a variety of events. For each race, Formula E sets up an eVillage where fans can meet drivers and get autographs, learn about electric vehicles, spectate Formula E's School Series races, enjoy live music and dance performances, play games, eat food and take part in numerous other activities that don't make their way into the television broadcast. Or course, though, the race is always the main event. See more in the video above. Electric vehicles enjoyed a fourth straight month of record sales in February. Despite low oil prices, customers bought an estimated 7,881 EVs last month, up 13 percent from a year before. 52 percent of those sales were battery electric vehicles, while the rest were plug-in hybrids. BMW i3 sales dropped 77 percent over a year ago, selling 248 cars. The Tesla Model S and Chevrolet Volt sold the most, while the Ford Fusion Energi outsold the Nissan Leaf for the first time. The Audi A3 E-Tron sold 248 units (same as the BMW i3) despite low inventory. Read more at Inside EVs. Renault more than doubled its EV sales in January compared to a year before. Sales were up 104 percent, at 1,886 units (1,977 if you include the Twizy). This January marked higher EV sales for Renault than the three previous years. The biggest selling Renault EV, which also happened to be Europe's best selling EV, was the Renault Zoe, up 105 percent at 1,416 units sold. Read more at Inside EVs. Nissan's "No Charge to Charge" promotion has expanded to Orlando, Florida. This is the 27th market in the US to offer free charging to Nissan Leaf customers. Buyers and lessees get two years of free charging with an EZ-Charge card, which works with AeroVironment, Blink, ChargePoint, Greenlots and NRG eVgo charging networks. "Significantly lower operating costs and a fun-to-drive nature make owning the all-electric Leaf a cost-effective and convenient choice for Orlando residents," says Nissan EV Sales & Marketing Director Andrew Speaker. Read more in the press release below. Nissan's "No Charge to Charge" program increases to 27 cities in the U.S. with the addition of Orlando Free public, electric vehicle charging now offered to new Nissan LEAF buyers in the Orlando metro area ORLANDO – Nissan's "No Charge to Charge" promotion has officially arrived to the Sunshine State.