2004 Nissan Pathfinder Armada Se 4wd on 2040-cars

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Nissan-Renault mule teases mysterious subcompact

There's always something intriguing about a mystery, especially of the automotive kind, and that's exactly what we have here. Our spies recently spotted this Nissan-Renault test mule on the road in Southern Europe. But what, exactly, are they testing? From the front end, it's clear this mule started life as a Nissan Versa Note, but check it out in profile to see the cut down rear doors. They're significantly shorter than on the production car, and the wheelbase isn't as long here, either. The tacked on fender flares suggest a wider track than stock, too. Making things even more complicated is the bizarre cladding this subcompact hatch is wearing. The odd tumors on the hood and blistered side panels indicate that the automaker is trying to keep the design underneath a secret. Given Renault and Nissan's tight relationship, it also isn't clear which company is testing this model. While the body comes from the Note, this one is wearing French license plates. According to our spies, the vehicle was also spotted leaving a Renault testing location. There are some possibilities, though. Renault already has the new Twingo out, and the next-gen Megane has an imminent release. The French brand could now be at work on a future Clio. Alternatively, Nissan is reportedly using the Sway concept as inspiration for the upcoming Micra, and we could be getting a preview here. Give us your best guess in Comments. Related Video:

Nissan tests 'self-cleaning' paint on Leaf models in Europe

Once upon a time, self-cleaning ovens were all the rage. Now, Nissan thinks the concept may apply to its vehicles. And the Japanese vehicle maker is testing it out on some of its Leaf battery-electric vehicles Europe, no less. Nissan says its trying out what's called a "superhydrophobic and oleophobic" paint on Leaf battery-electric vehicles for testing and demonstration purposes. The paint, produced by UltraTech International Inc., is designed to repel splats of liquid such as oil or standing water away from the car's surface. The paint, called Ultra-Ever Dry, does this by creating what Nissan says is a layer of air around the vehicle surface. We imagine there's a detailed chemical explanation for this phenomenon that would better explain this process, but that's the best way we can explain it. Right now, Nissan is pitching the product testing as a way to further the Leaf's reputation as what the automaker calls "the world's cleanest car." That said, the paint hasn't been tested in North America, and no plans have been made to add the feature as either a standard or optional goodie for the battery-electric vehicle. Still, go ahead and check out Nissan's press release on the magic paint below. Nissan Creates "World's Cleanest Car" – a Zero Emissions Nissan LEAF with Self-Cleaning Nano-Paint Technology For LEAF owners who never qualify for gas stations' "Free Car Wash with Purchase" offers, this technical study might be the perfect solution July 09, 2014 10:00 AM Eastern Daylight Time NASHVILLE, Tenn.--(BUSINESS WIRE)--What do you get when you combine the world's best-selling zero emission vehicle with innovative paint technology that repels mud, rain and everyday dirt? Answer: A very special Nissan LEAF electric vehicle that might just be the "world's cleanest car." "No matter what the road throws at this LEAF, its Ultra-Ever Dry® exterior coating will throw right back" Created to demonstrate its potential use in future production vehicles, this Nissan LEAF's exterior was treated with a specially engineered superhydrophobic and oleophobic paint that is designed to repel water and oils. The "self-cleaning" paint, called Ultra-Ever Dry®, creates a protective layer of air between the paint and environment, effectively stopping standing water and road spray from creating dirty marks on the LEAF's surface. Nissan is one of the first carmakers to apply this technology to a vehicle.

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.