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.
控制有害气体的排放，将有害气体转化为无害气体的有效措之一就是采用三元催化转化器。
One of the most effective measures to control pernicious gases ejection and turn them into harmless gases is to use ternary catalyst.
模拟结果显示了起燃过程中催化转化器载体温度场以及气体浓度场的变化。
The result shows the change of its temperature field and concentration field in light-off course.
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