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恒转速增转矩瞬态工况下微粒排放的影响。结果表明 ,对于一定涡流比的瞬态工况 ,随着转矩变化率的增大 ,柴油机的微粒排放量逐渐增加。涡流比越小 ,瞬态工况微粒的排放随转矩变化率增大的速率越高。相同转矩增长率的瞬态工况 ,随着涡流比的增大 ,柴油机微粒的排放量逐渐降低。提高恒转速增转矩瞬态工况气缸内的涡流强度 ,可以降低柴油机微粒的排放量 AIVSIS was used to adjust the eddy current level in the cylinder. The influence of intake vortex flow on the particle emission under the transient torque condition of constant speed and constant torque of the vehicle direct injection diesel engine was experimentally studied. The results show that the particulate emissions of diesel engine increase gradually with the increase of torque variation rate for a certain transient condition of eddy current ratio. The smaller the eddy current ratio is, the higher the rate of transient emissions increases with the rate of torque variation. The same torque growth rate of transient conditions, with the eddy current increases, diesel particulate emissions gradually reduced. Increasing the eddy current intensity in the transient working condition cylinder with constant revolving speed to reduce the emission of diesel particulates