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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.

2016 Kia Sorento First Drive

Teenagers are awkward, predictably provocative and generally horrible to be around – at least unless you, yourself are one. There's just something about those angst-ridden years spent trying on identities, none fitting quite right. Luckily for Kia, the automaker has just celebrated its 20th birthday in America, and fresh out of the driver's seat of its 2016 Sorento – dare we say it – we sense a touch of self-assured maturity. Don't worry; we expect the automaker's antics – including super-freak athletes jumping over an Optima at the NBA All-Star game and the employment of urban hamsters – to continue. Thankfully, offering unremarkable vehicles in pretty competitive segments seems officially a thing of Kia's history e-book. To be fair, we've seen a pleasing Korean Renaissance for a few years now, and we're not just talking hot pots and bulgogi – 2015 Hyundai Genesis, anyone? Kia Optima SX? Soul? So where exactly does this third-gen 2016 Sorento fit in? Actually, we're not sure Kia knows that either; its product planners tell us that this miraculous crossover competes with variously sized vehicles including the compact Jeep Cherokee, markedly larger Grand Cherokee, and even the family-hauling three-row Toyota Highlander. But Kia is also not completely off its rocker, because the Sorento suffers (benefits?) from severe bipolar disorder in terms of pricing. While you can get a base L model for $25,795 after delivery – there are five trim levels including L, LX, EX, SX, and top-of-the-line SXL – the fancy SXL 2.0T with all-wheel drive we tested was priced at $45,305. That's a difference of almost $20k, with the latter model reaches a completely different, almost premium demographic. And there's more. Sometimes the Sorento seats five, other times it can party hard with seven. There are three very different engine flavors to choose from: a carryover 2.4-liter four-cylinder will greet entry-level buyers with 185 horsepower and 178 pound-feet of torque. A meatier V6 – good for 290 hp and 252 lb-ft – will come on three-row models only, while the new 2.0-liter turbocharged four option, good for 240 horses and 260 lb-ft comes on two-row models exclusively. Kia will offer all-wheel drive on all Sorento models.

2018 Kia Stinger GT First Drive Review | Sleeper of the year

MOJAVE, Calif. — The sunbaked sign at the Hyundai/Kia Proving Grounds clearly indicates the speed limit on the banked oval: 120 miles per hour. But after a few perfunctory triple-digit parade laps, the Kia representative in the passenger seat isn't having any of it. With a wink and nudge, he discreetly permits us a few extra, unrestricted goes around the big course. Never one to turn down track time, we push the 2018 Kia Stinger down the 6.4-mile oval until I see an indicated 164 mph on the straight — the fastest we've ever driven anything built in Korea, let alone many of the contenders in the Stinger's crosshairs. Game on, Kia. The early days of Kia's attempt to conquer the American car market were dominated with an appliance-like sense of economy, one reflecting a scrappy catch-up mentality opposed to the disruptive, luxury challenging tactics du jour. Subsequent attempts to globalize the brand have taken on a definitively more inspired, international flair, and the new Stinger is the strongest harbinger of that direction to date. The movement originated when Hyundai/Kia plucked design boss Peter Schreyer from Audi, eventually moving him up in an unprecedented promotion to one of manufacturer's three group presidents. Not only did Schreyer inject a sleek, contemporary look to the lineup, his promotion proved the brand was dead serious about creating striking designs. The Stinger's styling does not disappoint. Apart from the familiar Tiger Nose grille and the letdown of non-functional (ie, ornamental) "hood vents," the five-seater's proportions and surface treatments feel sharp and fresh, purposeful and clean. Measured from bow to stern, the Stinger is roughly mid-class among its competitive set, while offering the practicality of a sportback design that enables decent rear legroom and 23.3 cubic feet of cargo capacity. But its considerable 114.4-inch wheelbase is among the lengthiest in its class, edged out only by the Audi A7, Porsche Panamera, and BMW 6 Series Grand Coupe. That said, the upper end of Kia's self-ascribed competition might be a bit of a stretch (sorry, pun intended) considering the unlikelihood of Porsche die-hards cross-shopping the $85,000 Panamera against this new kid on the block. The other side of Kia's modern story involves the snagging of performance whisperer Albert Biermann from BMW's M performance division.