The test on the(influence) of changing fuel supply advanceangle on fuel economy was carried out on single cylinder diesel engine separately using diesel fuel and ethanol-diesel blend fuel.
在单缸柴油机上分别使用纯柴油和乙醇柴油混合燃料，进行了改变供油提前角对发动机燃料经济性影响的试验。
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Finally, bench test was toke out on CNG engine, the influenceof ignition advanceAngle on dynamic and combustion characteristic was studied.