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。

The test on the(influence) of changing fuel supply advance angle on fuel economy was carried out on single cylinder diesel engine separately using diesel fuel and ethanol-diesel blend fuel.

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重点叙述了国内外内燃机油燃料经济性能及油品规格的要求，介绍了评价燃料经济性的试验方法。

Fuel economy performance and some the latest specifications of inter-combustion engine oil at home and abroad are recounted. Test method of fuel economy performance is introduced.

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提出了一种用于农用运输车设计中预测燃料经济性的有效、简易方法，经计算与验证试验结果误差较小。

A simple and convenient method to forecast the fuel consumption of farm transporter in design is put forward. The error between the calculating and verification testing result is less.

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