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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 Q60 to pack upwards of 400 horsepower

Infiniti turned heads when it unveiled the Q60 Concept at the Detroit Auto Show last month. While the concept coupe was revealed with a new 3.0-liter twin-turbo V6, the Japanese luxury automaker didn't indicate how much power it would produce. But now we may have our first indication. Speaking with an unidentified source at Infiniti during the Canadian International Auto Show in Toronto, AutoGuide reports that the production Q60 will arrive late in 2016 and pack at least 400 horsepower. A higher-output version of the same engine, however, could produce as much as 450 hp. That would still be significantly less than the Q50 Eau Rouge, which packed the larger 3.8-liter twin-turbo V6 from the Nissan GT-R with 560 hp. It would put it right on pace with the likes of the BMW M4 (with 425 hp) and perhaps more importantly, the Lexus RC F (with 450 hp). Related Video:

Japan sends official to Lebanon over fugitive Carlos Ghosn

BEIRUT — Japan's deputy justice minister met top officials in Lebanon on Monday over the case of NissanÂ’s fugitive ex-boss, Carlos Ghosn, who fled to his home country late last year while on bail in Japan and awaiting trial. Ghosn was arrested in late 2018 and is facing charges of under-reporting income and breach of trust. He says he is innocent. He led Nissan for nearly 20 years. State Minister of Justice Hiroyuki Yoshiie (pictured above with Lebanese Justice Minister Marie Claude Najm) met President Michel Aoun as well as the Lebanese minister of foreign affairs. Yoshiie did not speak to reporters after the meetings and is scheduled to hold a news conference later in the day. Aoun's office said in a tweet after the meeting that they discussed mutual relations and ways of developing them "in addition to matters that are of interest for both countries." The tweet did not mention Ghosn, who made his first public appearance in Lebanon in early January saying he fled a “nightmare” that would not end and vowed to defend his name wherever he can get a fair trial. On Friday, Japan's Justice Minister Masako Mori said she was dispatching the official to Beirut to explain the Japanese justice system and improve cooperation. She said Japan hoped Lebanon would gain “a proper understanding of the Japanese criminal justice system.” Japan and Lebanon do not have an extradition treaty, and it's unlikely Lebanon would agree to send Ghosn, considered a Lebanese national hero, back to Japan to face trial. Mori acknowledged that there were “various environments” and laws that underpin each country's stance. Nissan, maker of the Leaf electric car and Z sports car, said in a statement regarding the justice officialÂ’s trip that it hoped Ghosn would return to Japan to stand trial, “so that all the facts can be properly established under JapanÂ’s judicial system.” Having spent months in detention and struggling to gain his release on bail under stringent conditions, Ghosn said he fled in the belief he could not get a fair trial in Japan. Japan has requested GhosnÂ’s return through Interpol and issued an arrest warrant after his escape. Lebanese prosecutors issued a travel ban for Ghosn in January and asked him to hand in his French passport following the Interpol-issued notice against him. NissanÂ’s sales have plunged recently, and it sank into losses for the last fiscal quarter. The brand is widely considered to have been tarnished by the controversy around Ghosn.