米勒循环柴油机性能优化计算分析  

Performance optimization and analysis of Miller cycle diesel engine

作　　者：郭政政 薛冬新[1] 芦宁 GUO Zhengzheng;XUE Dongxin;LU Ning(Institute of Internal Combustion Engine,Dalian University of Technology,Dalian 116023,Liaoning,China;CNR(Dalian)Diesel Engine Co.,Ltd.,Dalian 116021,Liaoning,China)

机构地区：[1]大连理工大学内燃机研究所,辽宁省大连市116023 [2]大连中车柴油机有限公司,辽宁省大连市116021

出　　处：《农业装备与车辆工程》2023年第3期80-84,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：基于GT-Power软件对12V26型柴油机进行仿真模拟。通过与实验数据的比对,验证了模型的可靠性。分析不同进气门关闭角度对柴油机性能参数与排放的影响。结果表明:采用米勒循环使压缩终点压力温度有效降低。再重新匹配压缩比以补充米勒循环造成的进气损失,重新匹配喷油正时角度以优化燃烧,降低Soot排放。在采用米勒循环M40的基础上重新匹配最佳增压比16.5和最佳喷油正时角-16℃A时,可保证与原机功率相同,油耗降低12.84 g/(kW·h),NOX减排22.08%,Soot减排57.2%。The simulation is based on the GT-POWER software model of 12V26 diesel engine.Verify the reliability of the model by comparing the experimental data,and analyze different IVC angle on engine performance parameters and emissions.The results show that Miller cycle can effectively reduce the end pressure and temperature of compression.Rematch the compression ratio to supplement the intake air loss caused by Miller cycle,and adjust the injection timing angle to optimize combustion and reduce soot emission.When the optimal boost ratio of 16.5 and the optimal injection timing angle of -16℃A are rematched on the basis of Miller cycle M40,it can ensure the same power as the original engine,reduce fuel consumption by 12.84 g/(kW·h),reduce NOx emission by 22.08% and soot emission by 57.2%.

关 键 词：柴油机 米勒循环 压缩比 喷油正时角 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]