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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.

Nissan does its best Google Glass impression with 3E headgear [w/video]

The jury may still be out on whether it'll be legal to drive with Google Glass on your nose, but that doesn't mean automakers are going to sit around waiting to see which way the wind blows in one jurisdiction or another. Mercedes-Benz, for example, is already working on ways to integrate its infotainment system into Google Glass, but Nissan is taking things a step further by developing its own wearable tech.
The device is called Nissan 3E, and we don't have much information to go on at this point - just a couple of images, a terse press release and the highly stylized (and rather painful-looking) video below. The Japanese automaker lists internet connectivity and communication as the primary features. But we'd have to assume that, if an automaker is developing it, the device would have some relevance to, you know... driving.
The possibilities are endless, extending from turn-by-turn directions and track information to vehicle metrics and intuitive control of the car's auxiliary controls. We'll have to wait until we get to Tokyo to find out more, but between this and the smartwatch concept it revealed in Frankfurt, Nissan seems to be on a bit of a gadget streak lately.

VW was 2018's top-selling automaker — but

TOKYO — Volkswagen Group has held on to its position as the world's top-selling automaker for the fifth year in a row, although the German group was edged out again by the Renault-Nissan-Mitsubishi alliance in the light-duty vehicles segment. Renault SA, Nissan Motor Co Ltd and Mitsubishi Motors Corp together sold 10.76 million passenger cars and light commercial vehicles in 2018, according to Reuters' calculations after new data released on Wednesday. The group doesn't sell heavy trucks. Nissan said on Wednesday it sold 5.65 million vehicles last year, down 2.8 percent on the year. Mitsubishi reported an 18 percent rise in sales to 1.22 million units while Renault sold 3.88 million units, up 3.2 percent on the year. Volkswagen's deliveries rose 0.9 percent to a record 10.83 million last year, including its MAN and Scania heavy trucks, the German company said earlier this month. Excluding heavy trucks, it sold 10.6 million units. Toyota Motor Corp retained its third spot, announcing on Wednesday that it had sold 10.59 million vehicles last year including its Toyota and Lexus brands, along with minicars made by subsidiary Daihatsu and light and heavy trucks produced by its truck division Hino Motors Ltd. Excluding Hino trucks, Toyota sold 10.39 million units last year. The automaker has said it expects to sell a total of 10.76 million vehicles in 2019. Many automakers are trying to boost sales volumes to achieve economies of scale and reduce costs amid soaring investments needed to develop next-generation technologies, including self-driving cars and electric vehicles. This has been a focus of the Renault-Nissan-Mitsubishi Motors group, which is looking to share more vehicle parts and consolidate production platforms to trim R&D and manufacturing costs, while raising profitability. The alliance, which brought Mitsubishi Motors into its fold in 2016, is currently in crisis with its former Chairman Carlos Ghosn arrested and indicted on charges of misconduct. Nissan has also been indicted, and Renault appointed new top management last week. Related Video: Earnings/Financials Mitsubishi Nissan Toyota Volkswagen