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SI엔진에서 흡기포트각도와 방전특성이 연소에 미치는 영향
강병무(B. M. Kang),이중순(J. S. Lee),정성식(S.S. Chung),하종률(J. Y. Ha) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
This study is performed to observe effects of the flow characteristics and discharge energy distributions on combustion in the DOHC SI engine with pentroof combustion chamber. Variations of flow characteristics is achieved by two cylinder heads. which are reformed intake port angle ( 20' , 15'), and conventional cylinder head( 25'). we also used a high frequency ignition system (HIS) and a capacity discharge ignition system (CDI) with different discharge energy distributions to observe the effect of ignition characteristics. According to the comparison of IMEP. Pmax, COY between experimental conditions, combustion state is relatively stable combustion in the case of conventional cylinder head( 25' ) and HIS<br/> <br/>
[디젤엔진] 층상연료분사(경유/메탄올)를 이용한 디젤엔진의 Nox와 Soot 동시저감에 관한 연구
강병무(B.M. Kang),김종률(J.Y. Kim),이선봉(S.B. Lee),이태원(T.W. Lee),하종률(J.Y. Ha) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To investigate the simultaneous reduction of Soot and Nox, we developed a new conception for dual fuel stratified injection system in a Diesel Engine.<br/> Nozzle and delivery valve of conventional injection system were remodeled to inject diesel and methanol in order from one injector. The quantity of disel and methanol was controled precisely by micrometers that were mounted at injection quantity control lack.<br/> The real injection quantity ratio of dual fuel was certificated by volumetric ratio at injection quantity experiment. We could confirm capability that Soot and Nox simultaneously were reduced by diesel-methanol stratified injection from the results of in-cylinder pressure data obtained from combustion experiment by stratified injection, heat release rate, mass fraction burned and pressure rise rate.
[디젤엔진부문] 이종연료 층상분사를 이용한 디젤엔진의 NOx와 soot 동시 저감에 관한 연구
강병무(B.M. Kang),김종률(J.Y. Kim),이태원(T.W. Lee),정성식(S.S Chung),하종률(J.Y. Ha) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
<br/> ~~.A\-%7}t'--c:j-~ 2000\15:. ~;>jI~t:1J~<br/> 2000-03-2041<br/> 01<br/> 3S. 91 ~ ~A~~<br/> A<br/> L.s:.<br/> OI<br/> Ho~<br/> c:"~.n. C::>C>c r2. C:::>L ;<br/> C/~2!!~~ NOx$ soot ~AI AI~OU ~~ eF?<br/> 7J'!!-';'-, 7,J'6-it(%ottJI-o:}jj! tJI~~), 01I11~(~~ ~~tJI-O:}), '\J'\J-6j, "6J-'6-iH%ottJI-o:}jj!)<br/> A Study on the Simultaneous Reduction of :>iOx and Soot<br/> with Dual Fuel Stratified Injection System in a Diesel Engine<br/> B. 1\1. Kang, ]. Y. Kim(Graduated School of Dong- A L'niv'>, T. W. Lee(Changwon CQUage), S. S. Chung, ]. Y. Ha(Dong-A Univ,)<br/> ABSTRACT<br/> To investigate the method of the simultaneous reduction of Soot and NOx, we developed a new conception for dual fuel stratified injection system in a Diesel Engine.<br/> Some parts of the injection system, ie. nozzle holder, delivery vale. were remodeled to inject diesel and methanol in order from one injector. The Quantity of diesel and methanol was controled precisely by micrometers that were mounted at control lack of injection pump.<br/> The real injection Quantity ratio of dual fuel was certificated by volumetric ratio at injection Quantity experiment. We could confirm the capability that soot and NOx simultaneously were reduced by diesel-methanol stratified injection from the results of combustion and exhaust characteristic.<br/>
층상연료분사(경유/메탄올)를 이용한 디젤엔진의 NOx와 Soot 동시 저감에 관한 연구 (제2보 : 층상분사 연소특성 및 배기 특성)
강병무 ( B. M. Kang ),이태원 ( T. W. Lee ),정성식 ( S. S. Chung ),하종률 ( J. Y. Ha ) 한국분무공학회 2002 한국액체미립화학회지 Vol.7 No.1
N/A This paper is study on simultaneous reduction of NOx and soot for direct injection diesel engine using high and low cetane fuels. The stratified injection system was applied for diesel engine to use high and low cetane fuel. In this study, diesel fuel was used as high cetane fuels, methanol was used as low cetane fuels. Some parts of the injection system, ie. Nozzle holder, delivery vale, was remodeled to inject dual fuel sequentially from one injector. The real injection quantity ratio of dual fuel was certificated by volumetric ratio at injection quantity experiment. According as concentration of low cetane fuel was varied, combustion experiment was performed using Toroidal and Complex chamber. Also, exhaust gas and fuel consumption were measured at the same time. Simultaneous reduction of NOx and soot was achieved at complex chamber regardless of concentration of low cetane fuel. However, according as concentration of low cetane fuel was increased, THC and CO was increased.
점화에너지 특성이 예혼합기의 착화와 연소에 미치는 영향(2)
이중순(J. S. Lee),강병무(B. M. Kang),정성식(S. S. Chung),하종률(J. Y. Ha) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
In order to develop a new concept of ignition system, we observed the characteristics obtained from the ignition and combustion experiments where each of two kinds of ignition devices were introduced into the visualized engine and a constant volume combustion chamber with sub-chamber. The conclusion from the observation can be summarized as follows: 1) The ignitability limit for HIS expands wider and the combustion is more stable than for CDI 2) The combustion duration and ignition timing depends upon the distribution of local mixture density in the vicinity of ignition spark plug.<br/>
이종연로 층상분사를 적용한 디젤엔진에서 광 계측을 이용한 연소해석
안현찬 ( H. C. An ),강병무 ( B. M. Kang ),염정국 ( J. K. Yeom ),정성식 ( S. S. Chung ),하종률 ( J. Y. Ha ) 한국분무공학회 2002 한국액체미립화학회지 Vol.7 No.3
N/A In previous study, diesel-methanol stratified injection system is manufactured and applied to a D.I. diesel engine in order to realize combustion improvement using methanol, which is oxygenated fuel with large latent heat. We know that NOx and soot is reduced by stratified injection of diesel fuel-methanol. Therefore, in the present study, combustion diagnosis using optical measurement is tried to make clear effect of methanol on simultaneous reduction of NOx and soot. Two-color method is used to measure flame temperature and KL value, which is approximately proportional to the soot consentration along the optical path. Laser induced scattering method was used to measure distribution of soot at two dimensional area. Also, it is compared exhaust characteristics of NOx and soot with results of optical measurement.
SI엔진에서 흡기포트각도와 방전특성이 연소에 미치는 영향
강병무,이중순,정성식,하종률 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.1
This study is performed to observe effects of the flow characteristics and discharge energy distributions on combustion in the DOHC SI engine with pentroof combustion chamber. Variations of flow characteristics is achieved by two cylinder heads, which are reformed intake port angle (20˚, 15˚) and conventional cylinder head(25˚). We also used a high frequency ignition system (HIS) and a capacity discharge ignition system (CDI) with different discharge energy distrubutions to observe the effect of ignition characteristics. According to the comparison of IMEP, Pmax, COV between experimental conditions, combustion state is relatively stable combustion in the case conventional cylinder head(25˚) and HIS.