| 제목 |
체적효율을 고려한 가변밸브 개폐시기의 조정에 의한 실린더내 잔류가스량에 관한 연구 |
| 분야 |
엔진 및 연소 |
| 언어 |
Korean |
| 저자 |
남정길(목포해양대학교) |
| Key Words |
Internal EGR(내부 배기가스재순환장치), Volumetric efficiency(체적효율), Method of characteristics(특성곡선법), Residual gas fraction(잔류가스량) |
| 초록 |
The EGR is needed for one of various strategies to reduce NOx emission. But to get the proper EGR rate, the intake and exhaust system become complicated. That is n reason why we consider using the internal EGR system. The internal EGR is a system which reduces NOx by eontroling the residual gas fraction in cylinder by changing valve timing and valve lift of intake and exhaust. In this paper. characteristics of volumetric efficiency and residual gas fraction in cylinder were investigated for various engine speeds by changing valve timing and valve lift of intake and exhaust in the 4 stroke-cycle diesel engine. Volumetric efficiency and residual gas fraction were calculated by the method of characteristics. As the results, residual gas fraction and volumetric efficiency in cylinder by variable valve timing were visualized. |
| 원문(PDF) |
다운로드
|
