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Infiniti teases November debut of new QX55 crossover-coupe

Infiniti will officially unveil its new QX55 crossover-coupe via social media on Nov. 11, Nissan's luxury subsidiary announced early Wednesday. Infiniti is calling it a return to the segment which the company helped pioneer when it launched the FX crossover back in 2002.  "With a roofline and visual elements inspired by the iconic Infiniti FX, the QX55’s provocative design will fuse the stance and versatility of a premium midsize crossover with the sleek profile of a sports coupe," Infiniti's announcement said. "Beyond its provocative looks, the QX55 will also feature innovative technologies designed to empower, engage and connect luxury customers to the road ahead." The announcement was accompanied by the above teaser image, which depicts the QX55's tapered liftgate. It's quite a bit more conservative than the previously released design sketch suggested, but certainly looks the part.  The QX55 is one of five new vehicles Infiniti plans to launch in the next three years. It was first teased last August during Monterey Car Week. While Infiniti has been leaning heavily on the heritage of the original FX (which later became the QX70) since releasing that first design sketch, the QX55 will actually have little in common with its spiritual ancestor. While they may share fastback SUV looks, the QX55 will be based on the QX50 — a modern, front-wheel-drive crossover with small, efficient engines. The FX was derived from Infiniti's sport sedans and coupes, and even boasted a V8 option for much of its existence. Production of the new crossover-coupe was slated to begin in June, but was reportedly pushed back due to complications at its production facility in Aguascalientes, Mexico. The facility is a joint-venture project between Mercedes-Benz parent company Daimler and Nissan, and produces several other front- and all-wheel-drive vehicles for both companies.  Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.    

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.

Upcoming QX80 will use current model's platform, powertrain

Infiniti previewed the next-gen QX80 full-size SUV at this year's New York Auto Show with the QX80 Monograph concept. The new model is slated to go into production by the end of this year. Despite the updated look, Motor Trend reports that the next QX80 will ride on the same platform as the current model, carrying along with it the 5.6-liter 400 horsepower V8. The current QX80 shares a platform with the Nissan Patrol globally and the Nissan Armada here in the US. The model has been a success for the automaker, outselling every other Infiniti but the smaller QX60 crossover and Q50 sedan. Though the platform dates back to 2010, it seems Infiniti doesn't want to spoil a good thing. Competition like the Mercedes-Benz GLS-class, Cadillac Escalade, and Lexus LX are about as old as the current QX80. While most new models are more refined than their predecessors, Infiniti Motor Company President Roland Krueger says it should drive about the same as the current model. While the V8 will carry over, Krueger didn't rule out the possibility of a smaller turbocharged V6 for the future. Also carrying over will be the independent, self-leveling rear suspension, though neither the QX80 or Armada get some of the Patrol's really good off-road components. Since there isn't much going on beyond the skin, expect a short development cycle and a full debut sometime this fall. Related Video: News Source: Motor Trend Design/Style Infiniti SUV infiniti qx80 infiniti qx80 monograph