汽油机燃烧稀混合气是降低有害尾气排放、燃油消耗率的有效途径。
Lean burn mixture combustion of gasoline engine is an effective approach for reducing emissions and fuel consumption.
介绍了一种汽油机的快速稀燃系统，并对该系统的喷油时刻，燃油调整特性，外特性及排气性能等进行了试验分析。
A lean mixture combustion system is presented in this paper. And the test effect of fuel injection time, fuel adjustment, miximum load speed and emission characteristics are analysed.
结果表明：稀燃发动机转速对其有害气体排放和燃油经济性的影响与稀燃吸附还原催化转化器稀燃运行时间与浓燃还原运行时间比值大小和绝对时间大小有关。
The results show that the effects of speed on the exhaust gas emission and fuel economy are related with the ratio value and the absolute time of lean burn and rich burn.
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