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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2012.11
- 수록면
- 315 - 319 (5page)
이용수
초록· 키워드
오류제보하기
In internal combustion engines, Gasoline Direct Injection (GDI) is a variant of fuel injection employed in modern gasoline engines. The major advantages of a GDI engine are high fuel efficiency and high power output. In this system, gasoline is highly pressurized, and injected via a fuel rail directly into the combustion chamber of each cylinder. A high pressure fuel pump is used for positive injection into a very high pressure environment around 200 MPa or more, thus the interior flow characteristics are very complicated. It is important to study the flow characteristics for improving the design of the pump.
In this paper, it is focused on what happens when high pressure occurs at various crank speed. To analyze the dynamic flow characteristics in the pump, the movements of the valves and a piston are simulated by use of FLUENT, a commercial CFD code. The simulated section of model is from the outlet check valve opening to the piston reaching at top dead center.
According to the result, the mass flow rate of discharged flow to the fuel rail is increased in proportion to the cam speed. The pressure at the front area of PRV decreased slightly according to the increasing cam speed. The maximum pressure difference of the front area of PRV and inside a piston cylinder is a very small value of 40 Pa.
In this paper, it is focused on what happens when high pressure occurs at various crank speed. To analyze the dynamic flow characteristics in the pump, the movements of the valves and a piston are simulated by use of FLUENT, a commercial CFD code. The simulated section of model is from the outlet check valve opening to the piston reaching at top dead center.
According to the result, the mass flow rate of discharged flow to the fuel rail is increased in proportion to the cam speed. The pressure at the front area of PRV decreased slightly according to the increasing cam speed. The maximum pressure difference of the front area of PRV and inside a piston cylinder is a very small value of 40 Pa.
목차
Abstract
1. 서론
2. 해석 모델 및 방법
3. 해석 결과
4. 결론
References
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