http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
초음파 조사 BD20의 디젤기관 적용 시 NOx 저감을 위한 분사지연과 EGR 동시적용 특성에 관한 실험 연구
정영철(Youngchul Jung),임석연(Seokyeon Im),박성영(Sungyoung Park),송용식(Youngsik Song),류정인(Jeongin Ryu) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
BD containing about 10% oxygen has attracted attention due to soaring oil prices and environmental pollution. The oxygen decreases soot by promoting combustion, but it also increases NOx. To decrease NOx Emission, injection time is delayed or an EGR system is applied so that NOx might be decreased. In that case, engine power is reduced and exhaust gas is raised. However, the fuel is changed physically and chemically, promotes combustion, and thus inhibits such a problem thanks to ultrasonic energy irradiation. Hence, this study was to identify the optimum EGR rate by investigating the engine performance and the characteristics of exhaust substance in accordance with the EGR rate after irradiating ultrasonic energy to BD20 and applying it to modern diesel engine. As a result, with UBD20 (ignition timing of BTDC16°), the optimum EGR rate that can satisfy both engine performance and characteristics of exhaust substance was in the range of 15%.
초음파 조사 바이오디젤 혼합연료의 Common-rail형 디젤기관 적용 특성에 관한 연구
임석연(Seokyeon Im),정영철(Youngchul Jung),박성영(Sungyoung Park),최두석(Dooseuk Choi),류정인(Jeongin Ryu) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This is an experimental study on characteristics of engine performance and discharged materials in common-rail type diesel engine. The bio-diesel fuel is mixed with the diesel fuel in common use at the ratio of 20% or 100%. The diesel fuel and blended fuel is irradiated by ultrasonic wave energy. The diesel fuel, blended fuel, reformed diesel fuel and reformed blended fuel by ultrasonic wave energy is applied to the experimental engine individually. The results are compared with one of the diesel fuel in common use and analyzed.
Vortex Tube의 엔진 배기가스 에너지 분리특성에 관한연구
정영철(Youngchul Jung),최두석(Dooseuk Choi),박성영(Sungyoung Park),김창수(Changsu Kim),이상인(Sangin Lee),류정인(Jeongin Ryu) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
An object of this study is to confirm the opening amount of the throttle valve that is begun the energy separation of vortex tube for various engine speed and load condition in a common rail diesel engine. The vortex tube located at downstream of the exhaust manifold is a device separating the incoming exhaust gas to hot and cold stream. To find optimum separation efficiency of vortex tube, the opening amount of throttle valve has been investigated for various engine speed and load conditions. It was found that the influence of engine speed is dominant compared with that of engine load. As engine speed is increased, the throttle opening amount starting energy separation is reduced.
초음파 에너지 조사 시간과 분사지연에 따른 BD20의 디젤기관 연소특성에 관한 실험 연구
임석연(Seokyeon Im),조성철(Sungchul Jung),정영철(Youngchul Jung),박성영(Sungyoung Park),최두석(Dooseuk Choi),류정인(Jeongin Ryu) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
An object of this study is to understand the correlation between the characteristics of an engine performance and combustion, applying BD20 fuel reformed by ultrasonic energy irradiation to diesel engines. Before conducting the main experiment, an experiment was performed to determine the optimum injection timimg of the fuel used in applying the ultrasonic energy irradiation to BD20. To control the duration of the ultrasonic energy irradiation, the capacity of an ultrasonic energy fuel supply system was tested with 550㏄ and 1100㏄ chambers. As the result of the analysis of the regular BD20 and BD20 to which ultrasonic energy irradiation was applied, the BSFC and the Power of the irradiated BD20 was improved 3% and 6%, respectively compared to those of non-irradiated BD20. When the fuel injection timing was delayed by 5°, the engine power was improved by 3%, and the BSFC was improved by 2%. The maximum combustion pressure of irradiated BD20 was improved by a maximum of 6% in comparison to that of regular BD20, and demonstrated a synergistic effect of 3% by delaying the injection timing 5°.