欢迎访问《环境科学学报》编辑部网站！

快速检索			高级检索

研究论文

唐荣志,谭瑞,王辉,宋锴,刘珂凡,俞颖,沈睿哲,张文彬,张周,帅石金,郭松.缸内直喷汽油车颗粒物排放特征及影响因素[J].环境科学学报,2020,40(3):846-853

Physical and chemical characterization of particle emissions from gasoline direct injection vehicle and its influencing factors

基金项目：国家自然科学基金项目（No.51636003，41977179，21677002，91844301）；国家重点研发计划（No.2016YFC0202000，2017YFC0213000）；多相复杂系统国家重点实验室开放课题（No.MPCS-2019-D-09）

郭松
1. 环境模拟与污染控制国家联合重点实验室, 北京大学环境科学与工程学院, 北京 100871;2. 江苏省大气环境与装备技术协同创新中心, 南京信息工程大学, 南京 210044

摘要：随着经济的发展，机动车排放已成为大气颗粒物的重要来源，能够影响人类健康和气候变化.本研究通过整车转鼓实验对国V缸内直喷（GDI）汽油车的颗粒物排放水平及化学组成进行了研究，并探究了汽油车颗粒物排放的影响因素.研究结果表明，我国GDI汽油车的PM、OC、EC排放因子分别为（43.4±16.2）、（11.0±3.5）及（20.5±8.1）mg·kg^-1，其中EC的排放显著高于同类研究.为探索导致颗粒物排放区别的影响因素，本研究探讨了燃油类型、启动方式和循环设定对汽油车颗粒物排放的影响.结果表明，燃油类型（添加体积分数10%的乙醇与纯汽油）对颗粒物排放影响不大.冷启动会排放更多的颗粒物.同时，循环方式也会影响颗粒物排放，中国工况循环（CLTC）会排放比全球测试循环（WLTC）更多的颗粒物，这可能与我国更多的缓加速情况相关.

Abstract：With the rapid development of economics, vehicular emissions have become negligible source of atmospheric particulates, which can greatly influence human health and climate change. In this study, we performed dynamometer experiments to investigate emission characteristics and compositions of particulate matter from an on-road China V gasoline vehicle. Results shows that the PM, OC and EC emission factors for tested vehicle are(43.4±16.2)、(11.0±3.5)及(20.5±8.1) mg·kg^-1,in which EC was significantly higher than previous studies. In order to study the factors that may have an influence on the particulate emission, we perform different experiments using different fuel composition, starting mode and operating conditions. Fuel type has little impact on PM EF. Cold-start emits more PM than hot-start operation. Cycle condition will also affect the PM emission while Chinese light-duty vehicle Test Cycle (CLTC) emits more PM than Worldwide World-wide harmonized Light duty Test Cycle (WLTC),which might be related to the more frequent moderate acceleration rate condition in China.

Key words：gasoline direct injection vehicle PM emission characterization influencing factors