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[가솔린엔진부문] 냉시동시 미연 배기가스 점화 기술을 이용한 배기저감
조용석(Yongseok Cho),김충식(Choongsik Kim),최진욱(Jinwook Choi),천준영(Junyoung Chun),김인탁(Intak Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To alleviate the problems of air pollution caused by vehicles, many researchers are trying to develop new emission reduction technologies. In this study, UEGI technology was developed to help three way catalyst's fast light-off. A HC adsorber was applied to UEGI system to improve emission reduction perfo그ance of the system. Experimental results showed that closed-coupled catalyst's light-off time and HC and CO emissions are significantly more reduced by UEGI technology with the HC adsorber. There were 50.8% reduction of THC and 94.4% reduction of CO by the UEGI system, and 78.1% of THC and 96.6% of CO were reduced by the UEGI system with the HC adsorber
[가솔린엔진부문] UEGI 기술을 이용한 촉매온도제어에 관한 연구
조용석(Yongseok Cho),이윤석(Yunseok Lee),김충식(Choongsik Kim),최진욱(Jinwook Choi),천준영(Junyoung Chun) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Reduction of catalyst light-off time in the cold start period is crucial to reduce the HC and CO emissions and to meet the ULEV emission regulation. In this study, a new approach to solve this problem has been studied experimentally. The UEGI (Unburned Exhaust Gas Ignition) technology developed in this study ignites the unburned fuel-air mixture at the exhaust manifold to warmup a CCC (Close-coupled Catalytic Converter) during cold start. The experimental results showed that the UEGI technology can effectively shorten the catalyst light-off time and reduce the HC and CO emissions.
[가솔린엔진부문] 냉시동시 미연 배기가스 점화 기술이 촉매 온도 상승 및 분포에 미치는 영향
조용석(Yongseok Cho),엄인용(Inyong Ohm),김인탁(Intak Kim),김충식(Choongsik Kim),최진욱(Jinwook Choi),천준영(Junyoung Chun) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To make close-coupled catalytic converter (CCC) reach light-off temperature within a few seconds after cold-start, UEGI technology was developed to warm up the CCC. The unburned exhaust mixture is ignited by four glow plugs installed upstream of the catalyst. To verify the temperature rise effect by UEGI technology, CCC temperature distribution was measured with thermocouples. The results con finned that UEGI system makes easier for CCC to reach light-off temperature and shortens light-off time. The results also showed that UEGI system doesn't affect CCC temperature distribution so much, but the shape of exhaust manifold strongly affects the temperature distribution.