2006 Kia Spectra Ex Sedan 4-door 2.0l on 2040-cars

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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.

2021 Kia Sorento engines, other details revealed before Geneva debut

The 2021 Kia Sorento was shown in official photos a few days ago, but we were missing all of the meaty details. Today, Kia has begun the process of parceling this information out, feeding us powertrain information and a few other interesting features of note. In North America, we can expect at least two engine options: a hybrid and a traditional gasoline-only engine. The latter is slated to be ready at launch — itÂ’ll consist of a 2.5-liter turbocharged four-cylinder, matched with an eight-speed dual-clutch automatic transmission. We imagine itÂ’s the same powertrain that we got a taste of in a pre-production Sonata N-Line not too long ago. In the Sorento, output is 277 horsepower and 310 pound-feet of torque. ThatÂ’s the same amount of torque as Hyundai said the Sonata N-Line will have, but itÂ’s down 13 horsepower compared to the semi-performance sedan. The hybrid powertrain, which is confirmed for the North American market, consists of a 1.6-liter turbocharged four-cylinder and single electric motor. Combined output amounts to 227 horsepower and 258 pound-feet of torque. Kia promises low emissions with high levels of performance, and with those power figures, we imagine the Sorento Hybrid wonÂ’t be a total bore to drive. ThatÂ’s it so far as North America powertrain news is concerned for now, but Kia promised more to come — weÂ’re told to expect additional gasoline engine options and “a powerful new plug-in hybrid variant.” Kia teased out a few details about the new platform this Sorento is riding on, too. The wheelbase is 1.4 inches longer than before, but the vehicleÂ’s overall length is only extended by 0.4 inch. Kia claims better packaging strategies will give the Sorento “class-leading cargo space.” The new platform also allows Kia to put the hybridÂ’s battery pack underneath the floor, claiming it has zero impact on passenger or cargo space. There were a few easter eggs at the end of KiaÂ’s release, too. The Sorento will be the first Kia to feature the companyÂ’s new “multi-collision brake system” that automatically applies the brakes when the airbags have been deployed after the initial collision. It also has a new “remote smartphone surround view monitor.” This will allow folks to look at the vehicleÂ’s surroundings on their smartphone through an app, in addition to seeing it in the infotainment screen.

UPDATE: 2021 Kia K5 name confirmed in fuel economy listing

UPDATE: Additional Kia K5 fuel economy data has been added to the FuelEconomy.gov website. It includes two sets of fuel economy numbers for what seems to be front-wheel-drive trims of the 1.6-liter turbocharged K5. You can find those numbers in the updated text below. The website has also seemingly removed the numbers for the all-wheel-drive version, but those are still present in this article. We've already seen Kia's new midsize family sedan, but details about it are still being fleshed out, including what it will finally be named. Based on a listing at the EPA's FuelEconomy.gov website, it seems the sedan will officially be known as the 2021 Kia K5, dropping the old Optima name. Besides the name, we also get snippets of information about one engine in multiple configurations. The engine in question is a turbocharged 1.6-liter four-cylinder, likely the same engine found in the Hyundai Sonata, which makes 180 horsepower and 195 pound-feet of torque. The Hyundai uses an eight-speed automatic transmission, and the Kia probably will, too. With what is likely the front-drive model, the K5 will get 29 mpg in town, 38 on the highway and 32 combined. There's also a version that gets slightly worse economy at 27 in town, 37 on the highway and 31 in combined driving. It's probably a heavier, more well-equipped trim. Both versions do get better fuel economy than the Sonata with the same engine (27 city / 36 highway / 31 combined). The third set of numbers is for the all-wheel-drive version, which will be unique to the Kia. According to the listing, it returns 26 mpg in the city, 34 on the highway and 29 in combined driving. Though all these numbers are for the 1.6-liter, there is another engine coming, which Kia has also previously said will be another turbocharged engine. It will probably be the 2.5-liter for the Sonata N-Line with 290 horsepower and 310 pound-feet of torque. With the Kia K5's option for all-wheel drive, it will join a growing group of midsize sedans with the drivetrain: the Subaru Legacy, Nissan Altima, Toyota Camry and the soon-to-be-discontinued Ford Fusion. Based on the engine size and output, this Kia K5 will be a direct competitor to the Altima and Camry, as well as the Legacy with the naturally aspirated engine. Depending on trim levels, the K5 ties or beats the Camry, which returns 28 to 29 mpg combined. The Altima returns 29 to 30 mpg combined depending on trim level, and the Legacy hits 30 mpg. Related Video: