聚甲氧基二丁基醚含氧燃料改善柴油机高原性能的试验研究

Improvement of Diesel Engine Performance in Plateau Based on Oxygenated Fuel of Polymethoxy Dibutyl Ether

在高原模拟试验台架上,模拟0 m,3700 m和4500 m海拔环境,对燃用柴油和100%聚甲氧基二丁基醚型含氧燃料(DMB100)的柴油机性能进行了研究。研究结果表明:在外特性工况下,燃用DMB100燃料可有效提高发动机的低速扭矩特性和扭矩储备系数;由于DMB100燃料本身含氧,燃用时可较为明显地降低柴油机单位功率的能量消耗率和空气消耗率;DMB100燃料的上述动力和经济性特征在高海拔工况更为显著;在部分负荷工况下,燃用DMB100燃料的能耗率和最高燃烧压力均有所改善,能耗率在低负荷工况改善明显,而最高燃烧压力在高负荷工况改善更加明显。

The performance of diesel engine was analyzed at 0 m,3700 m and 4500 m on a plateau-simulated test bench by using two different fuels of diesel and oxygenated fuel of polymethoxy dibutyl ether(DMB100).The results show that DMB100 can raise the low-speed torque and torque backup coefficient effectively.DMB100 can also improve the specific energy consumption and specific air consumption due to its oxygen-rich property.The above-mentioned power and fuel economy characteristics of DMB100 were more evident at high altitude.Besides,DMB100 can improve the brake specific energy consumption and peak combustion pressure of diesel engine at partial load.The brake specific energy consumption improves obviously at low load,while the peak combustion pressure improves more obviously at high load.