Multi-cavity Piston에 의한 디젤기관의 연소성 향상에 관한 연구
The Study for Improving the Combustion in a D.I. Diesel Engine using Multi-cavity Piston
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The performance of a direct-injection diesel engine often depends on the strength of swirl or squish, the shape of combustion chamber, the number of nozzle holes, etc. This is natural because the combustion in the cylinder was affected by the mixture formation process. Since the available duration to make the mixture formation of air-fuel is very short, it is difficult to make complete mixture. Therefore, an early stage of combustion is violent, which leads to the weakness of noise and vibration. In this paper, the combustion process of a common- rail diesel engine was studied by employing two kinds of pistons. One has several cavities on the piston crown to intensify the squish during the compression stroke in order to improve the atomization of fuel, we call this multi cavity piston in this paper. The other is a toroidal single cavity piston, generally used in high speed diesel engines. To take photographs of flame and flaming duration, a four-stroke diesel engine was remodeled into a two-stroke visible single cylinder engine and a high speed video camera was used.
Abstract
The performance of a direct-injection diesel engine often depends on the strength of swirl or squish, the shape of combustion chamber, the number of nozzle holes, etc. This is natural because the combustion in the cylinder was affected by the mixture formation process. Since the available duration to make the mixture formation of air-fuel is very short, it is difficult to make complete mixture. Therefore, an early stage of combustion is violent, which leads to the weakness of noise and vibration. In this paper, the combustion process of a common- rail diesel engine was studied by employing two kinds of pistons. One has several cavities on the piston crown to intensify the squish during the compression stroke in order to improve the atomization of fuel, we call this multi cavity piston in this paper. The other is a toroidal single cavity piston, generally used in high speed diesel engines. To take photographs of flame and flaming duration, a four-stroke diesel engine was remodeled into a two-stroke visible single cylinder engine and a high speed video camera was used.
참고문헌 (13)
- 한용택, "가시화 엔진을 이용한 직분식 디젤엔진내의 유동장 측정에 관한 연구", 한국자동차공학회 논문집, 14(1), pp.129~137 (2006), 한국자동차공학회
- 윤준규, "흡기 선회유동 및 연소인자가 V8형 TCI 디젤엔진의 성능 및 배출가스특성에 미치는 영향", 한국자동차공학회 논문집, 13(4), pp.135~144 (2005), 한국자동차공학회
- 이기형, "직접분사식 소형 디젤엔진의 실린더내 스월 유동장에 미치는 흡기포트의 형상에 관한 연구", 한국자동차공학회 논문집, 12(6), pp.38~45 (2004), 한국자동차공학회
- 정재우, "SCV에 의한 스월 유동이 직분식 디젤엔진의 연소에 미치는 영향에 관한 연구", 한국자동차공학회 논문집, 10(2), pp.31~39 (2002), 한국자동차공학회
- J. K. Lee., "An Experimental Study on the Characteristics of the In-Cylinder Eccentricity Swril Flow with Intake Port Shapes in a 4 Valve Diesel Engine", Transactions of KSAE, 6(1), pp.59~72 (1998)
- K. S. Jeong, "An experimental Study of In-Cylinder Flow Characteristics of a High speed Direct Injection Diesel Engine", Transactions of KSAE, 4(3), pp.22~30 (1996)
- Effects of Combustion and Orientation of Intake Port on Swirl Motion in Four-Valve D. I. Diesel Engine, "Yufeng Li.", ~, pp.SAE paper 2000-01-1823 (2000)
- The Influence of Swirl on HSDI Diesel Combustion at Moderate Speed and Load, "Paul C. Miles", ~, pp.SAE paper 2000-01-1829 (2000)
- S. S. Lee., "In fluence of Cavity Geometry on Combustion Characteristics and Particulate in D. I. Diesel Engine", Journal of the KSAE, 12(6), pp.40~47 (1990)
- S. I. Kwon, "Effects of Reentrant Type Bowl Geometry on Combustion Characteristics in a D. I. Diesel Engine", KSAE Spring Conference Proceeding, pp.125~132 (1994)
- S. I. Kwon, "Effect of Re-entrant Type Bowl Geometry on Combustion Characteristics in Diesel Engine", Transactions of KSAE, 3(3), pp.37~45 (1995)
- 방중철, "Swirl Groove Piston에 의한 커먼레일 디젤기관의 연소성 향상에 관한 고찰", 한국자동차공학회 논문집, 18(6), pp.145~151 (2010), 한국자동차공학회
- 방중철, "Swirl Groove Piston에 의한 바이오 디젤연료의 연소과정에 관한 연구", 한국자동차공학회 논문집, 17(1), pp.105~113 (2009), 한국자동차공학회