이중 분사 적용에 따른 단기통 디젤엔진의 연소특성에 관한 연구

• Published in: 한국연소학회지 Vol. 22; no. 1; pp. 1 - 7
• Main Authors: 이종태(Jong-Tae Lee), 신달호(Dalho Shin), 김형준(Hyung Jun Kim), 윤창완(Chang-Wan Yun), 김정수(Jeong-Soo Kim), 박수한(Suhan Park)
• Format: Journal Article
• Language: Korean
• Published: 한국연소학회 2017
• Subjects: 기계공학; Rate of Heat Release (ROHR); Double injection; Ignition delay; Brake Specific Fuel Consumption (BSFC)
• ISSN: 1226-0959; 2466-2089
• DOI: 10.15231/jksc.2017.22.1.001

This paper presents an experimental study on the effect of double injection strategies on combustion characteristics in a single-cylinder diesel engine. These studies are applied to the double injection strategies, such as $2^{nd}$ injection timing variations with fixed injection interval (8 degree) and variations of injection pressures with fixed injection timing and intervals. The injection quantity was 7 + 7 mg for double injections, and 14 mg for single injection. When the injection pressure was increased, the ignition delay was shortened, and the ISFC (indicated specific fuel consumption) was increased due to the fast termination of combustion by the shortened energizing duration. In addition, the retardation of injection timings toward TDC (top dead center) caused the reduction of ignition delay and the decrease of ISFC with the decrease of FMEP (friction mean effective pressure).