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[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/>
윤수한(S.H.Yoon),이중순(J.S.Lee),전대수(D.S.Jun),정성식(S.S.Chung),하종률(J.Y.Ha) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
In this research, we use IDI type constant volume combustion chamber which is made possible to stratified combustion to construct the design back data of lean-burn engine. Some experiments are conducted by the passagehole angle in the adapter of main and sub-chamber. The effects on the comustion according to the discharge characteristics are investigated. The used fuel is methanol prospective as an alternative fuel. Flame propagation process in the main and sub-chamber are analyzed by pictures. As the results experiments, combustion characteristics reveals that ignition timing, passagehole angle.and discharge method greatly effects on.<br/>
박종상(C.S.Park),이명준(M.J.Lee),이태원(T.W.Lee),하종률(J.Y.Ha),정성식(S.S.Chung) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
The process of moisture evaporation, ignition delay, and volatile combustion of single CWM droplet was observed with the variation of initial droplet diameter at the surrounding temperatures of 1173K and 1373K.<br/> Results for the variation of the mass, the mass fraction burned, and the density of droplet are the followings<br/> The process of the moisture evaporation and the volatile combustion is largely effected by the surrounding temperature and the initial droplet diameter, also 60of initial mass is reduced during this reaction period.<br/> The effect of the surrounding temperature upon the density variation of droplet is little, on the other hand the decrease of droplet diameter accompanies with about 10reduction of density.
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/>
이종숭(J.S.Lee),이중순(J.S.Lee),정성식(S.S.Chung),하종률(J.Y.Ha) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
For a digital engine control system, control timings such as ignition and injection are based on the crank shaft angle. Therefor, it is very important that the angle of the crank shaft have to be detected with accuracy for the fuel injection and ignition timing, the sequential multi-point injection(MPI) system that has a independent injector in each cylinder, is used to inject the fuel of the accurate quantity, and to cope with varying of the engine status. The distributorless ignition(DLI) System that is the direct ignition method, is used for the accurate ignition and the flexible ignition timing. We install a sensor that occurs a number of events for the accurate detecting of the angle of the crank shaft.<br/> This study aims to make a event detecting algorithm, a method to detect the crank shaft angle by a event, and a software witch output a control signal at the given angle values.<br/>
이중순(J.S.Lee),이종숭(J.S.Lee),정성식(S.S.Chung),하종률(J.Y.Ha) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
The purpose of this research is to clarify that ignition characteristics such as ignition energy and discharge pattern have effect upon maximum pressure, maximum pressure appearance timing, IMEP and revolution of engine on the lean burn of mixture. In this paper. We studied relations between discharge performance of ignition energy and extension of lean inflammability by development of High Frequency Ignition System.<br/>