1996 Infiniti Q45 Base Sedan 4-door 4.5l 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.

2014 Infiniti Q50 sees 3,650 pre-sales ahead of Aug. 5 debut

Infiniti's answer to the hot new sports sedans from BMW, Cadillac and Lexus is creeping closer and closer to its August 5 arrival in dealerships. And while we yet can't pass judgment on the Infiniti Q50 - formerly known as G37 - 3,650 Americans are apparently ready to, as they've already raised their hands for the 2014 model.
In a pre-sale program announced at the 2013 New York International Auto Show, Infiniti gave buyers until June 30 to raise their hand for the new model. "The Infiniti Q50 pre-sale exceeded all expectations, becoming the most successful such program in Infiniti history," according to Infiniti's American Vice President Ben Poore.
A lot is expected of the Q50, available in both rear- and all-wheel-drive and with an optional hybrid powertrain. With 328 horsepower from its 3.7-liter V6 engine, Infiniti is making sure the new car packs a big punch relative to the competition. Meanwhile, the Q50 Hybrid offers fuel-sippers 360 ponies and up to 36 miles per gallon.

Nissan bringing Infiniti brand to Japanese market

Ever hear that the best stuff is saved for export? Just ask Japanese luxury car buyers. It's been decades since Japan's largest automakers set out to take on Europe's finest with dedicated luxury brands of their own, but they have kept those brands largely out of their own domestic market and sold them almost exclusively overseas. But that's beginning to change.
In 2005 Toyota launched the Lexus brand - which it had been exporting since 1989 - in Japan. Honda reportedly planned on bringing its Acura brand to its home market just a few years later, but ended up delaying the move. Now Nissan is reportedly preparing to launch the Infiniti lineup in its own backyard.
This according to a report published in the Japanese business daily Nikkei and now making the rounds of the English-language press. The plan apparently involves offering at least part of the Infiniti model line in domestic Nissan dealers, holding off for the time being on launching a separate dealer network in Japan.