Excellent Condition, Silver, Cust Rims, Cust Stereo Sys 1,800, Awesome Commuter on 2040-cars

Auto blog

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.

Spitballs flying between Nissan and Fiat

At the 2012 LA Auto Show, Fiat brand chief and recently crowned marketing genius, Olivier François, attempted to distance the Fiat 500e from other electric vehicles, asking rhetorically, "Isn't ugliness the worst kind of pollution?" Nissan has apparently taken issue with these comments, feeling slighted for what it considers digs at the Leaf's styling. In a recent interview with Automotive News, Nissan's marketing chief Simon Sproule shot back, "Let's face it, Fiat has not shied away from controversial styling themselves," he continued, "many would describe many of their products as visual pollution." Ouch.
Sproule says that while the 500e is a "me-too" product, made only to appease US emissions regulations, the Leaf is a serious effort at producing an EV. The Nissan marketing boss points out that the Japanese automaker has invested billions in EV development and production facilities, while Fiat will lose $10,000 on every 500e sold.
However sales of the Leaf in the US are down five percent. Nissan sold just 8,330 Leaf's so far this year, but Sproule contends that it has less to do with styling, and more with the charging infrastructure. Sproule also thinks that Nissan hit a balance between styling and practicality with the Leaf: "It's still very recognizable as a five-seat hatchback, fully functioning, absolutely competitive with the packaging of the Golf of any other mainstream vehicle." For a segment where efficiency is king, isn't that what matters most?

Ferrari SUV and Aston Martin in Formula E? | Autoblog Podcast #529

This week, Editor-in-Chief Greg Migliore is joined by Green Editor John Beltz Snyder. They discuss Ferrari's SUV plans as well as Aston Martin's Formula E consideration. They also talk about cars we've driven including the Chevy Colorado ZR2, a Nissan Rogue ProPilot prototype and a Ford Shelby GT350. This week's podcast also features a car you don't need a license to drive. Autoblog Podcast #529 Your browser does not support the audio element. Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Ferrari SUV FCA keeping Jeep Aston Martin mulls Formula E Cars in the office: Ford Shelby GT350, Chevrolet Colorado ZR2, Nissan Rogue with ProPilot Assist The List: Drive a car that requires no license 3 Big Questions: Ferrari SUV or Lamborghini SUV? Chevy Colorado ZR2 or Toyota Tacoma TRD Pro? Ford Shelby GT350 with or without Performance Package? Spend my money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Green Podcasts Aston Martin Chevrolet Ferrari Ford Jeep Lamborghini Nissan SUV Electric Performance Videos Formula E shelby nissan propilot