2001 Nissan Xterra Se Sport Utility 4-door 3.3l on 2040-cars

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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 giving away Leaf-shaped air fresheners that smell like the future

We had to check our calendar to make sure it didn't read April 1, but since it's not April Fool's Day, we have to assume that Nissan of Europe really has created a special air freshener scent to give away this Christmas. To create this original fragrance, Nissan looked to Dr. George Dodd, a master perfumer and aroma academy scientist who looks a tiny bit like Santa Claus (we seriously aren't making this stuff up).
Like a mad scientist, Dr. Dodd went to work blending chemicals and fragrances to design a smell that matches the Leaf's Earth-friendly, zero-emission attitude. Once the "scent of the future" is transformed into the lovely Santa-driving, Leaf-shaped air freshener you see above, Nissan of Europe will be giving one to its employees, Leaf customers and "select electric car fans." Sadly, EV - and scent - enthusiasts here in the US will be stuck with the tried-and-true pine tree air freshener.
We don't want to ruin exactly what Dodd finally came up with for the "scent of the future," but you can find out for yourselves in the video and press release posted below.

Nissan: We lose money on each Leaf replacement battery

Nissan has been playing its cards pretty close to its chest when it comes to the production costs for Leaf battery packs. The company recently put a price on replacement batteries for customers at $5,500 plus the requirement to return the old battery. If the decommissioned battery is worth $1,000 to Nissan, as they have stated, that means the battery costs about $6,500 to make, right? Maybe even less if Nissan wants to turn a profit, as automakers are wont to do? Wrong.
Green Car Reports spoke to Nissan about these battery costs, and found that the automaker actually loses money on selling the replacement battery for the Leaf at the current price. Jeff Kuhlman, Nissan's vice president of global communications said, "Nissan makes zero margin on the replacement program. In fact, we subvent every exchange." All you English majors will know that "subvent" is a fancy way to say "subsidize." Kuhlman added, though, "We have yet to sell one battery as part of the program."
The fact that Nissan offers its replacement batteries for less than it costs to manufacture them is telling of a company both cares about what its customer needs and is dedicated to the success of its product. In this case, both of those things encourage people to give up fossil fuels and adopt electric mobility, which is heartening. As more people switch to battery-powered driving, though, battery technology should become better and cheaper, and the scale of production should cause manufacturing costs to decrease. Eventually, Nissan could easily see itself breaking even selling the Leaf battery replacements.