A Study on the Low Friction Method of U-joint in R-MDPS System
-A Study to Reduce the Steering Friction Considering Actual Vehicle Conditions-

Jong Min Kim･Tae Kyun Kim･Yoo Sin Kang･Hyung Seok Kim･Ho Young Kim (Hyundai Motor)･Jeong Ho Kuk･Jae Young Noh (Namyang Nexmo)

Many studies for steering u-joint have been conducted to improve torque fluctuation, NVH, strength, etc. However, the friction of U-joint was known to be insignificant, and there was little research on this. This paper newly redefines the U-joint friction effect in the R-MDPS system, It also introduces the friction phenomenon that increases when fastening with other parts. To reduce such friction, the method of optimizing the shape when fastening the bolt is studied using FEA and reviewed the optimal specifications of parts. Finally the steering feeling of the vehicle is improved, so that a big step can be taken.

Vehicle Concept Model Optimization using Skeletonization Algorithm

Hongkyoung Seong (Hyundai Motor)

In order to explore various concepts at early developing stage, vehicle concept models should be fast and adaptable to approve validity of vehicle structures. Rather than detailed and sophisticated 2D shell based Finite Element models, a simple 1D beam structure is suitable for the concept model to deal with rapid changes in the early stage. However, quality and consistency of the concept modeling are highly dependent on operators since the work is done manually. To overcome this dependency, this study suggests the skeletonization algorithm which extracts feature lines from FE models to make 1D beam structure. Furthermore, the concept model optimization is conducted by connecting skeleton structure and cross-section properties.

A Study of Space Structure Node Joint and Interlocking Connection for Micro Factory

Do Hoi Kim･Sung Woo Kim (Hyundai Motor)･Dong Ho Kang･Bahman Morefi (Hyundai Motor Europe Technicla Center)

In this paper, high-strength and rigid body nodes were studied that can replace the steel monocoque and die casting that can be produced in the micro smart factory. The new joint combines the GFRP and AL extrusion structure with tubular steel. The innovative structure can be assembled by bolt and adhesive with the existing body platform while maintaining high-strength and rigidity performance. It is equivalent to the rigidity of die casting and has a cost of 1/3 level of economic type. In addition, A several of interlocking node solution structures also were invented with various ideas to minimize the number of bolts on the body and assembled. the final prototype of the new concept succesfully was tested for assembly.

A Study on Plastic Hybrid Door System for Various Specifications

Je Won Choi･Sang Young Im･Jang Hoo Kim (Hyundai Motor)

Future mobility is likely to have multiple specifications rather than simply one specification for one model by the diverse needs of consumers and there will be a problem of increasing investment cost and development period. To respond to the multi-product and small-volume production system, the new hybrid door system was studied. It is a new paradigm concept that applies a mixture of plastic materials to the existing steel material-based system. Through various analyzes of the TRIZ technique, new ideas for changing and integrating the system structure were derived, and unexpected problems were resolved and verified.

Develop One Surface Frameless Flush Door
-Watertight Resistant Frameless Door-

Hyeong Geun Jo･Kyung Doek Seo･Sang Il Lee･Young Uk Yoon･Dong Min Jeon･Dae Chul Kim･You Chan Park･Hoo Sang Park･In Sun Baik (Hyundai Motor)

Describes a frameless door that is perfect for watertightness and wind noise and glass up and down noise performance. Especially explain how the watertightness performance, which is the weakness of frameless doors, was satisfied. Based on this academic thesis, it can be used as a reference for designing a frameless door that satisfies both appearance and performance.