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Analyses of Thermal Shock Failure on Large Volume DPF
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English
Abstract
Ceramic honeycomb wall flow diesel particulate filters (DPF) have been investigated for use in exhaust gas control of diesel vehicles. However, before they can be used, prevention of thermal shock failure during combustion regeneration is necessary.
Studies were conducted on thermal shock failures on 9-inch diameter large volume DPF during regeneration by finite element analyses (FEA). These studies reveal that, within safe limits, maximum thermal stress is almost constant even at different gas flow rates and oxygen concentrations.
Regeneration tests were also conducted on large volume DPF of several materials having different pore size distributions. FEA thermal stress was compared with mechanical strength of the material at safe levels.
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Kitagawa, J., Hijikata, T., and Makino, M., "Analyses of Thermal Shock Failure on Large Volume DPF," SAE Technical Paper 900113, 1990, https://doi.org/10.4271/900113.Also In
References
- Environmental Protection Agency “Control of Air Pollution from New Motor Vehicles and New Motor Vehicle Engines; Gaseous Emission and Particulate Emission Regulations” Federal Register Part- III 50 51 March 15 1985
- Higuchi N. Mochida S. Kojima M. “Optimized Regeneration Conditions of Ceramic Honeycomb Diesel Particulate Filters” 1983 SAE Trans. 830078
- Mizuno H. Kitagawa J. Hijikata T. “Effect of Cell Structure on Regeneration Failure of Ceramic Honeycomb Diesel Particulate Filters” 1987 SAE Trans. 870010
- Mizuno H. Kitagawa J. Hijikata T. “Controlling of Heating Rate for Safe Regeneration of Ceramic Honeycomb Diesel Particulate Filter” 1988 SAE Trans. 880002
- Kitagawa J. Hijikata T. Makino M. “Effect of DPF Volume on Thermal Shock Failures during Regeneration” SAE Paper No. 890173 1989
- Kitagawa J. “Thermal Shock Failures of Ceramic Diesel Particulate Filters” ATA Paper E2.7 1989
- Hasselmann D. P. H. “United Theory of Thermal Shock Fracture Initiation and Crack Propagation in Brittle Ceramics” J. Am. Ceram. Soc. 52 11 600 1969