2002 Nissan Frontier Xe Crew Cab Pickup 4-door 3.3l 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.

Nissan Leaf and the future of auto shows | Autoblog Podcast #525

Related: We obsessively covered the Frankfurt Motor Show — here's our complete coverage On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Associate Editor Joel Stocksdale. The pair discuss the long-awaited reveal of the second-generation Nissan Leaf as well as the Alfa Romeo Giulia and BMW M550i that recently passed through the office. They also preview the 2017 Frankfurt Motor Show and discuss the future and relevance of auto shows. The rundown is below. Remember, if you have a car-related question you'd like us to answer or you want buying advice of your very own, send a message or a voice memo to podcast@autoblog.com. (If you record audio of a question with your phone and get it to us, you could hear your very own voice on the podcast. Neat, right?) And if you have other questions or comments, please send those too. Autoblog Podcast #525The video meant to be presented here is no longer available. Sorry for the inconvenience.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 Topics and stories we mention Rundown Nissan Leaf reveal Frankfurt Motor Show preview What we're driving: Alfa Romeo Giulia and BMW M550i Unpopular opinion: the relevance of auto shows Spend my money Feedback Email – Podcast at Autoblog dot com Review the show on iTunes Image Credit: BMW, Nissan Green Podcasts Frankfurt Motor Show Alfa Romeo BMW Nissan Hatchback Electric Luxury Sedan alfa romeo giulia

2013 Nissan NV200 hauls itself into McCormick Place

Nissan has already announced that its NV200 will be New York City's Taxi of Tomorrow, but now small businesses can also take advantage of the compact commercial van when it goes on sale this April. Unveiled at the Chicago Auto Show, the Nissan NV200 bound for North America has been stretched by almost eight inches compared to the same van that has been on sale in other global markets since 2009. The 2013 Nissan NV200 will be built in Cuernavaca, Mexico and sold at select Nissan dealerships with a starting price of $19,990 (*excluding the $845 destination charge).
At that price, the NV200 costs thousands less than lead competitors like the Ford Transit Connect and the Ram C/V Tradesman, although it does deliver less cargo volume than both as well. Despite its longer body, the NV200's 122.7 cubic feet of volume comes in just under the 129.6 cu-ft for the Ford and well under the Ram's 155.5 cu-ft cargo capacity. The split rear doors and dual side sliding side doors will give plenty of access to the NV200's cargo area, however, and Nissan says the van is wide enough to accommodate a standard pallet.
The NV200 was designed as much to be a mobile office as it is a hauler, so Nissan made the cabin as such. The passenger seat back can fold down creating a flat space for a laptop, and the center console has been specifically designed for hanging file folders. The base NV200S includes power windows, a two-speaker AM/FM/CD audio system and a 12-volt power outlet, while the NV200 SV (starting at $20,980) adds features such as cruise control, six floor-mounted cargo tie downs, power mirrors and door locks and remote keyless entry. Options include the $950 Technology Package (available on SV only and adds navigation, backup camera and satellite radio), $250 for Bluetooth and $190 for glass added to the rear cargo doors.