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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's Taxi of Tomorrow shut down by NYC courts [UPDATE]

Justice Schlomo Hagler may have just put a big dent in Nissan's plans to rule New York City's taxi fleets and outgoing Mayor Mike Bloomberg's vision of a unified fleet of yellow cabs.
As an October 28 deadline approached that would see all current, non-hybrid taxis replaced over by the Nissan NV200 over a three-to-five-year span, the legal battle that's enveloped the Taxi of Tomorrow program from the start has intensified. In a lawsuit, the Greater New York Taxi Association claims New York's Taxi and Limousine Commission overstepped its powers in mandating that taxi fleets are refitted with the NV200, according to the New York Daily News. This isn't the first time the courts have sided with the cabbies in the ToT debate.
Justice Hagler agreed with the cabbies, striking down the Taxi of Tomorrow purchasing requirements, and saying, "Simply stated, the power to contract and compel medallion owners to purchase the Nissan NV200 from Nissan for ten years does not exist in the City Charter," according to The Wall Street Journal.

Nissan shareholders oust Carlos Ghosn from board of directors

TOKYO — Nissan's shareholders approved on Monday the ouster from the Japanese automaker's board of its former chairman, Carlos Ghosn, who is facing allegations of financial misconduct. The approval, which was expected, was indicated by applause from the more than 4,000 people gathered at a Tokyo hotel for a three-hour extraordinary shareholders' meeting. Other votes had been submitted in advance. Ahead of the vote, Nissan's top executive apologized to shareholders for the scandal at the Japanese automaker and asked them to approve Ghosn's dismissal. Chief Executive Hiroto Saikawa and other Nissan executives bowed deeply in apology to shareholders attending the extraordinary meeting at a Tokyo hotel. Shareholders also approved the appointment of French alliance partner Renault SA's Chairman Jean-Dominique Senard to replace Ghosn. Renault owns 43 percent of Nissan. Senard, introduced to shareholders at the meeting's end, thanked them and promised to do his best to keep the automaker's performance on track. "I will dedicate my energy to enhance the future of Nissan," said Senard. The shareholders also gave a green light to removing from the board a former executive direct, Greg Kelly, who has been charged with collaborating with Ghosn in the alleged misconduct. Angry shareholders demanded an explanation for how wrongdoing on an allegedly massive scale had gone unchecked for years. The meeting was closed except to stockholders but livestreamed. One shareholder said Nissan's entire management should resign immediately. Saikawa said he felt his responsibility lay in fixing the shoddy corporate governance at Nissan first, and continuing to lead its operations. Another shareholder asked if Nissan was prepared for a damage lawsuit from shareholders since its stock price has plunged. "I deeply, deeply apologize for all the worries and troubles we have caused," Saikawa said. "This is an unprecedented and unbelievable misconduct by a top executive." He outlined the findings of an internal investigation, such as payments of a consultation fee to Ghosn's sister for 13 years. The investigation has also found too much power had been focused in one person, he said. Ken Miyamoto, 65, a Nissan shareholder, said he was disappointed. "It is really such a pity as he was a brilliant manager," Miyamoto said of Ghosn before heading into the meeting.