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채재우(J.O.Chae),이상만(S.M.Lee),박재근(J.K.Park),문승일(S.I.Moon),정영식(Y.S.Jeong),Alexander A. Martychenko(Alexander A. Martychenko) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
Misfire in a cylinder of an Internal Combustion Engine (ICE) causes such problems as high poisonous exhaust gases, catalytic converter overload, noise, vibration, etc The operation regimes where misfire is most likely to occure are idling, acceleration and deceleration. Our system of misfire diagnostics is based on using a spark-plug as a sensor for detecting misfire. Rather a high bias voltage applied between its electrodes generates a corona discharge. The current and voltage drop on this discharge depend on the pressure and temperature between spark-plug electrodes in cylinders. Development of misfire detection system is introduced in this paper. Such a simple sensor as a spark-plug can be widely used for misfire detection.
직접분사식 디젤엔진에서의 공해저감을 위한 전자분사 시스템에 관한 실험적 연구
채재우(J. O. Chae),정영식(Y. S. Jung),양준석(J. S. Yang),황재원(J. W. Hwang),Alexander A. Martychenko(Alexander A. Martychenko) 한국자동차공학회 1997 한국 자동차공학회논문집 Vol.5 No.1
The pump-pipe-injector system is that most commonly used type of injection equipment for diesel engines. In this study, a new electromagnetic fuel injection system was designed and carried out the experiment of single cylinder direct injection(DI) diesel engine. This system do not need the earn shaft for fuel injection. The effects of the injection timing on the combustion process and and emission were investigated. The results are that 1) atomization was improved, 2) combustion pressure was increased and ignition delay became shorter than before, 3) Low smoke level guar-antee with more advanced injection timing without abnormal combustion but NOx concentration was increased as the injection time advanced.