http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유철호(Chulho Yu),조성환(Sunghwan Cho),김우태(Wootai Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Automobile makers in Japan and Europe are mass-producing and/or developing GDI engines to cope with the future CO₂ regulation in the European market and to respond to the customers’ demand of fuel economy. GDI engines have advantages of the higher full load torque in low and medium speed range and reduced fuel consumption in part load. However, the loss of fuel in the vehicle to cope with emission regulation should be minimized. Combustion in a GDI engine depends on each part of combustion system components. Each part includes a piston bowl shape, split wall position in the intake port, injector installation angle, and so on. The methodology to optimize the combustion system in GDI engines is described in this study, presenting representative test results.
유철호(Chulho Yu),최종혁(Jonghyeok Choi),이용균(Yonggyun Yi),이내현(Naehyun Lee),노석홍(Seokhong NOh),최규훈(Kyuhoon Choi) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
The automobile industry has devoted considerable effort to increasing the thermal efficiency of gasoline engines. Extensive research and development efforts have been concentrated on establishing the combustion concept of Spark-ignited direct injection engine for the past fifty years.<br/> Recently, both growing attention towards energy saving and rapid progress in micro-computers and sensor technologies have aroused the intereets in SDI systems.<br/> In this paper, a newly developing KIA SDI engine is introduced. This SDI engine solved the problems in the past SDI engine with new technologies such as tumble port, piston with spherical cavity, high pressure fuel injection system. Further description is given about combustion characteristics, tuel economy and exhaust emission performance.<br/>
GDI 엔진의 PN 생성 원인 규명 및 저감에 대한 연구
유철호(Chulho Yu),조윤호(Yoonho Cho),김진남(Jinnam Kim),황인구(Ingoo Hwang),오대윤(Daeyoon Oh) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Fuel injected directly in cylinder in Gasoline Direct Injection engine is changed partly to particulate. It mast be reduced to meet the regulation of particulate number in EURO 6. Particulate is created in diffusion flame of wall wetting piston and combustion chamber roof, fuel deposits around injector tip, residual fuel droplets during combustion and also in the inhomogeneous gas phase around local rich area and the stored fuel in fire land. PN level can be reduced by the optimization of mapping parameter, the increase of injection pressure, multiple injection and laser drilled injection hole in injector. Also, MPI injectors are installed in ports together with GDI injectors and are used in the area that emits a lot of particulate instead of or together with GDI injectors. The source and emission level of particulate in GDI engine is investigated and the methods for reducing particulate are investigated in the paper.