1. 吉林大学汽车仿真与控制国家重点实验室,长春,130022
2. 博世汽车柴油系统有限公司,江苏,无锡,214000
网络首发:2018-03-10,
纸质出版:2018
移动端阅览
韩晓梅 1, 2, 田威 2, 等. 废气再循环瞬态修正控制策略对重型柴油机排放性能的影响[J]. 西安交通大学学报, 2018,52(3):41-46.
Influence of EGR Transient Correction Strategy on Emission Performance of Heavy Duty Diesel Engine[J]. 2018, 52(3): 41-46.
韩晓梅 1, 2, 田威 2, 等. 废气再循环瞬态修正控制策略对重型柴油机排放性能的影响[J]. 西安交通大学学报, 2018,52(3):41-46. DOI: 10.7652/xjtuxb201803006.
Influence of EGR Transient Correction Strategy on Emission Performance of Heavy Duty Diesel Engine[J]. 2018, 52(3): 41-46. DOI: 10.7652/xjtuxb201803006.
针对重型柴油机瞬态工况(特指恒定转速、转矩瞬增工况)空气系统响应迟滞造成的排放恶化问题
设计了废气再循环(EGR)瞬态修正控制策略
从EGR阀预控制和瞬态需求空气量两方面进行EGR瞬态修正:当判定发动机处于瞬态工况时
将EGR阀预控制开度设定为0
加快EGR阀关闭速度; 依据瞬态程度修正需求空气量
使实际进气量更早满足需求空气量
实现EGR阀适时开启。试验结果表明:经过EGR瞬态修正
改善了瞬态工况排放恶化、发动机动力性响应不及时等问题; 在WHTC(world harmonized transient cycle)瞬态循环中加入EGR瞬态修正后
氮氧化物(NO
x
)排放降低了4.7%
碳烟排放降低了46.4%
碳氢化合物和一氧化碳排放分别降低了8.5%和30.3%
但二氧化碳排放增加了0.3%
油耗增大了0.6%。EGR瞬态修正控制策略虽然牺牲了0.6%的油耗
但是显著改善了NO
x
、碳烟、碳氢化合物和一氧化碳等有害气体的排放
因此可为重型柴油发动机排放性能的改善提供借鉴。
Aiming at solving the emission deterioration of diesel engine under transient working conditions caused by delayed response of air system
an exhaust gas recirculation(EGR)transient correction strategy is developed. EGR valve pre-control and desired air mass are both corrected under the transient correction strategy. The EGR valve pre-control value is set to zero when the engine is at a transient working condition to accelerate the closing of EGR valve. Meanwhile
the desired air mass is modified according to the transient level of engine by making the EGR valve open at reasonable time. With the EGR transient correction control
engine emissions and drivability under transient working condition are improved. Test results show that reductions of 4.7% NO
x
46.4% soot
8.5% HC and 30.3% CO
but increase of 0.6% fuel consumption
are obtained. Considering the obvious emissions improvement
the tiny fuel consumption increase can be ignored. It can be concluded that the proposed EGR transient correction strategy is effective for diesel engine performance improvement.
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刘军恒,孙平,刘源,等.掺混比对高压共轨柴油机颗粒物物理特性的影响.2017,51(12):104-111.[doi:10.7652/xjtuxb 201712016]
袁超,洪伟,苏岩,等.直喷汽油机起动过程多环芳烃排放的研究.2017,51(9):54-62.[doi:10.7652/xjtuxb201709008]
刘世宇,李志军,史春涛,等.CO2和水蒸气对稀燃NO化器的影响.2017,51(5):134-141.[doi:10.7652/xjtuxb 201705019]
谢萌,马志杰,王全红,等.聚甲氧基二甲醚及其高比例掺混柴油混合燃料发动机燃烧与排放的试验研究.2017,51(3):32-37.[doi:10.7652/xjtuxb201703006]
汪映,黄智勇,柯希春,等.液化石油气对二甲醚-柴油双燃料发动机燃烧和排放特性的影响.2016,50(5):19-23.[doi:10.7652/xjtuxb201605003]
瞿磊,王忠,李瑞娜,等.甲醇/生物柴油燃烧颗粒的结构特征研究.2016,50(5):81-86.[doi:10.7652/xjtuxb201605012]
麻斌,董伟,高莹,等.稀燃条件下废气再循环对缸内直喷汽油机微粒排放粒径分布的影响.2016,50(5):87-94.[doi:10.7652/xjtuxb201605013]
钟兵,洪伟,苏岩,等.控制参数对增压缸内直喷汽油机部分负荷下微粒排放特性的影响.2016,50(5):95-100.[doi:10.7652/xjtuxb201605014]
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