| 黄粉莲,王永佳,万明定,等.甲醇/柴油双燃料发动机催化型颗粒捕集器主动再生特性研究[J].内燃机工程,2025,46(2):72-81. |
| 甲醇/柴油双燃料发动机催化型颗粒捕集器主动再生特性研究 |
| Study on the Active Regeneration Characteristics of Catalytic Diesel Particulate Filter in a Methanol/Diesel Dual Fuel Engine |
| DOI：10.13949/j.cnki.nrjgc.2025.02.009 |
| 关键词:催化型柴油机颗粒捕集器 甲醇替代率 再生目标温度 初始炭载量 主动再生 |
| Key Words:catalytic diesel particulate filter（CDPF） methanol substitution rate regeneration target temperature initial soot load active regeneration |
| 基金项目:云南省基础研究计划项目（202301AT070435）；兴滇英才支持计划项目 |
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| 摘要:基于GT-Power构建了甲醇/柴油双燃料发动机匹配后处理系统的仿真模型，系统研究了不同甲醇替代率、再生目标温度和初始炭载量对双燃料发动机催化型颗粒捕集器（catalytic diesel particulate filter， CDPF）主动再生时压降特性、温度特性、完全再生持续时间及累计柴油消耗量的影响规律。结果表明：再生目标温度、甲醇替代率和初始炭载量均对CDPF主动再生具有显著影响。随着再生目标温度升高，CDPF压降下降速率加快，较高的再生目标温度易导致CDPF内出现温度值“尖峰”现象，650 ℃再生时CDPF峰值温度较目标温度高85 ℃。随甲醇替代率增加，再生过程压降略微增加，载体峰值温度降低。随初始炭载量增加，CDPF主动再生反应速率加快，载体峰值温度升高，CDPF压降下降速率增大，载体内部温度的均匀性提高。提高再生目标温度可缩短完全再生持续时间，减少累计柴油消耗量。甲醇替代率对完全再生持续时间的影响较小，甲醇替代率从0%增至30%，累计柴油消耗量减少27.8%。600 ℃再生目标温度、30%甲醇替代率、20 g初始炭载量条件下可实现高效安全再生的同时降低再生能耗。 |
| Abstract:A simulation model of a methanol/diesel dual fuel engine with diesel oxidation catalyst （DOC） and catalytic diesel particulate filter （CDPF） was established based on GT-Power. The effects of different methanol substitution rates， regeneration target temperatures and initial soot load on the pressure drop and temperature characteristics， complete regeneration duration and cumulative diesel consumption of the CDPF in a methanol/diesel dual fuel engine during active regeneration were investigated. The results show that the regeneration target temperatures， methanol substitution rates， and initial carbon load have significant impacts on the active regeneration of CDPF. With the increase of regeneration target temperature， the rate of pressure drop decreases. Higher regeneration target temperature can easily lead to temperature peaks in CDPF. When regeneration occurs at 650 ℃， the peak temperature of CDPF is 85 ℃ higher than the target temperature. As the methanol substitution rate increases， the pressure drops during the regeneration process slightly increases and the peak temperature of the CDPF decreases. As the initial soot load increases， the reaction rate of CDPF accelerates， the peak temperature of the CDPF and the pressure drop rate increase， and the uniformity of the internal temperature of the carrier is improved. The increase of regeneration target temperature can significantly shorten the duration of complete regeneration and reduce the cumulative diesel fuel consumption， while the methanol substitution rate has less effect on the duration of complete regeneration. With the methanol substitution rate increases from 0% to 30%， the cumulative diesel fuel consumption for complete regeneration reduces by 27.8%. Under the condition of 600 ℃ regeneration target temperature， 30% methanol substitution rate， and 20 g initial soot load， high regeneration efficiency and regeneration safety with less regeneration energy consumption can be achieved. |
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