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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 offers chance to design Sebastian Vettel's helmet for the USGP

The Circuit of the Americas will host its second United States Grand Prix in November, and based on what's happening with New Jersey it might be the only US torch left alight in the Formula One firmament. The story even before the inaugural event was about getting American fans involved, and Infiniti appears to be making the first splash this year with a competition to design Sebastian Vettel's helmet for the first two days of race weekend.
The only thing required of the graphic designer within you is to head to the competition site, download the helmet template and slather it in your unique technicolor vision. It will require some thought to make something interesting, though, since much of the helmet is already committed to team and sponsor logos; other than a few thin strips along the sides, your creativity will be confined to the oval atop the shell. Vettel will choose the winner and will wear the selected lid during the free practices and qualifying.
The grand prize winner will also get a VIP trip for two to the grand prix as a guest of Infiniti, which includes some face time with the triple world champion himself. The contest is on now, the deadline for entries is 11:59 pm GMT (6:59 EST), Sunday, September 29th and the winner is chosen the very next day. There's a press release below with more info if you want the complete skinny before putting stylus to digital paper.

2017 Infiniti QX30 beefed up and ready for LA debut

Infiniti has released the first details and photos of its new compact crossover. Dubbed the QX30, the latest addition to the premium lineup is set for parallel debuts at the upcoming auto shows in Los Angeles and in Guangzhou, China. And with it, the luxury automaker is going after a younger demographic. Previewed by the QX30 concept unveiled earlier this year in Geneva, the new crossover joins the Q30 hatchback in Infiniti's new "entry-level" model line. Set to be produced at Nissan's mega factory in Sunderland, UK, the QX30 will be the first Infiniti to be built in Europe. But as you might discern from its introduction in LA, it'll form a vital part of the brand's strategy for the US market as well. The design looks instantly recognizable as an Infiniti, looking almost exactly like the Q30... only more rugged. Apart from the increased ride height, suitably ruggedized lower bodywork, and telltale (but slimline) roof rails, it adopts the same curvaceous, organic lines as the hatchback, and signature double-arch grille and kinked C-pillar as you'd expect from any modern Infiniti. The Japanese automaker has yet to show us much of the interior, but it promises an asymmetric design, premium materials, and ergonomic surfaces. Nor has Infiniti revealed much in the way of technical details. What it has told us, however, is that the new QX30 will encompass an all-wheel-drive system capable of sending up to 50 percent of output to the rear wheels, running through a seven-speed dual clutch transmission. Availability of diesel and gasoline engines will depend on the individual market. If its lower-riding stablemate is anything to go by, we should be looking at a 2.0-liter turbo four producing 208 horsepower and 258 pound-feet of torque. Technical specifications are due to be announced closer to its market introduction in the middle of next year. At that point, rivals like the Mercedes GLA, Audi Q3, BMW X1, and Lexus NX will be put on notice as Infiniti joins an increasingly competitive market for premium compact crossovers.