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박은지(Eunji Park),남찬혁(Chanhyuk Nam),고웅희(Woonghee Ko),함규용(Gyuyong Ham),김성훈(Sunghoon Kim),최성욱(Sungwook Choi),이기주(Kiju Lee) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
With the strengthening of international environmental regulations, fuel economy regulations, and rising prices of energy resources, the development of lightweight materials and components for automobiles to improve fuel efficiency is being actively conducted. Compared to passenger cars, commercial vehicles that have a large load and long-distance operation are also developing technologies related to weight reduction to improve fuel efficiency. There is a growing interest in brake products, which are highly lightweight. Currently, the brake system of a medium-large commercial vehicle is shifting from a drum brake to a disc brake system that can provide braking safety and light weight. In the advanced automotive market in Europe, mass production of lightweight products using technologies such as aluminum hubs and dissimilar materials is being developed through new material application and optimal design technology. However, as the brake is a part directly connected to the safety of the vehicle, securing safety is an important factor in product development. In this paper, a model of a commercial vehicle wheel hub module consisting of three parts is presented for light weight, and the structural stability of the proposed lightweight wheel hub module is evaluated through analysis. In addition, the strain generated by the strain gauge was measured using a commercial brake dynamometer. The accuracy of the analytical model was improved through comparison with the analytical model.
박은지(Eunji Park),남찬혁(Chanhyuk Nam),최성진(Sungjin Choi),함규용(Gyuyong Ham),김성훈(Sunghoon Kim),최성욱(Sungwook Choi) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
Recently, interest in fuel economy has been focused, and development of lightweight parts for improving fuel efficiency has been actively under way. In the case of buses or commercial vehicles that have a longer travel distance than cars and frequent loading and boarding, it is necessary to apply technology to reduce fuel consumption. Since the effect of lightweight on the vehicle is greater lower parts than upper parts, lightweight techniques of lower parts such as axles and brakes are being developed. However, the brake is the most important system that is responsible for the safety of the vehicle. So Structural stability should be ensured even if material and structure change occur for lightweight of brake system. In this paper, we tried to evaluate the structural stability of lightweight wheel hub module by braking. The lightweight wheel hub module consist of two part, flange part(aluminium) and disc hub(FCD material). The heat transfer characteristics and deformation of the disc by braking were predicted and the accuracy of the analytical model was improved by comparing the temperature of disc for analysis and test using dynamometer.