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정성필(Sungpil Jung),전갑진(Kabjin Jun),이수호(Suho Lee),우준성(Junseong Woo),박태원(Taewon Park),윤재호(Jaeho Yoon) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is very difficult to estimate the braking performance of a vehicle because brake system includes many parts such as a booster, a master cylinder, a valve and so forth. To calculate the braking characteristics such as braking force through the real vehicle test requires much time and cost. Therefore, the development of the way to estimate the braking performance of a vehicle with computational methods is needed. In this paper, a program which can analyze the whole braking capabilities of a vehicle is presented. Since all input and output data are composed of the Microsoft Excel format, it is easy to manage design data and found the data base. It is considered that the braking characteristics against the variation of booster vacuum pressure are changed when a vehicle is under braking. Furthermore, the additional postprocessor not only makes the graph presentation of the result data but also generates the Excel result files for the report.
차량 공공도로 주행 특성을 적용한 타이어 연비 측정 방안에 대한 연구
조준희(Junhee Jo),정성필(Sungpil Jung),박재현(Jaehyen Park) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
Tire labeling measures the rolling resistance and wet road surface braking force of the tire product and grades them and displays them on the product, so that consumers can consider products with high energy efficiency and excellent performance. that measurements method considers only straightness, This is a measurement method that does not take into account changes in slip angle and camber angle when driving a vehicle. In order to derive the optimal measurement method, the change of slip angle and camber angle is measured through the wheel position measurement on the test car, The tires were mounted on a test device, and a rolling resistance measurement test was conducted using slip angle and camber angle. Propose a reasonable measurement method of combined fuel efficiency of tire by comparing the above items
초고속 타이어 내구 평가법을 활용한 타이어 특성 비교에 관한 연구
박재현(Jeahyen Park),정성필(Sungpil Jung),조준희(Junhee Jo) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
The regulation for evaluating the durability of a tire is a driving test method which considers only a straight run, and has a problem in that it can not take into account the turnaround interval that occurs when the vehicle runs. In order to solve these problems, the "High Speed Tire Durability Evaluation Method" considering the traveling environment of the circuit is used to realize the characteristics of the tires when the vehicle is driven through the room test. We also compare tire performance and durability based on tire internal temperature, air pressure, and tread temperature data.