2007 Nissan Murano on 2040-cars

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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.

Nissan sues Ghosn's sister while Renault finds no irregularities in his pay

Nissan sued ousted chairman Carlos Ghosn's sister on Tuesday in a Rio de Janeiro court for "unjust enrichment," according to judicial records seen by Reuters. The suit is the latest twist to a bitter legal fight between Ghosn and Nissan over the contents of a beachfront apartment that the former executive used during his trips to Brazil. Brazilian-born Ghosn is accused of having underreported his income while leading the Japanese carmaker and diverting company funds for his personal use. He is being held in a prison in Japan and the carmaker says there might be evidence of his alleged crimes in the Rio apartment. Additional details regarding the unjust enrichment suit were not immediately available and it was unclear how long it might take to resolve the case. A representative for the Ghosn family did not have an immediate comment. The Japanese press had already reported that Ghosn's sister, Claudine Bichara de Oliveira, could be embroiled in the scandal. Yomuri, Japan's largest daily by circulation, reported in November citing unnamed sources that Nissan's internal investigation had found that Ghosn instructed the company since 2002 to pay some $100,000 a year to his elder sister. The compensation was supposed to be for a role as an adviser. The paper added that Bichara de Oliveira had in fact been living in and managing the Rio apartment that Nissan had bought for the use of Ghosn and that she had done no advisory work for the car maker. Meanwhile, Renault issued a preliminary report indicating that an audit launched in the wake of Chairman and CEO Carlos Ghosn's arrest in Japan had so far found no irregularities with his pay at the French carmaker. Ghosn was charged on Monday in Japan for failing to declare deferred income he had agreed to receive from Nissan, for the five years ending March 2015. There is speculation that Nissan itself may be indicted in Japan as part of the case against Ghosn. While Nissan fired Ghosn days after his Nov. 19 arrest, Renault has resisted pressure to replace him permanently. The Renault board also "noted that, at this stage, it does not have information concerning Carlos Ghosn's defense," the company said after its meeting, which had long been scheduled to discuss 2018-19 financial accounts. During the five-hour session, several directors led by Cherie Blair, wife of the British former prime minister Tony Blair, began to express impatience with that position, two people with knowledge of the matter said.

2014 Nissan Versa Note pushes the little hatchback forward

Alright, truth time: The Nissan Versa isn't exactly our favorite car in the subcompact class. It's certainly competent, reliable transportation, but it's hardly an emotional purchase choice. Perhaps this new version of the Versa, then, can change our minds a bit. Meet the Versa Note - the cuter, five-door version of the li'l sedan, making its debut here at the 2013 Detroit Auto Show.
Aesthetically, the Versa Note is a pretty pleasant-looking thing; we've seen it before in JDM-spec. It's a decidedly aerodynamic thing, too, with a drag coefficient of just 0.29. And because of that - as well as an efficient little powertrain - the Note will achieve up to 40 miles per gallon on the highway.
Under the hood is Nissan's 1.6-liter inline four-cylinder engine churning out a furious 109 horsepower and 107 pound-feet of torque. Like, well, every other Nissan car, the Versa is equipped with a continuously variable transmission and will drive the front wheels exclusively. Base S models can be had with a five-speed manual transmission, but the moment you step up to a higher trim level, the do-it-yourself shifter goes away.