Hyundai’s new Constantly Variable Valve Period tech boosts each energy and effectivity – Roadshow

The image may not appear to be all that a lot, however the advantages CVVD brings will probably be essential as emissions laws proceed to strengthen.

Hyundai

Variable valves are nothing new within the auto trade — should you’ve heard one “VTEC Is kicking in” joke, you’ve got little question heard ’em all. However that is to not say the concept behind variable valves has been utterly explored, as we have discovered from Hyundai and its newest piece of engine tech.

Hyundai on Wednesday unveiled its new Constantly Variable Valve Period (CVVD) expertise. In accordance with the automaker, it is able to growing efficiency by four% whereas concurrently bettering gasoline effectivity by 5% and reducing total emissions by 12%. These are some fairly spectacular numbers, contemplating how trendy engines are already squeezing out as a lot efficiency and effectivity as potential.

Not like different methods we have heard about previously, CVVD works by extending the time valve stays open. Particularly, the expertise opens the consumption valve throughout the center and finish of the compression stroke, which Hyundai claims reduces compression resistance, when the automobile is at a continuing pace and does not want most engine output. When an individual places the pedal down, the consumption valve closes firstly of the cylinder’s compression stroke, maximizing the quantity of accessible air and bettering efficiency.

That period bit is vital to understanding the distinction between this and different variable-valve applied sciences. Variable valve timing adjusts when engine valves open and shut throughout the common four-stroke cycle. Variable valve raise controls the quantity of air getting into the cylinder by altering how far the valve opens. CVVD, in accordance with Hyundai, permits for extra flexibility based mostly on the present driving model.

Hyundai’s CVVD tech will make its debut in Hyundai’s new Smartstream engine household, which is able to seem within the new Sonata and Venue automobiles to start out. Particularly, it will likely be included in a 1.6-liter turbocharged I4 with 180 horsepower and 195 pound-feet of torque. That motor will make its first look within the Hyundai Sonata Turbo, which is slated to return out later this yr.

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