通过研究不同理化特性的石化柴油在稳态与瞬态加载工况下对发动机颗粒排放的影响，得出以下结论：就着火性能而言，随着十六烷值增加，小负荷下颗粒总数与集聚态颗粒数量浓度先下降后略有上升，而核态颗粒数量浓度持续上升，中大负荷下核态与集聚态颗粒数量浓度均逐渐增加，瞬变加载过程中的颗粒数量浓度先下降后变化不大；就蒸发性能而言，随着芳烃含量提高，小负荷下核态与集聚态颗粒数量浓度均先减少后基本保持不变，中大负荷及瞬变工况下两者数量浓度均未出现明显变化。

The effects of petrochemical diesel fuels with different physicochemical properties on engine particle emissions were investigated under steady state and transient loading conditions. Regarding ignition performance, as the cetane number increased under low load conditions, the total particle number concentration and accumulation mode particle number concentration initially decreased and then increased slightly, while the nucleation mode particle number concentration continued to rise. Under medium and high load conditions, the number concentrations of both nucleationmode and accumulation mode particles increased gradually. During transient loading processes, the number concentration of total particles first decreased and then stabilized. In terms of evaporation performance, as the aromatic content increased under low load conditions, the number concentrations of nucleation mode and accumulation mode particles first decreased and then remained largely unchanged. Under medium and high load conditions and transient operating conditions, no significant changes were observed in the number concentrations of both types of particles.