With the increasingly strict emission regulations of countries around the world, reducing the particulate emissions of diesel engines is the focus of research. In this paper, the optimal asymmetry ratio was researched by comparing pressure drop under different operation conditions through the validated model. When soot loading is 0 g/L, the optimal asymmetric ratio is 1.1. When soot loading is 4 g/L, the optimal asymmetric ratio is 1.2. And performances of passive regeneration of catalyzed diesel particulate filters with different channel shapes were also studied. Based on the remaining soot loading, regeneration efficiency and pressure drop, the hexagonal channel has obvious advantages in NO2 assisted passive regeneration, followed by the asymmetrical square channel, and the octagonal channel is the worst.

随着世界各国排放法规的日益严格，降低柴油机的颗粒物排放成为研究的重点。本文通过验证模型比较不同工况下的压降，研究最佳不对称比。当烟灰负载为 0 g/L 时，最佳不对称比为 1.1。当烟灰负载为 4 g/L 时，最佳不对称比为 1.2。并研究了不同通道形状的催化柴油颗粒过滤器的被动再生性能。从剩余烟尘负荷、再生效率和压降来看，六边形通道在NO2辅助被动再生中优势明显，非对称方形通道次之，八边形通道最差。