| 제목 |
가솔린 직접 분사식 엔진에서의 실린더 내 화염 거동과 입자배출물 특성 |
| 분야 |
엔진 및 연소 |
| 언어 |
Korean |
| 저자 |
김태훈(서울과학기술대학교), 전준호(부경대학교) |
| Key Words |
Gasoline direct injection(가솔린 직접 분사식 엔진), Particulate matter(입자성물질), Flame luminosity(화염강도), Lean combustion(희박연소), Stoichiometric combustion(이론공연비 연소), Particulate size distribution(입자크기분포) |
| 초록 |
Since gasoline direct injection(GDI) engines have the advantages of improved compression-ratio and high performance, the usage of GDI engines has been increased worldwide. Lean burn from GDI engines improves fuel economy; however, high engine-out particle number(PN) and mass(PM) have been issued from GDI engines. In this study, engine-out PN and PM were experimentally investigated from a GDI engine operating in lean and stoichiometric combustion modes with in-cylinder spatiotemporal flame luminosity. A multi-channel optical sensor was used to measure the flame characteristics in the combustion chamber during the combustion process. Lean combustion mode can achieve 10 % less fuel consumption and stable operation under high load and speed. Lean mode shows one-tenth particle mass concentration compared to stoichiometric mode even with strong diffusion flame propagations. The source of large particles(> 50 nm) is highly related to the mixture formation and combustion process, whereas the small particles come from other sources. |
| 원문(PDF) |
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