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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.

200 Nissan Leafs recalled for faulty power inverters

Nissan is going full speed ahead with strong sales for its all-electric Leaf. Unfortunately, some of those Leafs had a glitch that could stop some of those Leafs from doing the same. Credit a faulty power inverter. US Department of Transportation says the faulty power inverters may cause some Leafs to shut down unexpectedly. Thankfully, the glitch affects just 196 Leafs, all of which were produced between April 15 and 24, 2014. Official DOT information on the recall is available here and it's also pasted below. Nissan started contacting Leaf owners in late May, instructing them to bring their vehicles to certified Leaf dealers for repairs, Nissan spokesman Brian Brockman told AutoblogGreen, adding that there'd been no cases of vehicle shut downs from the power inverter. Nissan confirmed the 196-vehicle figure and isn't charging the vehicle owners for the repairs. The company is also providing loaner vehicles at no cost. The recall marks a rare bit of bad news for Nissan's electrification efforts, as the Japanese automaker has been boosting sales of the Leaf all year. Through May, Leaf sales in the US were up 36 percent from a year earlier to 10,389 units, and May sales alone had surged 46 percent from a year earlier. In May, Chrysler recalled more than 4,141 Fiat 500e models from the 2013 and 2014 model years for a similar issue. Inverter modules on those vehicles may allow coolant to seep onto electrical components, which could cause a short circuit and power loss. The recall impacted cars built between September 2012 and April 2014. Report Receipt Date: MAY 16, 2014 NHTSA Campaign Number: 14V263000 Potential Number of Units Affected: 196 Manufacturer: Nissan North America, Inc. SUMMARY: Nissan North America, Inc. (Nissan) is recalling certain model year 2014 Nissan LEAF vehicles manufactured April 15, 2014, through April 24, 2014. Due to a problem with the motor control circuit board, the inverter may fail, causing the vehicle shut down. CONSEQUENCE: An unexpected vehicle shut down increases the risk of a crash. REMEDY: Nissan will notify owners, and dealers will replace the inverter, free of charge. The recall is expected to begin on July 7, 2014. Owners may contact Nissan customer service at 1-800-647-7261. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Watch Formula Drift Championship leader Chris Forsberg drift a 1975 Datsun 280Z

Chris Forsberg won the Formula Drift Championship in 2009, was in the catbird seat to win it last year until the final race of the season and started this year's season with a win at Long Beach. That is how he can be provide the example for Clarion USA's tagline, "Dream like a champion."
In this three-minute video for the audio components manufacturer, Forsberg gives up the race suit for a corporate suit, then takes time out of his commute to think about what he'd rather be doing. In a 1975 Nissan 280Z with a turbocharged 2.0-liter Skyline RBDET20 engine. We're sure this has never happened to any of you before.
You can watch how dream begins - and suddenly ends - in the video below.