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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.

2017 Hyundai Equus spied testing in the Arctic Circle

The camouflaged next-generation Hyundai Equus has been picked off everywhere from South Korea to Colorado to Sweden, and our spy shooters caught it again in the Arctic Circle. The second generation, unveiled in 2010, continued to raise the luxury tide for the brand and it looks like the third generation will do the same again. Outside we predict another evolution of the brand's Fluidic Sculpture design under the eye of head designer Peter Schreyer, but this version will go in a direction that looks like it will be known only by its details; the side window opening, at least, has gone totally conservative, but we're told the are some very slick headlights up front and a "chrome-rich front fascia." Underneath, it will lose weight by being built on a lightweight derivation of the current BH platform that includes more high-strength steel and aluminum. The 5.0-liter V8 will get more power and better fuel economy, and rumors are that the 3.3-liter V6 could eventually play a role here with some forced induction assistance. An eight-speed transmission might come with its launch next year, but a ten-speed transmission is on the way, working in RWD and AWD guises. Related Video:

Hyundai readying 708-hp Sonata for SEMA

For the past two years at the SEMA show, the folks at Bisimoto Engineering have taken one of Hyundai's models and tuned it up to levels of power previously unimaginable. It started in 2012 with a 600-horsepower Elantra GT, and they outdid themselves last year with a 1,000-hp Genesis Coupe. This year Bisimoto's tuners are teasing their latest wild creation by starting with a normal 2015 Sonata and turning the wick up to 708 hp thanks to a long list of engine mods. The key in this massive injection of power is taking the regular 2.4-liter Theta-II four-cylinder engine and doing everything necessary so that it can actually withstand so much additional strain. That means introducing forged pistons and connecting rods and an improved valvetrain with new cams, plus a high-boost turbocharger to really up the ante. It's all then mated to a six-speed manual to get things rolling. "After hundreds of hours of testing, failure analysis and prototyping, 18 new products will be engineered and produced in house to produce 708 horsepower from the Sonata," said Bisi Ezerioha, owner of Bisimoto Engineering in Hyundai's release. While it might be pretty cool to find a 708-hp Sonata that looked completely stock at first glance, this is for the SEMA show after all, and it's all about showing off there. So in addition to the huge increase in horsepower, the Hyundai gets a complete aero upgrade, a coil-over suspension and a roll cage inside, in addition to other improvements. At the moment, only the rear of the car is being teased ahead of the November 4 reveal. Until we get to see more, scroll down to read Bisimoto's entire parts list to turn Sonata from a commuter into a racer. HYUNDAI PARTNERS WITH BISIMOTO FOR A THIRD YEAR TO CREATE 708 HORSEPOWER FLEX-FUEL 2015 SONATA 22/09/14 Bisimoto Engineering Focuses on Strengthening and Reliability to Create Most-Powerful Sonata Ever FOUNTAIN VALLEY, Calif., Sept. 22, 2014 – For the third year in a row, Hyundai is partnering with the powertrain gurus at Bisimoto Engineering, this time to create a 708 horsepower Sonata for the 2014 SEMA show in Las Vegas. Bisimoto's team specializes in extracting huge output from Hyundai's engines, like the 1000 horsepower Bisimoto Genesis Coupe that was built for last year's SEMA show. For this year's show, the team is using Hyundai's 2.4-liter "Theta-II" 4-cylinder engine as the starting point for their build.