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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.

Infiniti replaces Americas chief

The Nissan-Renault alliance has been something of a revolving door for high-level executives of late, and the latest shakeup comes at its luxury unit, Infiniti, where Michael Bartsch (shown above) has been replaced as vice president of its Americas division by Randy Parker. Bartsch had a short tenure – he only took the helm in September 2013. In a press release, Infiniti said he was leaving to "pursue other interests." Bartsch, a veteran of more than 30 years in the auto industry, came to Infiniti from Porsche. Parker comes from within the Nissan empire, formerly heading up the company's sprawling west region, including its marketing, distribution and dealer network. Before that, he served stints at GMAC and General Motors. Bartsch isn't alone in leaving Renault-Nissan recently. Ex-Renault COO Carlos Tavares took the top spot at Peugeot, Infiniti boss Johan de Nysschen left for Cadillac and Nissan executive vice president Andy Palmer took over at Aston Martin. Scroll down for the full press release from Infiniti. Feb. 17, 2015 Infiniti Motor Company announces leadership change at Infiniti Americas NASHVILLE - Infiniti Motor Company, Ltd. today announced a leadership change at Infiniti Americas aimed at growing the brand's presence in the U.S. Randy Parker is appointed Vice President, Infiniti Americas, effective immediately. He succeeds Michael Bartsch who will leave the company to pursue other interests. Most recently, Parker, 48, was Vice President, Nissan West Region, Nissan North America, Inc. "Randy has been a key contributor to the growth of Nissan in the United States," said Jose Munoz, chairman, Management Committee, Nissan North America and executive vice president, Nissan Motor Co., Ltd. "He has overseen strong growth for the Nissan brand in our western region, and we look forward to the skills that he will bring to Infiniti." "It is our pleasure to welcome Randy Parker to Infiniti," said Roland Krueger, president of Infiniti Motor Co., Ltd. "Randy will be responsible for accelerating Infiniti's progress in our largest worldwide market and driving our brand transformation as we execute an expanded product portfolio of premium luxury products." Most recently, Parker was responsible for regional marketing, distribution, dealer network development and financial controls for Nissan's largest U.S. regional operation.

Nissan itself will be indicted alongside Ghosn, report says

Prosecutors in Tokyo are expected to file charges against Nissan itself alongside an expected indictment against former Chairman Carlos Ghosn as part of the ongoing financial misconduct case. That's according to a report from Japan's Nikkei business daily, which does not identify its sources. Charges are also likely against Greg Kelly, a member of Nissan's board of directors who was taken into custody with Ghosn Nov. 19 after Japanese authorities questioned the former chairman aboard a corporate jet at the Tokyo Haneda airport. Monday is the deadline when prosecutors must either indict the two executives, release them or arrest them on new allegations. Both men are accused of under-reporting salaries in five annual reports that stretch through the fiscal year that ended in March 2015. The Nikkei says they'll also be arrested on new allegations of misstating financial information for the subsequent three business years. Nissan would be charged for not preventing the alleged crime. Both men have reportedly denied the allegations. In response to the Nikkei report, a spokesman for Nissan told Automotive News the company had "identified serious misconduct related to the reporting of Mr. Ghosn's compensation" and was cooperating with investors. The turmoil over Ghosn prompted the automaker to scrap plans to unveil a long-awaited longer-range Leaf electric car at the L.A. Auto Show last week. Ghosn is accused of conspiring to understate his income by about half the 10 billion yen (about $88 million) over the period. Reports say the issue relates to deferred compensation that Nissan CEO Hiroto Saikawa reportedly signed off on but may not have understood. The company didn't report the deferred compensation in Japanese securities filings as it is required, since the money is considered a future liability against the company. Automotive News cites an unnamed source who says Nissan has identified some $80 million in unreported deferred compensation promised to Ghosn. Nissan's board voted Nov. 22 to oust him as chairman, and Mitsubishi followed suit days later. Ghosn remains the CEO and chairman of Renault, however. Under Ghosn's guidance, Nissan and Renault joined forces in 1999 when Nissan was teetering toward bankruptcy. Mitsubishi joined on in 2016, with all three members able to jointly develop products and control costs. He had reportedly been pushing for deeper ties, including a possible merger between Nissan and Renault at the urging of the French government.