Ultrafine particle emission characteristics of diesel engine by on-board and test bench measurement

作     者：Cheng Huang Diming Lou Zhiyuan Hu Piqiang Tai Di Yao Wei Hu Peng Li Jin Ren Changhong Chen 

作者机构：School of Automobile StudiesTongji UniversityShanghai 201804China Shanghai Academy of Environmental SciencesShanghai 200233China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第11期

页      面：1972-1978页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080703[工学-动力机械及工程] 07[理学] 08[工学] 070205[理学-凝聚态物理] 0807[工学-动力工程及工程热物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported the Instantaneous Emission and Environmental Impact study on Vehicle Alternative Fuel(No.10231201902) the Project of Study and Demonstration of Real Time On-Road Vehicle Emission and Pollution Warning (No.10231201700) from the Shanghai Science and Technology Commission 

主　　题：ultrafine particle emission emission factor diesel engine on-board emission measurement TSI EEPS 

摘      要：This study investigated the emission characteristics of *** particles based on test bench and on-board measurements. The bench test results showed the ultrafine particle number concentration of the diesel engine to be in the range of （0.56-8.35）×10^8 cm^-3. The on-board measurement results illustrated that the ultra_fine particles were strongly correlated with changes in real-world driving cycles. The particle number concentration was down to 2.0 ×10^6 cm^-3 and 2.7 ×10^7 cm^-3 under decelerating and idling operations and as high as 5.0×10^8 cm^-3 under accelerating operation. It was also indicated that the particle number measured by the two methods increased with the growth of engine load at each engine speed in both cases. The particle number presented a ＂U＂ shaped distribution with changing speed at high engine load conditions, which implies that the particle number will reach its lowest level at medium engine speeds. The particle sizes of both measurements showed single mode distributions. The peak of particle size was located at about 50-80 nm in the accumulation mode particle range. Nucleation mode particles will significantly increase at low engine load operations like idling and decelerating caused by the high concentration of unburned organic compounds.