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박세종(Sejong Park),서호철(Hocheol Suh) 한국자동차공학회 2005 한국 자동차공학회논문집 Vol.13 No.1
The exhaust system of automobile is faced with random or spectrum types of fatigue loads during usage life and so needs to be closely estimated for quality and performance to have enough certainty on design endurance life during preliminary design process. Structural operation conditions, operation load history, property of material and manufacturing process etc. should be considered by performing experiment approach. Using the software program for predicting fatigue life quickly and exactly in preliminary design stage saves plenty of time and cost generated by fatigue tests. In this paper, fatigue life prediction was performed on the basis of fatigue analysis using MSC/FATIGUE and load data from field test and the life of development items was estimated and compared through the results.
박세종(Sejong Park),박경석(Kyungsuk Park),서호철(Hocheol Suh) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The exhaust system of automobile is faced with random or spectrum types of fatigue loads during usage life and so needs to be closely estimated for quality and performance to have enough certainty on design endurance life during preliminary design process. Structural operation conditions, operation load history, property of material and manufacturing process etc. should be considered by performing experiment approach. Using the software program for predicting fatigue life quickly and exactly in preliminary design stage saves plenty of time and cost generated by fatigue tests. In this paper, fatigue life prediction was performed on the basis of fatigue analysis using MSC/FATIGUE and load data from field test and the life of development items was estimated and compared through the results.
반능동형 배기머플러의 배압특성 및 엔진성능에 미치는 영향
박대언(Daiun Park),박경석(Kyoungsuk Park),박세종(SeJong park),손성만(Sungman Son) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
Recently, Automobile manufacturers regarding stability, economic environmental-friendly problems by the development of the road, supply of the automobile, environmental problem as designing the exhaust system. Increasingly strict environmental regulations to lower fuel consumption and reduce emission. Also to reduce the noise and the vibration of the automobile. According to develop variable type muffler, dual muffler and active intelligence exhaust system unit. Improvement in engine performance and fuel consumption rate demand information of pressure fraction and heat characteristics. To be able to determine these factor for we experiment on each case of exhaust system unit. In this study, how back pressure is distributed in flow-through adapted semi-active muffler in exhaust system and components.and how to design muffler flexibleness, efficiency, lower back pressure and optimal performance. This study furnish basic data for engineers, technicians.
아이들링時 排氣시스템의 排壓特性이 엔진性能에 미치는 影響
박경석(Kyoungsuk Park),박세종(Sejong Park),박대언(Daiun Park),손성만(Sungman Son) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is necessary to consider the stability, economic environmental-friendly problems by the development of the road, supply of the automobile, environmental problem as designing the exhaust manifold system. To reduce the noise and the vibration of the automobile, it is needed to consider the pulsation noise, air current noise, vibration of air pipe which generate the intake and exhaust noise of the automobile. Moreover, the discharge sound, intake sound, radiation sound, transmitted sound are occurred. To reduce this influence, the variable valve is needed and to control these factor, path transformation muffler and active type muffler are needed. But engine efficiency could be reduced with this transformation, and resistance by the pressure, thermal property. In this study, in order to establish the optimized conditions design factors which are taking many performance as the variable valve, it shows how the standard performance and the additional element of the exhaust manifold system effects on the engine performance.
박대언(Daiun Park),박경석(Kyungsuk Park),박세종(Sejong Park),손성만(Sungman Son) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
The muffler to reduce the exhaust noise and vibration from engine influence on the engine performance. Recently, exhaust variable valve setting up in the muffler controls the backpressure in the exhaust system. And the backpressure variation according to the exhaust variable valve opening develop the engine performance.<br/> First, the preceding of structural analysis is needed and simulation experiment is requested for the study on the design factor to influence on the operation of the exhaust variable valve.<br/> In this study, setting up the various variables according to each composition element needed tor the structural analysis of the exhaust variable valve, it is experimented the analysis on the influence of each design factor with the calculation of stress distribution and the displacement to cause about the back pressure for the valve through parameter study.
박경석(Kyoungsuk Park),박세종(Sejong Park),박대언(Daiun Park),손성만(Sungman Son) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is necessary to consider the stability, economic environmental-friendly problems by the development of the road, supply of the automobile, environmental problem as designing the exhaust manifold system. To reduce the noise and the vibration of the automobile. The need for stricter regulation limits emission and demand for lower fuel comsumpion. According to develop variable type muffler, dual muffler and active intelligence exhaust system unit. Improvement in engine performance and fuel consumption for demand information of pressure fraction and heat characteristics. To be able to determine these factor for we experiment on each case of exhaust system unit. <br/> In this study, in order to establish the optimized conditions design factors which are taking many performance as the variable valve, it shows how the standard performance and the additional element of the exhaust manifold system effects on the engine performance.
반능동형 배기머플러가 배압특성 및 엔진성능에 미치는 영향
박대언(Daiun Park),박경석(Kyoungsuk Park),박세종(Sejong Park),손성만(Sungman Son),한창평(Changpyung Han) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Automobile manufacturers regarding stability, economic environmental-friendly problems by the development of the road, supply of the automobile, environmental problem as designing the exhaust system. Increasingly strict environmental regulations to lower fuel consumption and reduce emission. Also to reduce the noise and the vibration of the automobile. According to develop variable type muffler, dual muffler and active intelligence exhaust system unit. Improvement in engine performance and fuel consumption rate demand information of pressure fraction and heat characteristics. To be able to determine these factor for we experiment on each case of exhaust system unit. In this study, how back pressure is distributed in flow-through adapted semi-active muffler in exhaust system and components.and how to design muffler flexibleness, efficiency, lower back pressure and optimal performance. This study furnish basic data for engineers, technicians.
박경석(Kyoungsuk Park),박세종(Sejong Park),손성만(Sungman Son) Korean Society for Precision Engineering 2005 한국정밀공학회지 Vol.22 No.6
Recently, Automobile manufacturers regarding stability, economic environmental-friendly problems by the development of automobile. This reason is increasingly strict environmental regulations to lower fuel consumption and reduce emission. Designing more efficient and low emission control exhaust system results in more efficient performance, reduced back pressure and higher convert efficiency. Also to reduce the noise and the vibration of the automobile. According to develop variable type muffler, dual muffler and active intelligence exhaust system unit. Improvement in engine performance and fuel consumption rate, higher conversion efficiency demand information of pressure fraction and heat characteristics. To be able to determine these factor for we experiment on each case of exhaust system unit. In this study, how back pressure is distributed in flow-through in exhaust system and how to design exhaust system flexibleness, efficiency, lower back pressure and optimal performance. This study furnish basic data for engineers, technicians.
배기 가변 밸브를 적용한 소음기의 배압특성 및 엔진 성능에 관한 연구
박경석(Kyoungsuk Park),박세종(Sejong Park),서호철(Hochul Suh),손성만(Sungman Son) Korean Society for Precision Engineering 2006 한국정밀공학회지 Vol.23 No.7
Recently, Automobile manufactures have developing automotive exhaust system under consideration for improvement in engine performance. It thus develop many exhaust components. For example active muffler, semi-active muffler, electronic muffler etc. In this components consider enhanced back pressure and reduction noise. Especially, In recent years it develop the study of semi-active muffler. Semi-active muffler is simple structure and excel performance. Recently many forms semi-active muffler was developed and adopted to the actual use in consideration of cost and technical side for noise and vibration. This study had main objects about the recently developed the semi-active muffler. It was to show its combustion performance as well as its enhanced back pressure characteristics in design. Therefore if the precise analysis of the combustion pressure according to the back pressure transmission was carried out, it was understood that this study would be utilized in the design of the exhaust system such as the semi-active muffler.