VARIABLE CAMSHAFT

A variable camshaft includes a base shaft, an axially movable structure, and an actuator. The axially movable structure includes a plurality of lobe packs and at least one barrel cam defining a control groove having an engagement region, a first shift region, a balancing region, a second shift region and a disengagement region. The actuator includes at least one pin operatively configured to moverelative to the actuator body between a retracted position and an extended position into the control groove. The axially movable structure moves axially relative to the base shaft the pin is in the extended position and is at least partially disposed in one of the first or second shift regions of the control groove. 种可变凸轮轴包括基轴、轴向可移动结构和致动器。该轴向可移动结构包括多个凸角组合件和至少个限定控制凹槽的筒形凸轮，该控制凹槽具有接合区域、第转换区域、平衡区域、第二转换区域和分离区域。该致动器包括可操作地构造成在收缩位置与延伸位置之间相对于致动器主体移入控制凹槽中的至少个销。该轴向可移动结构相对于基轴轴向移动，并且销处于延伸位置并至少部分地设置在控制凹槽的第转换区域或第二转换区域中的其中个中。