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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.

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.

Driving Civic and Elantra Hybrids, and big Ford Maverick updates | Autoblog Podcast #842

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Road Test Editor Zac Palmer. They discuss the week in car news first, leading off with the updated 2025 Ford Maverick that adds a Lobo sport truck variant and an AWD hybrid. Next, they chat some Cadillac news with the reveal of the stunning Sollei convertible concept and the refreshed 2025 Escalade. After the news, the two focus on what they've been driving over the past couple of weeks. They start with the Fiat 500e, then move along to a comparison between the refreshed Hyundai Elantra Hybrid and totally-new Honda Civic Hybrid. Lastly, there's a discussion of the new Infiniti QX80 and the STI mods applied to our long-term Subaru WRX. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #842 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown News 2025 Ford Maverick Lobo 2025 Ford Maverick adds AWD hybrid version Cadillac Sollei revealed 2025 Cadillac Escalade refresh What we're driving 2024 Fiat 500e 2025 Honda Civic Hybrid 2024 Hyundai Elantra Hybrid 2025 Infiniti QX80 Long-Term 2023 Subaru WRX Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related Video:  Cadillac Sollei is an electric convertible concept This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.