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提出了成分权重的概念，并用它对直喷式柴油机13工况排放试验的排放特性进行了比较详细的分析研究。结果表明，直喷式柴油机排放中各工况的成分权重具有一定的规律性，且两种全负荷工况下各种有害排放物的成分权重最大，是降低排放的主要目标。
The concept of component weight was put forward and used to analyze the emission characteristics of 13 emission test of DI diesel engine in detail. The results show that the weight of components in each condition of direct injection diesel engine has a certain regularity, and the weight of all kinds of harmful emissions under the two full load conditions is the highest, which is the main goal of reducing emissions.