◎ 논문제목(국문) : 가솔린 직분사 엔진에서 다단점화 방식이 화염 전파 및 연소 특성에 미치는 영향
◎ 논문제목(영문) : Effects of Multi-stage Ignition Strategy on Flame Propagation and Combustion Characteristics in Gasoline Direct Injection Engine
◎ 저 자 : 김지수, 이호승, 이강현, 송영석, 박성욱
◎ 논문정보 : 한국분무공학회지, Vol.29, No. 4, pp. 192-201
◎ 게재연월 : 2024-12
◎ 초 록 :
The characteristics of spark channel, flame propagation, and combustion of a commercial ignition coil and two multi-stage ignition coils were investigated using an optical engine that can visualize the inside of the cylinder and a single-cylinder metal engine. The multi-stage ignition coils contain two coils each and operate in two modes: simultaneous ignition of both coils (S-mode) and continuous ignition (C-mode). In the spark channel visualization experiments, the S-mode multi-stage ignition coil was most affected by the in-cylinder flow, and its channel area and length were smaller compared to other ignition coils. These spark channel characteristics influenced flame propagation and combustion, resulting in slower flame propagation and increased combustion instability as the excess air ratio increased. In contrast, the C-mode multi-stage ignition coil showed the longest ignition duration, with the largest channel area and length. As a result, under an excess air ratio of 1.8, it showed over 50% lower IMEP COV compared to the commercial ignition coil.
◎ 논문제목(국문) : 가솔린 직분사 엔진에서 다단점화 방식이 화염 전파 및 연소 특성에 미치는 영향
◎ 논문제목(영문) : Effects of Multi-stage Ignition Strategy on Flame Propagation and Combustion Characteristics in Gasoline Direct Injection Engine
◎ 저 자 : 김지수, 이호승, 이강현, 송영석, 박성욱
◎ 논문정보 : 한국분무공학회지, Vol.29, No. 4, pp. 192-201
◎ 게재연월 : 2024-12
◎ 초 록 :
The characteristics of spark channel, flame propagation, and combustion of a commercial ignition coil and two multi-stage ignition coils were investigated using an optical engine that can visualize the inside of the cylinder and a single-cylinder metal engine. The multi-stage ignition coils contain two coils each and operate in two modes: simultaneous ignition of both coils (S-mode) and continuous ignition (C-mode). In the spark channel visualization experiments, the S-mode multi-stage ignition coil was most affected by the in-cylinder flow, and its channel area and length were smaller compared to other ignition coils. These spark channel characteristics influenced flame propagation and combustion, resulting in slower flame propagation and increased combustion instability as the excess air ratio increased. In contrast, the C-mode multi-stage ignition coil showed the longest ignition duration, with the largest channel area and length. As a result, under an excess air ratio of 1.8, it showed over 50% lower IMEP COV compared to the commercial ignition coil.