2018 Nissan Kicks Sv on 2040-cars

Auto blog

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.

Renault-Nissan zero-emissions car sales whir past 100,000 [w/video]

The electric vehicle has gone gold at Renault-Nissan, clocking 100,000 sales in a three-year period that began with the first Nissan Leaf being sold in Silicon Valley, California in 2010. Since then, the Leaf has become the EV champion of the world, selling more than 71,000 units so far, the majority of those in the US. The 100,000th EV sold by the Alliance was also a Leaf and also sold in the US, but on the other side of the country, in Georgia.
By comparison, Renault has sold 30,000 electric vehicles since late 2011, looking after other segments of the EV market with the Kangoo Z.E., Zoe, Twizy and Fluence Z.E. The alliance estimates that its efforts have been driven 5.2 million ion-powered miles and saved 14 million gallons of oil since they appeared. For a bit of sobering context, the US averaged 18.83 million barrels of oil per day in 2011, which is almost 791 million gallons. Per day.
So we're getting there, albeit slowly. Quietly. There's a press release and a video below with more details on the achievement.

Nissan reportedly rejecting Renault proposal for closer ties

TOKYO — Nissan Motor Co Ltd will reject a management integration proposal from French partner Renault SA and will call for an equal capital relationship, the Nikkei newspaper said on Monday, citing sources. Nissan's management feels the Japanese company has not been treated as an equal of Renault under existing capital ties, and a merger would make this inequality permanent, the Nikkei reported. The outlook for the alliance — one of the world's top automaking partnerships — has been in focus since the arrest in November of its main architect, Carlos Ghosn, on charges of financial misconduct. The former Nissan and Renault chairman has denied the charges against him and has said he was the victim of a boardroom coup by Nissan executives opposed to closer ties. To which, Bloomberg reported that it has seen emails in which Nissan executives were working with Japanese government officials to defend the company's independence, as Ghosn was pushing for a full merger. The emails indicate growing concern at high levels of the Japanese government, in the months before Ghosn's arrest, that his merger efforts would boost Renault and its largest shareholder, the French government, and harm Nissan, in a relationship the Japanese already saw as lopsided. The emails indicated a desire to keep the existing structure of the alliance with a "re-balancing of the shareholding" to reduce Renault's 43 percent stake in Nissan, and stated that Nissan's independence "should be respected." Nissan declined to comment directly on the emails, while reiterating that misconduct by Ghosn and his former aide, Greg Kelly, is "the sole cause of the chain of events." Renault saved Nissan from the brink of bankruptcy two decades ago and under their current capital alliance, the French company holds greater control over its much larger partner. Nissan Chief Executive Hiroto Saikawa declined to say whether the company had received a merger proposal from Renault. "Now is not the time to think of such things," he told a group of reporters outside of his house in Tokyo. "At the moment we are focused on improving Nissan's earnings performance. Please give us time to do that." Renault declined to comment on the report. Renault has argued in its proposal that an integration would maximize synergies within the French-Japanese alliance, according to the Nikkei. The Financial Times reported last month of Renault's intention to restart merger talks with Nissan within 12 months.