中文摘要：

阐述了DPF喷油助燃再生的工作原理,在考虑过滤体内沉积微粒氧化反应次模型的基础上,以壁流式蜂窝陶瓷过滤体为研究对象,建立柴油机稳态工况下过滤体入口孔道的再生简化模型。考虑到柴油机中小负荷排气富氧条件,通过无量纲化,结合DPF的排气背压模型,得到了喷油助燃再生DPF时过滤体入口端所需的温度条件。试验表明,以该条件获得的理论过滤体入口废气温度所对应的喷油率来调节燃烧器功率可顺利实现DPF的再生过程,为DPF喷油助燃再生系统的设计提供了一定的理论依据。

英文摘要：

The operation principle of a burner-type diesel particulate filter was presented.Taking the subordinate oxidation reaction model into consideration,and taking the honeycomb wall-flow ceramic monolith filter as a research object,the simplified regeneration model in the single inlet channel of the filter was built at the steady state of the diesel engine.Based on the non-dimensionalization and the exhaust back-pressure model of DPF,the required temperature condition of the inlet exhaust for the burner-type DPF was obtained.The tests showed that the DPF regeneration could be smoothly completed by the burner power adjustment according to the oil spray rate correspond to the theoretical inlet exhaust temperature.It provided a definite theory basis to the design of the burner-type DPF.