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권영웅(Y. W. Kwon) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The main advantages of the Dry CVT with V-belt, which has been popular in Asia, are a simple mechanism, less maintenance and low cost. The important factors which have an influence on the performance of the CVT are the weight of the centrifugal roller, the change of axial distance and spring force. Based on an experiment, the effects of load torque, speed ratio, and revolution of both the driving pulley and the driven pulley during the alteration of the axial distance, roller weight and spring constant were studied.
박성천(S. C. Park),정상훈(S. H. Jung),권영웅(Y. W. Kwon) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
An analytical study was performed to have temperature and thermal stress distribution on a piston with the change of the 2nd land length of a piston and the existence of knocking in a cylinder. The result showed that the temperature on the skirt region was about 4~10℃ higher than the temperature on the pin region. However the thermal stress on the skirt region was about 4㎫ lower than on the pin region. It may be due to the higher heat release rate on the pin boss than on the skirt. The result regarding the variation of the 2nd land length of the piston showed that the temperature distribution on the piston was getting lower and the thermal stress distribution was getting higher as the 2nd land length of the piston was shorter. As knocking occurred on the skirt region, it had the higher thermal stress distribution on the piston than on the pin region. It is due to the higher temperature and temperature gradient occurred on the piston as the knocking started on the skirt.
함성훈(S. H. Ham),권영웅(Y. W. Kwon) 한국동력기계공학회 2008 한국동력기계공학회 학술대회 논문집 Vol.2008 No.11
Over the past years, many research works have been carried out to investigate tho factors which govern the performance of diesel engine. The air pollutant emission from the diesel engine is still a significant environmental concern in many countries. In the present study, new system of particulate matter reduction of diesel engine is proposed. This new system is using vacuum equipment and filter included moisture for capture particulate matter. To verificate new system experiments are performed at diesel engine. As a result it is founded that particulate matter is decreased.