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순수 DME의 직접분사식 디젤기관의 성능 및 배기가스 특성
표영덕,이영재,김강출,김문헌,Pyo, Young-Dug,Lee, Young-Jae,Kim, Gang-Chul,Kim, Mun-Heon 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.5
DME(Dimethyl ether) is an oxygenated fuel with a octane number higher than that of diesel oil. It meets the ULEV emission regulation and reduces the smoke to almost zero when used in a diesel engine. In the present study, engine performance and exhaust emissions were investigated with a conventional DI diesel engine which has a jerk type injection pump. Test results showed that the power with DME were almost same as that of pure diesel oil, and the brake thermal efficiency increased a little. Also, smoke index from DME engine showed nearly zero level, but NO$_{x}$ was increased compare to diesel oil.
디메틸에테르 연료를 사용하는 3.3리터 디젤기관의 배기성능 개선
표영덕(Youngdug Pyo),이영재(Youngjae Lee),김문헌(Munheon Kim) 한국자동차공학회 2007 한국 자동차공학회논문집 Vol.15 No.4
A study is improvement of power and emission in a inline-pump DI diesel engine by using Dimethyl ether Fuel. Dimethyl ether (DME) is an oxygenated fuel with a cetane number higher than that of diesel oil. It meets the ULEV emission regulation and reduces the smoke to almost zero when used in a diesel engine. But NOx emission is almost same and CO, THC emissions are lower than that of diesel engine. The emissions aren't satisfied the stronger emission regulation in the further. Generally DOC (Diesel Oxidation Catalyst) is used to reduce CO & THC emissions and EGR (Exhaust Gas Recirculation) system is used to reduce NOx emission. Test results showed that the torque and the power with DME were almost same as those of pure diesel oil, but the brake thermal efficiency increased a little. also the BSEC (Brake Specific Energy Consumption) with DME was similar that of diesel. The test results showed that the DOC was the vary effective method to reduce the CO emission in case of Dimethyl Ether Fuel in diesel engine. But, THC emission is showed a little reduction rates. Also EGR system was the very effective method to reduce the NOx emission in case of Dimethyl Ether Fuel in diesel engine.
순수 DME 및 DME 혼합연료의 직접분사식 디젤기관의 성능 및 배기가스 특성에 관한 연구
표영덕(Youngdug Pyo),김강출(Gangchul Kim),이영재(Youngjae Lee),김문헌(Munheon Kim) 한국자동차공학회 2003 한국 자동차공학회논문집 Vol.11 No.2
DME is a good alternative fuel to reduce the smoke remarkably when used in a diesel engine, while problems concerned with low lubricity and high compressibility exist. In the present study, single cylinder DI diesel engine was operated with neat DME and DME blended fuels which are DME-diesel blended fuel and DME-propane blended fuel. The results showed that the power of the neat DME and DME blended fuels was the same as that of pure diesel oil, and the specific energy consumption slightly increased. In addition, smoke emission was considerably reduced with the increase of DME content up to zero level, but NOx emission was slightly increased.<br/>
DME연료를 사용한 인라인펌프 직접분사 디젤기관의 성능 및 배기 특성(2)
표영덕(Youngdug Pyo),김문헌(Munheon Kim),오전근(Jeonkeun Oh),방진환(Jinhwan Bang),김강출(Gangchul Kim),이영재(Youngjae Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Dimethyl ether (DME) is an oxygenated fuel with a cetane number higher than that of diesel oil. It meets the ULEV emission regulation and reduces the smoke to almost zero when used in a diesel engine. In the present study, engine performance and exhaust emissions were investigated with a 3.3 liter conventional DI diesel engine by using dimethyl ether fuel. In this test, in order to increase the fuel injection rate of DME because of high compressibility and low hearting value compared to that of diesel, the nozzle opening pressure of the injectors was lowered and the plunger stroke of the injection pump was extended. Test results showed that the torque and the power with DME were almost same as those of pure diesel oil, but the brake thermal efficiency increased a little. <br/> Also, smoke index from DME engine showed nearly zero level and NOx was decreased a little compared to diesel oil.