Hyundai CVVD

[AZjeff]

Just came across this, Hyundai Constantly Variable Valve Duration with claims of 4% performance increase and 5% efficiency increase. More valve train complexity but serious claimed gains.

Car & Driver article

 

[skyactiv]

This is a small part of the evolution needed to keep new gasoline powered vehicles available into the future.

 

[mclasser]

Hopefully, they did a better job designing this engine than they did the 2.4.