표제지
감사의 글
목차
ABSTRACT 8
Ⅰ. 서론 10
1.1. 연구배경 10
1.2. 국내·외 연구동향 15
1.3. 연구목적 17
Ⅱ. 실험장치 및 방법 19
2.1. 실험장치 19
2.2. 물 분사식 매연제거장치 24
2.3. 흡입 혼합기 가열장치 27
2.4. 실험방법 28
Ⅲ. 실험 결과 및 고찰 31
3.1. 흡입산소농도 31
3.2. 배기산소농도 37
3.2. 배기산소농도 42
Ⅳ. 결론 46
참고문헌 50
Table 1. Emission standards of heavy-duty diesel engines in Korea, USA, EU and Japan 14
Table 2. Specification of test engine 19
Fig. 1. Schematic of experimental apparatus for a test engine 21
Fig. 2. Cross-section of a diesel soot-removal system with a cylinder type scrubber 25
Fig. 3. Heating system of intake mixture 27
Fig. 4. Full load characteristics of experimental engine 30
Fig. 5. Correlation between intake mixture temperature and intake oxygen concentration as parameters of engine load and EGR rate at an engine speed of 2800 rpm 34
Fig. 6. Effect of intake oxygen concentration(with EGR/without EGR) on NOx emissions 35
Fig. 7. Effect of intake oxygen concentration(with EGR/without EGR) on soot emissions 36
Fig. 8. Correlation between intake mixture temperature and exhaust oxygen concentration as parameters of engine load and EGR rate at an engine speed of 2800 rpm 39
Fig. 9. Effect of exhaust oxygen concentration(with EGR/without EGR) on NOx emissions 40
Fig. 10. Effect of exhaust oxygen concentration(with EGR /without EGR) on soot emissions 41
Fig. 11. Effect of equivalence ratio on NOx emissions 44
Fig. 12. Effect of equivalence ratio on soot emissions 45
Photo. 1. Dynamometer controller and data acquisition system 22
Photo. 2. Test apparatus 22
Photo. 3. Exhaust gas analyzers 23
Photo. 4. Picture of a diesel soot-removal system with a cylinder type scrubber 26