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48-MPG Nissan X-Trail Hybrid comes to Japan

Next month, Nissan will start selling a hybrid version of its X-Trail compact crossover in Japan. While the Japanese automaker is touting all the bells and whistles like "Intelligent Parking Assist," the model really makes its mark in fuel economy figures. The marquee number is 20.6 kilometers per liter, or about 48 miles per gallon. This is using the more lenient Japanese driving cycle, but it's still something to be proud of. The model also delivers more torque than that typically generated by a 2.5-liter engine while cutting nitrogen oxide emissions by 75 percent relative to the standard gas-powered version. In fact, the X-Trail Hybrid will generate tax exemptions because of its high fuel economy. The model's price in Japan will range from about $23,300 for the base two-wheel-drive version to about $27,000 for the top-of-the-line all-wheel-drive version. The Nissan X-Trail Hybrid goes on sale in Japan May 13. We'd first reported on the X-Trail when it was unveiled at the Frankfurt Motor Show in September 2013, noting at the time that the car's styling was identical to that of the Nissan Rogue. Take a look at Nissan's press release for the X-Trail is available below. Nissan Releases New X-TRAIL HYBRID YOKOHAMA, Japan (April 7, 2015) - Nissan Motor Co., Ltd. today announced the launch of the new Nissan X-Trail Hybrid, which goes on sale on May 13, 2015 at Nissan dealers throughout Japan. The current generation X-Trail has garnered good reviews from customers for its excellent driving performance, realized by features such as its ALL MODE 4X4-i system and advanced chassis control technologies that have been adopted as world-firsts – as well as a variety of safety features such as Emergency Brake and Around View Monitor with Intelligent Parking Assist. Equipped with the 2.0-liter MR20DD hybrid engine that enables both driving and environmental performance, the new X-Trail Hybrid delivers a comfortable driving experience with its powerful acceleration and remarkable quietness, which eclipse those of typical 2.5-liter gasoline engines. In addition, all the grades achieve tax exemptions. In addition, the new X-Trail Hybrid will have Forward Emergency Braking as standard equipment, expanding its safety technology features. Nissan is planning to introduce Forward Emergency Braking as standard on major models in Japan, by the end of autumn 2015.

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.

St. Louis man charged in killing of Illinois college student

A St. Louis man has been arrested and charged with murder in the slaying of a 19-year-old Illinois college student who went missing while trying to sell his sports car on Craigslist, authorities said. Capt. Tim Fagan of the Florissant, Missouri, police department said at a news conference Wednesday night that 24-year-old Michael Gordon was taken into custody Tuesday and was being held at the St. Louis County jail in lieu of $1 million bond. Gordon has been charged with first-degree murder and armed criminal action in the death of Taylor Clark, a sophomore engineering student at Southern Illinois University-Edwardsville. Fagan, the deputy commander of the Major Case Squad of Greater St. Louis and lead investigator in the case, said police arrested Gordon after his name was found in emails Gordon traded with Clark about the car Clark was trying to sell. Investigators said the two did not know one another before they met. Police say Gordon is an employee of a truck driver training center in the St. Louis suburb of Hazelwood, Missouri, not far from where Clark's 2007 Nissan 350ZX and body were found Tuesday. It was not immediately clear whether Gordon has an attorney. Clark, who is from the southwestern Illinois town of St. Jacob, was reported missing by family members on Monday. Authorities say he was last seen by his girlfriend. "Our hearts and minds are with Taylor Clark's family and friends as they cope with this tragic loss," SIU-E Chancellor Julie Furst-Bowe said in a statement issued Wednesday. "At a time of the year when the new spring season brings the promise of brighter days ahead, and commencement provides unending potential for so many of our students, it is truly sad that Taylor had his bright future taken away." The Belleville (Illinois) News-Democrat reported that Clark worked at a convenience store in Troy, where a candlelight vigil was scheduled for Wednesday night. A similar vigil was held Tuesday night on campus. Clark's death comes during the same week as a Monday court hearing in St. Charles County in which a 23-year-old man was sentenced to life in prison for fatally stabbing a 45-year-old St. Louis man during an encounter and planned robbery in 2012 that was set up through a Craigslist ad. On the same day of the hearing, Fairview Heights, Illinois, police unveiled a "safe exchange zone" on its parking lot, complete with security cameras, to help citizens safely broker online transactions with strangers.