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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.

Kia developing 800-volt charging technology for its future electric cars

Porsche-grade technology will trickle down to the Kia range during the 2020s. The South Korean company is planning to launch no less than 11 electric cars globally by 2025, and it confirmed some will come with an 800-volt charging system that promises to slash charging times while reducing the drivetrain's weight. As of writing, the only series-produced model equipped with 800-volt technology is the Taycan; the production version of the Audi E-Tron GT concept will get it, too. Kia plans to bring it to the masses when it releases its next-generation electric cars on the European market in 2021. It hasn't detailed the models yet, but it revealed they will be built on a platform developed specifically to underpin EVs. One will "blur the boundaries between passenger and sport utility vehicles," a not-so-subtle hint that the segment-bending Imagine concept (pictured) unveiled in 2019 is headed to production. An earlier, unverified report claims Rimac will help Kia make it a reality. Building electric cars on a purpose-designed platform represents a stunning about-face for the brand. Its two battery-powered models, the Niro EV and the Soul EV, are variants of gasoline-powered models. Kia is also developing battery technology that promises to unlock up to 310 miles of driving range. It hopes the investments it's making will convince a growing number of buyers to give up gasoline once and for all. Taking this not-inexpensive route makes integrating technology like an 800-volt charging system much easier. Kia also wants to bring electric cars to the masses, so it will also offer 400-volt charging (which is widely available in 2020) to keep costs in check. It predicted motorists who drive more will pay extra for the 800-volt system, because it will deliver "sub-20-minute high-speed" charging times when plugged into a compatible station, while those who don't suffer from range anxiety will be able to save money by selecting a 400-volt system. "Certain models, particularly those aimed at more cost-conscious buyers, will offer 400-volt charging capability; 800-volt charging won’t simply be reserved for KiaÂ’s flagship models, however, but where it most closely matches the usage profile of a particular model line," said Pablo Martinez Masip, the director of product planning and pricing for Kia's European division. He added both systems can be charged at home or in public.

Polestar 3 and 5 updates, and a compact Toyota pickup? | Autoblog Podcast #733

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder. First, they discuss the news, including the possibility of a compact Toyota pickup, new details about the Polestar 3 and Polestar 5, whether Tesla needs a PR department and fresh info about the 2023 Honda HR-V. They also review the GMC Sierra, Kia EV6, Hyundai Kona Electric and Buick Enclave Avenir. Next, Consumer Editor Jeremy Korzeniewski reports from the ground at the first drive of the Ford Bronco Raptor, and Multimedia Producer Erik Maier joins in to talk about Autoblog's Father's Day gift guide and other deals. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #733 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 Toyota looking hard at compact pickup market Polestar 3 shows itself and looks good Polestar 5 electric sedan outed in EU patent images (and now we have spy shots) Does Tesla need a PR department? (via Automotive News) 2023 Honda HR-V pricing and specs revealed Cars we're driving: 2022 GMC Sierra 1500 Denali Ultimate 2022 Kia EV6 2022 Hyundai Kona Electric 2022 Buick Enclave Avenir Dispatch: 2022 Ford Bronco Raptor Father's Day gift ideas straight from the Autoblog staff Five excellent Father's Day deals for dads 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: