• Journal of computational fluids engineering
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• v.7 no.2
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• pp.25-32
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• 2002

The velocity and temperature profiles in the cabin of the automobile affect greatly the comfortableness of passengers. In this paper, the three dimensional flow and temperature analysis in the cabin of real automobile have been peformed. The three dimensional Navier-Stokes equation solver was validated by comparing with the other numerical data of a 1/5 scale model. The temperature field of cavity was also analyzed for the validation of energy equation solver. After the code validation, the numerical analysis of real field of flow and temperature of an automobile was peformed and the present result provides the insight of flow and temperature field of the inside of cabin.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.14 no.3
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• pp.122-127
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• 2005

The styling of automobile wheels and their effect on vehicle appearance has increased in importance in recent years. The wheel designer has been given the task of insuring that a wheel design meets its engineering objectives without affecting the styling theme. The wheel and tire system is considered as a vehicle component whose dynamic modal information of the tire/wheel system are employed in the modal synthesis model of the vehicle. The vibration characteristics of a automobile wheel play an important role to judge a ride comfort and quality for a automobile. In this paper, the vibration characteristics of a Al-alloy and steel wheel for automobile are studied. Natural frequency, damping and mode shape are determined experimentally by frequency response function method. Results show that wheel material property, size and design are parameter for shift of natural frequency and damping.

• Journal of Korean Institute of Industrial Engineers
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• v.27 no.1
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• pp.95-102
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• 2001

The design of automobile body assembly line is one of essential parts for improving the process performance. The major objective of this research is to develop a performance evaluation model for automobile assembly line using a closed queueing network(CQN) and simulation method. In this study we used a two-step approach to compute the performance of the assembly line : first, we used CQN model considering assembly line equipments and the line operating time under the assumption of no failure, and second we used a well-known simulator FACTOR/AIM. Finally we implemented this model on a K automobile company and we have shown the sample results of automobile body assembly line.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.537-539
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• 2011

최근의 차량 연비는 엔진, 파워트레인 등 차량의 구성품들을 성능 개선하여 많이 향상 되었으나 연비 측정은 현재도 주어진 모드(LA-4, FTP-75 등)에서 컴퓨터 모의시험 및 다이나모에서 수행한다. 본 논문에서는 차량에 미리 장착된 지리정보데이터와 현재 주행하면서 수신되는 GPS 데이터를 이용하여 약 213Km 영동고속도로를 주행하면서 실제 도로의 연비 향상 방안을 도출한다. 지리정보데이터와 주행하면서 수신한 GPS 데이터 중에서 거리와 고도 데이터를 추출하여 각 구간의 경사도, 주행저항을 계산, 연비향상 알고리즘에 따른 속도 프로파일을 영동고속도로 전 구간에 대해서 완성하고 이 속도 프로파일로 컴퓨터를 이용한 AVL사의 CRUISE 프로그램으로 모의 주행하여 연비를 산출하고 연비 향상 방안을 제안한다.

• Knowledge Management Research
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• v.15 no.2
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• pp.147-164
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• 2014

This paper investigated the efficiency of automobile firms by using several non-parametric approaches. First, using Data Envelopment Analysis (DEA), the paper has investigated the critical factors that determine the relative efficiency of management performance in automobile companies. Second, we examined how the firm size impact on the difference of this efficiency by using Kruskl-Wallis Test. Third, by using Mann-whitney test, we also investigated the difference of the efficiency accoss existence of technological innovation activity. Finally, the paper explored the relationship between technological innovation and management efficiency by using logistic regression model. The findings of this study provided practical information for inefficient automobile firms to find benchmarking firms and strategic position to improve their efficiency. The result also provided theoretical and methodological implications for those who explore factors affecting management efficiencies. Future research directions with the limitation of the study are discussed.

• Resources Recycling
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• v.14 no.3
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• pp.3-5
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• 2005

On July 5,2002 the Law Concerning Recycling of End-of Life Vehicles popularly known as the "Automobile Recycling Law" was enacted in Japan. This paper examines the features of this Law, reasons why the Law was brought into existence, and its predicted impacts on the automobile industry. Pursuant to the Law, the current automobile recycling system was replaced by a new one in January 1, 2005.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.21 no.48
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• pp.323-331
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• 1998

This study aims at the introduction to the recall system and its defence strategies for the automobile industry according to the rights and interests protection for consumers, the trade pressure solution of the United States and government's will for the self-certification. Therefore, I make the following proposal in view of the low technological level of Korea's automobile industry, the imperfect means of recall system, the insufficiency of the social recognition and the worst management condition under the IMF system : First, introduction to three steps for self-certification in case of changing the present pype-approval system into the self-certification and its overall operation after 2003. Second, the defence plan of the automobile industry after analyzing the problems coming from the domestic automobile industry.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.15 no.4 s.97
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• pp.375-381
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• 2005

The purpose of this study is to obtain a foundation data for chassis design and road noise reduction of automobiles. Using the combination of the automobile, radial tires and instrumentation equipment, experimental investigation were carried out to examine the characteristics of the structural vibration of tire as the key to obtaining the effective parameters for reducing road noise. From the results of experimental studies it has been confirmed that the existence of important frequency ranges, which were attributable to the suspension and chassis system. The tire, axle and chassis natural frequency of automobile govern the road noise. Results that material property of tire and experimental condition are parameter for shifting of tire natural frequency, which enables a designer of an automobile to foresee the influence of the various design factors on the road noise.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.1156-1161
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• 2008

Nonlinear dynamic analysis is generally used in automobile crash analysis and structural optimization considering crashworthiness uses the results of nonlinear dynamic analysis. Automobile crash optimization has high nonlinearity and difficulty in calculating sensitivity. Recently the equivalent static load (ESL) method has been proposed in order to overcome these difficulties. The ESL is the static load set generating the same displacement field as the nonlinear dynamic displacement field at each time step in dynamic analysis. From various researches regarding the ESL method, it has been proved that the ESL method is fairly useful. The ESL method can mathematically optimize a crash optimization problem through nonlinear analysis and well developed static optimization. The ESL is applied to nonlinear dynamic structural optimization of the automobile frontal impact problem. An automobile bumper is optimized. The mass of the structure is minimized while some constraints are satisfied.

• Journal of Korea Technology Innovation Society
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• v.5 no.3
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• pp.367-381
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• 2002

This study deals with the technological trends in the automobile recycling technologies. It first discusses the importance and current situation of automobile recycling. And then it discusses the technological trends in automobile recycling industry classifying the technologies into three groups: disassemblying, recycling, and design. It deals with recycling of major parts of automobiles and the design of automobile for recyclability. This study also contains a patent analysis of the technologies. Different patterns in the trend of patents among various conn-tries are discussed with the context of legal and industrial situation of each country And finally it discusses the forecasting for the future technological and legislative trends.