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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.

Lawyer for Ghosn slams bail condition as human rights violation

TOKYO (AP) — The lawyer for Nissan's former chairman Carlos Ghosn on Saturday criticized a bail condition that prevents his client from seeing his wife, as Ghosn awaits trial on financial misconduct charges. A judge has forbidden Ghosn from seeing his wife, Carole, including in the presence of lawyers, or talking to her on the phone. Prosecutors say the restriction is needed to prevent evidence tampering. "This is unfair," Takashi Takano, the lawyer, said in a phone interview, calling it a human rights violation. "It's cruel and unusual." His earlier appeal of the ban, rejected by district and appeals courts, went to the Supreme Court, which turned it down last month. The Supreme Court decision cannot be appealed, but Takano vowed to keep filing new petitions, stressing that the Supreme Court has not yet ruled on the constitutionality or the human rights aspects. The next one will be filed within two or three weeks, he said. Ghosn's lawyers recently filed a second petition with the U.N. Working Group on Arbitrary Detention, arguing that the restrictions on seeing his wife amount to a deprivation of fundamental human rights. Takano acknowledged that the situation looks dismal, as Japan's Supreme Court is not easily influenced by other governments' views or by public opinion. "Even the strongest man in the world can be stressed, psychologically damaged. That's very natural as a human being," said Takano, noting that Ghosn was holding up well compared to other clients he has had. Ghosn has been aggressively taking part in meetings with his defense team, according to Takano. The case has entered the stage known as "pre-trial sessions," during which both sides hand in evidence. A trial date has not been set. In Japan, preparations for trials routinely take months. Ghosn, who led Japanese automaker Nissan Motor Co. for two decades, was arrested in November and charged with falsifying financial documents in reporting retirement compensation, and with breach of trust in diverting Nissan money toward personal investment losses and a company effectively run by him. Ghosn, 65, a Brazilian-born Frenchman of Lebanese ancestry, has repeatedly said he is innocent, accusing some at Nissan of plotting against him and opposing a plan to merge Nissan with French alliance partner Renault. Renault is set to vote Tuesday on a possible merger with Fiat Chrysler.

Is the Chevy Camaro Z/28 a Godzilla Slayer at the track?

Godzilla. It's a name that strikes fear in the minds and hearts of giant monsters (Mothra!) worldwide, not to mention a number of automobile manufacturers that produce high-performance coupes... including Chevrolet. The Bowtie-cladded company has one rather obvious model that lines up squarely in the sights of the Nissan GT-R, that being the Corvette.
Interestingly, though, Chevy's halo coupe isn't the vehicle the boys from Motor Trend decided to match up at Barber Motorsports Park against the Japanese Godzilla, opting instead for the brand-new Camaro Z/28. A glance at the spec sheet of the Z/28 clears up any consternation regarding MT's choice - more horsepower for the Nissan, more torque for the Chevy and roughly the same weight means they are on pretty equal ground when it comes to what's under the hood.
The rest of the spec sheet looks to tilt the argument in the GT-R's favor (especially considering that MT's test car is a Track Edition model), as it boasts all-wheel-drive traction, a quick-shifting six-speed dual-clutch transmission and a price tag that's about $40,000 higher than that of the Z/28. Oh, and don't forget the GT-R's legendary computer-controlled reflexes. Does any of that matter with a professional race car driver like Randy Pobst behind the wheel? Scroll down and watch the video to find out.