직접분사 디젤엔진에서 연소실 형상에 따른 KL치의 변화에 관한 연구 = A Study on the KL Value with Combustion Chamber Shapes in D.I Diesel Engines

다국어 초록 (Multilingual Abstract)

The present study deals with the effect of combustion chamber shape on in-cylinder soot oxidation characteristics of a direct injection diesel engine. The analysed combustion chambers were a toroidal and a reentrant, a reentrant with a projection(Complex). The two-color method was used to measure in-cylinder flame temperature and KL value which is approximately proportional to the soot amount along the optical path. In addition, heat release rate was calculated from the in-cylinder pressure data. From this study, the soot oxidation of the reentrant and the complex which were strengthen squish flows went worse in late combustion period under heavy-load operation compared to that of the toroidal at retarded fuel injection timing. It might be cause of the flame holding that squish lip depress the outflow of flame from the bowl to the entire combustion space.

목차 (Table of Contents)

• 1.서론
• 2. 실험장치 및 방법
• 2.1 이색법 원리
• 2.2 실험장치 및 방법
• 3. 결과 및 토론
• 3.1 Toroidal 연소실의 연소특성
• 3.1.1 연소압력 특성
• 3.1.2 화염온도와 KL치 특성
• 3.2 Reentrant 연소실의 연소특성
• 3.2.1 연소압력 특성
• 3.2.2 화염온도와 KL치 특성
• 3.3 Complex 연소실의 연소특성
• 3.3.1 연소압력 특성
• 3.3.2 화염온도와 KL치
• 3.4 연소실 형상에 따른 예혼합연소 특성
• 3.5 연소실 형상에 따른 화염온도와 Soot 산화 특성
• 4. 결론