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이종숭(J.S.Lee),김진영(J.Y.Kim),이상무(S.M.Lee),이중순(J.S.Lee),정성식(S.S.Chung),하종률(J.Y.Ha) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
It is a necessary condition to control the precise air-fuel ratio with real time for the stability of lean burn including transient operating condition as well as other factors as flow of mixture and ignition energy in SI engine.<br/> This study aims to development of software and hardware such as the engine control system and interface. Real time control system is introduced and its characteristics are tested in SI engine. The real time control system was applied to SI engine and the results are shown.<br/>
이종숭(J.S.Lee),정용윤(Y.Y.Chung),이중순(J.S.Lee),하종률(J.Y.Ha) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
In a SI engine, it is necessary to control fuel quantity in accordance with intake air amount in order to reduce exhaust emission and improve the specific fuel consumption. Precise AFR control requires measurement of air amount with respect to the cylinder and injection fuel according to the air amount. In this paper, we applied nonlinear fuel injection model, and developed the algorithm of AFR control. This algorithm includes the methods of measurement of transient air mass flowing into each cylinder, of calculation of injection pulse width for measured air mass, and the method of feedback and estimation control by using lambda sensor. Also we developed control program for IBM-PC by using C++ Builder, and tested it in the commercial engine. The results we have got from the work better than those of the commercial ECU.<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/>
이종숭(J.S.Lee),김진영(J.Y.Kim),이중순(J.S.Lee),정성식(S.S.Chong),하종률(J.Y.Ha) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
In the spark ignition engine, the amount of the electronic control parts increase so that the harmful exhaust gas can be reduced and the thermal efficiency of the engine can be enhanced. ECU(Electronic Control Unit) can control better when sensors which are mounted on the engine are converted into the electrical signal and processed to the optimum condition for the engine control. This study aims at the development and the improvement of the signal measuring and the signal processing for the electronic control in the SI engine. We can get the algorithm of the measurement within 1° of the crank angle, and as a result we can control the function of the engine more precisely such the duration of the fuel injection and the timing of the spark ignition.<br/>
LBT 연소를 통한 Idling 운전시의 연소안정성 평가
이중순(J.S.Lee),이종숭(J.S.Lee),김진영(J.Y.Kim),하종률(S.S.Chung) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
It is necessary to discuss lightening engine parts and reducing the friction of sliding parts to improve fuel consumption and combustion stability at idling. Lean best torque combustion which produce maximum power at a lean air-fuel ratio is effective for the reduction of exhaust gas emission and the improvement of fuel consumption.<br/> Accordingly, this study deals with the expansion of lean combustible limitation, the combustion stability and the reduction of idle speed through the analysis of combustion characteristics on the base of the control technique of air-fuel ratio precisely because it does not need to maximum power at idling. The more ISC duty ratio is increased, the more idle speed is increased. On the other hand, the idle speed is decreased by leaning air-fuel ratio. The COV in engine speed is stable within maximum two percent up to 17.6 mixture ratio by the control of ISC duty ratio.
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/>
혼합기 유동 특성과 점화에너지 해석을 통한 신점화시스템 설계
김진영(J.Y.Kim),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.11_1
The combustion process of spark-ignition engine takes places in a turbulent flow field has been influenced by the flow characteristics of mixture and discharge energy. Experiments were carried out with parameters such as the shape of swirl control valves. discharge pattern and distribution of ignition energy.<br/> This study aims to development of ignition system by analysis of flow characteristics of mixture flow in an engine and ignition energy for enhancement of the ignitability of lean mixture.<br/>
[디젤엔진] 디젤엔진에서 soot 계측을 위한 레이저시트광의 적용
박태기(T.G. Park),이면준(M.J. Lee),이종숭(J.S. Lee),이중순(J.S. Lee),하종률(J.Y.Ha),정성식(S.S. Chung) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently the laser sheet technique has been developed to improve our limited understanding of the in-cylinder diesel combustion. The technique is capable of high temporal and spatial resolution, so that it is proved to be an adequate combustion diagnostics to finding out exhaust emission formation. These temporal and spatial sequences of LIS(Laser Induced Scattering), LII(Laser Induced Incandescence) images were made which show the extent of the soot distribution within the optically accessible diesel engine. And LIS, LII signal images of soot distribution provide new insight into where and when soot occurs in a diesel engine.