面向控制的DPF再生效率建模和试验研究

doi:10.19562/j.chinasae.qcgc.2021.01.006

Abstract

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 E_a =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

Tiexiong Huang,Guangdi Hu,Zhongwei Meng,Dongjian Zeng. Control‑Oriented Modeling and Experimental Study of Thermal Regeneration Efficiency of Diesel Particulate Filter[J].Automotive Engineering, 2021, 43(1): 44-49.

Figures/Tables 10

References 14

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参数	数值
缸径/mm	93
行程/mm	102
发动机排量/L	2.77
压缩比	17.5
额定功率/kW	80(3 000 r·min^-1)
DOC载体材料	堇菁石
DOC载体直径/mm	118.4
DOC载体长度/mm	152.4
DOC载体孔密度/cpsi	400
DPF载体材料	碳化硅
DPF载体直径/mm	143.8
DPF载体长度/mm	228.6
DPF载体孔密度/cpsi	300

名称	参数
长×宽×高/mm	5 050×1 720×1 700
轴距/mm	3 025
整备质量/kg	1 775
额定载质量/kg	400
主减速比	4.1
变速器传动比	4.45、2.39、1.41、1、0.82, R: 4.22

工况	再生温度/℃	试验时长/min	碳载量变化/g	再生速率/(g·h^-1)
1	500	5	3.23	38.78
2	525	5	6.98	83.78
3	549	5	9.89	118.71
4	573	5	15.56	186.73
5	596	5	22.77	273.22

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

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