| 摘要 |
The device comprises a hollow body (16) comprising an inlet port (20) secured to means for injecting a pressurised gaseous fluid, an inflation port (24) in communication with the tyre at a pressure (PO), and an outlet port (21) for releasing said fluid to the outside; according to the invention, it comprises a piston (25) slidably mounted in at least one chamber (17) of the body (16) under the effect of the injection of the fluid via the inlet port (20), said piston (25) cooperating with a movable assembly (35, 36, 39) in combination with an exhaust valve (27) such that: - under the effect of the injection of the gaseous fluid at a pressure (P1>P0), the piston (25) and the movable assembly (35, 36, 39) are moved linearly toward a first elastic member (38) relative to the exhaust valve (27), which remains fixed, until said piston (25) and said assembly (35, 36, 39) reach a stop position corresponding to the opening of the injection valve (36) and the closing of the exhaust valve (27), - under the effect of the injection of the gaseous fluid at a pressure (P2>P1), the piston (25) is moved toward a second elastic member (40) and relative to the movable assembly (35, 36, 39), which remains in the stop position, causing an inflation member (39) to close and the exhaust valve (27) to move toward a third elastic member (30) corresponding to the opening of same from the injection valve (36), which remains open. |
