| 摘要 |
An air maintenance tire assembly is disclosed comprising a tire having a tire cavity bounded by first and second sidewalls extending to a tire tread region and (i) a tire-mounted air pumping means for pumping pressurized air into the tire cavity to maintain air pressure within the tire cavity at a defined pressure level, or (ii) a tire-based pressurized air pumping assembly for pumping tire-generated pressurized air into the tire cavity to maintain air pressure within the tire cavity at a preferred pressure level. The tire has an elongate valve stem projecting outward from the tire cavity, the valve stem having an internal valve stem air passageway or an internal axial valve stem air passageway in communication with the tire cavity operative to direct pressurized air from the valve stem air passageway into the cavity. A pressure control assembly is positioned at a control location in proximal relationship to the valve stem and operative to selectively control a flow of pressurized air from the tire-mounted air pumping means or from the tire-based pressurized air pumping assembly through the valve stem air passageway and into the tire cavity responsive to a detected air pressure level within the tire cavity. |
