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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.

Ford tops GM in US vehicle sales in May, driven by fleets

DETROIT - Ford, bolstered by heavy sales to fleet customers, surpassed General Motors in US new vehicle sales in May, according to figures reported Thursday. Ford said May sales rose 2.2 percent from a year ago to 241,126 units. GM sales dropped 1.3 percent to 237,364. GM said it had been trimming sales of heavily discounted vehicles to car rental companies. Such fleet sales made up about 19 percent of its total sales in May. Ford's fleet sales rose 8.4 percent, representing more than 34 percent of total sales. The industry average is around 20 percent. Analysts had expected mixed results for the industry, with sales likely propped up by heavy discounts. Fiat Chrysler Automobiles said May sales dipped 0.9 percent to 193,040. Toyota's US sales dropped 0.5 percent to 218,248. Nissan said US sales in May rose 3.0 percent, to 137,471. After demand fell in March and April, analysts estimated May sales at just over 1.5 million. The seasonally adjusted annual rate of sales in May was estimated at 16.8 million to 16.9 million vehicles, about the same as April. A year earlier, sales stood at 17.55 million vehicles. Early reports indicated that sales over the three-day Memorial Day weekend were helped by heavy discounts. "While demand for new vehicles is still relatively strong, it's a bit of smoke and mirrors," said Jessica Caldwell, executive director of industry analysis at Edmunds, the car shopping website. Manufacturers and dealers "really pushed the deals over the holiday weekend to prop up their May numbers," she said. "Incentives were up sharply, and it seems automakers are putting more cash on the hood to nudge car shoppers to buy versus lease." General Motors dealers were offering discounts of up to $12,000 on the full-size Chevrolet Silverado pickup, while some dealer discounts on Ford Motor Co's F-series pickups were more than $10,000 on 2017 models and more than $14,000 on leftover 2016 models. The 2017 model year started eight months ago. Reporting by Paul LienertRelated Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Earnings/Financials Chrysler Fiat Ford GM Nissan Toyota US

2014 Nissan Versa Note priced from $13,990*

With the 2014 Nissan Versa Note going on sale this month, Nissan has announced the official pricing for its redesigned subcompact hatchback. Commanding a $2,000 premium over the Versa sedan, the new Versa Note will have a starting price of $13,990 (*not including $790 for destination), which is $680 less than the 2012 Versa Hatchback.
The base model is the Versa Note S, but trim levels also include S Plus and SV starting at $15,240 and $15,990, respectively. The S Plus trim will deliver the highest fuel economy - best in class according to Nissan - for the Versa Note thanks to a CVT and active grille shutters, and the SV brings more convenience features like power windows and door locks (that's right, the base models will still get crank windows and manual door locks). Stepping up even further, the SL Package will add push-button starter, backup camera and heated seats for $17,690 while the SL Tech Package tops out at $18,490 with navigation, Nissan's Around View Monitor and Bluetooth. More pricing details for the 2014 Versa Note are posted below in the official press release.