汽车工程 ›› 2021, Vol. 43 ›› Issue (1): 44-49.doi: 10.19562/j.chinasae.qcgc.2021.01.006

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面向控制的DPF再生效率建模和试验研究

黄铁雄1,2(),胡广地2,孟忠伟1,曾东建1   

  1. 1.西华大学汽车与交通学院,成都 610039
    2.西南交通大学机械工程学院,成都 610031
  • 收稿日期:2020-07-01 修回日期:2020-08-10 出版日期:2021-01-25 发布日期:2021-02-03
  • 通讯作者: 黄铁雄 E-mail:huangtxl@126.com
  • 基金资助:
    四川省科技计划项目(2018HH0019)

Control‑Oriented Modeling and Experimental Study of Thermal Regeneration Efficiency of Diesel Particulate Filter

Tiexiong Huang1,2(),Guangdi Hu2,Zhongwei Meng1,Dongjian Zeng1   

  1. 1.School of Automobile & Transportation,Xihua University,Chengdu 610039
    2.School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031
  • Received:2020-07-01 Revised:2020-08-10 Online:2021-01-25 Published:2021-02-03
  • Contact: Tiexiong Huang E-mail:huangtxl@126.com

摘要:

对柴油机颗粒物捕集器(DPF)的再生效率进行实时和准确的在线预估,可为DPF热再生结束的控制提供判断依据,是实现DPF系统化和高效应用的重要功能。本文基于热再生过程中DPF内碳烟颗粒的氧化反应机理探讨并建立了DPF再生效率计算模型,通过发动机台架试验对模型的化学反应动力学参数进行了校核和辨识,从而得到DPF内碳烟颗粒热再生氧化反应的反应级数为α=1与活化能参数为Ea =107.5 kJ/mol。台架稳态工况和车辆在实际道路行驶工况的试验结果表明,再生效率模型最大计算误差为5.6%,较好满足实际应用需求,为DPF热再生中准确判断再生结束的时机提供了参考。

关键词: 柴油机颗粒物捕集器, 热再生, 再生效率, 建模

Abstract:

Real?time and accurate on?line estimation of the thermal regeneration efficiency of diesel particulate filter (DPF) can provide the judgment basis for the control of the end of DPF thermal regeneration, and it is a key function of realizing systematic and efficient application of DPF. In this paper, a calculation model of the DPF thermal regeneration efficiency is discussed and established based on the oxidation mechanism of soot particles in the DPF during the thermal regeneration period. The chemical reaction kinetic parameters of the model are checked and identified by engine bench test. It is derived that the oxidation reaction order of the DPF thermal regeneration is α=1 and the activation energy parameter is Ea =107.5 kJ/mol. The test results of steady?state conditions on the bench and actual road driving conditions show that the maximum calculation error of the regeneration efficiency model is 5.6%, which can meet the engineering requirements and provide a meaningful reference for accurate judgment of regeneration ending in DPF thermal regeneration.

Key words: diesel particulate filter, thermal regeneration, regeneration efficiency, modeling