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| Experimental Study on Particle Trapping Characteristics of Diesel Particulate Filter |
| DOI：10.13949/j.cnki.nrjgc.2019.06.004 |
| Key Words:diesel particulate filter（DPF） partulate matter particle size trapping |
| Author Name | Affiliation | | SHI Yunxi,CAI Yixi,ZHU Lei,CHEN Yi,ZHAO Chuang,WANG Weikai | 1.School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
2.Kailong High Technology Co., Ltd., Wuxi 214177, China |
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| Abstract:An on-line particle trapping test was carried out with a diesel particulate filter(DPF). The trapping characteristics of the DPF for different particle size were analyzed by using an exhaust particle size spectrometer. The stacking morphology and oxidation characteristics of the particles at the front and rear ends of the DPF were investigated by scanning electron microscope and thermo gravimetric analyzer. Results show that the DPF captures large size particles better than small size particles, and can almost completely intercept accumulation mode particles. Since the soot on the filter wall reduces the filter pore size, the trapping efficiency of the DPF increases with the rise of sampling time, with only a small amount of nucleation mode particles leaked off. Use of the DPF can lead to an increase in the content of volatile components coupled to the reduction of elemental carbon content, and eventually promotes the enhanced oxidation activity downstream of its outlet. |
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