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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.

BMW tops Consumer Reports 2023 Brand Report Card

Feels like we wrote about Consumer Reports' 2022 Brand Report Car and 10 Top Picks a few weeks ago, but it was last April. So the mag is back with a ranked roster of 32 brands and 10 vehicles in four categories for your debating pleasure. Starting with the brands, last year's top three were Subaru, Mazda and BMW. This year, the Munich crew climbed two spots to win the prize thanks to "Superb road test scores and solid results in CR’s reliability and owner satisfaction surveys." Subaru narrowly fell to second, maintaining its four-year run in the top three. Mini, eighth last year, jumped five spots to get the last step on the podium. The rest of the top 10 were Lexus (up one spot from last year), Honda (down one spot from last year), Toyota (up three), Genesis (up 12), Mazda (down six), Audi (down three) and Kia (up eight). The magazine and testing outfit says its Brand Report Card "[reveals] which automakers are producing the most well-performing, safe, and reliable vehicles based on CRÂ’s independent testing and member surveys," and that "Brands that rise to the top tend to have the most consistent performance across their model lineups." Last year's top 10 had six automakers from Japan, three from Germany (giving Mini credit for England), none from the U.S. or South Korea, and five luxury brands. This year's list counts five makes from Japan, two from Germany because Porsche fell out of the top ten, two from South Korea, still none from the U.S., and four luxury brands. Buick again ranked as the best domestic, dropping to 12th after being 11th last year. The big mover was Lincoln, its 10-place jump up to 16th attributed to better reliability from the Corsair and Nautilus. Tesla's improved overall reliability saw it climb six spots to 17th. Dodge climbed one spot to 15th. Jeep got out of the penalty box in last to come second-to-last. Land Rover fell three places into the penalty spot.  CR's top 10 vehicle models The 10 Top Picks list is practically a new list. Only two holdovers made it to 2023, those being the Subaru Forester and Kia Telluride.

Hyundai and Turin IED collaborate on Kite buggy concept for Geneva

The last time Hyundai's European Design Center collaborated with Turin, Italy's Instituto Europeo di Design (IED), we got the PassoCorto concept in 2014. That four-year-old vision made an appearance in recent news feeds, as a potential harbinger of a mid-engine Hyundai sports car when the Theta II engine arrives. The Korean carmaker is at it again with IED, and this time the two have worked up a doorles, roofless, windowless buggy referred to as the Kite concept, planned for display at next month's Geneva Motor Show. The full-sized scale model measures 12.2 feet long, 7.3 feet wide, and 4.7 feet high — that's about four inches shorter and one inch taller than a Mini Cooper, but 20 inches wider. Being a model, the Kite won't be fitted with any powertrain, but the students behind the project envision one brushless electric motor on propulsion duty. This is the first of IED's previous 14 automaker collaborations to have an interior, so the 15 students from nine countries who worked on the project did their homework, tapping Gruppo Sila for the shift-by-wire gearbox, and Sabelt for the seat and seatbelts. Guests to the stand will be able to experience the Kite concept through virtual reality, while the whiz-bang gearbox gets shown in a separate, dedicated area. The design school's annual project serves as the thesis project for the Masters in Transportation Design program. Last year's offering, the Scilla concept prepared with Pininfarina, was a 180-degree departure from the Kite, but the students spent time off-road recently with their McLaren crossover concepts of 2010. If you're smitten with this year's product, you won't be able to buy it, but Hyundai does sell an actual kite. Related Video: Featured Gallery Hyundai Kite Concept News Source: Car Body Design via Carscoops Design/Style Green Geneva Motor Show Hyundai Concept Cars Electric Off-Road Vehicles 2018 Geneva Motor Show