http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
이종민(Jongmin Lee),이종구(Jonggoo Lee),이광주(Kwangju Lee),이종태(Jongtai Lee) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
Backfire for the spark ignition hydrogen engine was possible to control by retard of the intake valve opening timing(IVO). However, for the HCCI(Homogeneous Charge Compression Ignition) H2 engine, backfire occurred due to the excessive pressure rising by high compression ratio even when same method was used. In this study, in-cylinder pressure and intake pressure were analyzed with the intake valve opening timing and the compression ratio, for grasp of transient process and characteristics of backfire occurred in the HCCI H₂ engine. As the results, it was shown that backfire was occurred always after knock and was not significantly affected by retard of the intake valve opening timing under given experimental conditions. In addition, the higher compression ratio or the more retarding of intake valve opening timing, the more advanced backfire occurrence timing.
HCCI 수소기관에서 탄소계 배기성분 첨가에 의한 수소 EGR 특성분석
이건식(Keonsik Lee),변창희(Changhee Byun),이종구(Jonggoo Lee),양 취엔 조우(Yang Chuanzhou),이종태(Jongtai Lee) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
In a HCCI engine with hydrogen, NOx increases and operating region decreases by increasing rate of pressure rise due to high compression ratio. EGR in a HCCI-hydrogen engine can decrease NOx and increase operating region by decreasing rate of pressure rise. However, like the case of using diesel or gasoline engine with EGR, when carbon exhaust composition is applied to a HCCI-hydrogen engine with EGR, the characteristics of hydrogen-EGR are uncertain. In this research, engine performance is analysed with EGR and CO₂ rate including compression ratio in HCCI-hydrogen research engine for evaluating adaptability carbon exhaust composition for a HCCI-hydrogen engine with EGR. When comparing with a HCCI-hydrogen engine with normal EGR, application of carbon exhaust composition for a HCCI-hydrogen engine with EGR has a little positive effects such as increasing operating region, decreasing knock frequency and NOx.
이상준(Sangjoon Lee),조성재(Seongje Cho),이종태(Jongtai Lee),이성열(Songyol Lee) 한국자동차공학회 1992 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Swirl velocity, turbulence intensity and turbulent scale were investigated in order to analyze the charateristics of swirl flow which was created in constant volume vessel. Flow velocity was measured by use of hot wire anemometer.<br/> Turbulence intensity was in proportion to mean flow velocity regardless of swirl velocity. And integral time scale and integral length scale have inverse proportional and proportional relation with swirl velocity regardless of measurement position.<br/>
농공용기관의 CNG화를 하기 위한 연소실형상의 적정화 연구
이종구(Jonggoo Lee),이광주(Kwangju Lee),김용락(Yongrak Kim),이종태(Jongtai Lee),허상훈(Sanghun Hur),장양(Yang Jang) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In order to suggest suitable combustion chamber of the CNG engine for an agricultural and industrial use, 5 type of combustion chamber was found performance for combustion chamber to respond high-load and fuel efficiency. The combustion chamber of 5 type was found COV-imep less than 5%. In the case of thermal efficiency Open dish type was better than flat type. NOx was low emission at flat type by minimum flow in cylinder and HC was least emission at open dish Ⅰtype. The CNG engine for an agricultural and industrial was suggested the open dish Ⅱ type among the 5 type of combustion chamber in terms of high-load and suggested the open dish Ⅳ type in terms of fuel efficiency.