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Title of Journal: J Mech Sci Technol

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Abbravation: Journal of Mechanical Science and Technology

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Korean Society of Mechanical Engineers

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DOI

10.1002/jbm.a.30789

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ISSN

1976-3824

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Experimental analysis of emission reduction by the

Authors: Jeongwoo Lee Seungmok Choi Seunghyup Shin Hoimyung Choi Kyoungdoug Min
Publish Date: 2012/04/11
Volume: 26, Issue: 4, Pages: 1265-1274
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Abstract

As EURO6 regulations will be enforced in 2014 simultaneous reduction of NOx and PM emissions becomes an important issue in recent diesel engine research New combustion concepts such as LTDC and pHCCI have been introduced to overcome the NOx and PM tradeoff relation However these novel combustion concepts are usually implemented with a high EGR rate and by advancing the main injection timing which cause high CO and THC emissions along with poor fuel consumption due to low combustion efficiency Therefore the split injection strategy which was consisted of applying post injection close to the main injection was carried out in this experiment Specifically two different nozzles — a 7hole conventional nozzle and a 12hole doublerow nozzle — were evaluated to determine the effects of nozzle configurations on engineout emissions The result shows that CO emission was reduced by the close post injection strategy regardless of the nozzle configuration However THC and PM emissions were reduced only when the 12hole doublerow nozzle was used Thus the use of close post injection with the 12hole doublerow nozzle could increase the combustion efficiency in heavy EGR conditionsJeongwoo Lee received his BS from the Department of Mechanical Engineering at Seoul National University in 2010 He is currently an MS candidate in the Department of Mechanical Engineering at Seoul National University His research interests are diesel engine combustion and emissionKyoungdoug Min received his BS and MS degrees from the Department of Mechanical Engineering at Seoul National University in 1986 and 1988 respectively He then obtained his PhD degree from MIT in 1994 He is currently a professor in the School of Mechanical and Aerospace Engineering at Seoul National University

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