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Hyundai CVVD engine brings another dimension to valve timing

A new technology from Hyundai Motor Group places another marker on the march to more efficient internal combustion engines. Called Continuously Variable Valve Duration, the innovation permits two options for how long the intake valves remain open during the combustion cycle. The feature adds a third take on valve chicanery, atop variable valve timing that changes when valves open, and variable valve lift that changes how far valves open. Hyundai says the feature returns a 4% improvement in performance, a 5% increase in fuel economy, and lowers emissions by 12%. Hyundai applied for two patents on the valvetrain process in South Korea in 2011 and again in 2015. The altered valve duration in this latest iteration is made possible by two movable arms inside the camshaft. Each arm is anchored at its base to a pin at the center of the camshaft, while the end of each arm extends toward the edge of the camshaft. Changing the position of the pin in the center of the camshaft changes the angle of the arms relative to one another, which moves the camshaft along its mounting rod. Voila, a new intake cam profile that either lengthens or shortens valve overlap.   During low-speed spells at low load, CVVD opens the intake valve from the middle to the end of compression stroke. The weaker detonation isn't a factor at low load, and the reduced friction during compression improves fuel economy. During heavy engine loads, the intake valve closes at the beginning of the compression stroke to maximize the amount of air mixed for detonation, boosting torque. Four additional features enhance the benefits of CVVD. A more powerful direct injection system increases fuel spray pressure from 250 bar to 350 bar. Hyundai doesn't go into details on its Integrated Thermal Management System, but says the ITMS "quickly heats or cools the engine to the optimal temperature." Low-friction components lower overall engine friction by 34 percent. And a low-pressure exhaust gas recirculation layout diverts low-pressure exhaust gas from the traditional EGR route to the turbocharger compressor under high load for better fuel efficiency.   The first engine to boast the new tech is the Smartstream G1.6 T-GDi four-cylinder, which produces 180 horsepower and 195 pound-feet of torque. It will appear in the 2020 Hyundai Sonata Turbo going on sale in South Korea later this year.

2019 Kia K900: Here's the redesigned interior in sketch form

A little while ago, we posted teaser sketches of the new Kia K900 flagship. So far, we've learned how it looks from front to side to rear, but the interior has remained a mystery. Today, Kia released this sketch of the dashboard, which seems to be as restrainedly designed as the exterior. The general shape of the dashboard seems to mirror recent BMW offerings, as it's not pronouncedly driver-centric. There's a nearly full-width strip of light wood that extends to the doors, and the steering wheel has also received its share of the wood treatment as well as the gearshift surround, with a large infotainment jog dial next to the shifter. We also see a virtual gauge cluster, which is complemented by a wide central screen that Kia says is 12.3 inches. The HMI screen has gesture controls, but the interior's trick appears to be what Kia calls an "intelligent lighting system," which includes chromotherapy ambient mood lighting to deepen the sense of being cocooned inside the leather interior. There are several calming interior lighting modes to suit the occasion — maybe it's a way to combat frustration in traffic. Again, if the Stinger's exterior is knowingly busy and its interior is designed to invoke the feel of a GT car, the K900's cabin has traditional "executive sedan" woven into the mix, just like its exterior design. Kia has said the K900 will be out in the second quarter of 2018, so we might just see a reveal in a couple of weeks at the New York Auto Show. Related Video:

Which of these five plug-ins should win the 2017 Green Car of the Year?

It's going to be a competitive race for the 2017 Green Car Of The Year. With a minivan in the running for the first time in ages, the five finalists announced by Green Car Journal today include five very different plug-in vehicles. As Ron Cogan, the editor and publisher of Green Car Journal, said in a statement, "electrification is now considered by most automakers an essential technology for current and future high-efficiency models." Let's check out the list: Toyota Prius Prime, the updated plug-in version of the world's best-selling hybrid. Chevy Bolt, GM's all-new entry into the long-range EV game. Chrysler Pacifica, a family hauler with the ability to go 30 miles on electric power. Kia Optima. The nomination is for the full line-up, but really the hybrid and plug-in hybrid models are the green stars here. BMW 330e iPerformance, one of the automaker's many new plug-in hybrids that bring battery power to models outside the i sub-brand. Green Car Journal will announce the winners at the Los Angeles Auto Show on November 17th, along with some, "other green transportation announcements," whatever that means. Last year, the winner was the 2016 Chevy Volt, the first model to snatch up two wins. Which do you think should win this year? Related Video: News Source: Green Car JournalImage Credit: REUTERS/Kevork Djansezian Green LA Auto Show BMW Chevrolet Chrysler Kia Toyota Chevy Bolt chrysler pacifica green car of the year toyota prius prime bmw 330e