摘要
利用PEMS对6辆典型国六重型柴油车开展实际道路排放测试,基于功基窗口法(中国和欧盟)、NTE法(美国EPA)和3B-MAW法(美国CARB)研究了重型柴油车实际道路NO_(x)排放特性,探讨了不同分析方法的特点及适用性。结果表明:基于功基窗口法的NO_(x)排放结果符合中国和欧盟的监管要求,但基于NTE法和3B-MAW法的NO_(x)排放合规性具有不确定性。NO_(x)排放数据利用率低导致NTE法无法有效分析实际道路NO_(x)排放,3B-MAW法对NO_(x)排放分类管理值得借鉴。冷起动NO_(x)排放占PEMS试验的47.3%~80.7%,重型柴油车冷起动NO_(x)排放应被重视。然而目前中国、欧盟和美国的重型车实际道路NO_(x)排放分析方法均无法有效评估冷起动NO_(x)排放。因此,下阶段排放法规对冷起动NO_(x)排放的监管应当提出相应测试循环、分析方法和排放限值,切实降低重型柴油车NO_(x)实际排放。
PEMS is used to conduct the real-world emission tests on six typical China-VI diesel vehicles.Based on the work-based MAW(China and the EU),NTE method(U.S.EPA)and 3B-MAW method(U.S.CARB),the real-world NO_(x) emission characteristics of heavy diesel vehicles are studied,and the characteristics and applicability of different analysis methods are discussed.The results show that the NO_(x) emission results based on the work-based MAW method can meet the regulatory requirements of China and the EU,but the NO_(x) emission compliance based on the NTE method and 3B-MAW method is uncertain.The low utilization of NO_(x) emission data leads to the inability of NTE method to effectively analyze the real-world NO_(x) emission characteristics.And the 3BMAW method is worthy of reference for NO_(x) emission classification management.Cold-start NO_(x) emission accounts for 47.3%-80.7%of the PEMS test,and the cold-start NO_(x) emission of heavy-duty diesel vehicles should be paid at⁃tention to.However,the current real-world NO_(x) emission analysis methods for heavy-duty vehicles in China,the EU and U.S.are unable to effectively evaluate cold-start NO_(x) emission.Therefore,the supervision of cold-start NO_(x) emission in the next stage of emission regulations should put forward the specific test cycle,analysis methods and emission limit,to effectively reduce the actual NO_(x) emission of heavy diesel vehicles.
作者
吕立群
徐龙
尹航
杨杨
葛蕴珊
Lyu Liqun;Xu Long;Yin Hang;Yang Yang;Ge Yunshan(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081;Emission Regulation Office,Weichai Power Co.,Ltd.,Weifang 261061;Vehicle Emission Control Center,Chinese Research Academy of Environmental Sciences,Beijing 100021)
出处
《汽车工程》
EI
CSCD
北大核心
2024年第1期151-160,共10页
Automotive Engineering
基金
国家自然科学基金(52272342)
国家重点研发计划(2022YFC3701802)资助。
