摘要
为解决柴油机颗粒捕集器(diesel particulate filter,DPF)载体环裂故障,以2台编号分别为A、B的柴油机为试验对象,柴油机A在全球统一瞬态试验循环(world harmonized transient cycle,WHTC)工况下积碳后进行再生试验和降怠速(drop-to-idle,DTI)再生试验,分析不同积碳循环和不同再生设定温度下DPF内部各测点的温度变化;对柴油机B进行热冲击试验和WHTC工况下无积碳再生试验,分析再生过程中DPF内部各测点的温度变化。试验结果表明:碳载量分布不均匀和再生设定温度较高是导致DPF载体环裂故障的主要原因。通过控制DPF再生起燃速度,将再生设定温度由600℃降至560℃,碳载量控制在4.5 g/L以内,在有阶梯再生的情况下,DPF内部温度峰值和温度梯度均正常,可降低DPF载体环裂风险,提高DPF使用的可靠性。
To solve the ring crack fault of diesel particulate filter(DPF)carrier,two diesel engines numbered A and B respectively are taken as test objects.Regeneration test and drop-to-idle(DTI)test of diesel engine A after carbon deposition are carried out under the working condition of world harmonized transient cycle(WHTC),which are used to investigate the temperature change of various measuring points within DPF for different carbon deposition cycles and regeneration set temperatures.Regeneration test without carbon deposition under the working condition of WHTC and thermal shock test of diesel engine B are carried out,which are used to analyze the temperature change of various measuring points within DPF during the process of regeneration.The test results show that the uneven distribution of carbon load and high regeneration set temperature are the main reasons for the ring crack of DPF carrier.By controlling the ignition rate of DPF regeneration,the calibration value of regeneration set temperature can be decreased from 600℃to 560℃,and the carbon load can be controlled within 4.5 g/L.In the case of stepped regeneration,the internal temperature peak and temperature gradient of DPF are normal,which can reduce the risk of ring cracking of DPF carrier and improve the service reliability of DPF.
作者
杨海龙
辛欣
郑志强
杨永春
刘斌
刘阳
刘波
YANG Hailong;XIN Xin;ZHENG Zhiqiang;YANG Yongchun;LIU Bin;LIU Yang;LIU Bo(State Key Laboratory of Engine Reliability, Weifang 261061, China;Weichai Power Co.,Ltd.,Weifang 261061, China)
出处
《山东交通学院学报》
CAS
2022年第3期8-13,共6页
Journal of Shandong Jiaotong University
基金
山东省重点研发计划项目(2020GXGC011004)。
关键词
柴油机
DPF
载体环裂
再生温度
碳载量
diesel engine
DPF
ring crack of carrier
regeneration temperature
carbon load
