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브레이크 다이나모미터를 활용한 KIC(Korea International Circuit) 주행 수준의 브레이크 고속 페이드 시험 모드 개발
유덕현(Duckhyun Yu),이필구(Pilgu Lee) 한국자동차공학회 2021 한국 자동차공학회논문집 Vol.29 No.2
In this study, a fade test method was developed in order to reproduce the total braking energy generated by the braking system during KIC driving on a dynamometer. The total braking energy can be derived by calculating the deceleration using the entry speed of each corner and the exit speed and time required after brake braking, and by calculating the braking energy and power generated at this time. In addition, by dividing the total amount of braking energy by the total number of braking, the labor generated during one braking is divided by the total number of braking of the braking dynamometer in order to realize the total working power of the braking energy. In order to match the actual vehicle and brake cooling state, the wind speed was derived by measuring the actual vehicle cooling state for each speed by using the heat transfer function. This has confirmed the possibility of developing the KIC test mode.
함수형 현가장치 모델과 K&C 시험결과의 정합성에 대한 연구
진병옥(ByeongOk Jin),유덕현(DuckHyun Yu),김현일(HyunIl Kim),김기환(GiWhan Kim),이태희(TaeHee Lee) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
In this paper, we compare the characteristics of wheel geometry when wheel is loaded about real vehicle test result and VI-CRT. VI-CRT is capable of modeling based on Vertical, Roll, Steering, Lateral, Longitudinal and Align characteristic of basic measurement test of K&C. In addition, modeling using single travel and single compliance test result is also posssible to improve the analysis accuracy. When the results of the analysis program and the actual vehicle are compared through the K&C test function built into the VI-CRT, We confirmed that the analytical model including single mode shows higher accuracy.
RLD 기반 타이어 연계 쿼터 서스펜션 모듈 특성에 관한 연구
김현일(Hyunil Kim),유덕현(Duckhyun Yu),진병옥(Byungok Jin),김기환(Gihwan Kim),이태희(Taehee Lee) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
The development process of a modern car suspension system consider the target value of the suspension parts characteristics according to purpose of vehicle development. It apply to the design by referring to the benchmark data of the competition vehicle segment and the existing development DB(database). However, it is difficult to predict the actual characteristics of the suspension, so it is necessary to tuning the characteristics of the suspension parts and the specifications of the tires through vehicle tests. A variety of test methods are used for quantitative evaluation, because suspension test is almost subjective test. In this Study, we produce a road test condition by reproducing displacement and load based on RLD measured by vehicle test, and propose a characteristic test method of Tire Coupled Quarter Suspension Module.