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NHTSA probing whether to call Nissan to the carpet over Versa unintended acceleration

The Nissan Versa and Versa Note may have a carpeting problem that could make the little cars risky to drive. The National Highway Traffic Safety Administration is launching a preliminary evaluation into the 2012-2014 model year versions of the Versa, Versa Sedan and Versa Note, affecting an estimated 360,000 vehicle. In these vehicles, it's possible that the driver's foot could be caught where the carpet meets a trim panel near the accelerator. The regulator has four reported instances of the issue, but it's still collecting data from Nissan about any further cases.
According to the complaints, the tunnel carpet cover trim panel can possibly snag the drivers' right shoe where it meets the carpet, and can either keep their foot on the accelerator or prevent moving it to the brake pedal. In one case, the problem was bad enough that the driver had to free his foot using his hand, while driving. In two of the four reported cases, the vehicles were rental cars.
This is actually the second ongoing preliminary evaluation for some of these models. In late May, NHTSA started looking into the 2013-2014 Versa and 2014 Versa Note for long brake pedal travel.

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 shares slide 5% after report Renault exploring stake reduction

TOKYO — Shares of Nissan Motor Co slumped 5% on Monday, their biggest fall in more than a month, following a report that top shareholder Renault may consider lowering its stake in the Japanese automaker. Bloomberg reported on Friday that Renault may consider lowering its Nissan shareholding as part of plans to separate its electric vehicle business. The French car maker has been pushing ahead with plans to split its electric and combustion-engine businesses in an attempt to catch rivals such as Tesla and Volkswagen On Friday, Renault said all options were on the table for separating the electric vehicle business, including a possible public listing in the second half of 2023. Any plans would be subject to approval from alliance partner Nissan, Renault finance chief Thierry Pieton said, adding the Japanese automaker was "in the loop" as Renault weighed up its options. Renault and Nissan have declined to comment on the report. Shares of Nissan fell to 509.8 yen in Tokyo, marking their biggest one-day decline since early March and underperforming an almost 2% drop in the Nikkei index. The car makers' two-decade-old alliance, which includes Mitsubishi Motors, was rocked by the 2018 ouster of alliance founder Carlos Ghosn amid a financial scandal. They have since pledged to pool more resources. In January they said they would work more closely together to make electric cars. They detailed a $26 billion investment plan for the next five years. But their unequal relationship has long been a source of friction in Japan. Renault owns 43.4% of Nissan, which in turn has a 15% non-voting stake in its shareholder. Renault bailed out Nissan two decades ago, but is now the smaller automaker by sales. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Earnings/Financials Green Mitsubishi Nissan Renault