结果表明：使用乙醇柴油混合燃料时，供油提前角的改变对燃料经济性的影响比较敏感，且相对使用纯柴油，适当减小供油提前角对提高燃料经济性有利。
The test result shows that the influence is more sensible when the ethanol-diesel blend fuel is used, and it is beneficial for increasing the fuel economy to reduce suitably fuel supply advance angle.
试验结果表明，催化转化器的位置距排气口近可提高排气温度，大大提高催化转化器的转化效率；推迟点火提前角和提高怠速转速均有利于使催化转化器进入快速起燃状态。
Experimental results show that the position of the converter nearer to the exhaust port, the retard ignition timing and the higher idle speed can promote the catalytic converter light-off.
合理的点火提前角也有利于稀限拓宽；
The suitable ignition advance angle is conducive to broadening lean burn limit.
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