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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.

2015 Kia K900

Let's be honest, Rich America. When you drive your fullsize luxury sedans, you don't clock any laps of the Nürburgring. You don't view your car as an alternative to air travel, ready to wheel between countries at triple-digit Autobahn speeds. Heck, you don't even take the long way home. Instead, you commute in fender-to-fender gridlock looking to be assuaged by sybaritic luxuries, your ride serving as a four-wheeled extension of your living room. Yet when it comes time to vote with your pocketbooks, you overwhelmingly skew toward European driving values - German ones, more specifically. You favor the firm rides, firmer seats and quick steering of cars like the BMW 7 Series and Audi A8. What gives? That's what Kia is clandestinely asking with its new 2015 K900.
According to Kia PR director Scott McKee, this 200.6-inch bruiser of a sedan is all about "at-ease luxury." That's a notion that was once very much synonymous with American automakers' approach to big high-end sedans - effortless comfort above all other considerations. Sprawling room in every direction. Fine materials no matter where the hand falls. The automobile as an isolative cocoon. Once upon a time, Cadillac and Lincoln owned the Comfort First game, but these days, there's almost nobody playing - the Lexus LS and Hyundai Equus are the only cars in this end of the market, everyone else is busy aping German values.
Kia planners could claim that the K900 has been intentionally targeted at a different sort of customer - and indeed, during the press conference ahead of our first drive in Santa Barbara, there was some discussion of "a different kind of luxury" and seeking "confident individualist" buyers. But the truth is, the Korean premium car shoppers that this car was primarily designed for crave exactly the sort of plush luxury experience the K900 dispenses. In other words, Kia is hoping that there are a few thousand like-minded Americans willing to overlook the badge on its nose and give this car a chance.

2018 Kia Stinger GT becomes police car for Queensland, Australia

Now that Ford Falcon and Holden Commodore production has ceased in Australia, local authorities are encountering the same problems as United States law enforcement after the Ford Crown Victoria was discontinued: what to replace the aging police cars with? While some fleets will consist of BMWs and Chryslers in the future, News.com.au reports that Queensland police will go with Kia Stingers instead. The Stingers in question will be fitted with the twin-turbo V6 engine. The first 50 cars will hit the road this week, and 150 more will join them in the long run. According to News.com.au, Kia was pushing to get the pursuit car fleet deal, and it has been co-operating with the Australian authorities to modify the Stingers for police use. Road policing assistant commissioner Mike Keating said: "The Stinger performed very well in all areas and we had nothing but top reports from all the field officers. The result is a road policing first for us, the first foreign car to perform these duties." So, it seems that if any dystopic Mad Max science fiction scenarios were ever to take place in Australia, the vehicle of choice will not be a supercharged Ford Falcon Pursuit Special Interceptor, but a twin-turbo Kia Stinger instead. We think the Stinger name is very suitable for the occasion. Related Video: