http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
대형 트럭․트레일러용 슈퍼 싱글 휠 구조해석 및 위상최적화에 관한 연구
정윤식(Yunsik Jeong),노윤식(Yunsik Ro),장병춘(Byeongchun Jang),변용완(Yongwan Byeon),하태수(Taesoo Ha) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Heavy duty vehicles such as large trucks, tractors, trailers consist of approximately four to five axles and tires and wheels in the rear axles is genearally used to the dual type. But, this type are some problems such as the increase of total weight, the rise of manufacturing costs, the brakedown of tire by extraneous bodies, and the rollover of vehicle. To solve the problem, super-single wheel is developed and produced in USA and EU. In the domestic market, the super-single tires were already developed with tire makers as the center, but super-single wheels remain to the unexplored area. The purpose of this paper is 3D modeling of super-sing wheel by Catia V5, structure analysis to use Ansys, coupled analysis using Tosca and design of super-single wheel appling topology optimization.
장병춘(Byoungchun Chang),고영진(Youngjin Ko),노윤식(Yunsik Ro) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11
In the current automotive industry, Hybride car, lightweight of the auto and multi-staging technology of the transmission has been studied in order to high fuel efficiency and improve power performance. Stage of AT(Automatic Transmission) is increasing continuously but its structure is more complex. So, CVT(Continuously Variable Transmission) which has infinite stages and freely shifting has emerged ?s the leading candidate. But, power transmission by friction between belt and pulley is the cause of power loss due to friction. In this paper, to overcome the disadvantage of CVT, GAC(Gear-Arm Chain) type CVT which delivered power without slip by engagement of the gear-arm and the chain has been studied. The analysis models were composed GAC CVT, and the multi-body dynamics program ADAMS was used for analysis of dynamic behavior characteristics. As a result, there was no slip of the biggest weakness of general CVT, and Speed ratio was confirmed at about 0.73 to 1.26.
유성기어-체인형 무단변속기의 동역학적 거동에 관한 연구
장병춘(Byoungchun Chang),고영진(Youngjin Ko),정윤식(Yunsik Jeong),백일현(Ilhyun Baek),노윤식(Yunsik Ro) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
In the current automotive industry, due to high oil prices, new mechanism of automatic transmission has been studied in order to high fuel efficiency and improve power performance. Stage of AT(Automatic Transmission) is increasing continuously but its structure is more complex. So, CVT(Continuously Variable Transmission) which has infinite stages and freely shifting has emerged s the leading candidate. But, power transmission by friction between belt and pulley is the cause of power loss due to friction. In this paper, to overcome the disadvantage of AT and CVT, PGC(Planetary Gear-Chain) type CVT which delivered power without slip by engagement of the planetary gear and the chain has been studied. The analysis models were selected two types of PGC CVT, and the multi-body dynamics program ADAMS was used for analysis of dynamic behavior characteristics. As a result, B-type model rotated driving and driven part at the same time shows to wide shifting ratio and low average torque.
장병춘(Byoungchun Chang),오석형(Seokhyung Oh),노윤식(Yunsik Ro) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In this study, The virtual machines instead of a common 3D measuring instrument was applied to the reverse engineering, it was investigated for the suitability. The virtual machine using reverse engineering, the intuitive model of the object was made by the designer"s eidetic skills and the NC data path and shape data generated from it. The extracted data were remodeled and approximation curve was made using NURBS curve fitting. From these series of process, the final revers engineering data of the objects could be gained. Four conclusions were obtained from this study. First, the appropriate degree of the NURBS curve fitting is 6 degrees which has small local errors, is stable but the equation is not that complicated. Second, when it comes to approximation of curve, the radius of the curve and the increased number of the data is in inverse proportion to approximate quantity of curve. Third, in the data extraction from NC tool path, the error occur equivalent to the tool radius according to number of tool axis and direction of tool path. And accuracy of NC is more precise, and increase in the number of extracted data. Last of all, the virtual machine could extract the shape data of the object and could remodel without 3D measuring instrument, and the revers engineering was possible with only the data of 13% level of 3D measuring instrument.
고영진(Youngjin Ko),조상현(Sanghyun Cho),박경민(Kyungmin Park),노윤식(Yunsik Ro) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Most recently GVW 10ton truck is under development for high efficiency and low fuel consumption and low exhaust gas using hybrid electric vehicle system. In general, mild type commercial hybrid electric vehicle(CHEV) is composed engine, motor, battery, AMT(Automated Manual Transmission) and mode-changeable clutch between an engine and a motor. A performance estimation technology is developed using the vehicle simulation technology like SILS(Software In the Loop Simulation) for hybrid electric vehicle system. Vehicle model is simulated to use TruckSim of MSC company for vehicle dynamics. It is expected that the performance simulation model developed in this study can be used in design of each system and can be estimated driving performance and exhaust gas by driving strategy of commercial hybrid electric vehicle system.
Engine ECU_ILS적용 상용차량의 연비 및 배출가스 평가시스템 개발
고영진(Youngjin Ko),김태준(Taejun Kim),박경민(Kyungmin Park),노윤식(Yunsik Ro),문남수(Namsoo Moon),오승용(Seungyong Oh) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Jeonbuk Institute of Automotive Technology(JIAT) has recently developed a Hardware-in-the-Loop(HIL) testing system for Engine ECU of Hybrid Electric Vehicle(HEV). The objective of this project was to develop an evaluation system for fuel economy and exhaust emission evaluation of commercial hybrid electric vehicles appling ECU_ILS technology. This system was previously applied to conventional vehicles. To develop an engine and vehicle, there is a need for a system that can evaluate power performance such as dynamometer and exhaust gas analyzer but a lot of times and expenses are spent. In contrast, a model based development environment provides a less expensive alternative which controlled repeatable tests can be performed in much shorter time periods. Therefore, HILS system environment that can consider the behavior of actual vehicles for evaluation of control logic, fuel consumption and exhaust gas is required. This developed system can analyze and evaluate fuel injection rate, fuel injection time, fuel consumption and exhaust gas using map like actual vehicle test on road. Also, this system is expected to be able to analyze the effects of vehicles behavior and control logic development of peripheral device in relation to engine and vehicles. This HIL system can be used to develope the system that can evaluate fuel economy and exhaust gas by control strategy of commercial hybrid vehicle systems in the future.