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Nissan previews new Sport Sedan Concept ahead of Detroit debut

When the Cobo Center opens its doors in a couple of weeks for the Detroit Auto Show, there'll be plenty of new metal on display - and this is the latest.
Nissan announced today that it will bring a new Sport Sedan Concept to the Detroit show, releasing the short statement below accompanied by the teaser image above. Expected to hint at the next Maxima, the concept "previews a new energetic design direction that amplifies Nissan's legendary approach of applying sports car principles to a sedan."
That's about all Nissan is saying for now, so we'll have to wait a while longer to find out more. But the concept will be joined on the show floor by the IDx Freeflow and IDx Nismo concepts that'll be showcased for the first time in North American after their debut at the Tokyo Motor Show over a month ago.

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.

November U.S. new car sales mixed as automakers deepen discounts

DETROIT — Major automakers posted mixed U.S. November new vehicle sales on Friday and predicted a competitive December as they rushed to sell vehicles and boost their numbers before 2017 ends. Automakers are trying to sell down 2017 model-year vehicles, offering high discounts to consumers as the year-end nears. In 2016, the industry reported record annual sales of 17.55 million units. According to consultancies J.D. Power and LMC, discounts have been above 10 percent of the average transaction price for 16 of the past 17 months, a level experts say is unhealthy and unsustainable. The November sales results come as the National Automobile Dealers Association said on Friday it expects new vehicle sales to decline to 16.7 million units in 2018, after dropping to 17.1 million for the full year in 2017. If that forecast comes true, the race to move new vehicles off dealers' lots will only intensify next year. Brandon Mason, a director at PwC's automotive practice, said a worrying trend for the industry was a rising number of subprime loans. He said subprime levels are at just over 20 percent of originations, against more than 30 percent prior to the Great Recession, but recent increases remain a concern. "That's a bit of a red flag," Mason said. "It's something to keep an eye on as we move into 2018." November results by automaker: General Motors: Sales fell 2.9 percent, with sales to consumers flat against the same month in 2016. Much of the decrease was driven by lower fleet sales. GM said strong SUV and crossover sales pushed its average transaction price for the month above $37,000 for the first time. The level of unsold cars, which has been a concern for analysts and the industry, rose slightly to 83 days' supply, from 80 days at the end of October. "More vehicles are sold in December than any other month, and we are very well positioned because we have momentum in so many segments, but especially in crossovers," said Kurt McNeil, U.S. vice president of sales operations. Fiat Chrysler Automobiles: Fleet sales are low-margin, and FCA in particular has targeted a significant reduction in this type of sale in 2017. It posted a 4 percent overall decrease in sales for November, but fleet sales were down 25 percent while sales to consumers were up 2 percent on the year. Ford: The No. 2 U.S. automaker reported a 6.7 percent increase for the month, with fleet sales up nearly 26 percent and retail sales 1.3 percent higher than in November 2016.