A Thermal Analysis of Active-flow Control on Diesel Engine Aftertreatment

One-dimensional transient modeling techniques are adapted to analyze the thermal behavior of lean-burn after-treatment systems when active flow control schemes are applied. The active control schemes include parallel alternating flow, partial restricting flow, and periodic flow reversal (FR) that ar...

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Published in:SAE transactions 2004-01, Vol.113, p.1951-1962
Main Authors: Zheng, Ming, Reader, Graham T., Wang, Dong, Zuo, Jun, Wang, Meiping, Mirosh, Edward A., van der Lee, Arie, Liu, Benlin
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container_end_page 1962
container_issue
container_start_page 1951
container_title SAE transactions
container_volume 113
creator Zheng, Ming
Reader, Graham T.
Wang, Dong
Zuo, Jun
Wang, Meiping
Mirosh, Edward A.
van der Lee, Arie
Liu, Benlin
description One-dimensional transient modeling techniques are adapted to analyze the thermal behavior of lean-burn after-treatment systems when active flow control schemes are applied. The active control schemes include parallel alternating flow, partial restricting flow, and periodic flow reversal (FR) that are found to be especially effective to treat engine exhausts that are difficult to cope with conventional passive flow converters. To diesel particulate filters (DPF), lean NOx traps (LNT), and oxidation converters the combined use of active flow control schemes are identified to be capable of shifting the exhaust gas temperature, flow rate, and oxygen concentration to more favorable windows for the filtration, conversion, and regeneration processes. Comparison analyses are made between active flow control and passive flow control schemes in investigating the influences of gas flow, heat transfer, chemical reaction, oxygen concentration, and converter properties. Some of the simulation results, such as the periodic flow reversal results, are largely in agreement with the previous empirical observation.
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title A Thermal Analysis of Active-flow Control on Diesel Engine Aftertreatment
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