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과급 디젤엔진에서 선회비 변경에 따른 흡기 포트유동 및 엔진성능 특성에 관한 연구
윤준규,차경옥,Yoon, Jun-Kyu,Cha, Kyung-Ok 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.9
The characteristics of intake port flow and engine performance with swirl ratio variance in a turbocharged D.I. diesel engine were studied in this paper. The intake port flow is important factor which have influence on the engine performance and exhaust emission because the properties in the injected fuel depend on the combustion characteristics. Through these experiments it can be expected to satisfy performance and emission by optimizing the main parameters; the swirl ratio of intake port, injection timing and compression ratio. The swirl ratio for ports was modified by hand-working and measured by impulse swirl meter. For the effects on performance and emission, the brake torque and brake specific fuel consumption were measured by engine dynamometer, NOx and smoke were measured by gas analyzer and smoke meter. The results of steady flow test are as follows; as the valve eccentricity ratio are closed to cylinder wall, the flow coefficient and swirl intensity are increased. Also we realized that there is a trade-off that the increase of swirl ratio decreases mean flow coefficient and increases the Gulf factor. And the optimum parameters to meet performance and emission through engine test are as follows; the swirl ratio 2.43, injection timing BTDC 13oCA and compression ratio 15.5.
V8형 TCI 디젤기관의 배출가스저감 및 성능개선에 관한 연구
윤준규,임종한,Yoon Jun-Kyu,Lim Jong-Han 한국마린엔지니어링학회 2005 한국마린엔지니어링학회지 Vol.29 No.4
The purpose of this study is experimentally to analyze the effects of intake port swirl, injection system and turbocharger on the engine performance and the emission characteristics in a V8 type turbocharger intercooler D.I. diesel engine of the displacement 16.7L, and to suggest the improvement of engine performance. Generally to enhance engine power, TCI diesel engine is put to practically use turbocharged intercooler in order to increase volume efficiency which is cooled boost air. As results of considering the factors of the intake port of swirl ratio 2.25, compression ratio 17.5. re-entrant $8.5^{\circ}$ combustion bowl, nozzle hole diameter ${\phi}0.33{\ast}3+{\phi}0.35{\ast}2$. nozzle protrusion 3.18mm, injection timing BTDC $12^{\circ}CA$ and turbocharger(compressor 0.6A/R+46Trim. turbine 1.0 A/R+57Trim) is the best in the full load in the engine performance and the exhaust characteristics of NOx concentration. Therefore. their factors are appropriated as intake system, injection and turbocharger system.
[디젤엔진부문] 터보과급 디젤엔진의 성능 및 배기가스특성에 관한 연구
윤준규(Junkyu Yoon),차경옥(Kyungok Cha) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The characteristics of performance and exhaust emission in a turbocharged D.I. diesel engine was studied experimentally in this paper. The system of intake port, fuel injection and turbocharger are very important factors which have influence on the engine performance and exhaust emission because the properties in the injected fuel depend on the combustion characteristics.<br/> The optimum results which is tested as available parameters for better performance and emission are as follows; the swirl ratio is 2.43, injection timing is BTDC 13' CA, compression ratio is 16, combustion bowl is re-entrant 5' , nozzle hole diameter is ?? 0.28*6, turbocharger is GT40 model which are compressor A/R 0.58 and turbine A/R 1.19.<br/>
[디젤엔진부문] 흡기유동 및 연료분사계가 과급식 디젤엔진의 성능에 미치는 영향에 관한 연구
윤준규(Junkyu Yoon),이준서(Jooseo Lee),차경옥(Kyungok Cha) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_1
The effects of intake port flow and fuel injection system on the performance of turbocharged 01 diesel engine was studied in this paper. Intake flow and fuel injection system are important factors which have influence on the engine performance and exhaust emission because the properties in the injected fuel depend on the atomization characteristics. Through these experiments its can be expected to meet performance and emission by optimizing the parameters; the swirl ratio of intake port, injection timing, compression ratio, nozzle hole diameter, and so on. The swirl ratio for ports was modified by hand-working and measured by impulse swirl meter. For the effects on performance and emission, the brake torque, BSFC were measured by engine dynamometer and NOx, smoke were measured by gas analyzer and smoke meter.<br/> The optimum results which is tested as available parameters for better performance and emission are as follows; the swirl ratio is 2.43, injection timing is BTOC 13' CA, compression ratio is 15.5, nozzle holder spring is 2 stage, nozzle hole diameter is Φ 0.31*5<br/>