摘要
重型柴油车污染物排放限值及测量方法GB 17691—2018中对于重型商用柴油车提出了车载诊断系统(OBD)实际监测频率(IUPR)的监测要求,属于同一OBD系族的不同厂家、不同车型、不同里程的IUPR率要满足法规要求。研究表明发动机排气温度、废气体积流量和废气质量流量是影响OBD诊断释放的关键因素。文章通过正交试验的方法,分析不同厂家整车匹配的背压、进气阻力与中冷压降的边界对排温、废气体积流量以及废气质量流量的影响,识别影响权重及规律,探索整车匹配关键技术指标,对后续的整车匹配提供标准。
Emission limits for heavy diesel vehicles and measurement methods GB 17691-2018 set out the monitoring requirements for on-board diagnostic's(OBD)in-use performance ratio(IUPR)for heavy commercial diesel vehicles.The IUPR rates for different manufacturers,models and mileage belonging to the same OBD family are required to meet the regulatory requirements.The results show that engine exhaust temperature,exhaust volume flow rate and exhaust mass flow rate are the key factors affecting the diagnostic release of OBD.Through the method of orthogonal test,this paper analyzes the influence of the boundary between the back pressure,intake resistance and middle cold pressure drop of different manufacturers on exhaust temperature,volume flow of exhaust gas and mass flow of exhaust gas,identifies the influence weight and rule,explores the key technical indicators of vehicle matching,and provides standards for the subsequent vehicle matching.
作者
刘波
黄鹏
王素梅
孙文强
孙选建
刘玉伟
杨永春
LIU Bo;HUANG Peng;WANG Sumei;SUN Wenqiang;SUN Xuanjian;LIU Yuwei;YANG Yongchun(Weichai Power Company Limited,Weifang 261000,China)
出处
《汽车实用技术》
2023年第11期164-168,共5页
Automobile Applied Technology
关键词
IUPR
排气温度
废气体积流量
废气质量流量
IUPR
Exhaust temperature
Exhaust gas volume flow rate
Exhaust gas mass flow rate
