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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Transactions of the Korean Society of Automotive Engineers
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Journal DOI :
The Korean Society of Automotive Engineers
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Volume & Issues
Volume 23, Issue 6 - Nov 2015
Volume 23, Issue 5 - Sep 2015
Volume 23, Issue 4 - Jul 2015
Volume 23, Issue 3 - May 2015
Volume 23, Issue 2 - Mar 2015
Volume 23, Issue 1 - Jan 2015
Selecting the target year
A Study on the Reinforcement of the Combat Support System by the Platform Standardization of Military Vehicles
Kim, Myungsup ; Kim, Kitak ; Jung, Dohyun ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 247~253
DOI : 10.7467/KSAE.2015.23.3.247
Platform standardization is widely used in commercial auto industries and other industries to acquire cost reduction as well as high reliability. This paper reviews some application examples and estimates expected effect of Korean army's platform standardization for combat system and combat support system. Also, military platform standardization based on utilization of commercial vehicles has been studied with the standard vehicles used in Korean army. It is estimated that outstanding results may be achieved if a dual platform, the public and military platforms, is utilized. So, when the strategy of the military transportation system is decided, "dual use" concept is necessary and this could maximize the effect of the military strategy reinforcement.
Three-dimensional Crush Measurement Methodologies Using Two-dimensional Data
Han, Inhwan ; Kang, Heejin ; Park, Jong-Chan ; Ha, Yongmin ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 254~262
DOI : 10.7467/KSAE.2015.23.3.254
This paper presents 3D collision deformation modelling methodologies using photogrammetry for reconstruction of vehicle accidents. A vehicle's deformation shape in collision provides important information on how the vehicle collided. So effective measurement(scanning) and construction of a corresponding appropriate model are essential in the analysis of collision deformation shape for obtaining much information related to collision accident. Two measurement methods were used in this study: Indirect-photogrammetry which requires relatively small amount of photos or videos, and direct-photogrammetry which requires large amount of photos directly taken for the purpose of 3D modelling. When the indirect-photogrammetry method, which was mainly used in this study, lacked enough photographic information, already secured 2D numerical deformation data was used as a compensation. This made 3D collision deformation modelling for accident reconstruction analysis possible.
A Study on the Injection Characteristics of Diesel-water Emulsion Fuels according to Compositions
Woo, Seungchul ; Kim, Hyungik ; Park, Jangsoo ; Lee, Kihyung ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 263~270
DOI : 10.7467/KSAE.2015.23.3.263
Using Diesel-Water Emulsion fuel in commercial diesel engine can reduce NOx and soot when it is injected through the injector. Because water in Diesel-Water Emulsion fuel is vaporized ahead of diesel particle and it cause decrease of combustion temperature. Furthermore, research about the possibility of applicating Diesel-Water Emulsion fuels to commercial diesel engine is demanded in order to prove that Diesel-Water Emulsion fuel is able to apply commercial diesel engine without any replacement of equipments. This research analyzed applicable possibility of Diesel-Water Emulsion fuels to commercial diesel engine's fuel injection system refering injection and spray characteristics. In this research, there are 3 experiments, that is injection quantity, spray visualization, and injection rate. Diesel-Water Emulsion fuel has less injection quantities compared to diesel fuel, and spray penetration length is more longer than diesel. Furthermore, emulsion fuels have less dispersed than diesel fuel. In conclusion, comparing with diesel fuel with only spray characteristics, Diesel-Water Emulsion fuel has bad effects about dispersion and vaporization.
Development of the Vehicle Diagnosis Program Using OBD-II
Yoo, Changhyun ; Ko, Yongseo ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 271~278
DOI : 10.7467/KSAE.2015.23.3.271
This paper develops an OBD Diagnostic Program (Program) using Visual Studio (C#), which was used to diagnosis malfunction information from OBD-II system vehicles. We accomplished this using the Program, Diagnostic tests, Board (STN1110), FTDI Basic Cable, Mini USB Cable, OBD Data Cable, and both hybrid and regular vehicles. The Program tests real-time data output, DTC output, sensor value output, engine RPM, waveform data, OBD type check, PID inspection, and whole monitoring. We found vehicles used in this research had 19 PIDs, which was within OBD-II regulations. We also gathered data on control and diagnostic code regulated by OBD-II system, such as, sensor output value, engine RPM, DTC output, each PID analytic value, OBD type, fuel mode, and whole monitoring result value. Using the data collected through the Program appropriately can lead to more effective diagnostic practices and contribute to education.
