| 主权项 |
1. A tank sealing valve arranged in a passage network through which a fluid flows between a fuel tank and a canister, comprising:
a first valve unit and a second valve unit that are energized and controlled by a control portion to open and close, the first valve unit opening to control the fluid to flow with a relatively large flow amount, the first valve unit closing and the second valve unit opening to control the fluid to flow with a relatively small flow amount that is smaller than the relatively large flow amount, the first valve unit including
an outer case body that includes at least three ports which include inlets and outlets of the fluid,a valve body that is movably received in the outer case body and includes a valve portion opening and closing a first port of the three ports and a column portion extending from the valve portion,a spring that biases the valve body in a direction closing the first port,an electromagnetic solenoid cancelling a biasing force of the spring and driving the valve body in a direction opening the first port, anda diaphragm or a bellows that is arranged between the column portion and the outer base body and divides an interior of the outer case body into at least two chambers, wherein the valve portion is received in a first chamber of the two chambers and the column portion protrudes into a second chamber of the two chambers, the first port and a second port of the three ports are open toward the first chamber and a third port of the three ports is open toward the second chamber, the valve body includes a through passage penetrating the valve portion and the column portion, the valve portion communicates with the first port and the second chamber through the through passage in a case where the first port is closed, and the second valve unit opens and closes the third port. |
