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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.

2022 New York Auto Show Roundup | All the reveals, reviews, pictures

NEW YORK — In case you missed it, the New York Auto Show took place this year after being canceled in both 2020 and 2021 due to Covid. A lot of manufacturers showed up in force, but not everybody did. No matter, we were there, and we brought you news, photos and scoops from the floor throughout the show. All of our New York-related stories can be found at our central hub here, but if youÂ’d rather just get a small taste of everything in a quick and digestible format, keep scrolling. 2023 Kia Telluride and its new X-Pro trim Kia revealed the TellurideÂ’s first major refresh at New York, and it makes the three-row crossover a little bit more desirable without screwing up what we liked about it before. ThereÂ’s a new X-Line and X-Pro trim for someone who might want a little more off-road capability, and a number of tech improvements. Most notably, a newly-designed dash features new and bigger screens. 2023 Hyundai Palisade The TellurideÂ’s sister car from Hyundai was treated to a similar refresh. Like the Telluride, Hyundai gave the Palisade a slightly revised look, a new off-road trim (called XRT in the PalisadeÂ’s case), more tech inside and a new dash design with full-width air vents. If we had to choose, weÂ’re a little more impressed with the TellurideÂ’s refresh, as a number of us on staff actually prefer the pre-refresh Palisade styling over the new one. 2023 Jeep Wagoneer L and Grand Wagoneer L This one was inevitable. Jeep revealed the longer, roomier versions of its Wagoneer and Grand Wagoneer in New York, and theyÂ’re designated with an “L” at the end of their names. Total length grows by a foot, and the wheelbase goes up by 7 inches versus the standard Wagoneer models. Jeep has essentially allocated all this extra room to the cargo area, as it now offers a staggering 44.2 cubic-feet of space behind the third row. Besides the L, Jeep announced that its new Hurricane inline-six engine would find its first home in the Wagoneer. Efficiency gets a small boost, and power is more than sufficient at either 420 horsepower (standard output) or 510 horsepower (high-output version) from the twin-turbo I-6. Chrysler Airflow Graphite Concept The Stellantis party continues with Chrysler and its slightly revised Airflow. Re-styled for the New York market after initially debuting at CES in Las Vegas, the Airflow Concept gets new paint, changed accent colors, a slightly changed interior design and a new interpretation of the Chrysler logo.

Nissan gets new NA boss, lowered forecasts in management shakeup

José Muñoz, a Nissan and Infiniti sales and marketing vice president, will replace Colin Dodge as Nissan's new North America chief, come Jan. 1, as part of a wide-ranging management shuffle, Automotive News reports. Dodge will remain on Nissan's board, be assigned to special projects and report directly to CEO Carlos Ghosn.
Nissan is working on reorganizing its global operations into six regions, each with a new chief: North America (Muñoz' territory), Latin America, Japan-Southeast Asia, China, Europe and Africa-India-Middle East. Currently Nissan divides the globe into three regions, the Americas, Europe-Africa-India-Middle East and Asia-Pacific.
Nissan also lowered its sales forecast from 5.3-million vehicles to 5.2 million for the fiscal year ending on March 31, 2014. Last year, the company sold 4.914 million in the same period. In May, after Nissan's market share had fallen to 7.7 percent, Ghosn said he wants to double sales in the US by 2017 and increase its market share in the country to 10 percent.