Recently, as the use of automatic transmissions increases, attention is focused on remanufacturing of automatic transmissions. The automatic transmission includes a clutch, a brake, a planetary gear, and a planetary gear unit, which are power transmission devices, an oil pump and a valve body which are lubricating devices, a controller which is an electronic control device, sensors and switches which input and output the controller. In particular, this study is a basic study for remanufacturing such as disassembling, assembling, and inspecting element parts for manufacturing valve body material which is a core part of automatic transmission.

Assembly of automobile interior materials is very important for assembly and inspection such as sensitivity and noise reduction. Particularly, since assembling parts of automobile interior parts is manually assembled by a worker, a claim due to poor assembly sometimes occurs. In addition, as the labor cost rises, automobile assembly line adopts automatic assembly device as the concept of smart factory in assembly process. Therefore, in this study, we intend to develop automatic assembly device of the door trim for reducing the field claim, improving the productivity, and reducing the assembly failure.

A steering knuckle for a car is a key part of a corner module and is a functional part connected to steering, suspension, and braking devices. Steering knuckles are used for various types of forging and machining methods such as casting forging, aluminum forging, etc. to perform productivity and quality. Therefore, in this study, we study about the development of the overall design of the steering knuckle in the production and supply of the steering knuckle for the product processing method, quality, assembly inspection, etc. through the modeling and analysis of the steering knuckle.

The diesel engine generate many pollutants such as PM(Particulate matter) and NOx(Nitrogen oxide). So the SCR(Selective catalytic reduction) must be required to meet the emission standard. The SCR catalyst market is growing rapidly, and the automobile markets using alternative energy sources are growing rapidly. This study deals with optimization of the calcination process the manufacturing process of SCR catalyst to be competitive. The calcination process is a bottleneck and it is required to optimize productivity and accept to be safety, But we cannot trade off anything in terms of safety. We applied DOE(Design of experiments) among many research methods performed in various fields. In order to achieve quality and productivity optimization. The dependent variables in the DOE were selected as NO Conversion(%). The independent variables were selected as the calcination temperature, soaking time and fan speed RPM. the CCD(Central composite designs) constructs response surface using the data onto experience and finds optimum levels within the fitted response surfaces. Our tests are our stability guarantee and efficient together with operation.

In the modern industrial period, the introduction of mass production was most important progress in civilization. Die-casting process is one of main methods for mass production in the modern industry. The aluminum die-casting in the mold filling process is very complicated where flow momentum is the high velocity of the liquid metal. Actually, it is almost impossible in complex parts exactly to figure the mold filling performance out with the experimental knowledge. The aluminum die-castings are important processes in the automotive industry to produce the lightweight automobile bodies. Due to this condition, the simulation is going to be more critical role in the design procedure. Simulation can give the best solution of a casting system and also enhance the casting quality. The cost and time savings of the casting layout design are the most advantage of Computer Aided Engineering (CAE).. Generally, the relations of casting conditions such as injection system, gate system, and cooling system should be considered when designing the casting layout. Due to the various relative matters of the above conditions, product defects such as defect extent and location are significantly difference. In this research by using the simulation software (AnyCasting), CAE simulation was conducted with three layout designs to find out the best alternative for the casting layout design of an automotive Oil Pan_BJ3E. In order to apply the simulation results into the production die-casting mold, they were analyzed and compared carefully. Internal porosities which are caused by air entrapments during the filling process were predicted and also the results of three models were compared with the modifications of the gate system and overflows. Internal porosities which are occurred during the solidification process are predicted with the solidification analysis. And also the results of the modified gate system are compared.

This study investigates the optimization of sectional shape with two dimensions on the rubber gasket of electric vehicle battery in order to maintain the airtightness and watertightness. For the section optimization, the shape of protruding section was analyzed as design variables and the design point was composed by the design of experiment(DOE) for the selected protruding shape. The uniaxial tensile test was carried out for the analysis of rubber gasket and five parameters of Mooney-Rivlin hyperelastic model were derived from the test data in order to construct the strain energy function for nonlinear behavior. The rubber gasket compression analysis was performed by using ANSYS of a commercial software and the performance of optimal shape was verified by performing the tests of watertightness and airtightness on the 3D rubber gasket with the derived section.

For the automotive application, graphene-glass composites were fabricated using E-glass fiber(GF) coated with various types of graphene nanosheets deposited by electrophoretic deposition. Graphene oxide(GO) was first synthesized using a modified Hummer’s method and its subsequent ultrasonic treatment in deionized water produced a stable stop of the GO. Glass fiber was immersed in water and GO suspension near the copper anode. The potential applied between the electrodes caused the GO to move toward the anode. In addition, the GO coated yarn was exposed to hydrazine hydrate at 100℃ to obtain a reduced graphene oxide(rGO) coating yarn. Both GO and rGO coated glass fiber yarns were used to fabricate unidirectional epoxy-based multi-scale composites by passive lay-up. The presence of a conductive rGO coating on glass fiber improves both the electrical conductivity and thermal conductivity of the composite. In addition, rGO-based epoxy-glass composites have been used to improve the dielectric constant, providing the option of using this structure for electromagnetic interference shielding.

