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윤영춘(Young-Chun Youn),권기린(Ki-Rin Kwon) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
The purpose of this study is to prevent the stick, scuffing, scratch between piston and cylinder in advance, to obtain data for duration test in actual engine operation. Therefore, temperature gradient in peripheral and axial distribution of cylinder bore were measured in use of 800cc class gasoline engine. The results obtained are summarized as follows ;<br/> 1) The maximum reaction force by overlap is 101.97kg. The skirt length at that position is 10mm from skirt upper.<br/> 2) The rear side temperature of top dead center is 142℃ in peripheral distribution, it is about 20℃higher than thrust, anti-thrust, front side temperature.<br/> 3) The rear side temperature of bottom dead center is 125℃ in axial distribution, whereas the rear side of midway position temperature is 120℃.<br/> 4) The temperature of cylinder wall is about 20-30℃ higher than temperature of cooling water.<br/> 5) The temperature of cylinder wall at top dead center in use of SAE 30^* lubricating oil is 16℃ higher than SAE 20^# at 6000rpm.<br/>
윤영춘,권기린 濟州大學校工科大學産業技術硏究所 1996 尖端技術硏究所論文集 Vol.7 No.2
The purpose of this study is to prevent the stick. scuffing. scratch between piston and cylinder in advance, to obtain data for duration test in actual engine operation. Therefore, temperature gradient in peripheral and axial distribution of cylinder bore were measured in use of 800cc class gasoline engine. The results obtained are summarized as follows ; 1) The maximum reaction force by overlap is 101.97kg. The skirt length at that position is 10mm from skirt upper. 2) The rear side temperature of top dead center is 142℃ in peripheral distribution, it is about 20℃ higher than thrust, anti-thrust, front side temperature. 3) The rear side temperature of bottom dead center is 125℃ in axial distribution, whereas the rear side of midway position temperature is 120℃. 4) The temperature of cylinder wall is about 20∼30℃ higher than temperature of cooling water. 5) The temperature of cylinder wall at top dead center in use of SAE ?? lubricating oil is 16℃ higher than SAE 20 at 6000rpm.
유도형 플라즈마 화학적 기상 증착법으로 증착된 저유전상수 플라즈마 중합 메틸사이클로헥산 박막
조현옥,권영춘,양재영,정동근 성균관대학교 기초과학연구소 1999 論文集 Vol.50 No.-
Low-k plasma polymerized thin films were deposited by inductively coupled plasma chemical vapor deposition (ICPCVD) using the methyl-cyclohexane precursor. Effects of the ICP power and the substrate bias (SB) power on the properties of the deposited films were studied. As ICP power was increased from 5W to 70W at the SB power of 10W, the relative dielectric constant increased from 2.65 to 3.14. As SB power was increased from 5W to 70W at the ICP power of 10W, the relative dielectric constant increased from 2.63 to 3.47. The thermal stability of deposited thin films was remarkably improved with the increase of the SB power, but not with the increase of the ICP power.