摘要
选取一台符合国六排放标准的重型柴油发动机,在全流稀释排放系统台架上进行了5次世界统一稳态循环(World Harmonised Steady State Cycle,WHSC)和世界统一瞬态循环(World Harmonised Transient Cycle,WHTC)的冷热态测试,并分别对排放颗粒物和细颗粒物数量进行了测量。通过对颗粒物与细颗粒物数量比排放的不确定度来源和影响因素进行分析,结合相关理论,建立了数学模型以评定各影响因素的不确定度。通过计算,得到了颗粒物与细颗粒物数量比排放的合成相对标准不确定度,并对这两者进行了对比分析,最终计算出了扩展不确定度。
A heavy-duty diesel engine compliant with China VI emission standards was selected for a series of cold and hot state tests on a full-flow dilution emissions system bench.The engine underwent 5 repetitions of WHSC and WHTC,during which emissions of particulate matter and fine particulate matter were quantified.By analyzing the sources and influencing factors of uncertainty in the ratio of particulate matter to fine particulate matter emissions,and incorporating relevant theories,a mathematical model was established to assess the uncertainty associated with each influencing factor.Through calculations,the composite relative standard uncertainty of particulate matter to fine particulate matter emissions was determined,followed by a comparative analysis of the two.Ultimately,the expanded uncertainty was calculated.
作者
刘康
李娜
郭亚辰
闫鹏勇
吴春玲
LIU Kang;LI Na;GUO Yachen;YAN Pengyong;WU Chunling(CATARC Automotive Test Center(Tianjin)Co.,Ltd.,Tianjin 300300,China)
出处
《内燃机》
2023年第4期1-8,共8页
Internal Combustion Engines
基金
国家重点研发计划(2022YFC3703600)。
关键词
细颗粒物数量
不确定度评定
影响因素
国六排放
数学模型
fine particulate number
uncertainty evaluation
influence factor
ChinaⅥemission
mathematical model
