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바이오디젤 혼합연료를 적용한 4 실린더 커먼레일 디젤엔진에서 EGR율이 연소 및 배기특성에 미치는 영향
정규수(Kyusoo Jeong),이동곤(Donggon Lee),연인모(Inmo Youn),노현구(Hyungu Roh),이창식(Changsik Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This study describes the effect of EGR rate on the combustion and emissions characteristics of a four cylinder CRDI diesel engine using biodiesel(Soybean oil) blended diesel fuel. The experimental fuel is composed of 30% biodiesel(Soybean) and 70% ULSD(Ultra low sulfur diesel) by volumetric ratio. The experiment of engine emissions and performance characteristics were performed under the various EGR rate. The experimental results show that ignition delay was extended with increasing EGR rate, and maximum combustion pressure and heat release gradually were decreased. Comparing biodiesel blended fuel and ULSD, the injection quantity of biodiesel blended fuel was more increased than ULSD. The emission results show that NOx emission of biodiesel blended fuel with increasing EGR rate shows more higher than that of ULSD. However, in the case of biodiesel blended fuel, HC, CO and soot emissions were decreased than that result of ULSD.
바이오디젤 혼합연료를 적용한 커먼레일 디젤엔진에서 파일럿 분사에 따른 연소 및 배기 특성
정규수(Kyusoo Jeong),이동곤(Donggon Lee),노현구(Hyun Gu Roh),이창식(Chang Sik Lee) 한국연소학회 2011 한국연소학회지 Vol.16 No.4
The purpose of this study was to analyze the effect of pilot injection strategy on the combustion and emissions characteristics in a four cylinder common-rail direct injection diesel engine fueled with biodiesel(soybean oil) blend. The tested fuel was mixed of 20% biodiesel and 80% ULSD(Ultra low sulfur diesel) by volume ratio. The experiments were performed under two load conditions, and results were compared with those of single injection. The experimental results showed that the ignition delay of BD20 was shorter than compared to that of ULSD in the case of low load condition. Also, the fuel consumption of BD20 was more higher than that of ULSD. Fuel consumption by applied pilot injection strategy were generally decreased compared with that of single injection. In the case of pilot injection, the exhaust emissions such as CO and HC emissions were decreased compared to the single injection.
2단연소방식이 디젤엔진의 연소성능 및 배출물 특성에 미치는 영향
정규수(Kyusoo Jeong),이동곤(Donggon Lee),연인모(In Mo Youn),노현구(Hyun Gu Roh),박성욱(Sungwook Park),이창식(Chang Sik Lee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The purpose of this study was to analyze the effect of two-stage injection on combustion performance and NOx reduction characteristics in a four cylinder diesel engine. The experiment was carried out under various first injection quantity and EGR rate at constant engine speed, load condition. In addition, the combustion and emission results were compared with the case of applied single injection timing at TDC. The experimental results show that NOx emissions of two-stage combustion strategy were clearly reduced, however, fuel consumption was slightly increased compared with single fuel injection. Also, soot emissions showed similar trends except of the 20% EGR rate.
바이오디젤 혼합연료를 적용한 승용 디젤엔진의 성능 및 배출물 저감특성
이동곤(Donggon Lee),정규수(Kyusoo Jeong),노현구(Hyun Gu Roh),이창식(Chang Sik Lee) 한국연소학회 2011 KOSCOSYMPOSIUM논문집 Vol.- No.43
The effect of various load and injection pressure on combustion and emission characteristics were investigated in a 4-cylinder CRDI diesel engine fueled with biodiesel blends. For investigating the effect of biodiesel blended ratio on combustion characteristics, the experiments were performed at various load conditions and injection pressures. In addition, pilot injection strategy was maintained by pilot injection quantity of 1.6㎎/cycle and pilot injection timing of BTDC 15°. The experimental results based on the application of biodiesel blended fuel to a compression ignition engine showed that the ignition delay when using biodiesel blended fuel was faster than that of conventional diesel fuel(ULSD), and the maximum combustion pressure was higher than when using conventional diesel fuel. In terms of the characteristics of emissions, the particulate matter concentration when using biodiesel blended fuel was reduced and the other emissions of NOx and CO emissions were significantly increased as increased of injection pressure. However, as increased of engine load, HC and CO emissions were reduced.