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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.

Rivian R1T, Mini Cooper Electric owners happiest with their EVs

The J.D. Power 2023 U.S. Electric Vehicle Experience (EVX) Ownership Study is out, and there's change at the top. With the swelling adoption of electric vehicles in the U.S. over in the past two years especially, the third year of the EVX study changes focus to first-time EV buyers. Those two factors encouraged change at the top of both premium and mass-market segments. Among premium EVs, the Rivian R1T pickup scored overall victory in its first year of eligibility with a satisfaction score of 794 out of 1,000. The Tesla Model 3 takes second place with 759 points. Tesla had won the top two premium spots in the study in 2021 and in 2022. The average score in the premium segment was 756. The Tesla Model Y (754), Audi E-Tron (735), and Polestar 2 (724) filled out the list of the five eligible models this year. Among the ten eligible mass-market vehicles, the Mini Cooper Electric nabbed the overall win by scoring 782. The Kia EV6 came second with 762 points, keeping Kia in the top two; the Kia Niro EV won the mass-market segment the previous two years. The Ford Mustang Mach-E (742), Hyundai Ioniq 5 (738), and Volkswagen ID.4 (735) completed the top five, the Niro EV (733) in sixth. All were above the segment average of 730. The four models fell below the segment average were the Ford F-150 Lightning (723), Chevrolet Bolt EUV (716), Chevrolet Bolt (711), and Nissan Leaf (698). How are the scores derived? J.D. Power worked with EV app maker and research firm PlugShare to get owner responses in ten areas: accuracy of stated battery range; availability of public charging stations; battery range; cost of ownership; driving enjoyment; ease of charging at home; interior and exterior styling; safety and technology features; service experience; and vehicle quality and reliability. Brent Gruber, executive director of the EV practice at J.D. Power, said, "Recent vehicle launches from both new brands and traditional automakers have had a profound effect on what factors are most important in the ownership experience. Today’s EV owners are looking for quality, reliability, driving enjoyment, safety and technology features." The Mini, in fact, scored highest of any premium and mass-market EV in the studyÂ’s highest-weighted index factor, quality and reliability.

370-hp Veloster by Fox Marketing rounds out Hyundai's SEMA lineup

Hyundai is certainly bringing the horsepower wars to Las Vegas next month. We already know that its SEMA lineup includes a 1,000-horsepower Genesis Coupe, but now the company has announced that it is teaming up with Fox Marketing to create a 370-hp Veloster Turbo.
Keeping the Turbo's 1.6-liter engine, this show car gets an extra 169 hp by adding a bigger turbo and intercooler, cat-back exhaust and nitrous and methanol injection... oh, and the engine runs on 101-octane racing fuel. The brakes have been upgraded with six-piston calipers and bigger rotors, while the suspension now includes adjustable coil-overs. And since this is SEMA, this Veloster Turbo gets the requisite flashy exterior styling.
Scroll down for the full press release, but we'll have some better shots of this Veloster in just a few weeks.