Hyundai claims it has created the world's first Continuously Variable Valve Duration (CVVD) engine technology, which it says increases engine performance by 4 percent and efficiency by 5 percent. The ...

Set to debut in a new 1.6-liter 4-cylinder Smartstream turbo engine, Hyundai's new valve tech is able to continuously change the duration of valve openings to suit driving conditions, which Hyundai ...

Set to be launched with the new Sonata sedan later this year, the CVVD system forms part of the company’s ‘Smart Stream’ engine and transmission family, which aim to optimise both performance and fuel ...

Even as electric cars become more common, automakers are still trying to squeeze more efficiency out of internal-combustion engines. That’s led to more complex solutions to the age old task of mixing ...

Hyundai recently introduced a new piece of engine tech into its lineup called Continuously Variable Valve Duration (CVVD). Similar to variable valve timing or variable valve lift, it physically alters ...

Hyundai last week announced that it has developed what it claims is the world’s first mass-production continuously variable valve duration (CVVD) technology. The company asserted the new valve tech, ...

Cars are Andrew's jam, as is strawberry. After spending years as a regular ol' car fanatic, he started working his way through the echelons of the automotive industry, starting out as social-media ...

Internal-combustion engines are now all about the trade-off between power and efficiency. Until now, the tools to address that trade-off have been variable valve timing and variable valve lift, which ...

Altering the length of time that a valve stays open is way trickier than changing when it begins its open-and-close cycle or how much it lifts. To achieve variable duration, Hyundai has basically had ...