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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/>
[가솔린엔진] 화염온도와 연소기간이 열손실에 미치는 영향
윤수한(S.H. Yoon),전대수(D.S. Jun),하종률(J.Y. Ha) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The IDI type constant volume chamber is used in this study, which is applied Indirect Injection stratified charge method to solve the problems of lean-burn such as misfire and cycle-variation by the unstable initial ignition. It has sub-chamber formed the ignitable mixture under the low mean equivalence ratio. After combustion starts in the sub-chamber, the flame issues as a jet through the passage hole into the main chamber, and entrained flame ignite the lean mixture in the main chamber. There are many factors to effect on the combustion characteristics in indirect injection stratified engine. The passage hole angle is the most important factor in that determine the direction of issued mixturel and flame to the main chamber<br/> In this study, we measured combustion pressure, surface temperature of wall and computed heat flux to clarify the combustion characteristics and heat loss on each the passage hole angle and equivalence ratio in the main chamber
IDI형 정적 연소기에서 점화시기 및 연락공의 형상이 연소특성에 미치는 영향
윤수한(S. H. Yoon),이중순(J. S. Lee),김현지(H . J. Kim),배종용(J. Y. Bae),하종률(J. Y. Ha) 한국자동차공학회 1996 한국 자동차공학회논문집 Vol.4 No.3
In this research, we use 1DI type constant volume combustion chamber which may make up strati-fied combustion to construct the design back data of lean-burn engine. Some experiments are con. ducted by the passagehole angle in the adapter of main chamber and sub-chamber. The effects on the combustion characteristics according to the ignition timing are investigated. The used fuel is methanol prospective for alternative fuel. Fuel is injected under l0.78MPa using solenoid and accumulator. As the results of the experiment, combustion characteristics reveals that ignition tim-ing, passagehole angle and shape greatly effects on. Lean inflammability limit is extended to 0.45 in equivalence ratio.<br/>
윤수한(S.H.Yoon),이중순(J.S.Lee),김현지(H.J.Kim),박춘근(C.G.Park),하종률(J.Y.Ha) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
This research is about lean burn which can be satisfied with the limitation of both exhaust gas and fuel consumption. But as the mixing ratio is lean, combustion state becomes unstable, the ignitability becomes bad, and the mean effective pressure decrease. To solve the problems is one of the most important things. The aim of this study is to extend the lean limit and to make rapid combustion for the stable combustion, the improvement of fuel consumption ratio and the decrease of hamful gas. <br/> It is possible to extend the lean inflammability limit in the IDI engine. We can greatly<br/> improve the ignitability in the lean field by providing the sub-chamber with methanol.<br/> This study shows that we can design and produce the sub-chamber type constant volume combustion chamber. We can use methanol as the fuel to be injected into the chamber with the high pressure of 8∼20MPa.<br/> Like this, we define the combustion process, extend the lean inflammability limit therefore we can give you some useful materials for the developments and improvment of lean burn engine.<br/>
솔레노이드를 사용한 정압 연료분사 장치의 제어에 관한 연구
윤수한(S.H.Yoon),김현지(H.J.Kim),배종용(J.Y.Bae),하종률(J.Y. Ha) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_1
For the practical use of a fuel injection system using solenoid, some mechanical and electrical problems should be explicitly analyzed. In our study, we have investigated these problems experimentally and have improved such that a solenoid driving circuit is liable to establish a fast response and a precise control of injection quantity. This developed device is capable to control equivalance ratio from low level to high level. Therefore, we are expected that this developed device should be applicable to an actual engine.<br/>
솔레노이드를 사용한 정압 연료분사 장치의 제어에 관한 연구
윤수한(S. H. Yoon),이중순(J. S. Lee),김현지(H. J. Kim),배종용(J. Y. Bae),하종률(J. Y. Ha) 한국자동차공학회 1996 한국 자동차공학회논문집 Vol.4 No.1
For the practical use of a fuel injection system using solenoid, some mechanical and electrical problems should be explicitly analyzed. In our study, we have investigated these problems experimentally and have improved such that a solenoid driving circuit is liable to establish a fast reponse and a precise control of injection quantity. This proposed fuel injecton system is capable to control equivalence ratio from low level to high level. Therefore, we expect that this proposed system should be applicable to an actual engine.
전대수(D.S.Jun),이태원(T.W.Lee),윤수한(S.H.Yoon),하종률(J.Y.Ha) 한국자동차공학회 2000 한국 자동차공학회논문집 Vol.8 No.1
In the present study, the IDI-type constant volume chamber, which utilizes the indirect injection stratified charge method, is used to solve several problems including misfires and cycle-variations caused by unstable initial ignitions. A subchamber has been used to make an ignitable mixture under the low mean equivalence ratio.<br/> After burned in the subchamber, the flame jet getting through the passage hole enters the main chamber and bums the lean charge. There are many factors which affect the combustion characteristics of the indirect injection stratified engine.<br/> The passage hole angle is the most important since it determines the direction of flame flows<br/> into the main chamber.<br/> In the present study, we measured the combustion pressure, and the wall temperature, and computed the heat flux through the cylinder wall in order to understand the combustion characteristics depending on passage hole angle and the equivalence ratio.<br/>