张广西^1，2,史玉梅^1,2,周文彦^1，2,杨豫魁^1，2

1.内燃机可靠性国家重点实验室，山东 潍坊 261061；2.潍柴动力股份有限公司，山东 潍坊 261061

摘要：对某款4缸轻型柴油机电动压气机对发动机性能的影响进行仿真分析，研究电动压气机对发动机瞬态工况改善情况。匹配研究表明：电动压气机布置在压气机出口，与普通增压器串联，能够有效改善发动机某些工况的动力性和瞬态响应特性，发动机转速越低，改善效果越明显。转速为1300 r/min时，扭矩提升7.23%，定速加负荷工况的加速时间从16.7 s缩短至6.7 s，减少了60%；转速为1400 r/min时，扭矩提升6.52%，定速加负荷工况的加速时间从16.1 s缩短至7.1 s，减少了56%。

关键词：电动压气机；性能；瞬态响应特性；净功率

Abstract: Basing on a certain type of 4-cylinder light-duty diesel engine, the influence of electric compressor on engine performance is simulated and analyzed, meanwhile, the transient working condition improvement by electric compressor is also studied. The research shows that the electric compressor arranged at the outlet of the compressor, parallel with turbocharger, could effectively improve the dynamic performance and transient response characteristics of the engine under certain conditions. The lower the engine speed, the higher the improvement. For instance, at the speed of 1300r/min, the torque could be increased by 7.23%, under constant speed loading conditions, the maximum acceleration time can be reduced from 16.7s to 6.7s, and reduces by 60%. At the speed of 1400r/min, the torque could be increased by 6.52%, under constant speed loading conditions, the maximum acceleration time can be reduced from 16.1s to 7.1s, and reduces by 56%.

Key words: electric compressor; performance; transient response characteristics; net power