The performance of Common Rail Diesel engine fueled with diesel fuel (DO) and different blending ratio of Bio-diesels ((B10,R20,B30,B50) under Plateau Environment (81 kpa, tests comparatively the characteristics like engine power, economy and smoke is discused. The results show that the engine fueled with different blending ratio of Bio-diesels has higher brake specific fuel consumption in comparison with BO fueled engine, but it has lower power and lower smoke. But with the increase in bio-diesel blending ratio, engine power and smoker drops, fuel consumption increases.%研究了在高原地区(81 kPa)掺烧不同比例生物柴油(B10,B20,B30,B50)在高压共轨柴油机上的性能.对发动机的动力性、经济性、烟度进行对比试验.结果表明:燃用一定比例的生物柴油发动机实测油耗增加,并且随生物柴油掺烧比例增加而增加；动力性和碳烟排放降低,并且随着生物柴油掺烧比例的增加逐渐降低.
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