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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.

Hyundai, Kia recall 640,000 vehicles for leaks that can cause fires

DETROIT — Korean automakers Hyundai and Kia are recalling over 600,000 vehicles in the U.S. and Canada to fix a brake fluid leak that could cause engine fires. The recalls cover more than 440,000 Kia Optima midsize sedans from 2013 through 2015 and Kia Sorento SUVs from 2014 and 2015. Also covered are 203,000 Hyundai Santa Fe SUVs from 2013 to 2015. The affiliated automakers say brake fluid can leak inside a hydraulic control unit for the anti-lock brakes, possibly causing an electrical short that can lead to fires. Kia's recall will start Oct. 15, while Hyundai's will start Oct. 23. Dealers for both companies will inspect the control units for leaks and replace them if needed at no cost to owners. In company documents posted Thursday by U.S. safety regulators, Hyundai said it had 15 reports of engine fires caused by the fluid leaks, while Kia said it had eight. Hyundai said it's not aware of any injuries, and Kia said it had none. Hyundai said in a statement that there's no need to park vehicles outdoors before the problem is fixed, but if the anti-lock brake warning light comes on, owners should not drive their vehicles and should contact a dealer. They also should disconnect the 12-volt battery by removing the positive cable, the company said. Hyundai documents said the company received its first complaint about an engine fire in a 2014 Santa Fe in April 2018, and it started an investigation. Kia began investigating after getting a complaint of a melted control unit in a 2015 Sorento last February. The recalls are the latest in a series of engine fire problems that have plagued the two automakers and have touched off investigations by the U.S. National Highway Traffic Safety Administration. In February, Hyundai recalled nearly 430,000 small cars for a similar but apparently unrelated problem. The company said water can get into the antilock brake computer, cause an electrical short and possibly an engine fire. That recall covered certain 2006 through 2011 Elantra and 2007 through 2011 Elantra Touring vehicles. The company said the electrical short could cause a fire even when the cars are turned off. Hyundai said the latest recall is not related to the previous recalls or the U.S. investigations.

Kia will launch a fully autonomous car by 2030

Kia promises to have a fully autonomous vehicle on sale by 2030, and the South Korean automaker will provide an early preview at that next-gen tech by launching the Drive Wise sub-brand at the Consumer Electronics Show. The new branding will encompass all of the company's advanced driver assistance systems and innovations in the human-machine interface over the next 15 years. Before Kia's fully driverless vehicle hits the street, the company thinks that partially autonomous Drive Wise technology could be ready by 2020. These early steps are largely what the company has on display at CES. Tech like Highway Autonomous Driving and Urban Autonomous Driving use sensors and GPS to allow a model to control itself. An Emergency Stop System can automatically get the car off the road if there's a problem, and an electronic valet would even allow a vehicle to park without a driver inside. Kia took a major step toward its autonomous future in December 2015 when it received permission from Nevada to test driverless tech on public roads there with a Soul EV (pictured above). The company and Hyundai have also pledged $2 billion in research through 2018 to help bring these advanced systems into production. Kia also folds future in-vehicle tech under the Drive Wise branding, and its I-Cockpit concept shows some of these solutions off at CES. This demonstrator of a next-gen vehicle cabin supports gesture controls and can detect an owner's fingerprint to adapt the interior to the person's preferred music and climate settings. Autonomous tech is one of the hottest parts of the auto industry right now, and a host of companies are ready to challenge Kia's coming innovations. For example, General Motors plans to test a network of driverless vehicles with ridesharing service Lyft, and Ford and Google might form a similar partnership. BMW also could show of a concept with a nearly production-ready solution early in 2016. Kia Motors introduces new 'DRIVE WISE' sub-brand for autonomous driving technologies - Kia 'DRIVE WISE' encompasses future Advanced Driver Assistance Systems - DRIVE WISE intelligent safety technologies exhibited at 2016 Consumer Electronics Show in Las Vegas - U.S.