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Energies 2018, 11(2), 472; https://doi.org/10.3390/en11020472

Estimation of the Diesel Particulate Filter Soot Load Based on an Equivalent Circuit Model

School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
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Received: 31 January 2018 / Revised: 16 February 2018 / Accepted: 21 February 2018 / Published: 23 February 2018
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Abstract

In order to estimate the diesel particulate filter (DPF) soot load and improve the accuracy of regeneration timing, a novel method based on an equivalent circuit model is proposed based on the electric-fluid analogy. This proposed method can reduce the impact of the engine transient operation on the soot load, accurately calculate the flow resistance, and improve the estimation accuracy of the soot load. Firstly, the least square method is used to identify the flow resistance based on the World Harmonized Transient Cycle (WHTC) test data, and the relationship between flow resistance, exhaust temperature and soot load is established. Secondly, the online estimation of the soot load is achieved by using the dual extended Kalman filter (DEKF). The results show that this method has good convergence and robustness with the maximal absolute error of 0.2 g/L at regeneration timing, which can meet engineering requirements. Additionally, this method can estimate the soot load under engine transient operating conditions and avoids a large number of experimental tests, extensive calibration and the analysis of complex chemical reactions required in traditional methods. View Full-Text
Keywords: diesel particulate filter; soot load estimation; flow resistance; equivalent circuit model; dual extended Kalman filter diesel particulate filter; soot load estimation; flow resistance; equivalent circuit model; dual extended Kalman filter
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Du, Y.; Hu, G.; Xiang, S.; Zhang, K.; Liu, H.; Guo, F. Estimation of the Diesel Particulate Filter Soot Load Based on an Equivalent Circuit Model. Energies 2018, 11, 472.

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