发动机尾气排放问题成为目前日益关注焦点。如何快速有效地预测尾气排放情况成为迫切需要解决的问题。文章首先利用FGA-4100四气尾气分析仪获得了TV7163GL车型尾气实验数据;接着利用origin软件画出内燃机排放物随过量空气系数和转速变化曲线;最后,利用排放特性曲线图反映双怠速工况下的燃烧与混合气形成情况,从而为改善发动机排放提供参考意见。 Engine exhaust emissions have become the focus of increasing attention. How to predict exhaust emissions quickly and effectively has become an urgent problem to be solved. The article first uses the FGA-4100 four-gas analyzer to obtain the TV7163GL vehicle tail gas experimental data; then uses the origin software to draw the internal combustion engine emissions with excess air ratio and speed curve; Finally, the emission characteristics of the curve reflects the dual-idling conditions Combustion and gas mixture formation, so as to provide reference for improving engine emissions.