| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel tank valve device capable of making an automatic stop to function when a full liquid level is achieved during oil supply, positively preventing excessive fueling, and preventing the overflow of fuel from an oil supply port after the automatic stop. <P>SOLUTION: The fuel tank valve device includes a casing 20 and a valve mechanism 40. The valve mechanism 40 has a first valve unit 41 having a first valve connecting hole 47b, and a second valve unit 50 that opens and closes the first valve connecting hole 47b. The first valve unit 41 completely closes a valve flow path 20P by moving by a force in the valve closing direction when the pressure of a second communication path 37P exceeds a preset first pressure value Pr1. In a state that the first valve unit 41 closes the valve flow path 20P, when the pressure of the second communication path 37P exceeds a preset second pressure value Pr2 that is larger than the first pressure value Pr1, the second valve unit 50 receives pressure from the first valve connecting hole 47b and moves to open the first valve connecting hole 47b communicating with the valve flow path 20P. <P>COPYRIGHT: (C)2012,JPO&INPIT |
