利用混联双级NTP系统协同DPF和SCR同步降低柴油机PM和NOx排放，对NTP系统活性粒子物理消融悬浮碳粒和化学剥蚀积碳，以及NTP-SCR系统的化学反应机理进行研究。探索NTP系统电子能量分布及跃迁、活性物质种类及其生命周期规律，系统能量注入与排放污染物处理效率的动态函数关系；建立一级NTP喷射系统活性粒子物理消融悬浮碳粒模型，研究PM微观形态、粒径分布、数量浓度等物理特性的变化规律；建立活性粒子化学剥蚀积碳的化学模型，探索PM元素价态、失重特性、SOF组分等化学特性变化机制；建立改进型NTP-SCR模型，研究二级NTP串联系统对SCR活性温度窗口的柔性拓展能力，为利用NTP结合DPF和SCR技术同步降低柴油机PM和NOx排放奠定理论基础和科学依据。

In order to simultaneously reducing diesel PM and NOx emissions, the techonology of combining multiple-series twin-stage NTP system with DPF and SCR will be applied, the mechanism of activity particles produced by the NTP system physically ablationing suspending carbon particles and chemically erosioning depositional carbon, as well as the chemical reaction mechanism of NTP-SCR system will be researched. Firstly, Electron energy distribution, species and life spans of active particles in NTP system and the dynamic function relationship of pollutants treatment efficiency with power input will be studied; Secondly, to study PM physical characteristics, such as microscopic morphology, particles size distribution, the number of concentration variation ,a model of activity particles produced by the NTP system physically ablationing suspending carbon particles will be built; to explore chemical variation of the PM element valence state, weightlessness characteristics, SOF component , a model of activity particles produced by the NTP system chemically erosioning depositional carbon will be established, too. Finally, a modified NTP-SCR model will be set up to research the flexible expanding capacity of NTP tandem system to SCR activity temperature window.The work will lay a theoretical foundation and scientific basis for simultaneously decomposing PM and NOx of diesel using the techonology of multiple-series twin-stage NTP system combining with DPF and SCR.