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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.

2021 Infiniti QX55 will get the company in the crossover 'coupe' game

Seeing how German automakers are printing money with less-practical but arguably more stylish crossover "coupes," Japanese luxury brand is getting in on the action, too. The company announced it will introduce a fastback crossover named QX55. And while the company hasn't revealed the actual vehicle yet, it did release the above conceptual sketch. As you can see, it doesn't reveal much except that the QX55 will have a low, curvy shape. It will probably have four doors like its competitors. Infiniti says the roofline is meant to evoke the company's first crossover, the FX. We disagree on that detail, because while the FX did have a stylish, low-slung roof compared with its contemporaries, it still had a fairly conventional and upright hatch (see below). Judging by the name, the QX55 will probably be based on the platform and powertrain of the QX50. That means it should have a version of that crossover's variable-compression ratio turbocharged four-cylinder, along with front-wheel drive or all-wheel drive. Infiniti says the QX55 will go on sale in the summer of 2020, so expect a full reveal during the coming auto show season.

Infiniti rolls out new badge, brand experience — even a brand scent

Infiniti kicked off a brand refresh Thursday, showing off a new logo (and corresponding changes to its physical emblems), dealership aesthetic and what brand representatives described as elements of its "multisensory experience." Do you know what Infiniti is supposed to smell like? Well, you're about to learn.  The alterations to the logo are subtle from dead on, but as you can see from our featured image above, its physical form is far more intricate and three-dimensional. This is the fourth generation of Infiniti's signature since the brand was launched in 1989. Yep — Nissan's upscale division is 35 years old this year. Can you believe that? The most significant visual difference is the alterations to the "road" in the center of the logo. Infiniti says this was done to emphasize the notion that the road is endless — infinite, if you will. The clipped point represents the horizon. The physical badges will be illuminated, "boldly" announcing the car's arrival.  "Our aim was to subtly evolve the INFINITI logo in support of the bright new chapter that lays ahead," said Alfonso Albaisa, Infiniti SVP of global design. "Adding greater emphasis to the point where the infinite road intersects with the horizon, we are showcasing our steadfast commitment to always look forward to the future and to new horizons." The new badge will also be accompanied by a new signature scent and signature sound. The former is a blend of Japanese cypress, cedar and yuzu. The sound "creates a sense of anticipation by marrying powerful musical elements with more serene sounds to deliver a harmonious balance" and will be employed in marketing materials, advertising, dealership experiences and other consumer-facing assets.  A new architectural and interior design direction accompanies the update. The aesthetics are based on the Japanese concept of Ma — "a philosophy that considers the space between things," Infiniti said. The result looks modern, sophisticated and convincingly upscale, reminding us of a cross between a Volvo and Mercedes-Benz showroom. Not a terrible place to be.  Infiniti's new look rolls out today across its digital spaces.