2010 Hyundai Accent Gs 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.

Renault, Nissan and Hyundai face shutdowns in India over workers' COVID fears

CHENNAI, India — Automakers Renault, its alliance partner Nissan and Hyundai face temporary factory closures in India due to growing unrest among workers concerned about rising COVID-19 infections. Workers at Renault-Nissan's car plant in the southern state of Tamil Nadu will go on strike on Wednesday because their COVID-related safety demands have not been met, a union representing the workers told the company in a letter on Monday. Hyundai said it would suspend operations at its plant, also in Tamil Nadu, for five days starting Tuesday, after several workers staged a brief, sit-in protest on Monday amid rising cases in the state. "The management agreed to close the plant after workers expressed concerns over safety after two employees succumbed to COVID," E. Muthukumar, president of the Hyundai Motor India Employees Union, told Reuters. The unrest highlights the challenges companies face in India amid a huge wave of COVID-19 infections, an overwhelmed health system and a shortage of vaccines which is making employees more fearful. Tamil Nadu is one of the worst hit states with more than 30,000 cases a day last week. The state, an auto hub known as India's Detroit, has imposed a lockdown until May 31 but allowed some factories, including auto plants, to continue operating. The strike threat at the Renault-Nissan plant came ahead of a court hearing on Monday over allegations from workers that social distancing norms were being flouted and factory health policies did not sufficiently address the risk to lives. Renault-Nissan has said it is following COVID-19 safety protocols. At the hearing, a lawyer for the workers argued that while the company had reduced the number of shifts, production numbers had not been cut and the headcount remained the same leading to crowding on the factory floor. The company told the court it had reduced the workforce to around 5,000 from 8,000. It also said it had vaccinated employees over 45 and was willing to inoculate those under 45 if vaccines were made available. The two-judge bench presiding over the case said that while the health of workers is paramount, if industries go down there will be no place for them to work. They also said the company must not take advantage of the exemption granted by the state and should reduce production to meet only necessary export orders. "The production should have fallen ... You also have to assuage the feeling of the workers," said the court, which will next hear the case on May 31.

2015 Hyundai Sonata

Completely redesigning a vehicle competing in a fiercely contested segment requires delicately balancing styling, performance, safety, efficiency, innovation, passenger comfort and pricing, while simultaneously not alienating model loyalists. In other words, it's no simple task.
Automakers generally follow one of two paths. Some take a conservative approach and choose to raise each bar marginally, in an effort to appease all and estrange none. Others strategically take risks and focus on specific attributes in an attempt to shift perception about their vehicle.
With its all-new 2015 Sonata, Hyundai has taken the second approach when overhauling one of its best-selling vehicles. The Korean automaker has executed an impressive number of targeted improvements, yet it's also softened some of its predecessor's qualities in an attempt to demonstrate greater refinement and position its midsize sedan upscale. Whereas the outgoing car successfully aimed to establish itself as a credible contender in the midsize segment, the new model is gunning for customers that might otherwise be seeking entry-level models from luxury automakers.