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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.

Datsun's lackluster initial sales fall below Tata Nano

When Tata introduced the Nano back in 2008, everyone was amazed at how cheap it was. They called it a game changer, but no game was changed. In fact, it took Tata five years to sell the 250,000 units it had the capacity to build in a single year. As it turns out, even buyers in what economists call "developing markets" like India aren't necessarily interested in buying an ultra-cheap automobile. And now it appears that Nissan may be falling into the same trap.
A little over a year ago, Nissan revived its old moniker Datsun to serve as a budget brand - similar to what ally Renault did with Dacia. Its lineup (consisting of models like the Go hatchback, Go+ minivan, On-Do sedan and Mi-Do hatch) is largely based on old architecture, packaged with little more than basic equipment and sold at rock-bottom prices. But Bloomberg reports that, even in the brand's core markets like India and Indonesia, the new Datsuns haven't been selling.
According to local industry figures, Datsun has sold fewer than 10,000 units of its $5,100 Go hatchbacks in India since its introduction back in March. Maruti Suzuki, by comparison, sells twice that many of its similarly priced Alto hatchbacks every month. In fact, after peaking in April, Datsun only sold 607 units in India this past July, dipping 77 percent to drop below even the number of Nanos which Tata sold that month.

Nissan to build Golf-fighter in Spain

Nissan hasn't had a proper European entry in the ridiculously popular compact hatchback segment since it stopped offering its somewhat staid and uninspiring Almera (above) in 2006. According to Automotive News Europe, the new machine, which will not be called Almera, will be marketed against the Volkswagen Golf and Ford Focus - two extremely popular models in Europe. Production is slated to begin in July of 2014.
The new compact will be built in Barcelona, Spain, at the factory that currently builds the Pathfinder, Navara pickup and NV200 commercial van. An investment of $178 million will be made to assemble the compact car, and an additional $27 million will go to the plant to create more trucks and transmissions for electric vehicles.
The decision to invest in Spain comes after the automaker successfully renegotiated contracts with local unions. Similar talks are underway in France, where Nissan partner Renault is based, but as of yet no new agreements have been struck. Feel free to browse through the official press release below.