不同大气压力下B10生物柴油混合燃料对柴油机性能的影响

为了探索掺烧生物柴油后大气压力对柴油机性能的影响和变动规律，在高压共轨柴油机上进行了不同大气压力下燃用纯柴油与B10混合燃料的对比试验研究．试验结果表明：随着大气压力升高，两种燃料的动力性均呈上升趋势，有效燃油消耗率和排气温度均呈下降趋势；气压从100kPa下降至81kPa时，外特性的中、高转速区域动力性下降0．7％～3．1％，中、低转速区域动力性下降2．9％～17．8％；在相同气压下，燃用B10混合燃料的动力性比纯柴油时下降0．7％～2．6％，有效燃油消耗率上升0．7％～3．5％．

Effects on Performance of a Diesel Engine Fueled with B10 Biodiesel Blend Under Different Atmospheric Pressures

In order to explore the changing rules and influence of atmospheric pressure on performance of the diesel engine while burning blended fuel with bio - diesel, the comparative experiments are carried on between pure diesel oil and B10 bio - diesel blended fuel on the bench of high - pressure common rail diesel engine under different atmospheric pressures. The results indicate that the power performance is increasing along with the ris- ing of atmospheric pressure, and the brake specific fuel consumption and exhaust temperature is dropping. With the dropping of atmospheric pressure from 100kPa to 81kPa, there is a 0.7% -3.1% dropping on power per- formance when the engine runs at middle or high rotation speed. When the engine runs at lower or middle rota- tion speed, the power performance declines by 2. 9% - 17.8%. Compared with burning diesel, the power char- acteristics of diesel engine using B10 declines by O. 7% -2.6% , while brake specific fuel consumption increa- ses by 0. 7% -3.5%.