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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 鄭眞澤
- 발행연도
- 2014
- 저작권
- 고려대학교 논문은 저작권에 의해 보호받습니다.
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이 논문의 연구 히스토리 (6)
2015
2014
PFI Dual Injection 엔진의 연료 분사각도와 분무각에 따른 엔진 내부 유동 및 연료 거동 특성
이승엽
,
정진택
,
박영준
외 2명
한국자동차공학회 추계학술대회 및 전시회
2014.11
학술대회자료
MPI Dual Injection 엔진의 온도 조건 변화에 따른 엔진 내부 유동 및 연료 거동 특성에 관한 연구
이승엽
,
정진택
,
박영준
외 2명
한국자동차공학회논문집
2014.04
학술저널
듀얼 인젝터를 가진 PFI 엔진의 연료 분사시기와 온도 조건에 따른 내부 유동 및 연료 거동 특성
이승엽
機械工學科
2014.01
학위논문
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초록· 키워드
오류제보하기
The PFI dual injection engine can enhance the fuel efficiency, engine power and
exhaust emission performance at all engine operating range. The PFI dual
injection engine was developed for solving of the GDI engine cost problem. By
using one injector per one intake port, PFI dual injection engine has an excellent
fuel atomization and targeting injection.
As a basic research for the PFI Dual injection engine design, this research was
investigated in order to understand the characteristic of the in-cylinder flow and
fuel behavior with respect to the fuel injection parameters (fuel injection timing
and fuel type) and engine temperature condition in the PFI dual injection.
The 3D unsteady CFD simulation of the PFI Dual injection engine was
performed using STAR-CD. The moving mesh according to the crank angle was
made by using ES-ICE. The engine operating condition was 2,000rpm / WOT. The
boundary conditions were determined through experiments. The parameters for
this study were nine injection timing, two fuel types and two wall temperatures.
The injection timing parameters were divided into three types such as the closed
intake valve, open intake valve and combined injection timing.
This paper discussed on the in-cylinder flow and fuel behavior characteristics.
As a result, the intake air amount, evaporated fuel in the cylinder and the fuel
film on the wall were shown according to parameters that depend on the fuel
injection method and engine wall temperature. Also, the results were influenced
by in-cylinder flow such as the intake flow, back flow and so on.
exhaust emission performance at all engine operating range. The PFI dual
injection engine was developed for solving of the GDI engine cost problem. By
using one injector per one intake port, PFI dual injection engine has an excellent
fuel atomization and targeting injection.
As a basic research for the PFI Dual injection engine design, this research was
investigated in order to understand the characteristic of the in-cylinder flow and
fuel behavior with respect to the fuel injection parameters (fuel injection timing
and fuel type) and engine temperature condition in the PFI dual injection.
The 3D unsteady CFD simulation of the PFI Dual injection engine was
performed using STAR-CD. The moving mesh according to the crank angle was
made by using ES-ICE. The engine operating condition was 2,000rpm / WOT. The
boundary conditions were determined through experiments. The parameters for
this study were nine injection timing, two fuel types and two wall temperatures.
The injection timing parameters were divided into three types such as the closed
intake valve, open intake valve and combined injection timing.
This paper discussed on the in-cylinder flow and fuel behavior characteristics.
As a result, the intake air amount, evaporated fuel in the cylinder and the fuel
film on the wall were shown according to parameters that depend on the fuel
injection method and engine wall temperature. Also, the results were influenced
by in-cylinder flow such as the intake flow, back flow and so on.
목차
목 차목 차 ································································ iiList of Figures ······················································ ivList of Table ························································ xNomenclature ························································ xi제 1장 서 론 ························································· 11. 1 연구 배경 ················································ 11. 2 관련 연구 동향 ··········································· 71. 3 연구 목적 ················································· 9제 2장 연구 방법 ···················································· 102. 1 실린더 내부 유동의 지배방정식 ······················· 102. 1. 1 기체상 지배방정식 ································ 102. 1. 2 액체상 지배방정식 ································ 152. 1. 3 연료 액막 지배방정식 ···························· 162. 2 전산해석 방법 ··········································· 182. 2. 1 격자계 생성 ········································ 182. 2. 2 운전 및 해석 조건 ································ 222. 2. 3 수치해법 및 모델 설정 ··························· 242. 3 해석 변수 ················································· 24제 3장 결과 및 고찰 ················································ 273. 1 흡기 밸브가 닫혀있는 동안의 연료 분사 ··············· 273. 1. 1 흡기 밸브가 닫혀있는 시기의 연료분사의 기본 특성··············· 283. 1. 2 분사 타이밍과 연료 종류 및 벽면온도의 효과················ 383. 2 흡기 밸브가 열려있는 동안의 연료 분사 ··············· 473. 2. 1 흡기 밸브가 열려있는 시기의 연료분사의 기본 특성··············· 483. 2. 2 분사 타이밍과 연료 종류 및 벽면온도의 효과················ 573. 3 밸브 닫힘 / 열림 중첩 동안의 연료 분사 ················· 653. 3. 1 밸브 닫힘 / 열림 중첩 시기의 연료분사의 기본 특성·············· 663. 2. 2 분사 타이밍과 연료 종류 및 벽면온도의 효과················ 71제 4장 결 론 ······························································ 79참 고 문 헌 ································································ 81
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