2011 Nissan Maxima on 2040-cars

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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.

Carlos Ghosn's new lawyer, 'the Razor,' starts slashing

TOKYO — Carlos Ghosn's new lawyer took aim at Nissan, prosecutors and courts on Wednesday, dismissing the charges against the ousted chairman as an internal company matter and saying Japan was out of step with international norms by keeping his client in jail. "This should have been dealt with as an internal matter," Junichiro Hironaka, nicknamed the Razor, said at his first press briefing. Ghosn, who was arrested in November over alleged financial misconduct and remains in detention in a Tokyo jail, picked a new team last week with long-time defense attorney Hironaka as a key member to replace Motonari Otsuru, a lawyer who once ran the prosecutor's office investigating him. Hironaka's combative style contrasts with the low-key approach adopted by media-shy Otsuru. Ghosn's switch to an aggressive legal strategy came after his attempts to win bail failed and just before lawyers were due to sit down with prosecutors and judges for the first time to hash out a schedule for pre-trial discovery meetings, where prosecutors will reveal evidence and submit a list of witnesses. Hironaka said he didn't know why Ghosn picked him, but added that Ghosn probably wanted an experienced criminal lawyer as the case moved toward trial. The 73-year-old defense attorney is reputed for winning high profile cases, including the acquittal of a senior lawmaker, Ichiro Ozawa, on financial misconduct charges. He also helped free a senior bureaucrat Atsuko Muraki who was jailed for four months on corruption charges fabricated by prosecutors. Yet, even with greater legal firepower the former Nissan Motor Co boss faces a criminal justice system where only three out of every 100 defendants pleading not guilty are acquitted. Neither does Japan have a plea-deal mechanism that would allow Ghosn to agree to lesser charges for a lighter sentence. "The change in lawyers means a change in style, but the legal strategy will still be the same. I don't think it increases Ghosn's chance of an acquittal," said Masashi Akita, a defense lawyer at Shin-Yu Law Office in Osaka, ahead of Wednesday's comments by Hironaka. Ghosn has lost his perch atop an automotive alliance trio of French carmaker Renault SA and Japanese automakers Nissan and Mitsubishi Motors Corp. Attempts to win bail, including an offer to wear a GPS ankle bracelet and hire security guards to stop him trying to tamper with evidence, failed.

Nissan's Kelly examined at Japanese hospital after securing bail

TOKYO — Nissan director Greg Kelly was being examined in a hospital on Wednesday, a source said, a day after he was released on bail from a Tokyo jail where his former boss Carlos Ghosn is still being detained. Kelly, an American who was released late on Christmas Day after more than a month in detention, has been charged with conspiring to under-report Ghosn's income. He posted bail of 70 million yen ($640,000). Their Nov. 19 arrests jolted the global car industry and has strained Nissan's alliance with French car maker Renault SA. Nissan's board last month fired Ghosn as chairman and Kelly as representative director, although both men technically still remain board members who can only be removed by shareholders. Kelly suffers from spinal stenosis, causing numbness, tingling and shooting pain in his extremities, according to a video message last week from his wife, Dee Kelly, appealing for his release. The condition compresses or pinches the spinal cord. Those symptoms worsened during his five weeks in the Tokyo Detention Center, his wife said, citing Kelly's lawyer. Kelly was scheduled to have surgery on Dec. 7 in Nashville, Tennessee, but flew to Japan last month after being told that he was needed in person at a board meeting, Dee Kelly said in the video. Kelly was arrested soon after his arrival. Under the conditions of his bail, Kelly is barred from traveling overseas and his residence must be restricted to a designated place, the Tokyo District Court said. Lawyers say that travel exceptions can be made on a case-by-case basis. Kelly walked out of the detention center around 10:45 pm (1345 GMT) Thursday night wearing a light-colored jacket and was whisked away in a black taxi. Japanese media showed footage of Kelly entering a hospital around midnight. After his release from detention, Kelly issued a statement through his lawyer saying he had not falsified any documents and looked forward to restoring his honor in court. "I believe my innocence will be revealed in the trial," he said. Kelly also said in the statement he wanted to see a doctor immediately and get the appropriate treatment or operation originally scheduled for early December. The office of his lawyer, Yoichi Kitamura, did not respond to requests for comment. Ghosn was re-arrested on Friday based on suspicions that around October 2008 he shifted personal trades to Nissan to make it responsible for 1.85 billion yen ($16.6 million) in appraisal losses, prosecutors said.