http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이호근(Hoguen Lee),홍승준(Seungjun Hong) 한국자동차공학회 2009 한국 자동차공학회논문집 Vol.17 No.6
Inflation pressure retention is an important property of tire performance because under-inflation can adversely affect tire tread life, handling, fatigue durability, rolling resistance. General test method for evaluation of tire inflation pressure retention is based on ASTM. This method is testing for rate of pressure loss under static conditions without load. In this study air permeation test is done under 3 conditions which include load and rolling effects. Results show rolling conditions cause rapid permeation. To verify the results, measured air temperature of rolling tire. Other study on tire inflation pressure property are correlation study between exterior temperature and tire pressure and measurement of permeation rate of varied level of tire inflation. From the results data we estimated seasonal change can cause large variation of tire inflation pressure.
홍승준(Seungjun Hong),이호근(Hoguen Lee) 한국자동차공학회 2005 한국 자동차공학회논문집 Vol.13 No.6
In domestic replacement tire market, imported tires are increasing condinuously. Because there is no institute officially investigating tire safety and performance, domestic drivers can be exposed to defective tires with no regulations. In this study we performed investigation of replacement tire market status and amount of imported tires. Over 90% of imported tires are for passenger car and the number of total imported tires is increasing in recent years. Low price tires imported from Southeast Asia and China are selected to evaluate quality level. Basic inspection, indoor test, outdoor test, material test are conducted to evaluate the selected tires and compared with tires of domestic maker. From test results quality level of the selected tires could be found.
공기압에 따른 타이어의 안전성 및 경제성에 관한 실험적 연구
홍승준(Seungjun Hong),이호근(Hoguen Lee) 한국자동차공학회 2010 한국 자동차공학회논문집 Vol.18 No.1
Many vehicles have significantly under-inflated tires, primarily because drivers infrequently check their vehicles’ tire pressure. When a tire is used while significantly under-inflated, its sidewalls flex more and the tire temperature increases, increasing stress and the risk of failure. In this study we evaluated tire safety and economical efficiency at various inflation pressure. For tire safety we performed FMVSS indoor durability test, measurement of rolling tire temperature, braking performance at dry/wet road condition, and rolling resistance test for economical efficiency. Results show that low pressure decreases tire durability of both speed-increase condition and load-increase condition. Heat temperature of rolling tire increases as pressure decreases and significantly under-inflated tires cause increase of vehicle’s stopping distance at wet road condition. Also Under-inflation increases the rolling resistance of a tire and, correspondingly, decreases vehicle’s fuel economy.