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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.

Renault to propose joint holding company with Nissan, Nikkei reports

TOKYO — Renault SA will propose to Nissan Motor Co a plan to create a joint holding company that would give both firms equal footing as the French automaker seeks further integration with its Japanese partner, the Nikkei newspaper reported on Friday. Under the proposal, both firms would nominate a nearly equal number of directors to the new company in which ordinary shares in both Nissan and Renault would be transferred on a balanced basis, the newspaper said, without citing sources. This would effectively dilute the stake held by the French government in Renault to around 7-8 percent, from its current 15 percent, it added. The new company would be headquartered in a third country, such as Singapore. Renault plans to make the proposal to Nissan soon, the Nikkei said, having modified an earlier merger idea that Nissan rejected on April 12. Nissan declined to comment on the issue. The Financial Times newspaper reported that both Nissan and the Japanese government have refused to engage in merger talks with Renault. The report of the proposal comes as the outlook for the alliance — one of the world's top automaking partnerships — has clouded since the arrest in November of its main architect, Carlos Ghosn, for suspected financial misconduct. It also comes as Nissan's financial performance struggles following years of focusing on volume sales over building its brand, particularly in the United States, its biggest market. Nissan slashes its forecast This week, the Japanese automaker slashed its profit forecast for the year just ended to its lowest in nearly a decade, citing weakness in its U.S. operations. Renault for years has been vying for a closer merger with Nissan, which it rescued from the brink of bankruptcy two decades ago. Ghosn had been working to achieve a deeper integration before his arrest on financial misconduct charges in November last year. While the automakers have been consolidating many of their operations over the past decade, including procurement and production, many executives at Nissan have opposed an all-out merger with Renault. Instead, Nissan has argued for a more equal footing with Renault, which holds a 43 percent stake in its bigger partner. Nissan holds a 15 percent stake in Renault. It was unclear whether Renault would hold the casting vote in major decisions at the new company, as it did in Renault-Nissan B.V., a strategic management company jointly held by both companies that oversaw operations for the partnership.

FCA scion John Elkann tries to pull off a Marchionne-sized merger

MILAN, Italy — When John Elkann lost his ally last year with the sudden death of Sergio Marchionne, some questioned whether the softly-spoken scion of the Agnelli clan would be able to emerge from his shadow to ensure Fiat Chrysler's future. But New York-born Elkann, who became Fiat chairman in 2010, acted decisively to fill the vacuum left by the larger-than-life Marchionne and get closer to the big merger deal the legendary executive was unable to deliver. At just 28, Elkann was thrust into the role of Fiat vice chairman after the deaths of his grandfather and great-uncle "because there was really nobody else" to take the wheel. For Elkann, who got his first taste of the car industry as an intern at a factory producing headlights in Birmingham, England, the first 18 months with responsibility for the family-owned carmaker and its long heritage were "terrible." But from that low point, Elkann, 43, is now trying to merge Fiat Chrysler (FCA) with French rival Renault to form the world's third largest carmaker and tackle new challenges facing the industry. Elkann will become chairman of the merged FCA-Renault if the deal goes ahead, ensuring the Agnelli dynasty plays a central role in the next chapter of automotive history. At an event in Milan on Monday, the usually-shy Elkann looked happy and confident. His first big break came with an instrumental role in persuading Marchionne, who was running one of the businesses owned by the Agnelli family, to become chief executive in 2004 and give Fiat "a new start," Elkann said in a "Masters of Scale" podcast last year. Fiat was at the time almost on the brink of collapse. This involved a "very long night ... and many grappas" but proved to be a turning point in the fortunes of the Italian company founded by Elkann's great-great-grandfather Giovanni Agnelli, which built its first car in 1899. In 2005, Elkann backed Marchionne in negotiating the breakup of an alliance Fiat had entered into with General Motors in 2000, receiving $2 billion from GM in return for canceling a deal that could have required GM to buy the remainder of Fiat Auto. Marchionne then used GM's money to fund a turnaround at Fiat, which involved taking the Italian carmaker into a transformation alliance and then full-blown merger with U.S. automaker Chrysler as Elkann agreed to the Agnellis loosening their grip.