VALVE DEVICE FOR FUEL TANK

摘要

One embodiment provides a valve device for fuel tank. The valve device includes: a housing in which a valve chamber and a ventilation chamber are divided by a partition wall having a first and second openings; a vapor discharge outlet communicating with the ventilation chamber; first and second float valves vertically movably housed in the valve chamber to close the first and second openings, respectively; and a recess portion defined in a part of the ventilation chamber correspondingly with the first opening. A passage is provided to communicate the discharge outlet with the recess portion. And, a first wall portion is provided around an end of the passage on a side of the recess portion so as to block the fuel that flows out of the second opening into the first opening from heading to the third opening.

主权项

1. A valve device for fuel tank, including:
a housing in which a lower-side valve chamber and an upper-side ventilation chamber are divided by a partition wall, the partition wall including a first opening and a second opening through which the valve chamber and the ventilation chamber are communicated, respectively; a fuel vapor discharge outlet provided to communicate with the ventilation chamber; a first float valve vertically movably housed in the valve chamber to close the first opening when a fuel level in a fuel tank reaches near a full fuel level; a second float valve vertically movably housed in the valve chamber to close the second opening when the fuel level in the fuel tank abnormally rises; and a recess portion defined in a part of the ventilation chamber such that the first opening is provided on a bottom portion of the recess portion, wherein, in a plan view, a third opening functioning as the fuel vapor discharge outlet is positioned apart from the recess portion, wherein a passage extending to communicate the third opening with the recess portion is provided, and wherein a first wall portion extends from a ceiling wall inner surface of the ventilation chamber around an end of the passage on a side of the recess portion so as to block the fuel that flows out of the second opening into the first opening from heading to the third opening.