A Study on the Development of Electric Resistance Welding of DP780 Grade Steel for Hydroforming Tube
Park, Sungpill ; Kwon, Yongjai ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 279~286
DOI : 10.7467/KSAE.2015.23.3.279
To achieve lightweight design, research & development of various lightweighting technologies such as hydroforming are underway worldwide. In the case of hydroforming, application of ultra high strength steel is essential for weight reduction of the car. However, considering common high-strength carbon steel, it is not suitable to the actual hydroformed parts since the lack of formability. DP steel offers an outstanding combination of strength and formability as a result of their microstructure. DP steel has high strength and good formability but it's difficult to secure stable quality of welding section because of softening of weld section and chemical composition. Therefore, most of companies use LASER welding when making high strength tube. Electric resistance welding is excellent production method for steel tube manufacturing considering the productivity. Optimum electric resistance welding technology is needed to be developed for application of high strength hydroformed parts using DP steel. This study is comprehensive research & development from electric resistance welding to actual formabililty evaluation.
Thermal Stress Analysis of Disk Rotor by Configuration of Bike Brake
Han, Moonsik ; Cho, Jaeung ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 287~291
DOI : 10.7467/KSAE.2015.23.3.287
This study investigates the result of thermal stress analysis on disk rotor by classes at bike brake. In the analysis result of thermal deformation at the steady state, maximum deformations at models 1, 2 and 3 are 0.14347mm, 0.15823mm and 0.16028mm respectively. The deformation becomes larger as the field goes on from the center to the outside at disk rotor. As there are models 1, 2 and 3 in the order of maximum deformation, model 1 has safest among three models. In the analysis result of thermal stress at steady and transient states, there are models 1, 2 and 3 in the order of maximum stress. Model 1 becomes most excellent on strength and safety among three models. By using the analysis result of disk rotor model at bike disk, it is possible to design the model applied practically at the safe driving of bike.
Development of Contact Pressure Analysis Model of Automobile Wiper Blades
Lee, Sangjin ; Noh, Yoojeong ; Kim, Kyungnam ; Kim, Keunwoo ; Jang, Youngkeun ; Kim, Kwanhee ; Lee, Jaecheon ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 292~298
DOI : 10.7467/KSAE.2015.23.3.292
A wiper is a safety device removing rain and debris from windshield and ensuring visibility of drivers. If contact pressure distribution between rubber of the blade and the windshield is unbalanced, unwanted noise, vibration, and abrasion of the blade can occur and sometimes fatal accidents could occur. To improve the safety of the wiper, there have been many researches on the contact pressure analysis of the wiper, but the analysis results were not converged or require much computational time due to material nonlinearity of the rubber and contact conditions between the blade rubber and the windshield. In this research, a simple model with 1D beam and 2D shell elements was used for the contact pressure analysis instead of the 3D blade model. The simplified model saved computational time of the analysis and resolved convergence problems. The accuracy of the analysis results was verified by comparing them with experimental results for different rail spring curvatures.
Characteristics of Transient Performance in a Turbocharged GDI Engine with TiAl Turbine
Park, Chansoo ; Jung, Jinyoung ; Bae, Choongsik ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 299~306
DOI : 10.7467/KSAE.2015.23.3.299
Turbocharged gasoline direct injection engine is one of promising technologies in the automotive industry. However, reduction in turbo-lag under transient operation is one of important challenging points to improve drivability. Engine transient performance was investigated in a 4-cylinder 2.0 L turbo-gasoline direct injection (T-GDI) engine using Inconel and TiAl (Titanium Aluminide alloy) turbine wheel turbochargers. The TiAl turbocharger performed superior transient boost pressure and torque rises under various engine transient operation conditions. These were mainly due to lower turbine rotational inertia of TiAl turbocharger. The Maximum boost pressure and torque build up were founded in 1500 rpm and 2000 rpm, instant load change from 20% to 100% of pedal position.
A Study on the Impact of Fuel Economy as Tactive Resistance Calculation Methods on HD Chassis Dynamometer for Medium-heavy Duty Vehicle
Lee, Iksung ; Seo, Dongchoon ; Kim, Soohyung ; Ko, Sangchul ; Chun, Youngwoon ; Cho, Sanghyun ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 307~314
DOI : 10.7467/KSAE.2015.23.3.307
The purpose of this study is know the fuel economy of difference tractive resistance calculation methods on light duty low-floor bus. Two tractive resistance calculation methods(coastdown test and JFCM conversion formula) are tested to understand the difference of fuel economy. JFCM was developed for fuel economy regulations of heavy duty vehicle. That show a big difference as a result of the calculation using coastdown test and JFCM conversion formula. The difference of the tractive resistance affects the fuel economy.
