吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (1): 133-139.doi: 10.13229/j.cnki.jdxbgxb201601020

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Efficiency of DPF on ultrafine particles in a common-rail diesel engine

SUN Wan-chen, LIU Gao, GUO Liang, DU Jia-kun, XIAO Sen-lin, LI Guo-liang   

  1. State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130022,China
  • Received:2014-10-13 Online:2016-01-30 Published:2016-01-30

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Abstract: The particle size distribution characteristics in a common-rail diesel engine with and without catalyzed Diesel Particulate Filter (DPF) under different fuels and operation conditions were studied by experiments. The filtration efficiency of catalyzed DPF for different particle sizes was analyzed. Results show that the exhausted particle concentration distribution curve presents bimodal structure when burning BTL and petroleum diesel with and without DPF. The DPF filtration efficiency is related to engine operation conditions and particle size distribution characteristics that the trapping effect is better for nucleation mode and ultrafine particles. DPF filtration efficiency for ultrafine particles can reach 75% under medium and low loads. As the speed and load increase the efficiency gradually decreases for different modal particles, and as the particle size decreases the efficiency increases. Compared with burning petroleum diesel, the exhausted particles are mainly in nucleation mode when burning BTL. BTL has higher filtration efficiency than petroleum diesel, especially under heavy load condition.

Key words: power machinery and engineering, common-rail diesel engine, diesel particulate filter(DPF), particle size distribution, filtration efficiency

CLC Number: 

  • TK421.5
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