저온활성촉매 변환기의 체적변화가 활성화 성능에 미치는 영향에 관한 수치적 연구
- Title
- 저온활성촉매 변환기의 체적변화가 활성화 성능에 미치는 영향에 관한 수치적 연구
- Other Titles
- Numerical Study on the Effect of Volume Change of Light-Off Catalyst on Light-Off Performance
- Author
- 김우승
- Keywords
- 저온활성 촉매(Light-off catalyst); 냉간시동(Cold start); 활성개시 온도(Light-off temperature); 화학반응(Chemical reaction); 바닥밑 촉매(Under-body catalyst)
- Issue Date
- 2000-06
- Publisher
- 한국자동차공학회
- Citation
- 한국자동차공학회논문집, v. 8, no. 6, page. 87-100
- Abstract
- HC and CO emissions during the cold start contribute the majority of the total emissions in the legislated driving cycles. Therefore, in order to minimize the cold-start emissions, the fast light-off techniques have been developed and presented in the literature. One of the most encouraging strategies for reducing start-up emissions is to place the light-off catalyst, in addition to the main under-body catalyst, near the engine exhaust manifold. This study numerically considers three-dimensional, unsteady compressible reacting flow in the light-off and under body catalyst to examine the impact of a light-off catalyst on thermal response of the under body catalyst and tail pipe emission. The effects of flow distribution on the temperature distribution and emission performance have also been examined. The present results show that flow distribution has a great influence on the temperature distribution in the monolith at the early stage of warm-up process and the ultimate conversion efficiency of light-ofT catalyst is severely deteriorated when the space velocity is above 100,000 h fl.
- URI
- https://www.dbpia.co.kr/journal/articleDetail?nodeId=NODE00524883?https://repository.hanyang.ac.kr/handle/20.500.11754/161672
- ISSN
- 1225-6382; 2234-0149
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML