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| Influence of Ash Distribution Coefficient on Diesel Engine Performance |
| DOI：10.13949/j.cnki.nrjgc.2021.01.003 |
| Key Words:diesel engine system thermal efficiency ash diesel particulate filter（DPF） performance |
| Author Name | Affiliation | | L Yu,SHEN Yinggang,LI Qing,CHEN Guisheng,LU Shenke | 1.Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming 650500, China
2.Yunnan Filter Environment Protection S.&T. Co., Ltd., Kunming 650300, China |
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| Abstract:By constructing an one-dimensional thermodynamic simulation model of diesel engine coupled with diesel particle filter (DPF), the effect of ash distribution coefficient on the performance of diesel engine was studied, focusing on the influence of ash distribution coefficient on the thermal efficiency of the diesel engine system. The results show that when the soot loading is 6g/L and the ash loading is 33g/L, the DPF pressure drop and filtration efficiency increase with the increase of the ash distribution coefficient. When the ash distribution coefficient increases, the diesel torque, the maximum pressure in the cylinder, and the NOx emissions decline, and the soot emissions increase. When the ash distribution coefficient increases, the engine brake specific fuel consumption and DPF regeneration frequency increase, and the engine thermal system efficiency that contains both diesel thermal efficiency and DPF regeneration efficiency decreases. Relying solely on the DPF pressure drop to determine the start of active regeneration have a large error, and the error increases with the increase of the ash loading. |
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