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

查看全文 作　　者：Cheng [1,2]Huang;Diming [1]Lou;Zhiyuan [1]Hu;Piqiang [1]Tai;Di [1]Yao;Wei [1]Hu;Peng [1]Li;Jin [1]Ren;Changhong [2]Chen

机构地区：[1]School of Automobile Studies,Tongji University,Shanghai 201804,China;[2]Shanghai Academy of Environmental Sciences,Shanghai 200233,China

出　　处：《Journal of Environmental Sciences》索引2012年第24卷第11期,共7页

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 摘　　要：This study investigated the emission characteristics of ultrafine 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 8cm-3. The on-board measurement results illustrated that the ultrafine particles were strongly correlated with changes in real-world driving cycles. The particle number concentration was down to 2.0×106cm-3 and 2.7×107cm-3 under decelerating and idling operations and as high as 5.0×108cm-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 50-80nm 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. 关键词：超细颗粒性能测试排放特性主板柴油机粒子数浓度柴油发动机负载条件

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

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