Study on the Prevention of Patent Disputes through Network Analysis - Focusing on NPEs in Smart Car Industry -
Ryu, ChangHan ; Suh, Minsuk ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 315~325
DOI : 10.7467/KSAE.2015.23.3.315
Smart Car market has been experiencing continuous growth to drive leading companies in automotive and IT industries to focus on advancing related technologies. As the IT technologies fuse into automotive technologies, the patent litigation has been showing changes. One of the prominent changes in patent litigation pattern of Smart Car field is the increased activities of the Non-Practicing Entities (NPEs), whose main field has been the IT area. However, the automotive companies have been mainly focusing on preventing patent disputes against competitors through trend analysis, which caused them to become relatively vulnerable to the attacks from NPEs. In this study, we developed a methodology for monitoring and analyzing the activities of NPEs using network analysis tools to suggest effective strategies for manufacturing companies to fortify their ability to respond against unanticipated attacks. Our methodology, which is developed for the Smart Car field, can also be useful for other fields such as IT and electronics.
Analysis of the Fuel Consumption and the Development of the Analysis Model of the Hybrid Tractor
Kim, Dongmyung ; Kim, Soochul ; Lee, Sangheon ; Kim, Yongjoo ; Jnag, Joosup ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 326~335
DOI : 10.7467/KSAE.2015.23.3.326
In this paper, is a study that analyzed the fuel consumption of hybrid tractor. Testing and analysis in order to evaluate the fuel consumption was performed. Analysis model was developed by using the SimulationX that is a commercial software. Also, map of the analysis model was modeled on the basis of test data. Test was performed using a dynamo device. The engine was tested the fuel consumption in accordance with the conditions on the load and throttle opening. The battery was tested the discharge and charge in accordance with the current amount. We verified the reliability of the analysis model by comparing the analysis results with the rest results. After considering the reliability of each analysis model was extended to the entire hybrid tractor system. To evaluate the efficiency using the analysis model, compared the fuel consumption of general tractor with hybrid tractor in the same load conditions.
Light-weight Design of a Korean Light Tactical Vehicle Using Optimization Technique
Suh, Kwonhee ; Song, Bugeun ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 336~343
DOI : 10.7467/KSAE.2015.23.3.336
One of various main jobs in the design of a new tactical vehicle is to develop the lightest chassis parts satisfying the required durability target. In this study, the analytic methods to reduce the size and weight of a lower control arm and chassis frame of a Korean light tactical vehicle are presented. Topology optimization by ATOM (Abaqus Topology Optimization Module) is applied to find the optimal design of the suspension arm with volume and displacement constraints satisfied. In case of chassis frame, the light-weight optimization process associated with design sensitivity method is developed using Isight and ABAQUS. By these analytic methods we can provide design engineers with guides to where and how much the design changes should be made.
Comparison in Braking Force Characteristics for the Static and Dynamic Braking Force Inspection System about Vehicles in Service
Oh, Sangyeob ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 344~351
DOI : 10.7467/KSAE.2015.23.3.344
Braking force inspection of vehicles in service is certainly one of the most important characteristics that affect vehicle safety. Up to now, in domestic country, the regular safety inspection of vehicles in service has been tested with a roller type brake test (a static braking force inspection system). But, in EU and USA etc. in recent years, it has been tested with a plate type brake test (a dynamic braking force inspection system). In this study, to compare the characteristics of above two test systems, the correlations for the results of braking force are evaluated statistically. As the results, in the case of main braking force, the range of the
of the deviation for the left and right side is 0.5386 ~ 0.6231 in the rear axle and 0.0032 ~ 0.0052 in the front axle respectively, then the
in the front axle is lower than that in the rear axle and the total variation is unexplained by the least-squares regression line statistically. Also, the p-value for the deviation of the left and right in the front axle is 0.4839 ~ 0.5755, then it has nonsignificant in the front axle. Therefore, the static braking force inspection system can not reflect the inertia force that there is a load transfer from the rear axle to the front axle during braking. Accordingly, it is necessary to adopt the dynamic braking force inspection system which can reflect the inertia force on the regular vehicle safety inspection in domestic country.
A Study on Structural Safety Analysis of Hub Space
Han, Moonsik ; Cho, Jaeung ;
Transactions of the Korean Society of Automotive Engineers, volume 23, issue 3, 2015, Pages 352~359
DOI : 10.7467/KSAE.2015.23.3.352
This study investigates the analysis result of structure and fatigue due to the models of the hub space with bolt joint at wheel and the existence or nonexistence of hub ring as the part of suspension system of vehicle. As the static analysis result, the structural vulnerability can be found at hub bolt and the center of wheel at three models. Model 2 and 3 have nearly same deformation and model 1 can be endured at the least load among three models. As the fatigue analysis result, fatigue lives of three models are same at the severest load of SAE bracket history. As many screw threads of weak bolts are jointed in case of model 1, model 1 is shown to be the weakest at fatigue damage among three models. By the result of this study, model 1 with bolt joint becomes most weakest among three models. As model 2 with no hub ring and model 3 with hub ring have the nearly same states of analysis results, hub ring is shown to have no influence on the safety of automotive driving.