All of those letter scrambles are part of the wonderful world of variable ... low valve lift and short duration that work so well in a normal engine would strangle the high-power motor.

As just one example, BMW’s N55 turbocharged inline-six engine combines adjustable phasing of both the intake and exhaust cams with variable intake-valve lift ... acting DC motor that controls ...

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 ...

Set to debut in a new 1.6-liter 4-cylinder Smartstream turbo engine, Hyundai's new valve ... Hyundai calls it the "world's first continuously variable valve duration (CVVD) technology," and ...

Nissan has now announced a new method of valve actuation that delivers a balance of responsiveness and power, fuel efficiency and low emissions. The system combines Nissan’s new Variable Valve ...

That duration bit is key to understanding the difference between this and other variable-valve technologies. Variable valve timing adjusts when engine valves ... That motor will make its first ...

Also, the engine is equipped with variable valve-timing technology ... will be officially revealed on September 29 at the Paris Motor Show.