2013 Infiniti Jx35 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.

Infiniti JX35 QX60 Hybrid confirmed for New York debut

The next Q-ified Infiniti will be making its debut at the New York Auto Show later this month, the QX60 - the crossover formerly known as JX35. And while there aren't many changes to the crossover in terms of design or function, the big news is that Infiniti will be revealing a production hybrid powertrain option for its seven-passenger luxury/utility vehicle.
The QX60 Hybrid uses the same powetrain found in Infiniti's M35h gasoline-electric sedan, which couples a 2.5-liter supercharged four-cylinder engine with a 15-kilowatt electric motor, running to the wheels via continuously variable transmission. Both front- and all-wheel-drive versions of the QX60 Hybrid will be available, and Infiniti says that the more efficient CUV should be good for around 26 miles per gallon combined - an improvement of five mpg over the current JX35 with its 3.5-liter naturally aspirated V6. And because the compact lithium-ion battery will be housed underneath the third row seat, we're told that the hybrid model will still have the same passenger and cargo capacity of the non-hybrid crossover.
This will be the first three-row hybrid CUV offered in the US market, and wrapping it up in a luxury package makes a lot of sense to us, since it could be a good way of cajoling customers into absorbing the extra cost of the more expensive powertrain. (Keyword in that sentence: CUV. After all, the Cadillac Escalade is still currently available as a two-mode hybrid for the 2013 model year.) Infiniti has not released official pricing figures, but says that the hybrid model will represent a roughly $3,000 premium over the standard QX60.

Infiniti to launch first electric car, to be made in China

BEIJING — The first electric car for Nissan's premium brand Infiniti will be a sporty sedan produced in China, the Japanese carmaker said in a statement viewed by Reuters ahead of a public announcement expected as soon as Wednesday. The vehicle would hit the market in around three years, and consumers would get a taste when the company unveils a concept car, dubbed the Qs Inspiration electric sedan, at the Shanghai auto show later this week, Nissan officials said. "China has the most growth potential for electric vehicles globally, especially in the premium segment," Infiniti Chairman Christian Meunier said in the statement seen by Reuters. Automakers operating in China have to sell more so-called new-energy vehicles, either battery electric cars or plug-in electric hybrids, to comply with official production quotas designed to reduce smog. It was not immediately clear whether Infiniti planned to produce its first electric vehicle in other markets. An Infiniti spokesman said, however, the brand did not intend to export the e-sedan from China. The planned e-sedan is part of Infiniti's longer-term strategy to significantly electrify its product lineup. Brand officials have said that from 2021 every Infiniti model launched will be either an all-electric car or so-called "e-Power" hybrids, underlining Nissan's previously announced plan to make Infiniti primarily an electrified offering. The sedan likely would be built on a new flexible architecture developed specifically to accommodate electrified powertrains, Infiniti said in the statement. Its design, especially the interior, would be significantly different than current models, design chief Karim Habib said. EVs do not have bulky gasoline engines and transmissions, opening up space inside the car. "It will have a flat floor, and if you are a passenger you can cross your legs or stretch out your legs," Habib told Reuters. Competition in China's rapidly emerging electric car market is heating up amid an onslaught of models from startups such as Nio and WM Motor, as well as those from established automakers. In the luxury segment, Infiniti will be competing with Tesla Model S and Model X, as well as other models due to be launched in coming months by Audi, Mercedes-Benz, BMW and Lexus.