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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.

Infiniti QX Monograph Concept debuts at Pebble Beach looking large

The Infiniti QX Monograph Concept is here, and it sure presents like a veiled look at the next Infiniti QX80 SUV to us. Now, Infiniti didn’t make any allusions to the QX80 in its announcement at Pebble Beach, but the full-size dimensions and general shape tell us pretty much everything we need to know. This reveal is also a continuation of InfinitiÂ’s “Monograph” line of concept cars with the most recent one being the QX60 Monograph. That concept previewed what would become the production QX60, suggesting that this next Monograph concept will do the same for the larger QX80. As for the details of this particular design concept, Infiniti went into great detail about all its elements. Starting up front, the grille is meant to evoke a bamboo forest with its gentle arcing lines surrounding the new Infiniti logo. Meanwhile, the black finish and surround hint at the power found behind it — Infiniti didnÂ’t say what this concept is powered by, but we fully expect the next QX80 to have a gasoline engine situated under the hood. Flanking the grille are the lights that Infiniti says feature its “digital piano key” design and both “welcome” and “farewell” animation sequences. Since the headlights and DRLs are separated, Infiniti went ahead with that intricate “piano key” look for the DRLs to create a distinct signature. They wrap from the grille to around the side of the front bumper in an attempt to emphasize the width and height of the QX Monograph. You really get a sense of the QX MonographÂ’s size from its side profile. It has a vast monotone greenhouse that visually separates itself from the body by being painted entirely in black. The minimalist styling Infiniti says it used for this vehicle is best seen from this angle. It has electric door handles that pop in and out to create an uninterrupted look all the way down the side of the SUV. Meanwhile, the massive wheels bring some visual pizazz to the whole package. TheyÂ’re machine-finished wheels with both black and red accents arcing through, and Infiniti says its design inspiration for them was wind turbines. And on the topic of paint, Infiniti says it developed a new hue called Akane for this concept. ItÂ’s difficult to tell in photos, but the six-layer paint glows in the sun in an attempt to mimic “a warm glowing red sunset as it transitions into a dark night sky.” Of course, in most conditions, itÂ’ll likely just look gray.

Infiniti introduces Q70 Premium Select Edition to Monterey crowds

Infiniti has made its presence at the 2015 Monterey Car Week known, introducing a new version of its flagship sedan, the Q70. As far as special editions go, the new Premium Select Edition Q70 is fairly light on upgrades, going for minor aesthetic tweaks rather than rocking the boat too heavily. Unsurprisingly, one of the most obvious changes is down low, where Infiniti's stylists have fitted new 20-inch wheels. The gunmetal hoops are joined by dark chrome trim on the fascia, a new rear bumper, and a decklid spoiler. Buyers have the choice of two interior trims. There's Graphite and Stone, both of which feature semi-aniline leather, a "suede-like" headliner, and aluminum interior trim pieces. Infiniti isn't too picky when it comes to powertrains for the Premium Select Edition, although there are some restrictions. It can be had with both the 3.7-liter V6 and 5.6-liter V8 and in rear- or all-wheel-drive models. Weirdly, though, you can't get the stylish trim on the Q70 Hybrid or on long-wheelbase models. We can't tell you how much it'll cost to add the special-edition trim, because Infiniti did not deign to release pricing info. We can, however, tell you that the Q70 Premium Select Edition will hit dealers this November. Look for more, including live images of the new sedan, as the Monterey Car Week continues. Until then, scroll down for the official press release. Related Video: 2016 Infiniti Q70 Premium Select Edition debuts at Pebble Beach Concours d'Elegance PEBBLE BEACH, Calif. – Infiniti today announced that the new 2016 Infiniti Q70 Premium Select Edition will be on display this week in the Infiniti Pavilion at the Pebble Beach Concours d'Elegance. The specially equipped Q70 premium sedan will be available at Infiniti retailers nationwide beginning in November. "Following the introduction last year of the new Infiniti Q70 long-wheelbase model, we are continuing to expand our flagship Q70 sedan's portfolio of offerings," said Randy Parker, vice president, Infiniti Americas. "The new Premium Select Edition package gives the Q70 an extra touch of premium elegance that is right at home here at Pebble Beach – or in any neighborhood or driveway across the country." The Q70 Premium Select Edition's exterior offers dark chrome trim, a darkened lower rear bumper, a rear decklid spoiler and unique design and color 20-inch aluminum-alloy wheels with 245/40R20 all-season performance tires.