A tire air pressure monitoring system for motorcycles was developed. The system informs a rider of low air pressure or an air leak in the tire. High monitoring accuracy was obtained by compensating for the temperature of the air pressure, by measuring air pressure in the tire, by changes in pressure and temperature during running, and by the lowering of air pressure in the case of a flat tire. An air leak is judged by the speed of the air leak converted from an air pressure change and temperature change. The adjustment of the unbalanced revolution of wheels was minimized by mounting a separated tire valve and sensor. Indication of the air pressure and an alarm is for enhancing the rider’s recognition during running.
Article of Honda R&D Technical Review Vol.14 No.2 (151 - 158)