用自行设计的喷气式可变涡流进气系统 (AIVSIS)调节气缸内的涡流水平 ,试验研究了进气涡流对车用直喷式柴油机微粒排放的影响。结果表明 ,中速工况为较低的微粒比排放工况 ,螺旋进气道形成的涡流水平基本可以满足燃料燃烧的要求 ,改变涡流水平对改善柴油机微粒排放贡献不大。而低速高负荷工况是柴油机较高的微粒比排放区 ,适度提高气缸内的涡流水平 ,可以有效降低柴油机微粒的排放量 ,使微粒降低的主要因素是不可溶组分排放的降低。高速工况螺旋进气道形成的涡流水平较高 ,降低气缸内的涡流水平可以降低柴油机微粒的排放量 ,使微粒排放降低的主要因素是可溶性有机组分排放的降低 The eddy current level in the cylinder was adjusted by the self-designed AIVSIS, and the effect of intake vortex flow on the particle emission of the vehicle direct-injection diesel engine was experimentally studied. The results show that the mid-speed condition is lower than the particulate emission. The eddy current formed by the spiral inlet can basically meet the requirements of fuel combustion. Changing the eddy current level has little effect on improving diesel particulate emissions. The low-speed and high-load condition is the diesel engine higher particle than the discharge area, moderate increase in the cylinder eddy current level, can effectively reduce diesel particulate emissions, the main factor to reduce particles is reduced emission of insoluble components. High-speed conditions of the spiral inlet formed a high level of eddy current, reduce the level of eddy current cylinder can reduce diesel particulate emissions, the main factor to reduce particulate emissions is the emission of soluble organic components decreased