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2015 Hyundai Sonata found uncovered in Korea

Hyundai is locked and loaded to debut its redesigned, 2015 Sonata at the New York Auto Show next month. For one enterprising Korean photographer, however, the reveal just couldn't come soon enough.
A South Korean website called Bobaedream.co.kr unceremoniously published some images of what would appear to be a completely undisguised example of the new Sonata. Korean Car Blog quickly followed up on the leak, claiming that the car in question was fitted with Hyundai's 2.0-liter turbocharged GDI engine, making 274 horsepower, and connected to an all-new, seven-speed dual-clutch transmission.
Whether that information came from a reliable insider source (as the photos would suggest) or was just a best guess, we can't say. But we can see what direction Hyundai is headed in with the Sonata. The front end seen in the spy shots is more or less what we'd already seen in the last teaser picture, with a new headlamp design helping to set off a prominent grille. The grille does seem to have some element of the strong, graphical surround from the teaser, too, though it's not as defined in these low-resolution pictures. Sheetmetal on the hood and bodysides seems cleaner, straighter and less fussy than in the current car, too. As for whether or not this is the Korean-spec car or the one destined for the US market, that's unclear, though we have been told that the two cars do look very similar.

Hyundai spotted testing Prius-style hybrid

The Toyota Prius has become an automotive icon – maybe less so among actual automotive enthusiasts than with the public at large – to the extent that most anyone on the street would recognize its five-door hatchback form and immediately identify it as a hybrid. Little wonder that Honda tried to emulate it with the second-gen Insight, but while that didn't work out so well for Honda, it looks like Hyundai is preparing to go down the same road with a dedicated hybrid of its own. Our paparazzi on the ground in the Arctic Circle have spotted this protoytpe and tell us what we're looking at is a new Prius-fighter from the Korean automaker. Snapped up high on a transporter truck, you can see the orange high-voltage cables underneath and a label with the letters AE HEV – the latter standing, of course, for Hybrid Electric Vehicle. We wouldn't be surprised if the AE stood for Advanced Experimental or Alternative Energy or something of the sort. Tipped to be based on the same platform as the next-generation Elantra, the new Hyundai hybrid is said to pack a 1.6-liter inline-four working in parallel with an electric motor juiced by a lithium-ion battery pack. It's expected to begin production in the second half of 2016, with a plug-in and possibly other variants to follow a year to a year and a half after its initial launch.

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.