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Infiniti darkens down QX70S Design for Paris debut

Dig the Infiniti QX70 but wish it were just a touch more low-key? Infiniti will have the answer at the fast-approaching Paris Motor Show, where it will launch the QX70S Design.
Based on the vehicle erstwhile known as the FX, the QX70S Design gets dark chrome all over: on the grille, foglight surrounds, side air vents, side sills and license plate surround. The headlights are smoked and the 21-inch six-spoke wheels, roof rails and mirror caps are painted black.
The darkened treatment continues inside with black lacquer trim and black leather with purple stitching. The S Design otherwise gets all the equipment of the S Premium model. It goes on sale in Europe right after its debut in Paris, and while we're told this trim isn't planned for the North American market, there's no telling what the future will hold.

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.

Infiniti gets boiled down to four P's: Performance, passion, precision, provocation

So then we asked, "Well, what does that mean?"
We met Andreas Sigl, the global director of Infiniti's Formula One involvement (that's him above on the right), at the US Grand Prix in Austin last year, and our questions to him were aimed at understanding what Infiniti was doing and where it intended to go. In spite of regard for its products and increased sales, few outside - and even inside - Infiniti seemed to have a clear idea of what the brand stood for.