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| Study on Design and Application of a Catalyzed Gasoline Particulate Filter |
| DOI：10.13949/j.cnki.nrjgc.2020.01.012 |
| Key Words:gasoline direct injection（GDI） catalyzed gasoline particulate filter(CGPF) gaseous solid pollutants particulate matter filtration efficiency |
| Author Name | Affiliation | | YANG Dongxia,XIA Wenzheng,YUAN Xinbo,NING Ping,FENG Feng,HE Xiaokun | 1.Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
2.State Local Joint Engineering Laboratory of Precious Metal Catalytic Technology and Application, Kunming Sino Platinum Metals Catalyst Co., Ltd., Kunming 650106， China |
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| Abstract:The design and application of an underfloor gasoline particulate filter(GPF) and catalyzed gasoline particulate filter(CGPF) were carried out on a 1.6 litre, direct injection gasoline sedan. The effect of different wash-coat loadings, coating processes and precious metal contents on the cold flow back pressure and coating morphology of the GPF and CGPF systems were studied, and a low back pressure CGPF sample was designed accordingly. Through the worldwide harmonized light vehicles test cycle(WLTC) for gasoline vehicles according to the requirements of CN6 emission regulation, the effect of the underfloor GPF, CGPF and different precious metal contents on exhaust aftertreatment systems were investigated, respectively, by comparing with the emission performance of original close-coupled three-way catalytic converter. Results show that the addition of underfloor GPF or CGPF system downstream of the three-way catalytic converter increases the exhaust back pressure, but does not significantly increase the fuel consumption, which can effectively solve the problem of excessive PN caused by using three-way catalytic converter alone. At the same time, the use of CGPF system can better remove gaseous pollutants while ensuring particulate filtration efficiency, and make various emission indicators meet the requirements specified in CN6 emission regulation. Besides, Preconditioning of the CGPF system according to the WLTC procedure can effectively improve its particulate trapping ability, resulting in an increase of particulate filtration efficiency from 76.38% to 97.00%. |
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