Variable valve mechanism having an eccentric-driven frame

摘要

A variable valve mechanism includes an elongate input shaft having a central axis. An input cam lobe is disposed on the input shaft and is eccentric relative to the central axis. A guide member is pivotally mounted on the input shaft. A frame is disposed in engagement with the input cam lobe, and is pivotally and slidably coupled to the guide member. A link has a first end pivotally coupled to the frame. An output cam is pivotally mounted on the input shaft. The output cam is pivotally coupled to a second end of the link arm. The output cam is configured for oscillating engagement of a roller of a roller finger follower.