基于LLC循环的重型车冷启动排放特征研究  

Research on Emission Characteristics of Heavy Duty Vehicles under Cold Starting-up Based on LLC Cycle

作　　者：张朋 夏坤 刘志伟 邸少伟 高加祥 Zhang Peng;Xia Kun;Liu Zhi-wei;Di Shao-wei;Gao Jia-xiang(CATARC Automotive Test Center(Tianjin)Co.,Ltd.,Tianjin 300300,China;Nanjin Iveco Automobile Co.,Ltd.,Jiangsu Nanjing 211806)

机构地区：[1]中汽研汽车检验中心(天津)有限公司,天津300300 [2]南京依维柯汽车有限公司,江苏南京211806

出　　处：《内燃机与配件》2025年第6期19-21,共3页Internal Combustion Engine & Parts

摘　　要：本文基于低负荷循环(Low-load Cycle,LLC),对重型车冷启动及热车启动两种启动方式下的二氧化碳(CO_(2))、一氧化碳(CO)、氮氧化物(NO_(x))的排放特征进行了试验研究。结果表明,冷启动将一定程度上增加CO_(2)的排放,这种影响主要作用于车辆状态差距较大的前1500 s;冷启动对于整个LLC循环下的CO排放有降低作用,这种降低作用主要体现在1500 s之后的时间段内,相反,在冷启动作用阶段(前1500 s)会增加CO的排放;冷启动将大大增加NO_(x)排放,这种情况存在于整个LLC循环中,在前1500 s这种增加趋势更大。This study is based on the Low load Cycle(LLC)and conducts experimental research on the emission characteristics of carbon dioxide(CO_(2)),carbon monoxide(CO),and nitrogen oxides(NO_(x))under cold starting-up and hot starting-up of heavy-duty vehicles.The results indicated that cold starting-up will increase CO_(2)emissions to a certain extent,and this effect mainly affects the first 1500 seconds when there is a significant difference in vehicle status;It has a reducing effect on CO emissions throughout the LLC cycle,which mainly applies to the first 1500 seconds when there is a significant difference in vehicle status,but during the cold starting-up phase(first 1500 s),CO emissions will increase;Cold starting-up will significantly increase NO_(x)emissions,which exists throughout the entire LLC cycle and shows a greater trend in the first 1500 seconds.

关 键 词：低负荷循环 重型车 排放污染物 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]