JPS6159551U

JPS6159551U -

Info

Publication number: JPS6159551U
Application number: JP14348284U
Authority: JP
Priority date: 1984-09-25
Filing date: 1984-09-25
Publication date: 1986-04-22

Description

[Brief explanation of the drawing]

第１図は本考案に係る車両用燃料タンクのキヤ
ツプの一実施例を示す使用状態の縦断面図、第２
図は第１図の−線断面図、第３図は同キヤツ
プの他の実施例を示す部分縦断面図、第４図は従
来のキヤツプを示す使用状態の縦断面図である。符号の説明、１…キヤツプ本体、４…燃料タン
ク、５…注入口、９…中空内部、９′…内壁面、
１０…気体室、１１…液体室、１２…ピストン部
材、１３…微小間隙、１４…外部通気路、１５…
内部通気孔、１６…液戻し孔、１７…弁体。 Fig. 1 is a vertical cross-sectional view showing one embodiment of the vehicle fuel tank cap according to the present invention in a state of use;
1, FIG. 3 is a partial longitudinal sectional view showing another embodiment of the cap, and FIG. 4 is a longitudinal sectional view showing the conventional cap in use. Explanation of symbols: 1...Cap body, 4...Fuel tank, 5...Inlet, 9...Hollow interior, 9'...Inner wall surface,
DESCRIPTION OF SYMBOLS 10... Gas chamber, 11... Liquid chamber, 12... Piston member, 13... Minute gap, 14... External ventilation path, 15...
Internal ventilation hole, 16...liquid return hole, 17...valve body.

Claims

[Scope of utility model registration request]

In a vehicle fuel tank cap that is attached to an injection port of a vehicle fuel tank, a piston member is slidably disposed inside the hollow interior of the cap body to form a minute gap between the cap and the inner wall surface. , a gas chamber and a liquid chamber are formed on both sides of the cap, and the gas chamber is communicated with the outside of the tank via an external ventilation passage formed in the cap body, and the liquid chamber is connected to an internal communication passage formed in the cap body. A liquid return hole is provided in the cap body to communicate with the inside of the fuel tank through the air hole, and to return the liquid fuel accumulated in the liquid chamber into the fuel tank. A valve body capable of opening and closing the passage is provided, and the valve body closes the external vent hole when the piston member moves from the liquid chamber side to the gas chamber side, and also closes the external vent hole when the piston member moves from the liquid chamber side to the gas chamber side. A fuel tank cap for a vehicle, characterized in that the external ventilation path is opened when the cap moves from the gas chamber side to the liquid chamber side.