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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 names former BMW man Kruger to fill de Nysschen role

Today is turning into a big one for senior leadership changes in the automotive industry. Hot on the heels of Ferrari announcing the replacement of its chairman, Infiniti has announced the appointment of its new chief executive in Roland Krüger.
Serving until now as a senior vice president at BMW, Krüger joins Infiniti as its president as well as senior VP at parent company Nissan, reporting directly to Carlos Ghosn. Krüger had been with BMW since 1998, primarily as a regional director, having previously started his career as a designer for Mitsubishi and the Smart division at Daimler.
Krüger's appointment comes just over a week after the announcement that Infiniti's chairman Andy Palmer would be leaving for Aston Martin, and two months after the departure of outgoing Infiniti president Johan de Nysschen for Cadillac. The Japanese luxury automaker, headquartered in Hong Kong, has been in the meantime essentially operating by committee in the absence of a chief executive. The nomination of Krüger will surely bring a large measure of stability and direction as the company seeks to take a larger slice of the pie, in particular from German automakers like the one for which Krüger worked until now.

Infiniti QX60 Monograph previews a handsome next-gen three-row crossover

Infiniti has pulled the sheet off its QX60 Monograph — a styling exercise meant to preview the forthcoming production replacement for its three-row crossover. Infiniti insists that while this is not the production QX60 replacement, it is close enough to not merely be labeled a "concept." Whatever Infiniti wants to call it, it's impressive. This slick design blends elements of the original Infiniti FX line with some of the luxury brand's more recent artistic direction (see: the big, fat grille) and perhaps a little dose of European flavor; we'd be lying if we said there wasn't some Jaguar F-Pace evident in that profile.  "More than a design study or concept, a 'Monograph' provides a tangible insight into how Infiniti plans to transform a future model. The QX60 Monograph previews some of the proportions and design elements that will adorn the brandÂ’s future three-row SUV, " Infiniti said in the QX60's official announcement. "We commenced the design of the Monograph knowing this was an opportune time to start a discussion about where we are planning to take the QX60 in the future," said Alfonso Albaisa, senior vice president, Global Design, Nissan Motor Co. Ltd.  "In crafting this Monograph, we wanted to change the tonality of the QX60 and transform the nameplate from a sculptural and architectural point of view. We raised the visual center of gravity, giving it a strong, straight shoulder line that carries through to the hood, with a higher, more prominent grille, and longer-looking cabin to deliver a sense of muscularity and a commanding presence," Albaisa said. Every element of the QX60 Monograph's exterior was designed deliberately to convey that image, from the heat-sink-inspired shape of the headlamps to the slick, well-integrated segments of the rear lighting signature, which blends into a single wrap-around element when not illuminated.  As close to production-ready as this QX60 Monograph might be, there are some obvious signs that there's still work yet to be done. As you'll note, there's not a single shot of this crossover's interior, and that's because it doesn't have one yet. Infiniti knows it can't afford to fumble a new launch, especially of a crossover, so we have fairly high expectations for its cabin, especially since Infiniti has been known to produce some top-notch interiors when it tries. Look for the real-deal next-generation QX60 to be shown sometime in 2021.