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| Study on Soot Loading and Regeneration Characteristics of Diesel Particulate Filter at Different Altitude Levels |
| DOI：10.13949/j.cnki.nrjgc.2020.03.007 |
| Key Words:diesel engine particle filter altitude levels temperature regeneration |
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| Abstract:In order to study the soot loading law and regeneration characteristics of diesel particulate filter(DPF) at different altitudes, experimental researches were conducted on a high pressure common rail diesel engine at two atmospheric pressures of 80kPa and 100kPa, including the world harmonized transient cycle(WHTC) emissions, DPF soot loading and pressure drop characteristics, and the temperature field and pressure drop characteristics in DPF regeneration. The results show that the DPF exhaust temperature and emissions data in plateau environment are higher than those in plain environment, and the exhaust flow and oxygen concentration are higher in plain environment than those in plateau environment. The pressure drop loss at high altitude increases rapidly at first and then slowly with the accumulation of soot. The regeneration temperature and altitude have influence on the DPF regeneration pressure drop, peak temperature of the carrier regeneration, radial and axial temperature gradients of the carrier regeneration and the regeneration time. The higher the regeneration temperature and the lower the altitude, the higher the DPF pressure drop; the higher the regeneration temperature and altitude, the higher the peak temperature of the carrier regeneration, and the larger the radial and axial temperature gradient of the carrier regeneration; the higher the regeneration temperature and the lower the altitude, the higher the DPF pressure drop when the regeneration takes place. |
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