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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.

Hyundai plans to catch up with other automakers, offer EVs

YONGIN, South Korea (Reuters) - South Korea's Hyundai Motor Co is developing its first dedicated architecture for electric vehicles, seeking to catch up with the likes of Tesla in the growing segment with multiple, long-range models. While the platform will not be completed soon, Hyundai Motor and affiliate Kia plan to roll out small electric sport utility vehicles (SUVs) based on an existing underpinning next year, said Lee Ki-sang, who leads Hyundai-Kia's green cars operations. Hyundai will launch an electric SUV, followed by a sibling model by Kia Motors next year, Lee said, citing strong demand for SUVs. The subcompact or compact models would have a range of more than 300 km (186 miles) per charge, and would be "more competitive" than rival offerings, Lee said. And Hyundai said in a statement on Thursday that it plans to launch a new luxury electric vehicle under its Genesis marque in 2021, after introducing a plug-in hybrid version of an unidentified Genesis model in 2019. The separate platform represents a major push into the battery electric-car segment for a firm which has long trumpeted rival fuel-cell vehicles, reflecting strong investor pressure to compete more vigorously in a market that has been stimulated by U.S.-based Tesla's longer-range models. And tough fuel-economy and emissions regulations in the United States, Europe and China are compelling automakers to push fuel-efficient cars even though low oil prices have undercut demand. Hyundai's electric-car platform would allow the automaker to install a battery pack in vehicle floors to accommodate more battery capacity and maximize cabin space, Lee said. "The electric-vehicle platform will require high up-front investments, but we are doing this to prepare for the future," he said at Hyundai-Kia's green car research center in the city of Yongin, outside Seoul. He did not reveal the cost. Lee, a senior vice-president at Hyundai Motor, was speaking during an interview on the eve of an auto show that kicked off in Seoul on Thursday. Analysts said Hyundai had no choice but to build separate electric-vehicle platforms to be relevant in the segment. "The separate platform may incur losses initially, but Hyundai will be left behind the market if they don't offer long-distance models, like 300 km, 500 km and 600 km," said Ko Tae-bong, an analyst at Hi Investment & Securities.

Facelifted Hyundai ix35/Tucson shows up

It looks as though Hyundai has readied a facelifted version of its ix35 crossover (known as the Tucson here in the U-S-of-A) for the Geneva Motor Show next week. While we haven't been able to get the Korean automaker to cough up the official details - or more than one image - reports indicate that the new Euro CUV will get revisions to the engine lineup, technology offerings and more.
The Hyundai's sheetmetal has been nipped and tucked from the looks of the photo, with bolder, bi-xenon headlamps and LED running lights the most obvious alterations. Inside we're told to keep an eye out for improved materials and a new, larger TFT infortainment control screen.
Expect clearer intel about both the ix35 and the home-market Tucson no later than next week, and most likely a bit earlier.