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대형 승용차량용 연료펌프의 소음특성에 대한 실험적 고찰
사종성(Jongsung Sa),강태원(Taewon Kang) 한국생산제조학회 2011 한국생산제조학회지 Vol.20 No.5
The comfort and quietness of vehicle has been improved greatly due to the development of technology in automobile industry. Some of noise reductions, for example, are driven by the improvement in the power-train system. Due to better in all performance, it is required to reduce more noise in automobile components. One of them is related to the fuel pump system including a pump and a tank. Therefore, this study is focused on investigating the characteristics of fuel pump and fuel tank first, and then comparing the data before and after installation of fuel pump system in a testing vehicle. Additionally, the measured data will be analyzed to identify the problems and provide knowledge to reduce the level of noise and vibration in fuel pump system.
구동축의 등속조인트 방식에 따른 진동특성의 실험적 연구
사종성(Jongsung Sa),안태길(Taekil Ahn),강태원(Taewon Kang) 한국생산제조학회 2019 한국생산제조학회지 Vol.28 No.1
The vibrational characteristics of automotive idling and driving were investigated experimentally using various types of constant velocity joint. Plunging force (PF) and generating axial force (GAF) are the most influential quantities related to vibration characteristics of constant velocity joint. The results of the MTS test set and vibration test show that PF has higher values and GAF aggravates the automotive idling and shudder vibration characteristics. Furthermore, the variation amplitude and the harmonic periods of the vibrational characteristics in the axial direction of the shaft affect the significantly idle vibration of the drive shaft. The measured apparent mass and acceleration data are useful in calculating the PF of the drive shaft, which has no dynamic absorber.
사종성(Jongsung Sa),강태원(Taewon Kang) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.4
This study aims to understand the applied forces and related vibrational characteristics of a tripod joint (TJ), which is mostly used in front-drive-type middle-sized sedans in South Korea. The plunging force (PF) and generated axial force (GAF) are the most influential quantities related to the vibrational characteristics of a driveshaft. To obtain meaningful data, specially designed tests were performed using MTS test sets. The results of direct measurements reveal that higher PF and GAF values appear to worsen the vibrational characteristics of the vehicle. On the other hand, the measured apparent mass is useful for calculating the applied forces for a short driveshaft that has no dynamic vibration absorber. Among diversely controlled samples, it shows that the viscosity and tight fit are very sensitive to shudder vibrations of the vehicle. Therefore, these are good design factors for quality controls in the production line of constant-velocity joints.
판넬 기여도 해석을 이용한 승용차 실내 소음 분석 기법에 관한 연구
진용선(Yongsun Jin),김찬묵(Chanmook Kim),고강호(Kangho Ko),허승진(Seungjin Heo),국형석(Hyungseok kook),사종성(Jongsung Sa) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper. the panel contribution analysis is used to identify the noise contribution of each sub-panel of car body to the total radiated noise. The accelerations of panels are measured in the normal direction on the outer surface of car body during operation. Acoustic transfer function, which has great influence on the panel contribution, is experimentally measured. In this procedure, volume acceleration of loudspeaker is defined by the application of equivalent area and a manifestation of the vibro-acoustical reciprocity. The panel contribution method is validated by comparing the radiated interior noise with the calculated radiated noises from each sub-panel. Contribution of panels for interior noise is ranked and problematic sub-panels of the car can be re-designed or reinforced according to the results.