| 제목 |
디젤-천연가스 이종연료 예혼합압축착화 엔진에서 디젤 2단 분사를 통한 연소 개선 |
| 분야 |
엔진 및 연소 |
| 언어 |
Korean |
| 저자 |
김현수(한국과학기술원), 김우영(한국과학기술원), 배충식(한국과학기술원) |
| Key Words |
Dual-Fuel premixed charge compression ignition(이종연료 예혼합압축착화), Natural gas(천연가스), Diesel(디젤), Combusution efficiency(연소효율), Two-stage injection(2단 분사) |
| 초록 |
A two-stage diesel injection strategy in a diesel-natural gas dual-fuel premixed charge compression ignition(DF-PCCI) engine was investigated under a low load condition. Under this condition, the combustion efficiency becomes low because of the low equivalent ratio. This problem can be solved by supplying more diesel with low natural gas substitution rate(NGSR); however, thermal efficiency deteriorates as a result. As such, the two-stage diesel injection strategy was applied in order to delay the combustion phase at low NGSR of DF-PCCI. The two-stage injection timing was selected based on the thermal efficiency and combustion efficiency of single diesel injection at DF-PCCI combustion. By applying the two-stage diesel injection strategy, despite a slight decline of thermal efficiency, unburned hydrocarbon(UHC) and carbon monoxide(CO) were significantly reduced as compared with the single diesel injection strategy DF- PCCI. |
| 원문(PDF) |
다운로드
Journal Site
|
