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Infiniti Q50 sedan recalled over steering software glitch

The Basics: Infiniti will recall around 60,000 Q50 sedans globally due to a glitch in the software that controls the cars' direct adaptive steering system. It's this hardware and software that allows the Q50 to steer itself autonomously under certain conditions. A total of 28,182 Q50 sedans will be recalled in the US, with another 3,804 in Canada. We're not certain yet which model years will be recalled, but the direct adaptive steering debuted in 2014. The Problem: According to Infiniti spokesperson Stefan Weinmann, "in certain rare circumstances, just after starting the vehicle" a software glitch "can lead to a lack of steering responsiveness and change in turning radius." Injuries/Deaths: None reported. The Fix: Infiniti hasn't yet announced how it will fix the issue, but a software update seems likely. That means a trip to the dealership. If you own one: Expect to hear from the manufacturer later this month or next. Related Video: Featured Gallery 2017 Infiniti Q50S 3.0t Recalls Infiniti Safety Technology Autonomous Vehicles Sedan infiniti q50

Nissan CEO Hiroto Saikawa resigns, successor to be named

YOKOHAMA, Japan — Nissan Chief Executive Hiroto Saikawa tendered his resignation Monday after acknowledging that he had received dubious income and vowed to pass the leadership of the Japanese automaker to a new generation. Board member Yasushi Kimura told reporters at an evening news conference at company headquarters in Yokohama that the board has approved Saikawa's resignation, effective Sept. 16, and a successor will be appointed next month. A search is underway, he added. Calls for Saikawa's resignation, which arose after the arrest last year of his predecessor, Carlos Ghosn, on various financial misconduct allegations, have grown louder after Saikawa acknowledged last week that he had received dubious payments. The income was linked to the stock price of Nissan Motor Co., and he has said his pay got inflated by illicitly adjusting the date for cashing in. The automaker's board met to look into the allegations against Saikawa, as well as other issues related to Ghosn's allegations and corporate ethics at the company. Kimura said the income Saikawa had received was confirmed as "not illegal." Ghosn, who is out on bail and awaiting trial, says he's innocent. Kimura and three other board members, who all have backgrounds outside the company, said their investigation of the scandal over Ghosn's arrest found that alleged misconduct by Ghosn and Greg Kelly, a former board member who was also arrested, had caused 35 billion yen ($350 million) in damage to the company. Nissan will seek a repayment of the damages, Kimura said. The board said about 10 candidates are being considered as a replacement for Saikawa. They did not identify them, but said outsiders and non-Japanese are on the list. Until a successor is decided, Chief Operating Officer Yasuhiro Yamauchi will serve as interim chief, the board said. Saikawa has not been charged. "I have been trying to do what needs to be done so that I can pass the baton over as soon as possible," he told reporters earlier in the day, referring to his willingness to leave his job. Saikawa did not appear at the news conference initially, but the four board members who led the event said he would later. Saikawa has said he didn't know about the improprieties, promised to return the money and blamed the system he said Ghosn had created at Nissan for the dubious payments. Japanese media reports said Saikawa had received tens of millions of yen (hundreds of thousands of dollars) in extra compensation.

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.