柴油机边界条件对排放污染物的影响

以直喷柴油机为对象,研究柴油机排放特性以及边界条件对柴油机主要有害排放物的影响。在2种柴油机上分别进行部分工况排放试验,分析其排放特点,监测CO、NOx和THC等主要尾气排放物,对比和分析不同工况下排放物随燃油温度、中冷后温度、排气压力等的变化规律。结果表明:中冷后温度和排气背压对NOx排放均有明显的影响;中冷后温度对THC与CO排放影响较小;燃油温度对THC、NOx和CO影响不大。

Influence of Boundary Conditions on the Emission of Diesel Engine

The influence of emission characteristics and boundary conditions on the main harmful emissions of the direct injection diesel engine are studied. Through some operate-condition tests on 2 types of diesel engine, the emission performance is analyzed and the main exhausts such as CO, NO x , THC and so on are monitored to contrast the variation of emissions following fuel oil temperature, inter-cooled temperature, and exhaust pressure. The results show that the latter two have an obvious influence on NO x emission. The emission of THC and CO has been less affected by inter-cooled temperature. The fuel oil temperature does not have great influences on THC,NOx and CO.