http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
[디젤엔진부문] VCO와 MiniSAC 노즐특성이 Small HSDI 디젤엔진의 성능에 미치는 영향
신범식(Boumsik Shin),류명석(Myungseok Lyu),최규훈(Kyuhoon Choi) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
VCO nozzle was devised to minimize the HC emission and has been applied on some HSDI diesel engines. But it is not well reported whether VCO nozzle would be advantageous over SAC nozzle in a small HSDI diesel engine. In this paper it is presented that characteristics of VCO and SAC nozzle under common rail fuel injection system and their effects on the performance in a small HSDI diesel engine.
[디젤엔진부문] Common Rail을 이용한 분사압력변화가 소형 HSDI 디젤엔진의 Smoke 및 연료소모량에 미치는 영향
신범식(Buomsik Shin),류명석(Myungseok Lyu),최규훈(Kyuhoon Choi) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Great attentions are paid to HSDI diesel engine for passenger car because of its high thermal efficiency. Most development research in HSDI diesel engine is focused on applying common rail system as a fuel injection equipment. In this study, a series of tests are carried out to investigate the effect of injection pressure variations by common rail on the smoke and fuel consumption in a small HSDI diesel engine. As a result of this study it is concluded that there is an optimum rail pressure dependent on combustion system such as nozzle type, combustion chamber geometry.
유철호(Chulho Yu),최종혁(Jonghyeok Choi),이용균(Yonggyun Yi),이내현(Naehyun Lee),노석홍(Seokhong NOh),최규훈(Kyuhoon Choi) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
The automobile industry has devoted considerable effort to increasing the thermal efficiency of gasoline engines. Extensive research and development efforts have been concentrated on establishing the combustion concept of Spark-ignited direct injection engine for the past fifty years.<br/> Recently, both growing attention towards energy saving and rapid progress in micro-computers and sensor technologies have aroused the intereets in SDI systems.<br/> In this paper, a newly developing KIA SDI engine is introduced. This SDI engine solved the problems in the past SDI engine with new technologies such as tumble port, piston with spherical cavity, high pressure fuel injection system. Further description is given about combustion characteristics, tuel economy and exhaust emission performance.<br/>
CFD를 이용한 직접 분사식 스파크 점화 엔진의 실린더 내부 유동 해석
김명환(Myunghwan Kim),이내현(Naehyun Lee),최규훈(Kyuhoon Choi) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.5
Optimization of in-cylinder flow is regarded as one of the most important factors to realize stable stratified charge combustion in a Spark-ignited Direct Injection(SDI) engine. Therefore, Computational Fluid Dynamic(CFD) simulation technique were used to clarifY the characteristics of in-cylinder flow of a SDl engine with top entry intake port. Also, CFD results were compared to experimental results using Laser Doppler Velocimetry(LDV), Particle Image Velocimetry(PIV) and good validations were met. As the results, reverse tumble flow generated during intake process was preserved by configuration of curved piston while base and reverse tumbles were diminished at the end of compression stroke in case of flat top piston. In addition, it will be needed to optimize the fuel mixture distribution based on these results.<br/> Optimization of in-cylinder flow is regarded as one of the most important factors to realize stable stratified charge combustion in a Spark-ignited Direct Injection(SDI) engine. Therefore, Computational Fluid Dynamic(CFD) simulation technique were used to clarifY the characteristics of in-cylinder flow of a SDl engine with top entry intake port. Also, CFD results were compared to experimental results using Laser Doppler Velocimetry(LDV), Particle Image Velocimetry(PIV) and good validations were met. As the results, reverse tumble flow generated during intake process was preserved by configuration of curved piston while base and reverse tumbles were diminished at the end of compression stroke in case of flat top piston. In addition, it will be needed to optimize the fuel mixture distribution based on these results.<br/>