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用排气后处理方法来降低柴油机有害排放量已成为一个重要的研究方向。本文分析了柴油机排气后处理装置的结构、效率及存在的问题，并且给出了一些结构实例和研究结果。
It has become an important research direction to reduce the harmful emissions of diesel engines by exhaust aftertreatment. This paper analyzes the structure, efficiency and existing problems of diesel exhaust after-treatment device, and gives some examples and results of the structure.