Experimental study on emission and control strategy of regenerative particulate filter for a light-duty diesel vehicle
MA Biao
ZHANG Fangge
CHENG Xiaozhang
WANG Chenfang
Abstract：In order to ensure that the emissions of a certain light-duty diesel vehicle meet the National 6b emission standards,based on the emission requirements for nitrogen oxides(NOx)in light-duty diesel engines under the China 6b emission standards,a technical scheme for the selective catalytic reduction-coated diesel particulate filter(SDPF)after-treatment system is developed.An SDPF control strategy integrating a feedforward model and feedback control is established,and control parameters are calibrated using engine bench tests,and the control strategy and emission testing verification are conducted.The results of the chassis dynamometer WLTC tests show that the efficiency of the SDPF chemical reaction model is highly consistent with the NOx conversion efficiency measured by NOx sensors,with discrepancies less than 10％,confirming the correctness and effectiveness of the control strategy.The proposed scheme achieves a NOx conversion rate of 96.1％,with all pollutant emissions meeting the engineering targets,successfully reaching the China 6b emission standard for a particular light-duty diesel vehicle.
Keywords：light diesel engineSDPFafter-treatment control strategyWLTC test
Publication Date：2024-10-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 1-7 )