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Effects of DPF Volume on Thermal Shock Failures during Regeneration
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English
Abstract
Application of ceramic honeycomb wall-flow type diesel particulate filters (DPF) to heavy duty vehicles requires a large volume filter. Heavy duty vehicles produce a large volume exhaust gas, and pressure drop in the exhaust system must be maintained to a certain level. In addition, the filters must be designed to resist fracture from thermal stresses during regeneration. This is particularly important in heavy duty vehicles because of these extended mileage requirements.
These studies of the effects of DPF volume on thermal shock resistance during regeneration reveal that the maximum failure temperatures are lower as DPF volume is increased, still maintaining 950°C maximum temperature with 12 ℓ volume and 9″D × 12″L size large DPF.
Some thermal stress analyses with temperature profiles and finite element analysis were conducted on four different volume DPF during regeneration.
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Citation
Kitagawa, J., Hijikata, T., and Makino, M., "Effects of DPF Volume on Thermal Shock Failures during Regeneration," SAE Technical Paper 890173, 1989, https://doi.org/10.4271/890173.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 III 50 51 March 15 1985
- Mizuno H. Kitagawa J. Hijikata T. “Effect of Cell Structure on Regeneration Failure of Ceramic Honeycomb Diesel Particulate Filter” SAE Paper No. 870010 1987
- Mizuno H. Kitagawa J. Hijikata T. “Controlling of Heating Rates for Safe Regeneration of Ceramic Honeycomb Diesel Particulate Filter” SAE Paper No. 880002 1988
- Higuchi N. Mochida S. Kojima M. “Optimized Regeneration Conditions of Ceramic Honeycomb Diesel Particulate Filters” SAE Paper No. 830078 1983