【摘要】 根据对气门正时、气门升程、气门开启持续期及气门动作速度等参数进行调节的方式 ,对发动机各种可变气门系统进行了分类 ,介绍了不同系统的组成、工作原理及其特点。更多还原

【Abstract】 A lot of variable valve systems(VVS)have been developed to adjust valve timing, lift, opening duration and velocity. Several types of VVS have been described from their structures, principles and characters according to the methods used to adjust the parameters.更多还原