摘要
在车用汽油机排气中CO和HC生成与热反应净化机理研究的基础上 ,通过试验探讨了二次空气对提高车用汽油机排气热反应净化效果的影响。研究结果表明 ,在发动机高速大负荷工况下 ,足量的二次空气能使CO和HC的排放浓度大幅度降低 ,而在发动机中等转速中小负荷工况下 ,由于排气温度低 。
Through test,this paper discusses the influence of the Secondary air on the improvement of thermal reaction purification in the exhaust gas of automobile gasoline engine ,based on the research of formation mechanism of CO & HC and thermal reaction purification in exhaust gas of automobile gasoline engine.The result shows that under the engine condition of high speed and high load,an enough amount of secondary air greatly reduces the emission concentrations of CO and HC,and under the engine condition of medium speed & medium and low loads,the effect of secondary air is not obvious because of the low exhaust temperature.
出处
《车用发动机》
北大核心
2000年第5期34-36,共3页
Vehicle Engine
基金
广东省环保科技经费资助项目! (粤 1 999-1 8)
关键词
车用汽油机
排气
热反应净化
二次空气
gasoline engine
emission
thermal reaction purification
secondary air
