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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.

Can a car be lifted using rubber bands?

It's quite amazing what it takes to lift a car. We already know the feat can be accomplished using just a pair of phone books, but what about rubber bands? To the Internet! A video series appropriately titled "Will It Lift" attempted to find out by using a massive crane and a Nissan Micra weighing less than 1,800 pounds.
Doing a little math, the trio determined that it would take 180 rubber bands to support the car. A metal bar was placed through the window openings and another was place atop the car, and then attached together using the rubber bands and hooked to the crane. Now these aren't any special rubber bands or anything. They're just eight-millimeters thick, but the stunt is testing the rubber bands' power in numbers.
We're not going to spoil it for you, so scroll down to check out the video of the stunt.

Nissan hopes to inject some spice into Rogue with 'Open The Briefcase'

Nissan is in the midst of rolling out the redesigned 2014 Rogue and has launched an interesting social media game called Open The Briefcase. The video that launches this game depicts a simple ride-share gone very wrong, with a man getting embroiled in a high-speed chase in a bid to escape with a strange briefcase. Eventually, it all goes haywire, and the man and his driver are captured. The only question seems to be, what's in the briefcase?
The contest, which asks participants to select one of three briefcases by cracking a code, is set to reward three individuals with a new Rogue. New attempts can be made each day, and participants can get additional chances to open a briefcase by sharing the video. The contest kicked off on January 3 and will run until February 14. Hop over to the contest page on Facebook to take part, or just watch the video below and enjoy a bit of entertainment.