| 제목 |
중앙 분사방식의 직분식 가솔린 기관에서 연료 혼합기 형성에 미치는 분사시기와 캐비티 형상의 영향 |
| 분야 |
열유체 및 공조시스템(HVAC) |
| 언어 |
Korean |
| 저자 |
김태안(부산대학교), 김덕줄(부산대학교), 강정중(부산대학교) |
| Key Words |
Optically accessible engine(가시화 엔진), Exciplex fluorescence method(Exciplex 형광법), DI gasoline engine(직분식 가솔린 엔진), Swirl flow(선회유동), Homogeneous mixture(균일혼합) |
| 초록 |
This study was performed to investigate the behavior of liquid and vapor phase of fuel mixtures with different piston cavity diameters in a optically accessible engine. The conventional engine was modified as Central Injected DI gasoline engine with swirl motion. Two dimensional spray fluorescence images of liquid and vapor phase were acquired to analyze spray behavior and fuel distribution inside of cylinder using exciplex fluorescence method. Piston cavity geometries were set by Type S, M and L. The results obtained are as follows. In the spray formation after SOI, the cone angle and width of the spray were decreased at late injection timing. With a fuel injection timing of BTDC 180° fuel was not greatly affected in a piston cavity but generally distributed as homogeneous mixture in the cylinder. With a fuel injection timings of BTDC 90° and 60° fuel mixture was widely distributed in near the cavity center. As a injection timing was late in the compression stroke, residual width of fuel mixture was narrow in proportion to piston cavity.{{br}} |
| 원문(PDF) |
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