摘要
对不同排气再循环(exhaust gas recirculation,EGR)系统对发动机性能的影响进行仿真分析。结果表明:单路EGR系统缩小涡轮尺寸可以产生较高EGR率,但是油耗较高;单向阀在涡轮尺寸较大时具有较好地提高EGR率的效果;与单EGR冷却器相比,两路EGR系统双EGR冷却器具有提高EGR率的潜力;两路EGR系统+单向阀泵气损失小,EGR效率高且油耗低。
Based on the emission control technology route of EGR, the influence of different EGR systems on engine performance is simulated. The results show that high EGR rate can be achieved from single-way EGR system by decrease in the turbine size, however fuel consumption is added. EGR rate can be increased by the check valve when the turbine size gets larger. The double-way EGR system with double EGR coolers has the similar potential compared with single EGR cooler. Higher EGR rate and lower fuel consumption can be obtained with the double-way EGR system matching the check valve mainly due to the smaller pumping loss.
作者
尹晓军
王波
李志杰
贾德民
王晓艳
YIN Xiaojun;WANG Bo;LI Zhijie;JIA Demin;WANG Xiaoyan(State Key Laboratory of Reliability of Engine, Weifang 261000,China;Weichai Power Co., Ltd., Weifang 261000, China)
出处
《内燃机与动力装置》
2019年第1期80-83,共4页
Internal Combustion Engine & Powerplant
