| 姚 塽,汪侃,张许扬,等.汽油机颗粒捕集器再生平衡状态的仿真研究[J].内燃机工程,2021,42(3):93-99. |
| Simulation Study on the Regeneration Equilibrium State of the Gasoline Particulate Filters |
| DOI：10.13949/j.cnki.nrjgc.2021.03.014 |
| Key Words:gasoline particulate filter regeneration equilibrium state pressure drop particle |
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| Abstract:A numerical model of the direct injection gasoline engine particulate filter (GPF) was established using the numerical simulation software AVL-FIRE, and the model was verified based on relevant experimental data. The effects of exhaust parameters including exhaust oxygen concentration，NO concentration and exhaust temperature on the GPF regeneration equilibrium state are analyzed through calculating the pressure drop and carbon load of the GPF under different exhaust parameters. The results showed that: The higher oxygen concentration is beneficial for reaching the regeneration equilibrium state. With the exhaust temperature of 800K, GPF can’t reach the regeneration equilibrium when the oxygen mass concentration is 2%, and GPF can reach the regeneration equilibrium state when the oxygen mass concentration is increased from 2% to 7%. NO mass concentration has a great impact on the pressure drop of GPF. With the exhaust temperature of 800K and the oxygen mass concentration of 7%, the pressure drop in the regeneration equilibrium state decreased by 11.6% as the exhaust NO mass concentration is increased from 0.0% to 0.2%. The higher temperature is helpful to reach the regeneration equilibrium state for GPF. At the oxygen mass concentration of 2%, GPF can reach the regeneration equilibrium state when the exhaust temperature is increased from 800K to 1000K. |
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