World’s First Production CVVD Continuously Varies Valve Duration Engine

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The world’s first production CVVD engine! CVVD stands for continuously variable valve duration. This technology is currently used in the 1.6L turbo engine of the 2020 Hyundai Sonata. In order to understand it we need to understand how valves work on an engine. Of course, you have the four engine strokes: intake, compression, power, and exhaust. Intake you have the intake valve open, obviously...

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