2006 Nissan Frontier Nismo Off-road Crew Cab Pickup 4-door 4.0l 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 Titan Pro-4X, Hyundai Kona and Mitsubishi Outlander PHEV | Autoblog Podcast #621

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Consumer Editor Jeremy Korzeniewski and Senior Editor, Green, John Beltz Snyder. They talk about cars they've driven recently, including the 2020 Nissan Titan Pro-4X, Hyundai Kona and Mitsubishi Outlander PHEV. Then they talk news, starting with Volvo's new pick-up and drop-off service. Then they talk about Q1 U.S. sales figures. Lastly, they discuss the possibility of new styles of motorcycle from Harley-Davidson, including a flat-track bike and a cafe racer. Autoblog Podcast #621 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 Cars we're driving 2020 Nissan Titian Pro-4X 2020 Hyundai Kona Ultimate AWD 2020 Mitsubishi Outlander PHEV Volvo Valet U.S. car sales plummet Harley-Davidson cafe racer and flat track motorcycles Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Infiniti ESQ is a Chinese Nissan Juke Nismo

Take a Nissan Juke Nismo, replace all of its suede and Alcantara interior with leather and cross-stitching, replace all of its badging with the words "Infiniti ESQ," and boom! You've got a made-for-China crossover aimed at "the new millennials." Infiniti teased the coming of the ESQ last month, and today, we're treated to pictures taking it in from various toothsome angles.
Whippersnappers with anywhere from 200,000 yuan ($33,507 USD) to 300,000 yuan to spend will get the same 197 horsepower, 1.6-liter turbocharged four-cylinder, sport-tuned CVT and all-wheel drive that we know in the Juke Nismo. We haven't tracked down any other official information about it yet, but potential buyers will get their first look at it during the Chengdu Motor Show that opens later this month, where it will share market-specific notes with Infiniti Q50 L.