Abstract
The purpose of this study is to grasp the actual variation in the inflation pressure of large sized off- the- road pneumatic tires. So far the inflation pressure of a tire was regarded as in constant under operation. In this research, the variation of inflation pressure was investigated in detail for a period of five hundred days. It was observed that the variation of the inflation pressure is accompanied by the variation of the temperature near the tire carcass. Furthermore, it was verified that the variation in the inflation pressure causes changes of load capacity, profile, contact pressure distribution and form of wear. As a result, that the air pressure fluctuation could be controlled by using heat insulator between air layer and carcass. In addition to the aspect of conventional inflation pressure control, the research also involves various aspects of tire performances.
