【摘要】 在1台高压共轨柴油机上研究了柴油-异丙醇混合燃料的燃烧与排放特性。结果表明：在不同发动机负荷和不同EGR率下，与柴油相比，柴油-异丙醇混合燃料的滞燃期明显延长，预喷燃料峰值放热率增加，主喷燃料峰值放热率略有降低，中高负荷下扩散燃烧强度明显增加，峰值缸内平均温度增加；NO_x排放略有增加，炭烟排放、颗粒物数量浓度和体积浓度均显著降低。与燃用柴油相比，柴油-异丙醇混合燃料联合EGR可以同时降低NO_x和颗粒物排放。更多还原

【Abstract】 The combustion and emission characteristics of diesel and isopropanol blended fuel were investigated on a common rail diesel engine. The results indicate that at different engine loads and EGR rates, compared with diesel, the ignition delay of diesel and isopropanol blended fuel prolongs, the peak heat release rate of pre-injection injection increases, the peak heat release rate of main injection slightly decreases, the diffusion combustion intensity significantly increases at medium and high loads, and the peak in-cylinder average temperature increases. In addition, NO_x emission increases slightly, and soot emissions, particle number concentration and volume concentration decrease significantly. Compared with diesel fuel, diesel and isopropanol blended fuel combined with EGR can reduce both NO_x and particulate matter emissions.更多还原