Journal
APPLIED THERMAL ENGINEERING
Volume 141, Issue -, Pages 976-980Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2018.06.056
Keywords
Diesel particulate filter; Active regeneration; Drop to idle; Diesel engine
Funding
- National Key Research and Development Program [2017YFC0211304, 2016YFD0700705]
- Innovation Plan of Agricultural Machinery Equipment Research and Development in Shandong Province [2016YF003]
- National Engineering Laboratory for Mobile Source Emission Control Technology [NELMS2017A09]
- Natural Science Foundation of Shandong Province [ZR2015EM051]
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The idle-up strategy of diesel particulate filter (DPF) regeneration during a drop to the idle (DTI) process was investigated in this study. This strategy could control the peak temperature and maximum temperature gradient of a cordierite ceramic filter. Experimental results showed that as the engine working condition dropped to idle speed during regeneration with a DPF soot load of 4 g/L, the peak temperature was reduced from 820 degrees C to 632 degrees C when the idle speed was increased to 1100 r/min, a decrease of 22.9%, while the maximum temperature gradient was reduced from 30 degrees C/cm to 10 degrees C/cm, a decrease of 66.7%. The peak temperature and temperature gradient of the DPF cordierite ceramic filterwith DTI during regeneration were effectively reduced. The idle speed range for the idle-up strategy to decrease the peak temperature and temperature gradient of a cordierite ceramic filter was discussed. The maximum idle speed of the idle-up strategy should not be higher than the speed of common engine working conditions in order to avoid DTI during a regeneration increase at current engine driving speed.
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