本文通过研究过量空气系数对炉内火焰的影响规律，指出在煤粉无油点火初期不宜补充大量二次风。
Through experiments of excess air coefficient on the PC combustion in stove, it is concluded that it is no use to add too much air at the beginning of free-oil ignition of PC.
通过试验研究了二次空气的进气形式、进气位置、进气量和发动机工况等对系统净化效果的影响。
A series of experiments is carried out to test the influence of the type, position and quantity of secondary-air influencing the system on engine performances.
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