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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.

This Leaf glows in the dark

Pessimists may say that it's weird to have an all-electric vehicle look like it's radioactive. But when it comes to an effort by Nissan Europe to publicize the idea of using solar energy to power one's house or car, that'd be missing the point. Either way, the car looks pretty cool. Nissan is looking to get more people to go solar across the pond, and has given an all-electric Leaf a special glow coating to get the point across. Nissan worked with inventor Hamish Scott to create a special coating that allows the Leaf's paint job to absorb enough sunlight to give off a glow for as long as 10 hours of darkness. Go up to the Nordic countries, and that's still not long enough to get through a winter's night, but for most of the Continent, that'd certainly be sufficient. Better yet, the coating, which catches ultraviolet energy, is fully organic, though it'd take some smart science people to figure out how that's the case. But the coating is said to last a quarter century, which is a little longer than Leaf batteries are expected to last. Check out Nissan's press release below and take a look at the 55-second video from Nissan UK. The manufacturer worked with inventor, Hamish Scott, creator of STARPATH, which is a spray-applied coating that absorbs UV energy during the day so that it glows for between eight and 10 hours when the sun goes down. While glowing car paint is already available, as are glow-in-the-dark car wraps, the bespoke, ultraviolet-energized paint created especially for Nissan is unique thanks to its secret formula made up of entirely organic materials. It contains a very rare natural earth product called Strontium Aluminate, which is solid, odorless and chemically and biologically inert. Feb. 12, 2015 Nissan in Europe is first car maker to apply glow-in-the-dark car paint EV pioneer Nissan is first manufacturer to partner with similarly innovative inventor to create paint that uses UV energy absorbed during daylight to glow at night Increasing numbers of LEAF owners expanding sustainability efforts by installing solar panels to their homes ROLLE, Switzerland – Nissan in Europe has become the first manufacturer to apply glow-in-the-dark car paint to showcase how its market-leading, all-electric LEAF is helping more and more people convert to solar energy at home Various third-party companies have applied non-organic glow-in-the-dark paint to vehicles before, but Nissan is the first car maker to directly apply such technology.

DIY fix to lost reverse gear is cheaper than a new transmission

Sometimes in life money gets tight, and the funds just aren't there to make a repair on your vehicle. What proves someone's mettle is how that person deals with it, and this guy deserves a medal for his ingenuity. According to the YouTube description, the man's Nissan Pathfinder lost reverse gear, and this system of chains and rollers has been his fix until he can really get it repaired. Trying this stunt in a crowded parking lot could get a little scary, but for leaving home, this might be all you would need. Also, we have to applaud the father/son bonding on display in this clip. The driver's kid acts as lookout to tell dad when the SUV gets on the rollers. That little boy now has a story to impress his friends for years to come. News Source: hexdude24 via YouTube Auto News Nissan Auto Repair Maintenance SUV Videos viral video nissan pathfinder gearbox reverse