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A Study on the Conversion Performance of Lean NOx Trap for a 4-stroke Diesel Engine  

Han, Joon-Sup (Graduate School of Mechanical Engineering, Hanyang University)
Oh, Jung-Mo (Graduate School of Mechanical Engineering, Hanyang University)
Lee, Ki-Hyung (Department of Mechanical Engineering, Hanyang University)
Lee, Jin-Ha (Exhaust Emission Engineering Team, Hyundai Motor Company)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.19, no.2, 2011 , pp. 78-83 More about this Journal
Abstract
Diesel engine has many advantages such as high thermal efficiency, low fuel consumption and low emission of CO2. However, the diesel engine faced with strengthened emission regulation about NOx and PM. To suppress NOx emission, after-treatment systems such as Lean NOx Trap (LNT), Selective Catalytic Reduction (SCR) are considered as a more practical strategy. This paper investigated the performance of Lean NOx trap of the 4 stroke diesel engine which had a LNT catalyst. Characteristic of exhaust emission at NEDC mode was analyzed. From this result, the effect of nozzle attaching degree, injection quantity and gas flow change on NOx conversion performance was clarified.
Keywords
Diesel engine; Lean Nox Trap(LNT); External injection; Aftertreatment; Reductant;
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