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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.

Cadillac ELR, Nissan Resonance and Ford Atlas win Eyes on Design awards

This year's annual Eyes on Design awards were presented at the end of press days for the Detroit Auto Show on Tuesday. Given out for the best production and concept car designs that debuted at the show, and voted on by an esteemed panel of actual car designers, this year's award for best production vehicle design went to the 2014 Cadillac ELR. The 2014 Chevrolet Corvette, which was the show favorite among Autoblog editors, apparently did not impress the Eyes on Design judges enough with its all-new vent-festooned design.
The award for best concept design was actually split as a tie among the Nissan Resonance and Ford Atlas concepts. Last year's winners were the 2013 Ford Fusion and the Lexus LF-LC concept.
The Eyes on Design organization also presented a new honor this year called the Catalyst Award to Bob Lutz, former Vice Chairman of General Motors. Lutz is reported to have given a defense of design in his acceptance speech, arguing that advancements in quality across the industry as a whole have made good design a key differentiator for buyers.

Nissan presents NV200 is the brave new face of London taxis [w/video]

In most cities, just about any vehicle can serve as a taxi - so long as it meets the owner/operator's requirements for reliability, comfort and utility. But certain cities have their own unique taxis, and Nissan has been working hard to corner those markets. It has already designed specific taxis for such locations as New York, Barcelona and Tokyo, but its latest effort will bring a new Hackney Carriage to the streets of London.
A year and a half ago, Nissan displayed its NV200 on the streets of London in traditional black livery. But this new design takes the customization for the British capital one step further. Working closely with the mayor's office and with cab drivers across the city, Nissan's European design center in the Paddington district has reskinned the NV200 specifically to serve as the new black cab in London. The new face features round headlights, a new grille, LED lighting and a restyled front bumper. The steering has also been reconfigured to meet the 25-foot turning circle requirements for Hackney Carriages, as the black cabs are known on the streets of London.
The result is a distinctly British take on the NV200 taxi - one that we're guessing won't go without its fair share of controversy. Nissan will begin offering the black cab at the end of the year with a 1.6-liter gasoline engine mated to an automatic transmission, a powertrain said to be cleaner than the diesels used in existing taxis. And Nissan should know, having supplied many of those 2.7-liter turbodiesels in the '80s and '90s. But if that's not clean enough, the Japanese automaker will also begin selling an electric version, the e-NV200, starting next year. Watch the video clip and read the full details in the press release below.