2003 Nissan Murano Sl Sport Utility 4-door 3.5l on 2040-cars

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Renault-Nissan debuts new Common Module Family for future vehicles

Platform sharing is nothing new for the 14-year-old Renault-Nissan Alliance, but this partnership is set to introduce new modular platform components that will eventually underpin 11 Renault models and three Nissan vehicles by 2020. Rather than being a typical platform, the Common Module Family (CMF) actually represents five segments of a platform that can be used in various applications, and one of the first vehicles to use this architecture will be the 2014 Nissan Rogue (spy shots of which are shown below) when it arrives "in late 2013."
As pictured in the image above (click to expand), CMF is composed of four chassis component, principally the front underbody, rear underbody, engine bay and cockpit as well as a common electrical system. Besides the next-gen Rogue, future Nissan models to share CMF will include the Qashqai and X-Trail, while Renault models will start using the platform next year on vehicles including the Scénic and Laguna. The CMF architecture is expected to help the Alliance reduce the parts cost of a vehicle by up to 30 percent and reduce the entry cost by up to 40 percent. The official press release with more details about CMF, and what it means for Renault-Nissan, is posted below.

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.

Dongfeng-Nissan surprises with Viwa Concept EV for Venucia

Nissan has a joint venture in China with Dongfeng to make passenger vehicles, and last year the two companies created a sub-brand called Venucia that aims to roll out five cars by 2015. With the gasoline-engined D50 and R50 and a pilot program for the E30 electric car already out, this little orange beast, the Viwa EV concept, could point the way to a future offering.
Looking like a Chevrolet Spark that spent the weekend raving in Ibiza, the Venucia Viwa EV aims to be reliable, practical, efficient and accessible all in one package. Beyond the practical bit, defined as, "packaged with a compact body for easy driving," Venucia hasn't said how any of those other qualities are achieved. In fact, it hasn't even divulged the specifics of the electric powerplant. However, it does say that it will be developing more EVs under the guide of "China's new energy vehicle policy."
You can get a little more info about it in the press release below, or discover the little peach in the high-res gallery above.