Shifting camshaft groove design for load reduction

A camshaft assembly includes a base shaft including at least one lobe pack axially movably mounted on the base shaft, the lobe pack including a control groove therein. An actuator device includes a pin movably mounted to the actuator between a retracted position and an extended position for engaging with the control groove to cause axial movement of the lobe pack. The control groove includes a pin engagement region, a shifting region and an ejection region. The pin engagement region of the control groove has a first pair of sidewalls. The shifting region extends from the pin engagement region and has a second pair of sidewalls angled relative to the first pair of sidewalls and having a first portion with a varying groove width that varies relative to a groove width of the pin engagement region. 种凸轮轴组件包括基轴，基轴包括可轴向移动地安装在基轴上的至少个凸角组合件，凸角组合件包括位于其中的控制槽。致动器装置包括销，销在缩进位置和伸展位置之间可移动地安装至致动器，用于与控制槽接合以使得凸角组合件轴向移动。控制槽包括销接合区域、移动区域和弹射区域。控制槽的销接合区域具有第侧壁对。移动区域从销接合区域延伸，且具有第二侧壁对，第二侧壁对相对于第平行侧壁对成角度且具有带有变化的槽宽度的第部分，该变化的槽宽度相对于销接合区域的槽宽度