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구광모(kwangmo Koo),허봉만(bokman heo),백의현(euihyun Baek) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Function of Intermediate shaft is connecting device between steering column and steering gear box with revolving force. Therefore, the automotive industry is lately interested in reduction the noise by change the steering column type which is EPS. Yoke’s serration area is mounting by fastening torque with inserted to column shaft and gear box. In vehicle, noise may be generated by wearing and deforming of yoke’s serration area with consistent steering force. In conclusion, this study purpose is analyzed by the effect factor of mounting condition and also, stress distribution of yoke is confirmed by the CAE Analysis. DOE of noise generation is found by CAE Analysis for verification. H’ form of yoke , which is removed the 9 serration may be having the best structure due to the stable and safe. Additionally, results of CAE Analysis is supported the this conclusion.
조향계의 중간축어셈블리 형식 및 조건에 따른 조향 감성품질평가
구광모(Kwangmo Koo),이종화(Jonghwa lee),김정문(Jungmoon kim),박종남(Jongnam park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Emotional Quality Criteria of steering system in vehicle is more important and required from customer. Intermediate Shaft Assembly is not only simple design and also, easily mounting to the vehicle. Therefore, purpose of this study is to improve the product engineering of Intermediate shaft assembly by evaluated and analyzed the related quality factors with each type of Intermediate shaft. This study is verified the 5types of Intermediate shaft assembly with following items; noise, torsional stiffness, FFT analysis and emotional quality with looseness grade in bench and vehicle. The results are followings; First, vibration value is small when sti ffness is high in bench and vehicle. Especially, ball-slider type is best stiffness and quality. Second, Vibration value is small when an gle variation is small with lash. For example, Vibration value is increased with minimum lash for 23’and emotional level is evaluate d for 6+.In conclusion, to meet the emotional level for 7-, accepted lash criteria of Intermediate shaft assembly may be considered the maximum lash for 14’ under the loaded the torque for 4N.m when tested.
김동익(dongik Kim),이흥주(heungjoo Lee),구광모(kwangmo Koo),윤형준(hyoungjun Yun) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
A lot of studies are being conducted around the world for the improvement of vehicle’s fuel efficiency. Especially, The required strength and performance of the U Joint assembly component that transfers the steering force by driver to the steering gear were developed to be suitable to each function by developing manufacture technology such as Aluminum forging, Aluminum extrusion, Hydro-forming. For the robust design, CAE analysis was executed after the initial concept design and the result of CAE analysis was applied to other designs, thereby the optimum design was accomplished. We have made the Aluminum U-Joint assembly component which is 43% lighter than the steel U-Joint assembly component. We confirmed the possibility that the Aluminum U-Joint could be applied to a high grade fuel cell vehicle.