2004 Infiniti I35 Base Sedan 4-door 3.5l 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.

Infiniti's Vision for Gran Turismo revealed in full [w/video]

Just about any car has to be designed with some sort of limitations, whether it's a production car that has to be usable on the road, a racecar that has to comply with regulations, or even a concept car that does, at the end of the day, actually need to be crafted out of real materials and wheeled onto a stage. But the Vision Gran Turismo series imposes no such limitations. Designed only for a virtual reality, the project allows for designers to craft a purely fantastical design whose limits fall barely short of their own imaginations. It presents companies with the opportunity to represent their brand as they want to, so it comes as little surprise that every automaker from here to Hong Kong has been lining up to take part. And the latest is Infiniti. Previewed in a pair of teaser renderings barely over a week ago, the Infiniti Concept Vision Gran Turismo is a suitably striking addition to the virtual world of the Gran Turismo video game franchise. Designed at the company's Beijing studio, the brief calls for a 4.5-liter naturally aspirated V8 hybrid powertrain, with a front mid-ship layout driving a rear transaxle for ideal 45/55 front-rear weight distribution. Beyond that it's all flowing forms, extreme aero and signature Infiniti design cues like a widened version of the brand's trademark grille shape and the kink in the rear pillar. It's got butterfly doors hinged ahead of those spindly mirrors, center-lock alloys crafted from carbon fiber, deeply sculpted aerodynamic elements, a large boomerang-shaped rear wing and aggressive long-hood/low greenhouse proportions. It's F1 meets GT, to hear Infiniti tell it, and whether you've got a PS3 and a copy of Gran Turismo 6 to play around with it or not, you can check it out in the images above and the video below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Introducing the INFINITI CONCEPT Vision Gran Turismo The "INFINITI CONCEPT Vision Gran Turismo" has been released on "Gran Turismo 6", available exclusively on PlayStation®3. Infiniti has continued to break new ground in design since the brand was first established. This is a sensuous GT car brimming with the Infiniti philosophy. How to receive it After Update 1.15 has been installed, the car can be purchased from the [Vision GT] area within the [CARS] section in "My Home" (here, you can also find the car's presentation movie).

Nissan recalls 226k vehicles over airbag inflators

Nissan and Infiniti are the latest automakers to issue recalls involving faulty airbag inflators from Takata. The Japanese automakers have announced campaigns covering about 226,326 units from seven models built in the early 2000s because they contain the bad part in the passenger-side, front airbag. The affected vehicles include the 2002-2004 Nissan Sentra, 2002-2003 Pathfinder and 2002-2003 Maxima, and it also covers the 2002-2003 Infiniti QX4, 2002-2003 I35, 2003 FX45 and 2003 FX35.
Like the other vehicles with the faulty inflators, it's possible for the part to rupture during airbag deployment and spray metal shrapnel at occupants. Nissan and Infiniti have even included vehicles with replacement airbags in this campaign because those parts also could have been defective. Both companies were also part of the earlier regional campaign to fix cars in high-humidity climates where the problem has been found to be the worst.
As is the usual response, Nissan and Infiniti will notify owners of the affected vehicles and will make the repair at no charge. According to the filing with the National Highway Traffic Safety Administration, these fixes will commence around August 11. Scroll down to read the report from NHTSA, or read the full defect notice as a PDF, here.