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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 brand will finally make its debut in Japan, but not the name

Nissan left the automotive media scratching its collective head when it announced that its Infiniti luxury brand would be renaming all of its vehicles, with cars wearing the Q designation and CUVs/SUVs wearing the QX badge. So the G Sedan became the Q50, and the G Coupe became the Q60. The QX56, meanwhile, became the QX80, and the FX crossover became the QX70. It is still thoroughly confusing nearly a year later.
Not content to confuse its US customers alone, Nissan will be fiddling with the name of one of its most revered Japanese-market models - the Skyline. Rebadged for the US as the Q50, and before that as the G Sedan/Coupe, the new Skyline will wear an Infiniti badge. What makes this truly confusing, though, is that the car won't be called the Infiniti Skyline, despite its badging. It won't even be called the Nissan Skyline, anymore. It's now just the Skyline. Apparently, Nissan thinks it can capitalize on the Skyline's link to the Japanese royal family (the Skyline was originally a product of Prince Motors, which provided vehicles for the Emperor and his family), by ditching any brand names and referring to it as its own model, according to Automotive News.
Now, confusion aside, there are things about Infiniti badging in Japan that make sense. Badging all the Nissans that eventually become Infinitis as Infinitis in the first place goes a long way to make the brand seem separate and distinct from its parent company. Speaking to AN, Infiniti's executive vice president of global product planning, Andy Palmer, puts it this way, "We have to treat Infiniti, if you will, in the same [way] that Volkswagen treats Audi. It's not a Nissan-plus. Infiniti has to stand head-to-head with any of those German competitors."

Cadillac CT6 ushers in new naming convention

Johan de Nysschen has been at his new post as president of Cadillac for not even three months , but he's already seen two of his most notable accomplishments from his two-year tenure as president of Infiniti matched by Cadillac. The brand has announced that it is relocating its headquarters, and is now officially changing its nomenclature.
The brand's new flagship model will abandon the familiar three-letter designation enjoyed by every other model in the range (aside from the Escalade), and adopt an alpha-numeric title. So, rather than the expected title of LTS, Cadillac's top-end car will be called the CT6.
Of course, this won't be limited to just one model. According to Cadillac's press release, "familiar lettering like 'CT' would be used for car models, with the number indicating the relative size and position of the cars in the hierarchy of Cadillac models." And yes, that means what you think it means - Cadillac will use the exact same naming formula, albeit with different letters, as Infiniti.