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WALL FLOW FILTER
NING Zhi1 SONG Bo1 LIU Jianhua11 ZI Xinyun2 ZHANG Chunrun2 XU Mengjun3
(1. College of Mechanical and Electrical Engineering, Beijing Jiaotong University, Beijing 100044;
2. Department of Automobile Engineering, College of Military Transportation, Tianjin 300161;
3. Yixing Chemical and Mechanical Plant of Nonmetal, Yixing 214221)
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Abstract: The
technology of diesel particulate filter is recognized as one of the most
effective purifying technologies of diesel particulate at present, and
the ceramic wall flow filter is the most important component of the DPF
technology. In order to satisfy the need of the development of ceramic
wall flow filter, the optimization study of the configuration parameters
of ceramic wall flow filter is conducted. According to the displacement
of diesel engine, the filters are divided into three kinds of sizes
corresponding to 2~4 L, 6~8 L and 10 L or more displacement of the
diesel engine respectively, the lowest filter efficiencies of the filter
of different sizes are divided into three grades: 80%, 90% and 98%, and
the configuration size and the inside parameters of the filter are
optimized based on the dividing of the sizes and filter efficiencies. An
optimization method combining the method of region optimization with the
second optimization is used in the process of filter optimization. The
range of the routeway width and the thickness of the filter wall are
determined by using the method of region optimization, and the
optimization parameters of porosity and pore diameter are determined by
using the second optimization. Consequently, the optimization parameter
ranges of different size filters are determined under different filter
efficiencies.
Key words: Diesel
engine Particulate Ceramic wall flow filter Optimization
CLC No: TK421.5
国家高技术研究发展计划(863计划)(2001AA643020)和国家自然科学基金(40475048)资助项目. Received 20051016, received
in revised form 20060620
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