| 제목 |
1.0 T-GDI 차량의 NMOG+NOx 저감을 위한 촉매 변환기와 엔진 최적화에 따른 배출가스 특성연구 |
| 분야 |
연료 및 배기 |
| 언어 |
Korean |
| 저자 |
김락민(한국자동차연구원), 류경진(영남이공대학교) |
| Key Words |
NMOG(비 메탄 온실가스), Catalytic converter(촉매 변환기), Emission(배출가스), Catalyst heating(촉매예열), ECU |
| 초록 |
In cold start condition, the catalyst and engine control method of T-GDI engine vehicle have direct impact on NMOG(Non Methane Organic Gas) and NOx emission. Results of testing three types of catalysts with similar material properties showed that the two stage structure was more effective. However, NMOG and NOx emission from the exhaust gas using existing catalyst more than doubled compared to the SULEV30 regulation. In order to reduce the NMOG and NOx values, an improved specification catalyst with component adjustment was developed by which NOx could be reduced by 20 % compared to the exhaust gas before the catalyst activation proceeded in the cold starting process. CH(Catalyst Heating) mode control and engine intake/exhaust cam were adjusted to optimize engine control at cold start condition. In the case of the CH mode, the operating time was optimized, and the engine cam was adjusted to increase the initial exhaust temperature. The improved catalyst and optimized engine start-up emission reduced NOx by 48 % and HC by 65 %. |
| 원문(PDF) |
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