中文摘要：

摘要：以甲苯掺比燃料作为汽油燃料替代混合物，利用零维单区化学动力学模型，在EGR率为20％时，分析和研究EGR中添加不同摩尔分数的CO、NO和CH20对汽油机HCCI燃烧的化学作用，进而分析添加物对生成物中有害物质的影响．通过模拟分析可知，不同摩尔分数的添加物可以使气缸内的温度和压力有一定程度的提高，同时能够降低废气中的CO、Nq和UHC等有害物质的排放．

英文摘要：

Toluence reference fuel （TRF）is selected as gasoline surrogate in present study. The single-zone kinetic model is employed to analyze the chemical effects of CO, NO and CH20 in exhaust gas on gasoline-fueled HCCI combustion when the EGR rate is 20%, and the impact of additives on harmful emissions in resultant is further ana- lyzed. It can be known from the simulation analysis that different mole fractions of additives can increase the temperature and pressure in the engine cylinder to some extent, reduce the emissions of CO and UHC, and inhibit the gen- eration of NOx emissions.