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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.

Autoblog fan favorite car ads from Super Bowl XLIX

Super Bowl XLIX is in the books, and the New England Patriots emerged victorious. Of course, if you're like us, the big game wasn't so much about the battle between the east coast and west, so much as a fight between the world's automotive advertisers. We collected and collated all of last night's new ads and put them together for you to vote on. And yes, we're limiting this year's contest to last night's new features. That's why you aren't seeing Dodge's epic Wisdom among our collection of commercials, and it's a similar story with Chevrolet's Truck Guy Focus Group series, which highlights the new Colorado. You can still vote for your favorites. We won't be closing the voting on our Super Bowl page, so while the winners and losers are correct as of this writing, it's entirely possible that there could be some changes in the rankings as time goes on. So, without any further ado, here are the winning ads based on your voting. Nissan: With Dad Fiat: Ready For Action Jeep: Beautiful Lands BMW: Newfangled Idea Mercedes-Benz: Fable NASCAR: America Start Your Engines As for those ads that failed to impact you, loyal readers, Toyota was the absolute, undisputed loser. The Japanese brand ran four ads in total – two for Toyota and two for Lexus – and all of them have negative tallies as of this writing. Lexus' Make Some Noise and Lets Play and Toyota's One Bold Choice and My Bold Dad both had very weak showings among the commercials that aired, although they weren't alone. Neither Mazda nor Kia scored particularly well, despite featuring celebrity magic act Penn and Teller and former James Bond, Pierce Brosnan, respectively. Chevrolet was the winner of the losers, as of our writing, recording the fewest downvotes for its audience-punking The Big Game ad. If you want to take a second look at the losing ads, you can head back to our Super Bowl page for the complete collection. But for now, head into Comments and let us know what you think of the results.

Carlos Ghosn changes to hotshot attorney and a new defense strategy

TOKYO — Carlos Ghosn's chief defense attorney Motonari Otsuru resigned and was replaced by a team that includes hotshot lawyer Junichiro Hironaka, in a change of strategy from the ousted Nissan Motor chairman three months after his arrest. Ghosn, Nissan's one-time savior, has been held in detention since his Nov. 19 arrest. He's been indicted and accused of under-reporting his salary and breach of trust. He has denied the charges. The once-feted auto executive hired Hiroshi Kawatsu as head of a new defense team, his office said on Wednesday. Hironaka, 73, has won several high profile cases, helping acquit senior lawmaker Ichiro Ozawa and senior bureaucrat Atsuko Muraki. Hiring Hironaka would mean a more aggressive legal strategy, said Nobuo Gohara, a former prosecutor. Otsuru previously led the special prosecutors' office that is now handling Ghosn's case. "Otsuru was miscast. He worked at the heart of the special prosecutors office so he was not someone who was going to go after them aggressively," Gohara said. "Hironaka is an experienced defense lawyer who has won a number of cases. He will mount a more thorough and aggressive defense." Otsuru's office confirmed his resignation in a statement, but gave no reason for the move. A second member of Ghosn's defense team, Masato Oshikubo, had quit, it said. Go Kondo, Ghosn's third defense lawyer, was unavailable for comment. Ghosn released a short statement thanking Otsuru for his team's "tireless and diligent work," and called him a "very capable and intelligent man and lawyer." The sudden change in attorneys comes ahead of the expected start of informal meetings with prosecutors and judges to discuss pretrial preparations, an indication that there will be no new charges against Ghosn. "As we begin the trial phase, I have decided to engage Hironaka-sensei as my legal counsel," Ghosn said, using an honorific suffix. "I look forward to defending myself vigorously, and this represents the beginning of the process of not only establishing my innocence but also shedding light on the circumstances that led to my unjust detention." Ghosn, 64, told the Nikkei newspaper last month that Nissan executives opposed to his plans for closer ties with automaking partner Renault SA had plotted to remove him. Ghosn was widely credited with rescuing Nissan from near-bankruptcy after he was brought over to Japan in 1999 by Renault after the French automaker bought a chunk of Nissan.