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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 GT-R takes a bloody whack at supercar rivals in fake ads

A big part of what makes a supercar super is how it makes you feel, but the performance stats and bragging rights are undeniably a big part of the equation as well. Which means you can't ignore the fact that, even with its price ever escalating, the Nissan GT-R makes minced meat out of European exotics costing twice or three times as much.
That's the inspiration for this trio of fake ads from photographer Tim Kent. In this mock campaign, Kent has depicted the GT-R as a butcher's knife and the European exotics as pieces of slaughtered meat. Ferrari is symbolized by a package of horse meat, Porsche by a pack of sausages and Lamborghini as a pair of, um... "prairie oysters".
Of course the ads are never going to run anywhere, and if you're squeamish (or vegetarian) we wouldn't suggest looking at them in close proximity to your lunch. But we have to admit they're creative, and effective.

Renault-Nissan has sold 200,000 EVs, claims 58 percent global share

The all-electric Renault Zoe sold 10,000 units during its first year on sale and the French automaker has sold a total of about 51,500 EVs since starting sales of its four-vehicle EV lineup in 2011. Renault's collection also includes the Twizy two-seater, the Fluence sedan and the Kangoo van – just look at the awesome concepts from 2009 in the gallery above. Throw in the fact that the Nissan Leaf has sold around 150,000 around the world and some sales of the e-NV200 delivery van, and we get to a banner headline for the Renault-Nissan Alliance: the companies have sold over 200,000 EVs since the Leaf went at sale in the end of 2010. The Alliance announced it crossed the 100,000 EV sales mark in July 2013, so we can calculate that the two companies are selling roughly 6,250 EVs a month, with the Leaf making up the bulk of that figure (the car is averaging around 3,000 units a month in the US alone). Nissan says that Leaf has cumulatively sold around 67,000 Leafs in the US, 46,500 in Japan and 31,000 in Europe. The 6,250 sales per month is a rough estimate, since the Alliance says its sales are up 20 percent this year compared to last. Still, all told, Renault-Nissan claims it has 58 percent of the global market share for EVs, and its battery-powered vehicles have driven four billion kilometers (2.48-billion miles), which has prevented 450 million kilograms of CO2 from entering the atmosphere. Who wants to bet when the 300,000 threshold will be crossed? Renault-Nissan Alliance sells its 200,000th electric vehicle Renault-Nissan EVs have driven 4 billion kilometers and enjoy 58% of zero-emission global market share Nissan LEAF remains best-selling EV ever; Renault led in Europe last month Alliance launches monthly video series introducing electric vehicle owners from around the world sharing their personal stories with their zero-emission car PARIS/YOKOHAMA (Nov. 26, 2014)-The Renault-Nissan Alliance has sold its 200,000th electric vehicle and has a leading 58% market share for zero-emission cars. Together, Renault and Nissan EVs have driven approximately 4 billion zero-emission kilometers – enough to circle the earth 100,000 times. Renault-Nissan's EVs represent 200 million liters of fuel saved – enough to fill about 80 Olympic-sized swimming pools. Alliance EVs also represent 450 million kg of CO2 that has not been emitted while driving.