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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 Leaf electric vehicle goes on sale in Mexico

Nissan chief Carlos Ghosn may not be intimately familiar with the Dean Martin 1962 classic South of the Border, but he may as well start crooning the standard now. The Japanese automaker said this week that the Nissan Leaf will officially be the first mass-produced battery-electric vehicle to be sold in Mexico. So break out the horn section. Nissan will start selling the Leaf through its Mexico City dealership network and is touting features such as the car's fast-charging port. That feature allows the car to be 80-percent charged in about a half hour. Nissan and the Mexican government are also working on an "electric corridor" of charging stations between Mexico City and Cuernavaca, which is about 55 miles to the south. There will also be "charging zones" in various districts throughout Mexico City, making it easier for the newly inaugurated EV drivers to charge up in town. Nissan has been working on Leaf brand exposure to Mexico City for years, sending the first batch of 100 all-electric Leaf taxis to Mexico starting in the fall of 2011. Last month, Nissan had its best ever month of sales in the US, moving 3,117 Leafs in May and the company has sold over 115,000 Leafs around the world. Check out Nissan's press release below. Nissan becomes the first company to sell a 100% electric vehicle in Mexico Nissan LEAF arrives in Mexico and becomes the first 100 percent electric vehicle to be comprehensively marketed in the country. The car of the future is already part of the present with more than 115,000 global sales. Nissan, the leader company in electric vehicles, strengthens its commitment to promote Zero-Emission mobility by opening charge centers distributed in Mexico. MEXICO CITY – Nissan today announced the launch of LEAF, the first 100 percent electric vehicle to be marketed in Mexico. The presale starts today and will continue until its arrival on June 30. Nissan LEAF is the first zero-emissions vehicle marketed in Mexico, confirming the leadership and the promise of the Japanese company to transform traditional driving into a new silent experience. "Nissan LEAF is a reality in the Mexican market," said Airton Cousseau, CEO of Nissan Mexicana. "We are proud to be the pioneer company to introduce the first zero-emissions vehicle leader in sales worldwide in Mexico.