http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이광주(Kwangju Lee),이종구(Jonggoo Lee),이종민(Jongmin Lee),이종태(Jongtai Lee) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
The power of a hydrogen-fueled engine higher than gasoline had been disturbed by backfire. Therefore, in order to get the power of higher than gasoline engine level in a hydrogen-fueled SI engine, the change in the valve timing and the effect of the lean boosting are analyzed. As the results, the exhaust valve closing timing is not worked on backfire control, but the intake valve opening timing is worked. In addition, it is confirmed that the power of higher than gasoline engine level and NOx-free are achieved by lean boosting. This value are obtained under 2.1bar and Φ=0.3.
이광주(Kwangju Lee),허상훈(Sanghun Hur),김용락(Yongrak Kim),이종태(Jongtai Lee) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
In order to grasp the possibility of simultaneously achieving ultra low NOx, high power and high efficiency without backfire in a hydrogen-fueled engine using external mixture injection at high load, as early step the effects of low temperature combustion were analyzed in terms of backfire occurrence, knock and performance enhancement. As the results, it was found that the achievement of backfire control by retarding IVO, high power(above a gasoline engine) and high efficiency(around 37.5%) in a hydrogen-fueled engine is possible around a boosting pressure of 1.7 bar at an equivalence ratio of Φ=0.4.
흡기밸브 열림 시기에 의한 흡기관분사식 수소기관의 역화억제
이광주(Kwangju Lee),Huynh Thanh Cong,강준경(Joonkyoung Kang),이종태(Jongtai Lee) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In order to certify the control of back-fire in the hydrogen-fueled engine with external mixture by intake valve timing, the characteristics of combustion are experimentally studied with change of intake valve opening timing at the fixed exhaust valve closing timing. As the results, when the intake valve opening timing is retarded, back-fire limit equivalence ratio is increased, and as expected, back-fire does not occurred from TDC. In addition, the timing of the best performance without back-fire is shown when the exhaust valve closing timing is 10° ATDC and the intake valve opening timing is TDC.
Comparison of Joint Models under Worst Loads
이광주(Kwangju Lee) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A B-pillar to rocker joint is identified using some concept joint models. The predicted displacements are compared in terms of accuracy. The effect of coupling between rotations in different planes is also investigated. Finally, the worst loads are defined to compare joint models, under which the error between the measurements and the predicted displacements from the identified joint model is maximized.<br/>
흡기관 분사식 수소기관에서 고부하시 NOx 감소 가능성에 관한 연구
이광주(Kwangju Lee),허상훈(Sanghun Hur),이종태(Jongtai Lee) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In order to grasp the possibility of achieving low NOx and high performance without backfire in a hydrogen-fueled engine using external mixture injection at high load, the effects of increasing the boosting pressure were analyzed in terms of combustion characteristics, and performance enhancement. As the results, it was found that the achievement of low emission(NOx of less than 20 ppm), high power(equal to that of a gasoline engine) and high efficiency(around 36.7%) without backfire in a hydrogen-fueled engine is possible around a boosting pressure of 1.5 bar at an equivalence ratio of Φ=0.35.
수소-공기 예혼합 압축착화 기관의 운전영역 확장을 위한 흡기 온도 증가에 관한 연구
이광주(Kwangju Lee),김용락(Yongrak Kim),이종구(Jonggoo Lee),이종태(Jongtai Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In order to expand the operation region for the compression ignition with hydrogen-air pre-mixture, the operation region, characteristics of combustion and performance were analyzed by increasing intake temperature. As the results, in the case of increasing intake temperature, the minimum compression ratio for possible compression ignition was predictably decreased by increasing temperature of initial compression due to increasing intake temperature. In addition, Fuel-air equivalence ratio expand for Φ=0.54 when intake temperature increase at 100℃. This result is expanded two times than room temperature. But, it was analyzed that difference of real supply energy hardly increased than expansion of equivalence ratio due to increasing intake temperature.
이광주(Kwangju Lee),허상훈(Sanghun Hur),김용락(Yongrak Kim),이종태(Jongtai Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In order to grasp the possibility of simultaneously achieving ultra low NOx, high power and high efficiency without backfire in a hydrogen-fueled engine using external mixture injection at high load, the effects of low temperature combustion were analyzed by NOx emission, in-cylinder gas temperature and performance. As the results, it was found that ultra low NOx(almost 0 ppm), high power(above a gasoline engine) and high efficiency(around 37.3%) in a hydrogen-fueled engine is possible around a boosting pressure of 1.7 bar at an equivalence ratio of Φ=0.33.
이광주(Kwangju Lee),김용락(Yongrak Kim),허상훈(Sanghun Hur),이종태(Jongtai Lee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In order to develop a compression ignition H₂ engine operated under neat hydrogen-air pre-mixture and room temperature conditions, as the first step, the variable compression ratio hydrogen research engine that has higher compression ratio more than 40 was developed in this study. Feasibility of the compression ignition by using high compression ratio, also, was grasped. As the results, it was shown that neat hydrogen-air of ultra lean mixture(equivalence ratio equal to 0.22) is spontaneously ignited at compression ratio 26 which is lower than estimated one without any assist method for promoting self-ignition but has narrow operating regions for equivalence ratio.