稀燃汽油机EGR对LNT催化器工作过程影响研究

工程热物理学报 , 2014, 35(7): 1443-1447.

1.天津大学内燃机燃烧学国家重点实验室,天津300072

2.天津大学内燃机燃烧学国家重点实验室,天津300072

3.天津大学内燃机燃烧学国家重点实验室,天津300072

4.天津职业技术师范大学,天津300222

5.天津职业技术师范大学,天津300222

6.天津职业技术师范大学,天津300222

Effect of EGR on LNT Working Process in a Lean-burn Gasoline Engine

先前试验中发现过量EGR对稀燃汽油机LNT的NOx转化率存在一定的恶化现象.以实际发动机排气作为LNT入口边界条件,对不同EGR率,LNT内部NOx吸附、脱附及还原过程进行数值仿真.结果发现,稀燃模式LNT的NOx溢流量随时间推移而增加,在该模式结束前达到稳定.

[1]	Jinyoung Cha;Junhong Kwon;Youngjin Cho;Simsoo Park .The effect of exhaust gas recirculation (EGR) on combustion stability, engine performance and exhaust emissions in a gasoline engine[J].KSME International Journal,2001(10):1442-1450.
[2]	S. Sasaki;D. Sawada;T. Ueda;H. Sami .Effects of EGR on direct injection gasoline engine[J].JSAE review,1998(3):223-228.
[3]	Jae-Soon Choi;William P. Partridge;Josh A. Pihl C. Stuart Daw .Sulfur and temperature effects on the spatial distribution of reactions inside a lean NO_x trap and resulting changes in global performance[J].Catalysis Today,2008(1/2):173-182.
[4]	刘磊,李志军,岳东鹏,张瀛,马小强.稀燃汽油机EGR耦合LNT技术对NOx排放的影响[J].工程热物理学报,2013(10):1978-1981.
[5]	Jose M Lujan;Jose Galindo;Jose R Serrano;Benjamin Pla .A methodology to identify the intake charge cylinder-to-cylinder distribution in turbocharged direct injection Diesel engines[J].Measurement Science & Technology,2008(6):065401-1-065401-11-0.
[6]	Z.-M. Ye;Z.-J. Li .Impact of lean-burn control technology on the fuel economy and NO_x emission of gasoline engines[J].Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering,2010(8):1041-1058.
[7]	刘磊,李志军,岳东鹏,张洪洋,常庆,马小强,林漫群.基于Simulink的稀燃汽油机LNT系统仿真模拟[J].天津大学学报,2013(11):963-968.

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