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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 announces 5-year/100,000-mile bumper-to-bumper warranty for commercial vehicles

Nissan is a relative new-kid when it comes to the commercial van market in the US, with its commercial vehicles division only introducing the first NV vans in February 2011. But Nissan isn't letting its newcomer status keep it from challenging the established players in the segment. The company's latest shot over competitors' bows is announcing that, starting for the 2014 model year, its NV Cargo, NV Passenger and NV200 Compact Cargo vans carry a best-in-class, five-year/100,000-mile bumper-to-bumper warranty. Their powertrain coverage also gets a 40,000-mile increase to five years/100,000 miles.
The new warranty is a huge leap over adversaries in the segment and should lure in some buyers looking for a longer term of coverage. The Mercedes-Benz Sprinter, Ram ProMaster, Ford Transit and Transit Connect all carry a three-year/36,000-mile bumper-to-bumper warranty. The Fords offer five years and 60,000 miles of powertrain coverage, while all of the others increase that to 100,000 miles. Until this announcement, Nissan had the standard thee years of coverage, as well.
The Japanese automaker is clearly hungry to grab a bigger piece of the commercial van pie. Its heavy-duty NV vans have a relatively small 5.3 percent market share in their segment as of May 2014, according to the company's figures, but the NV200 is doing better with a 19.4 percent share. The division as a whole is on the upswing, though, with sales up 88 percent so far in 2014. With just a few years under its belt, Nissan Commercial Vehicles seems unafraid to challenge the status quo in the segment. Let's see how buyers respond. Scroll down to read the full announcement about the new warranty.

Ford and Lincoln design honcho leaves to head Nissan North America design

Last Friday, David Woodhouse suddenly resigned from his dual positions as Ford's director of global strategic design and director of Lincoln design. In a post not long after leaving, he praised the efforts of his former team over the past six years he headed design at Lincoln. Among other products, that crew gave us the redesigned Navigator, the Continental concept and production sedan, and the Aviator concept and production crossover. Car Design News reports Woodhouse traded Michigan for California, taking the role of VP at Nissan Design America in San Diego. He officially assumes the position July 1, and will also serve on the Japanese automaker's Global Nissan Design Management Committee. Woodhouse has spent more than 25 years in the design department, starting with BMW and work on the Mini and Range Rover brands, followed by a brief stint with Cadillac of Europe. For the past 20 years he's been with Ford, coming on board with the Ford's former luxury arm known as the Premier Automotive Group — Jaguar, Land Rover, Aston Martin, Volvo and Lincoln. He became Lincoln's design director in 2013, introducing the world to the design language labeled "quiet flight." He described the language's details as "anti-wedge body gestures, S-curves wherever possible, and an emphasis on horizontal lines at every opportunity to create leaner, longer, wider emphasis on the exteriors, and create equilibrium, balance, and calmness on the interiors." A much shorter way to describe it is: revitalized Lincolns. The U.S. luxury maker's new and overhauled products have been praised for their lines by critics and by paying customers. The brand's done so well it's hard to remember when the MKC concept was a revelation, and that goes on Woodhouse's resume, too. That's some special juju to take to Nissan, where Woodhouse will lead both Nissan and Infiniti design focused on the North American region. Nissan has a solid if uninspiring lineup that sells well here, while Infiniti, as the luxury brand, is the bigger issue. Infiniti sedans glide on the contrails of a design language more than 10 years old. The money-making crossovers and SUVs haven't made a splash in about the same time, since the long-ago FX45. Nissan's plan to update 70 percent of its lineup over the next few years and Infiniti's transition to an all-electric brand makes right now the perfect time to break into riveting designs for the street. Woodhouse replaces Taro Ueda, who moves into a global role with Nissan.