| 摘要 |
<p>PURPOSE:To perform adjustment of pressure in a short period of time and simplify measuring system by performing minute adjustment of tire pressure repeatedly by means of a minute adjustment control means after controlling tire pressure through estimation of tire pressure from the outside during adjustment of pressure by means a differential pressure estimate control means. CONSTITUTION:Pressure of a tire 1 is estimated based on a differential pressure between the tire 1 and a piping 20 which is expressed by the primary equation of pressure value of a pressure sensor 4 and a pressure control valve 6 is controlled so that pressure coincides with the desired pressure of the tire 1 when there is an air flow between differential pressure estimate control means 21 of an electronic control section 2 and the piping 20. Also, a minute adjustment control means 22 estimates the pressure of the tire 1 obtained by subtracting at least a pressure drop of a tire pressure adjusting valve 13 from the pressure sensor 4 in the case of no air flow when pressure of the tire 1 becomes the desired pressure valve by the differential pressure estimate control means 21, and adjust the pressure control valve 6 repeatedly so that pressure coincides with the desired pressure of the tire 1. Thus, it is possible to perform adjustment of pressure in a short period of the time and achieve simplification of the structure.</p> |
