摘要
通过研究NEDC循环工况下整车的瞬态排放情况,分析了减速断油及怠速停机过程中,氧浓度及温度的变化对催化器转化效率的影响。试验结果表明,减速断油过程中,由于没有燃油喷射,新鲜空气被直接排入排气管,造成排气管内氧浓度的增加,并且,减速断油及怠速停机会造成排气管及催化器温度的降低,造成催化器转化率的下降,使发动机再次起动后排放恶化。
The influence of oxygen concentration and temperature on the conversion efficiency of catalytic converter was analyzed by examing the transient emission in NEDC（new European driving cycle）. The results show that the emission of HEV was worse than that of conventional vehicles when restarting the engine since the conversion efficiency of catalytic converter reduces due to increase of oxygen concentration and decrease of catalyst temperature during the DFCO（deceleration fuel out off） process and autostop
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2008年第2期15-18,共4页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
混合动力
瞬态排放
催化器
转化效率
IC engine
HEV
transient emission
catalytic converter
conversion efficiency
作者简介
梁海波（1980-）,男,博士,主要研究方向为混合动力排放．E-mail：liang_hb@126．com。
