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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 confirms Cub "four-door coupe" concept for Seoul

Kia has announced it is headed to the Seoul Motor Show with a new sedan concept. Details are still scarce, but the Kia CUB Concept should be small, at under 13 feet long and come with coupe-like proportions. Kia wants the vehicle to "appeal to trend-setting urban dwellers," a notoriously car-hungry market. The automaker says the Cub has a cheerful face decorated with two-point LED headlamps just like those found on the Quoris flagship, but the teaser image above looks a bit more sinister than happy to us. Kia plans to give the Cub a proper unveiling on March 28.
Hyundai has also given us a glimpse at what the company has planned for Seoul with its HND-9 luxury sports coupe. You can refresh yourself on that machine by checking out the post here. You can also take a closer look at the brief press release below.

Kia plies SEMA attendees with beer and ice cream food trucks

Kia's 2014 SEMA Show theme is "A Day At The Races," and in addition to a very powerful K900 luxury sedan, the company has revealed several vehicles that would make any day at the track more comfortable - and tasty.
The Ballast Point Sedona is a complete about-face for Kia's minivan, turning the family hauler into a beer truck for infield parties. As the name implies, the Sedona features beer on tap from the Ballast Point, a San Diego-based craft brewery. The vehicle also has restaurant-grade stainless steel counters, extra space for kegs and audio speakers integrated into the roof.
After seeing this Sedona, we actually now kinda like the idea of a minivan-based truck model. Are we nuts?