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커먼레일 연료 분사시스템을 이용한 DME DI 기관의 성능과 배출가스특성에 관한 최적화 연구
양세문(Seemoon Yang),전상엽(Sangyecp Chun),이영재(Younjae Lee),김영길(Yonkil Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Dimethyl Ether(DME) seems to be one of the most attractive alternative fuels for heavy-duty engines. Many researches and developments have been carried out on DME engines. However, the principal technical problems have not yet been solved. One problem is related to finding safety fuel supply systems able to suppress vaporizations. To search for these systems, we have studied optimization of injection equipment in terms of the relation between performances and emission characteristics by using Common rail injection systems. We found that thermal efficiency and emission is satisfactory when the engine is operated at 50MPa, 14 degree BTDC main injection. Also, when the pilot injection by common rail is 10% at total injection, 40 degree BTDC, NOx emission reduced up to 30% and than only main injection. And the Brake thermal efficiency is optimum when the nozzle needle lift 0.21mm for test engines.<br/>
양세문(Seemoon Yang) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
①JP-8 is called as multi source-multi purpose, according to the diverse application such as generation, public use, vehicles, military use, aviation use. In this injection characteristics, A preliminary injection characterization of injection rate and injection quantity behavior was investigated from a high pressure common rail injection system used in heavy duty engine. Therefore, a trade-off appears the tendency for the injection speed and injection quantity and injection pressure according to the spill. As expected, with pilot injection affects spray quantity and injection evolution of subsequent without pilot injection in JP-8 aviation fuel and diesel fuel. It was found that the total injection quantity was decreased by adding 20% pilot injection duration. because pilot injection quantity causes solenoid response loss and needle lift stroke friction loss. ②To be developed in conjunction with local companies and regional organizations such as the participating companies and the Gwangju Institute of Science and Technology for the processing of onion waste. In animal feed subunit low-temperature storage of the first, the waste, to resolve the litigation of complaints by the stench of the fertilizer onion waste of second low-temperature storage large groups. Therefore, to develop a CO2-reducing green processing system and recycling of agricultural waste. ③And to the activation of the 10th Butterfly Festival to promote Jeollanam Hampyeong and Hampyeong World Expo insect butterfly Butterfly Festival to promote the carriage of the towing vehicle and the shape of a ladybug design and production of new or changes to existing vehicles improved. The towing vehicle is to purchase a combination of 25 passenger cars were produced from existing operations minibus ladybug appearance in the form of structural change. ④The development of the private tourist train to move between Anshan ballistic harbor breakwater and harbor in the Korea International Boat Show songs. The towing vehicle is to remove the appearance of the purchase made by saetsi accompany agricultural tractors and construction machinery was old operational changes to streamline the form of high-speed boats. We developed a two-way trolley train station installed on the steering wheel section, but only the central part of the development of both the towing vehicle hydraulic caster can move in both directions before and after the rotation period is not a geographical term for ballistic and Jeongok. ⑤The technology to produce the final shape by machining one or a few number of components consisting of the integral part of the product forming techniques. The car manufacturer has been assembled over 20,000ea different two parts. The reduction process because the speed and energy consumption during part production material costs, the progressive development of mold that can be produced by processing one or a few that were made i n several pieces to manufacture car parts.
[디젤엔진부문] DME 엔진의 커몬레일 연료 분사시스템에 관한 연구 (베이퍼록 방지 장치 개발)
양세문(Seemoon Yang),남상훈(Sanghun Nam),노부히코 토리고에(Nobuhiko Torigoe),김영길(Youngkil Kim) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
DME is one of the most attractive fuels for heavy duty engines in a near future. DME Engines for utilization technologies have a defect that fuel feeding in liquid state is unstable for aptness of vaporization in fuel supply systems. <br/> In this study, for resolving the defects of un stability, in stead of N₂Bomb method used formerly, We have tried to develope the new equipment and obtained good enough results, that is, its effectiveness can be proved in engine tests<br/>