基于不同EGR系统的发动机性能仿真研究
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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.
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.
引文
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[11]张焕岩,周菲菲,肖海云,等.柴油机电控EGR控制技术[J].内燃机与配件,2018(11):18-19.
[12]董天普,张付军,刘波澜,等.EGR对涡轮增压器瞬态特性的影响[J].内燃机学报,2017,35(2):118-124.
[13]孙柯,李思远,杨滨,等.EGR对汽柴油双燃料均质引燃影响的试验探究[J].内燃机与动力装置,2016,33(3):1-5.
[14]吕志华,张英,张朝阳,等.轨压和EGR率对柴油机性能的影响[J].内燃机与动力装置,2018,35(3):45-48.
[15]马义,乔锦阳,李俊,等.国VI天然气发动机的EGR均匀性研究[J].内燃机,2018(2):33-36.
[2]李科,孟令军,赵文辅,等.VGT对高压共轨EGR柴油机性能影响的试验研究[J].内燃机与动力装置,2017,34(5):9-12.
[3]张文强.复合EGR与可调两级增压系统对柴油机性能和排放影响的试验研究[D].天津:天津大学,2012.
[4]陈贵胜,沈颖刚,郑尊清,等.采用EGR的重型柴油机低俗高负荷性能与排放特性[J].内燃机学报,2014,32(2):97-103.
[5]彭有荣,黄柳升,范永鹏.EGR系统对某汽油机排放及油耗影响的研究[J].时代汽车,2018(7):35-37.
[6]李子非,王鹏,孙爱洲,等.高低压回路EGR对柴油机燃烧过程影响的试验研究[J].现代车用动力,2018(1):35-38.
[7]祖象欢,王银燕,杨传雷,等.增压柴油机EGR性能评估研究与实现[J].系统仿真学报,2017,29(12):3075-3081.
[8]李林剑,胡志龙,崔毅,等.米勒循环结合EGR的可调两级增压柴油机性能研究[J].柴油机,2017,39(6):1-5.
[9]陈园明,王宏大,王次安.某型柴油机EGR率优化仿真分析[J].汽车使用技术,2016(8):104-106.
[10]张英.EGR技术在国IV柴油机上的应用开发[D].长春:吉林大学,2016.
[11]张焕岩,周菲菲,肖海云,等.柴油机电控EGR控制技术[J].内燃机与配件,2018(11):18-19.
[12]董天普,张付军,刘波澜,等.EGR对涡轮增压器瞬态特性的影响[J].内燃机学报,2017,35(2):118-124.
[13]孙柯,李思远,杨滨,等.EGR对汽柴油双燃料均质引燃影响的试验探究[J].内燃机与动力装置,2016,33(3):1-5.
[14]吕志华,张英,张朝阳,等.轨压和EGR率对柴油机性能的影响[J].内燃机与动力装置,2018,35(3):45-48.
[15]马义,乔锦阳,李俊,等.国VI天然气发动机的EGR均匀性研究[J].内燃机,2018(2):33-36.