Dynamic tire inflation pressure loss rates

Studies of the relationship between tire pressure and rolling resistance have relied on static testing of inflation pressure loss rates (IPLR). In order to examine the pressure loss and resulting changes in the rolling resistance of tires under conditions that more closely resemble tires when used in service, a new multistep roadwheel test procedure was investigated. Six tires with known ASTM F1112 IPLR (static) and ISO 28580 rolling resistance coefficient (RRC) values were selected in order to develop this Dynamic IPLR test. Testing consisted of obtaining tire pressure values during operation on a 1.707-meter laboratory roadwheel.