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소형 2행정 엔진에서의 개선된 디지털 콘덴서 점화 방식 적용에 관한 연구
갈한주(H.J.Kal),Ke Zeng(Ke Zeng),박재근(J.K.Park),황재원(J.W.Hwang),채재우(J.O.Chae),정영식(Y.S.Jeong) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
A Digital CDI(Capacitor Discharge Ignition) device is developed in this paper. This CDI. which has a micro-controller as its kernel. can have more flexible spark timing with engine speed than the conventional CDI used in most motorcycle engines owing to its programmable characteristics.<br/> The principle of this digital CDI and the design of hardware and software are presented in this pater. Engine test with this CDI is carried out to optimize engine performance. Also comparison between conventional CDI and digital CDI is carried out.<br/> The results shows that this digital CDI can provide a better spark timing than the conventional CDI. Tests of part load(30% throttling position) and full load(100% throttling position) show that the engine power is increased around 10-20% and fuel consumption is decreased around 10-20% simultaneously.<br/> As this dinital CDI has simple structure, low cost and very little modification are required. It is a promising substitute for the widely used conventional CDI.<br/>
차정은(Cha, Jung-Eun),전희권(Jun, Hee-Kwon),박정주(Park, Jung-Joo),고윤택(Ko, Youn-Taek),황정태(Hwang, Jung-Tae),장원철(Chang, Won-Chol),김진영(Kim, Jin-Young),김태원(Kim, Tae-Won),김인기(Kim, In-Ki),정영식(Jeong, Young-Sik),갈한주(K 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
To extract hydrogen for stack, fuels such as LPG and LNG were reformed in the fuel processor, which is comprised of desulfurizer, reformer, shift converter, CO remover and steam generator. All elements of fuel processor are integrated in a single package. Highly active catalysts (desulfurizing adsorbent, reforming catalyst, CO shift catalyst, CO removal catalyst) and the various burners were developed and evaluated in this study. The performance of the developed catalysts and the commercial ones was similar. 1 kW, 5 kW class fuel processor systems using the developed catalyst and burner showed efficiency of 75 %(LHV, for LNG). The start-up time of the 1 kW class fuel processor was less than 50 minutes and its volume including insulation was about 30 l. The start-up time of 3 kW and 5 kW class fuel processors with the volume of 90 l and 150 l, respectively, was about 60 minutes. In the case of LPG fuel, efficiency, volume and start-up time of 1kW class fuel processor showed 73 %(LHV), < 60 l and < 60 min, respectively. Advanced fuel processor showed more highly efficiency and shorter start-up time due to the improvement of heat exchanger and operating method. 1 kW and 3 kW class fuel processors have been evaluated for reliability and durability including with on/off test of developed catalysts and burner.