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김종우(J. W. Kim),김현규(H. k. kim),박호준(H. J. Park),전충환(C. H. Joen),장영준(Y. J. Chang) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
To diagnosis the complexible diesel fuel combustion processes and spray characteristics, many simplified injection systems are developed and used. Especially it is very popular that the solenoid servo valve use to control the fuel providing from injection pump to injector, but this system cause some problems, one of them is that makes a unsteady motion of needle when operating time is not enough. In this study, to clarify the effect of this unsteady motion of needle was measured by the injection rate and spray characteristics with using needle lift sensor.<br/>
김주영(J.Y.Kim),최수진(S.J.Choi),전충환(C.H.Joen),장영준(Y.J.Chang),주영철(Y.C.Joo) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
A combustion flame visualization system, for use as an engine diagnostics tool, was developed in order to evaluate combustion chamber shapes in the development stage of mass-produced S.I. engine. The system consist of an image converter camera and a computer-aided image processing system.<br/> By using this system, flame structure estimated from the brightness level on a image and direction of flame propagation in a single cylinder gasoline engine were measured. The flame propagation in a single cylinder gasoline engine has been measured through a I-CCD camera to understand combustion phenomena.<br/> The results showed that the. flame in the initial stage seemed to be blue flame, luminous flame in the end stage. Most of images, the flame propagation was occurred rapidly in the direction of exhaust port, while it was observed smooth flame propagation in the direction of intake port.<br/>
단기통 가솔린 엔진을 이용한 연소가시화(연속화상을 이용한 연소해석)
김주영(J.Y.Kim),최수진(S.J.Choi),전충환(C.H.Joen),장영준(Y.J.Chang),주영철(Y.C.Joo) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
A combustion flame visualization system, for use as an engine diagnostics tool, was developed in order to understand the combustion reaction mechanism in the development stage of mass-produced S.I. engine. The measurement system consists of a still camera, a high speed camera and a computer-aided image processing system. The high speed camera system is capable of high speed photography up to 5000 fps.<br/> By using this system, flame structure estimated from the greylevel on acquired image and direction of flame propagation(shape of flame) in a single cylinder gasoline engine has been measured through the still camera and the high speed camera to understand combustion phemonena.<br/> There is a correlation between the air flow motion(swirl) and flame during combustion cycle. resulting in faster flame development to face exhaust valve.<br/>