高原环境下轻型汽油车NH_(3)和PN排放特性研究  

NH_(3)and PN Emission Characteristics of Light-Duty Gasoline Vehicles in Plateau Environment

作　　者：王计广 顾王文 李加强[2] 彭鹄[3] 雷基林[4] 朱云波 WANG Jiguang;GU Wangwen;LI Jiaqiang;PENG Hu;LEI Jilin;ZHU Yunbo(CATARC Automotive Test Center(Kunming)Co.,Ltd.,Kunming 651700,China;Southwest Forestry University,Kunming 650224,China;Kunming Yunnei Power Co.,Ltd.,Kunming 650200,China;Kunming University of Science and Technology,Kunming 650500,China;Yunnan Provincial Institute of Traffic Science and Technology Co.,Ltd.,Kunming 650200,China)

机构地区：[1]中汽研汽车检验中心(昆明)有限公司,云南昆明651700 [2]西南林业大学,云南昆明650224 [3]昆明云内动力股份有限公司,云南昆明650200 [4]昆明理工大学,云南昆明650500 [5]云南省交通科学研究院有限公司,云南昆明650200

出　　处：《车用发动机》2024年第6期52-59,共8页Vehicle Engine

基　　金：国家重点研发计划课题(2023YFC3705405-1)。

摘　　要：选取10辆国六b阶段排放标准的不同动力类型轻型汽油车(插电式混合动力和传统单一汽油发动机),在昆明海拔1914 m的高原轻型整车环境模拟排放实验室开展常温和低温环境下WLTC循环排放测试,研究分析高原环境下轻型汽油车NH_(3)和PN(PN_(10)和PN_(23))排放特性及影响因素。结果发现,尾气经TWC后NH_(3)排放大幅增加,高原环境下国六b阶段不同类型轻型汽油车排放因子达到21.80~485.10 mg/km,显著高于《大气氨源排放清单编制技术指南》中轻型汽油车氨排放因子26 mg/km。插电式混合动力和传统汽油发动机的轻型汽油车NH_(3)排放主要集中在低速段和中速段,低温环境下NH_(3)排放更高。与PN_(23)排放相比,插电式混合动力汽车和传统动力轻型汽油车PN_(10)排放分别增加21.11%~50.21%和12.00%~38.47%。低温环境下PN_(10)和PN_(23)排放速率峰值分别为6.12×10^(11)个/s和5.28×10^(11)个/s,高出常温环境下相应PN排放速率约2个数量级。Ten light-duty gasoline vehicles meeting ChinaⅥphase b emission standards with different power types(plug-in hybrid and conventional gasoline engine)were selected to carry out WLTC cycle emission tests under normal and low temperature conditions in the light-duty vehicle environment-simulated emission laboratory at an altitude of 1914 m in Kunming.The emission characteristics and influencing factors of NH_(3)and PN(PN_(10)and PN_(23))from light-duty gasoline vehicles were studied in plateau environment.The results showed that the NH_(3)emission of exhaust gas increased significantly after TWC,and the emission factor for different types of ChinaⅥphase b light-duty gasoline vehicles under plateau environment reached 21.80-485.10 mg/km,which was significantly higher than the 26 mg/km NH_(3)emission factor of light-duty gasoline vehicles as stated in the Technical Guideline for Preparing the Ammonia Emission Inventory.The NH_(3)emission of light-duty gasoline vehicles with plug-in hybrid and conventional gasoline engines is mainly concentrated in the low speed and medium speed segments,and the NH_(3)emission was higher in low temperature environment.Compared with PN_(23)emission,PN_(10)emission of plug-in hybrid electric vehicles and conventional power light-duty gasoline vehicles increased by 21.11%-50.21%and 12.00%-38.47%respectively.At low temperature,the peak emission rates of PN_(10)and PN_(23)were 6.12×10^(11)#/s and 5.28×10^(11)#/s,which were about 2 orders of magnitude higher than the corresponding PN emission rates at normal temperature.

关 键 词：高原环境 轻型汽油车 氨 颗粒 排放特性 

分 类 号：TK411.5[动力工程及工程热物理—动力机械及工程]