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배상수(S.S. Pae),임병진(B.J. Lim),임인건(I.K. Lim),박종범(J.B. Park),김응서(E.S. Kim) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_1
This paper presents the characteristics of the crankshaft speed fluctuations. To do this, the speed waveforms were measured both at the flywheel and the front end of the engine. The speed waveform measured at the flywheel shows better result than at the front end one, because of the torsionai vibration and the auxiliary components. And the patterns of the speed fluctuations are classified into three region, such as low load, middle load and high load region with the variations of the loads. Additionally, as the engine speeds increase and the loads decrease, the analysis of the speed becomes more difficult due to the lower variation of the speed. And in all the regions, the main frequency component of the speed fluctuation is firing frequency.<br/>
크랭크축 각속도의 변동을 이용한 실화 판정(2)-실차 실험-
배상수(S.S.Pae),남하욱(B.J.Lim),김세웅(S.W.Kim),김응서(E.S.Kim) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
To keep up with the regulation of OBD Ⅱ ( on board diagnostics Ⅱ ). many detection methods have been developed. Among them. the method of using the crankshaft speed fluctuation is most noticeable in the point of<br/> view of lower cost and easily-equipped charateristics. On the basis of the results obtained by the experiment of the engine and dynamometer. the integrating torque index (ITI) has been introduced.<br/> In this research, the instrumental and the interfacing systems to engine control unit ( ECU ) are developed for the vehicle test. So the vehicle and chassy-dynamometer test can be carried out in addition to the rough road test.<br/> From this test. the method proposed before proved to be applicable to the real vehicle<br/>
간접 분사식 디젤 기관에서 메탄올/경유 Dual 연료에 의한 성능 및 배출물 특성에 관한 연구
김종우(J.W. Kim),배상수(S.S. Pae),이상준(S.J. Lee),김유광(Y.K. Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
This paper presents the characteristics of the performance and the emissions of indirect diesel engine by using the dual fuel, which is composed of the methanol and the diesel. To do this, fumigation and mixing injection method were applied respectively, and compared with each other. In additions, the intake air temperature were varied from the ambient temperature to 50 "C in order to investigate the effects of the higher latent heat of methanol. In fumigation, the<br/> air assisted injection assembly are used to accelerate the atomization of methanol. As a results, the load are the main factor to limit the mixing ratio, so fumigation is better than the mixing injection, because of controlling the mixing ration in proportional to the load.<br/>