Hence, the diesel engine can not change its excessive air coefficient to change the emission when partly loading as the petrol engine.
因此，柴油机不能像汽油机那样可以改变过量空气系数来改变部分负荷时的排放。
The excessive air coefficient, flue gas emission temperature and fuel consumption are three major factors affecting the heat efficiency of the furnace.
过剩空气系数、排烟温度、燃料用量是影响加热炉热效率的三个主要因素。
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