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http://dx.doi.org/10.3795/KSME-B.2011.35.5.525

Comparison of Combustion Characteristics On the Basis of the Dilution Ratio in Diesel Engines with LPL EGR  

Lim, Gi-Hun (Dept. of Environmental System Engineering, Univ. of Science and Technology)
Park, Jun-Hyuk (Dept. of Mechanical Engineering, Kyungwon Univ.)
Choi, Young (Engine Research Team, Korea Institute of Machinery and Materials)
Lee, Sun-Youp (Engine Research Team, Korea Institute of Machinery and Materials)
Kim, Yong-Min (Engine Research Team, Korea Institute of Machinery and Materials)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.5, 2011 , pp. 525-531 More about this Journal
Abstract
Exhaust gas recirculation (EGR) is more effective than selective catalytic reduction (SCR) or lean $NO_x$ trap (LNT) for the reduction of $NO_x$ emissions in diesel engines. A large amount of EGR gas is necessary to satisfy the stringent regulations on $NO_x$ emissions. Low pressure loop (LPL) EGR is almost independent of the variable geometry turbocharger (VGT) at a specific boost pressure, so LPL EGR is better than conventional high pressure loop (HPL) EGR in terms of EGR supply. We compare the influence of HPL EGR and LPL EGR on the combustion characteristics at a constant boost pressure in a diesel engine. The dilution ratio was employed as an independent parameter to analyze the effect of the dilution of the intake charge for each EGR loop. At the same level of $NO_x$ emissions, the fuel consumption and smoke opacity were slightly lower for LPL EGR than for HPL EGR.
Keywords
HPL EGR; LPL EGR; $NO_x$; PM; Dilution Ratio;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
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