凸轮轴是发动机配气机构的一部分,其作用是保证发动机在工作中定时为汽缸吸入新鲜的可燃混合气,并及时将燃烧后的废气排出汽缸。凸轮的角度和形状决定了气门的开合时间和气门的开启高度,所以精确度非常重要。此外,考虑到发动机的耐久性和运转的平顺性,气门不能因开合动作中的加速产生过多过大的冲击,否则会造成气门的严重磨 Camshaft is a part of the engine valve mechanism, its role is to ensure that the engine in the work of timing for the cylinder inhalation of fresh combustible mixture, and timely combustion of exhaust emissions from the cylinder. The angle and shape of the cam determine the valve opening and closing time and valve opening height, so accuracy is very important. In addition, taking into account the durability of the engine and smooth operation, the valve can not be too much impact on the acceleration and deceleration in the opening and closing operation, otherwise it will cause severe valve wear