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이준일(Juneil Lee),김증한(Jeunghan Kim),김인동(Indong Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Differs from Front Wheel Drive (FWD) system, All Wheel Drive (AWD) system consists of Power Transfer Unit (PTU), Propeller Shaft, and Rear Drive Module (RDM). As a result of the complexity of AWD drivelines, a wide variety of noise problems are likely to occur. This paper is focused on the major noise phenomena, root causes, refinement methods, and practical solutions that we could experience while developing AWD vehicles ; (1) Interior booming due to power-train torsional vibration transfers to driveline directly (2) PTU rattle noise (3) Severe booming noise related with the resonance of RDM pitch mode frequency (4) Noise induced by propeller shaft
[동력전달계부문] 전기자동차용 제동시스템의 에너지 효율 향상에 관한 연구
오재웅(Jeaeung Oh),이준일(Juneil Lee),한창수(Changsu Hahn),신준(Jun Shin),신기홍(Kihong Shin) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Driving range is one of the main problems in development of Electric Vehicles(EV). The Regenerative braking system is required to overcome the problem, which converts kinetic energy of the vehicle during braking into electrical energy.<br/> This paper discusses the regenerative braking system and the program which controls the responses of stability, interaction with hydraulic brake and State Of Charge(SOC). The program is especially developed to maximize energy recovery and to optimize braking performance. This program is promised to be applied to the design of elements for EV braking system.<br/>
Palladium 촉매와 포름산을 활용한 액상 trinitrotoluene 분해 특성 연구
정상조 ( Sangjo Jeong ),최형진 ( Hyungjin Choi ),박상진 ( Sangjin Park ),이준일 ( Juneil Lee ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.5
Various methods to degrade explosives efficiently in natural soil and water that include trinitrotoluene (TNT) have been studied. In this study, TNT in water was degraded by reduction with palladium (Pd) catalyst impregnated onto alumina (henceforth Pd-Al catalyst) and formic acid. The degradation of TNT was faster when the temperature of water was high, and the initial TNT concentration, pH, and ion concentration in water were low. The amounts of Pd-Al catalyst and formic acid were also important for TNT degradation in water. According to the experimental results, the degradation constant of TNT with unit mass of Pd-Al catalyst was 8.37 min-1g-1. The degradation constant of TNT was higher than the results of previous studies which used zero valent iron. 2,6-diamino-4-nitrotoluene and 2-amino-4,6-dinitrotoluene were detected as by-products of TNT degradation showing that TNT was reduced. The by-products of TNT were also completely degraded after reaction when both Pd-Al catalyst and formic acid existed. Even though there are several challenges of Pd-Al catalyst (e.g., deactivation, poisoning, leaching, etc.), the results of this study show that TNT degradation by Pd-Al catalyst and formic acid is a promising technique to remediate explosive contaminated water and soil.