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정재연(J.Y.Jung),조시기(S.G.Cho),조인성(I.S.Cho),이봉구(B.G.Lee) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Friction losses in engine of automobile are very high because its cylinder sizes are small, area of sliding surface is comparatively large and it is used frequently in low output.<br/> Therefore, In order to analysis the characteristics of elasto-hydrodynamic lubrication between the piston ring and the cylinder of the actual engine, The numerical analysis of EHL was studied.<br/> As the numerical analysis method, we used the Newton-Raphson Method of which convergence is very good for a highly loaded contact of EHL.<br/>
사축식 유압 피스톤 펌프의 디스크 편심률에 따른 실린더블록 구동영역에 대한 연구
정재연(J. Y. Jung),백일현(I. H. Baek),조인성(I. S. Cho),송규근(K. K. Song),오석형(S. H. Oh),정용욱(Y. W. Jeong) 유공압건설기계학회 2008 드라이브·컨트롤 Vol.5 No.2
To improve the performance of the bent axis type axial piston pump driven by the tapered piston, it is necessary to know the driving characteristics and mechanism of the tapered piston and the cylinder block. Since each piston not only rotates on its axis and reciprocates in the cylinder bore, but also revolves around the axis of the driving shaft, it is difficult to analyze the driving mechanism theoretically. The theoretical mechanism for the bent axis type axial piston pump is studied by using the geometrical method. The driving range of the tapered piston is determined by theoretical equations. The results show that the cylinder block is driven by one tapered piston in a limited range and the core parameters such as driving factor of the piston and the ahead delay angle influenced performance of the bent axis type axial piston pump
사축식 유압 피스톤 펌프의 경전각에 따른 펌프 구동범위에 대한 실험적 연구
정재연(J.Y. Jung),백일현(I.H. Beak),주호영(H.Y. Ju),송규근(K.K. Song),조인성(I.S. Cho),오석형(S.H. Oh),장동혁(D.H. Jang) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
To improve the performance of the bent-axis type axial piston pump driven by the tapered piston, it is necessary to know the driving characteristics and mechanism of the tapered piston and the cylinder block. Since each piston not only rotates on its axis and reciprocates in the cylinder bore, but also revolves around the axis of the driving shaft, it is difficult to analyze the driving mechanism theoretically. The theoretical mechanism for the bent-axis type axial piston pump is studied by using the geometrical method. The driving range of the tapered piston is determined by theoretical equations. The experimental results show that the cylinder block is driven by one tapered piston in a limited range and the core parameters such as driving factor of the piston and the ahead delay angle influenced performance of the bent-axis type axial piston pump