2004 Nissan Quest 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.

Nissan Leaf sales up again in February, Chevy Volt dips deeper

Nissan managed to buck the industry's overall trend of lower sales in February with double-digit growth throughout its lineup. That includes a 12th month of record sales for the Nissan Leaf electric vehicle, with the year-over-year numbers up more than a skosh. The February ledger for the Chevy Volt looked much worse, falling 25.6 percent from February 2013 down to 1,210 units. With 1,425 Leafs sold, Nissan came away the winner in a head-to-head competition between these the two early plug-in vehicles for the fourth month in a row. Nissan expects the Leaf's sales momentum continue in March. February Leaf sales were up 118.2 percent, making 2014 the car's best February ever. The car was most popular in San Francisco, CA and Atlanta, GA, two places where the the brutal winter cold that struck most of the country had a limited effect. Nissan said that other markets with notable Leaf sales growth were Honolulu, HI, Dallas/Ft. Worth, TX and Denver, CO. Toby Perry, Nissan's director of EV sales and marketing, said in a statement that Nissan, "amped up advertising in the latter half of February, which already has resulted in an uptick in sales and a significant increase in shopping traffic. We expect to see that momentum continue in March." The Volt retains an overall sales lead against the Leaf, but Chevy's calendar year-to-date sales numbers are down 23.1 percent so far in 2014. Overall, Chevy's sales calendar YTD numbers were down just 7.7 percent, so the Volt is performing below average. As always, we will have a more complete report of last month's green car sales up in short order. Green GM Nissan Electric Hybrid PHEV ev sales

Nissan Rogue Detour uses Google Maps to go create virtual test drive from your doorstep

The best way to evaluate a new car before you buy it is to test drive it. All of the specs and reviews in the world cannot communicate how a car suits you as well as a few minutes behind the wheel. Interesting, then, that according to Nissan, the average buyer spends twice as much time researching new cars online than they do at dealers.
To market its new 2014 Rogue, Nissan has launched an online marketing experience aimed at bridging that gap. Called The Detour, it combines Google Street View and Google Maps to give you a custom-tailored virtual test drive. The neat, uniquely interactive part about Detour is that it allows you to specify a starting and ending location. Thus, you can use the microsite to 'show' the Rogue on your commute, or your favorite stretch of tarmac. To spice things up, Nissan has added some digital effects and set the experience to a song by British rapper M.I.A.
Detour seems to work better on shorter journeys, because it snips out some portions of the route in order to keep the experience from running too long. If you're going to try it out, we suggest using a crosstown journey rather than going cross country. Scroll down to get all of the details on the Rogue's latest marketing campaign, or click here to try it out for yourself.