Hot forging is widely used to manufacture many industrial parts such as machine, automotive and so on. It is important to simulate the relations or characteristics between preform and die before designing the die. The purpose of this study is to investigate the forging characteristics of parking gear with nonlinear gear groove, thus the behaviors of preform can be predicted in advance and finally they can be applied to die design. As the results, since the distributions of high effective strain rate of parking gear were less than 3%, it was predicted that the manufacturing of parking gear with nonlinear gear groove might be possible. Furthermore it was observed that, in this study, the effective stress of bottom die was lower than that of top die.

High performance lithium-ion batteries (LIBs) have attracted considerable attention as essential energy sources for high-technology electrical devices such as electrical vehicles, unmanned drones, uninterruptible power supply, and artificial intelligence robots because of their high energy density (150-250 Wh/kg), long lifetime (> 500 cycles), low toxicity, and low memory effects. Of the high-performance LIB components, cathode materials have a significant effect on the capacity, lifetime, energy density, power density, and operating conditions of high-performance LIBs. This is because cathode materials have limitations with respect to a lower specific capacity and cycling stability as compared to anode materials. In addition, cathode materials present difficulties when used with LIBs in electric vehicles because of their poor rate performance. Therefore, this study summarizes the structural and electrochemical properties of cathode materials for LIBs used in electric vehicles. In addition, we consider unique strategies to improve their structural and electrochemical properties.

In the power steering systems used for automobiles, because of its small size and low noise, a balanced type hydraulic vane pump is mainly used as a power source. Therefore it is requested to research on the lubrication characteristics of a oil hydraulic vane pump which is the key part to improve its performance. The performance of a oil hydraulic vane pump is influenced by the lubrication characteristics of the critical sliding components. Thus, lubrication characteristics between the shaft and the journal bearing have to be researched for the design and the performance improvement of a oil hydraulic vane pump. Therefore, in this paper, it is theoretically investigated that the lubrication characteristics between the shaft and the journal bearing of a balanced type oil hydraulic vane pump for power steering systems. The results demonstrate that lubrication characteristics are significantly influenced by the clearance between the shaft and the journal bearing.

A study on the weight reduction of a motor shaft in electric vehicle by using optimum design technique was carried out. The structural analysis of a motor shaft was performed by using ANSYS to investigate the structural safety. We also used HEEDS to find the optimal hollow shaft thickness. When the material of the hollow shaft is changed to SCM822H by using ANSYS 14.5 and HEEDS MDO, the weight could be reduced by about 53 % compared to the conventional solid one. From this study, the optimized dimensions of a hollow shaft were determined for light weight design.

딥러닝에 기반 한 인공지능과 다양한 센서기술의 발전이 빠르게 진행 되면서 운전자 없이도 도로를 주행할 수 있는 자율주행 기술을 가능하게 하고 있다. 이러한 상황에서 미국을 비롯한 선진 각국은 자율주행자동차의 상용화를 촉진하기 위해 기존의 법규와 제도를 바르게 개선하고 있으며, 예상되는 자율주행자동차의 사고 가능성에 대비하여 관련 법 개정은 물론 현재 진행 중인 실험 자율주행 차량에 대해서도 책임 범위의 명확한 한계와 신속한 피해구제를 위해 다양한 노력을 펼치고 있다. 그러나 앞으로 자율주행자동차의 상용화가 이루어지면 보험사기 역시 더욱 복잡하고 지능화될 것으로 예상됨에 따라 보험사기에 대처하는 방향 역시 지금과는 다른 모습으로 바뀌어야 할 것이다. 우선, 보험 경영학 측면에서 보다 적극적인 홍보 및 교육이 요구된다. 매체 접촉률이 높은 동영상 위주의 홍보와 함께, 보험 계약 시의 법정 의무교육 등의 제도 도입이 요구된다. 한편으로 보험사기에 대처하기 위한 DB의 구축과 보험 사기범에 대한 운전면허의 중지나 금융 거래 및 해외 출국금지 등의 강도 높은 제재방안도 검토해야 할 것이다. 또한, 자율주행자동차 사고는 매우 복잡하고 난해한 사고가 많아지기 때문에 새로운 보험제도 도입의 필요성이 있는데, 이 새로운 보험제도는 피해자 보호에 너무 치중하는 나머지 보험사기에 쉽게 노출될 수 있다는 단점을 보완해야 한다. 이런 문제점들을 해결하기 위해서는 사이버 보안에 있어 전문 인력의 확충과 양성을 통한 조직적이고 전문적인 조사와 수사체계를 구축해야 할 것이다. 더불어서 자율주행자동차 사고 보험사기 조사 조직을 일원화하고 일선 수사기관에 전담조직을 설치 운영함으로써 보험사기를 미연에 방지하려는 노력이 필요하다. 이러한 노력이 결실을 이룬다면 보험사기로 인해 낭비되는 사회적 비용의 절감과 더불어 선량한 보험계약자의 피해를 최소화 할 수 있을 것이다.